From b4635596941d1afeaa9ee8ad20dff83162d1e20b Mon Sep 17 00:00:00 2001 From: dong-jy Date: Mon, 29 May 2017 20:47:48 +0800 Subject: [PATCH 001/387] Update breaking_bad.py --- string/breaking_bad.py | 39 ++++++++++++++++++++++++++++++++++++--- 1 file changed, 36 insertions(+), 3 deletions(-) diff --git a/string/breaking_bad.py b/string/breaking_bad.py index 3248d9108..e1cae5f57 100644 --- a/string/breaking_bad.py +++ b/string/breaking_bad.py @@ -16,8 +16,22 @@ My solution: (I sorted the symbols array in descending order of length and ran loop over chemicals array to find a symbol match(using indexOf in javascript) which -worked. But I din't make it through the interview, I am guessing my solution -was O(n2) and they expected an efficient algorithm. +worked. But I didn't make it through the interview, I am guessing my solution +was O(n^2) and they expected an efficient algorithm. + + +note: +This approach didn't pass interview because it did wrong in conditions like: + +input: +chemicals = ['Amazon', 'Microsoft', 'Google'] +symbols = ['I', 'Am', 'cro', 'Na', 'le', 'abc', 'o'] # add 'o' here + +expected: +['[am]azon', 'mi[cro]soft', 'goog[le]'] + +exact output: +['[Am]azon', 'Mi[cro]soft', 'Goog[le]', 'Amaz[o]n', 'Micr[o]s[o]ft', 'G[o][o]gle'] """ chemicals = ['Amazon', 'Microsoft', 'Google'] @@ -35,8 +49,27 @@ def match_symbol(chemicals, symbols): return combined +print(match_symbol(chemicals, symbols)) + + +# An improved version of above, get right output. +def match_symbol_1(symbols, words): + import re + bracketed_list = [] + for w in words: + longest_match='' + for s in symbols: + matchs = re.findall(s, w) + for m in matchs: + longest_match = m if len(longest_match) < len(m) else longest_match + bracketed.append(re.sub(longest_match, '[{}]'.format(longest_match), w)) + return bracketed_list + +symbols = ['I', 'Am', 'cro', 'Na', 'le', 'abc', 'o'] +words = ['Amazon', 'Microsoft', 'Google'] +print(match_symbol_1(symbols, words)) +# >>> ['[Am]azon', 'Mi[cro]soft', 'Goog[le]'] -print match_symbol(chemicals, symbols) """ One approach is to use a Trie for the dictionary (the symbols), and then match From 48bddd872461b1a5dba70c175fc09f4f3f49ec7d Mon Sep 17 00:00:00 2001 From: dong-jy Date: Tue, 30 May 2017 12:30:58 +0800 Subject: [PATCH 002/387] Update breaking_bad.py --- string/breaking_bad.py | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/string/breaking_bad.py b/string/breaking_bad.py index e1cae5f57..b3087c16a 100644 --- a/string/breaking_bad.py +++ b/string/breaking_bad.py @@ -52,7 +52,20 @@ def match_symbol(chemicals, symbols): print(match_symbol(chemicals, symbols)) -# An improved version of above, get right output. + +""" +An improved version of above, get right output. + +symbols = ['I', 'Am', 'cro', 'Na', 'le', 'abc', 'o'] +words = ['Amazon', 'Microsoft', 'Google'] +print(match_symbol_1(symbols, words)) +>>> ['[Am]azon', 'Mi[cro]soft', 'Goog[le]'] + +O(mn) time +m = len(symbols), n = len(words) +Assuming re.findall(s, w) is O(1) time. +""" + def match_symbol_1(symbols, words): import re bracketed_list = [] @@ -65,10 +78,6 @@ def match_symbol_1(symbols, words): bracketed.append(re.sub(longest_match, '[{}]'.format(longest_match), w)) return bracketed_list -symbols = ['I', 'Am', 'cro', 'Na', 'le', 'abc', 'o'] -words = ['Amazon', 'Microsoft', 'Google'] -print(match_symbol_1(symbols, words)) -# >>> ['[Am]azon', 'Mi[cro]soft', 'Goog[le]'] """ From 5a0f4cab0df74010aeafeaff2537d5fa31635e64 Mon Sep 17 00:00:00 2001 From: Jacob Date: Fri, 30 Jun 2017 23:12:44 -0700 Subject: [PATCH 003/387] Add three solutions for kth_to_last and local tests --- kth_to_last.py | 120 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 120 insertions(+) create mode 100644 kth_to_last.py diff --git a/kth_to_last.py b/kth_to_last.py new file mode 100644 index 000000000..48015a937 --- /dev/null +++ b/kth_to_last.py @@ -0,0 +1,120 @@ +class Node(): + def __init__(self, val=None): + self.val = val + self.next = None + + +def kth_to_last_eval(head, k): + """ + This is a suboptimal, hacky method using eval(), which is not + safe for user input. We guard against danger by ensuring k in an int + """ + if not isinstance(k, int) or not head.val: + return False + + nexts = '.'.join(['next' for n in range(1, k+1)]) + seeker = str('.'.join(['head', nexts])) + + while head: + if eval(seeker) is None: + return head + else: + head = head.next + + return False + + +def kth_to_last_dict(head, k): + """ + This is a brute force method where we keep a dict the size of the list + Then we check it for the value we need. If the key is not in the dict, + our and statement will short circuit and return False + """ + if not (head and k > -1): + return False + d = dict() + count = 0 + while head: + d[count] = head + head = head.next + count += 1 + return len(d)-k in d and d[len(d)-k] + + +def kth_to_last(head, k): + """ + This is an optimal method using iteration. + We move p1 k steps ahead into the list. + Then we move p1 and p2 together until p1 hits the end. + """ + if not (head or k > -1): + return False + p1 = head + p2 = head + for i in range(1, k+1): + if p1 is None: + # Went too far, k is not valid + raise IndexError + p1 = p1.next + while p1: + p1 = p1.next + p2 = p2.next + return p2 + + +def printLinkedList(head): + string = "" + while head.next: + string += head.val + " -> " + head = head.next + string += head.val + print(string) + + +def test(): + # def make_test_li + # A A B C D C F G + a1 = Node("A") + a2 = Node("A") + b = Node("B") + c1 = Node("C") + d = Node("D") + c2 = Node("C") + f = Node("F") + g = Node("G") + a1.next = a2 + a2.next = b + b.next = c1 + c1.next = d + d.next = c2 + c2.next = f + f.next = g + printLinkedList(a1) + + # test kth_to_last_eval + kth = kth_to_last_eval(a1, 4) + try: + assert kth.val == "D" + except AssertionError as e: + e.args += ("Expecting D, got %s" % kth.val,) + raise + + # test kth_to_last_dict + kth = kth_to_last_dict(a1, 4) + try: + assert kth.val == "D" + except AssertionError as e: + e.args += ("Expecting D, got %s" % kth.val,) + raise + + # test kth_to_last + kth = kth_to_last(a1, 4) + try: + assert kth.val == "D" + except AssertionError as e: + e.args += ("Expecting D, got %s" % kth.val,) + raise + print("all passed.") + +if __name__ == '__main__': + test() From f44805d8673bdf1382a48962e46ba4e2a7ec7e79 Mon Sep 17 00:00:00 2001 From: Jacob Date: Sat, 1 Jul 2017 17:45:57 -0700 Subject: [PATCH 004/387] Add check for None values in node or node.next We raise a ValueError if the rules of the API are broken (passing a null node or the tail node) --- delete_node.py | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 delete_node.py diff --git a/delete_node.py b/delete_node.py new file mode 100644 index 000000000..4a78ccffb --- /dev/null +++ b/delete_node.py @@ -0,0 +1,15 @@ +""" +Write a function to delete a node (except the tail) +in a singly linked list, given only access to that node. + +Supposed the linked list is 1 -> 2 -> 3 -> 4 and +you are given the third node with value 3, +the linked list should become 1 -> 2 -> 4 after calling your function. +""" + + +def delete_node(node): + if node is None or node.next is None: + raise ValueError + node.val = node.next.val + node.next = node.next.next From fe575326e7d821f7a4c4f09fae49964c7e543729 Mon Sep 17 00:00:00 2001 From: Jacob Date: Sat, 1 Jul 2017 19:01:50 -0700 Subject: [PATCH 005/387] Update delete_node.py --- linkedlist/delete_node.py | 2 ++ 1 file changed, 2 insertions(+) diff --git a/linkedlist/delete_node.py b/linkedlist/delete_node.py index 93e761fef..4a78ccffb 100644 --- a/linkedlist/delete_node.py +++ b/linkedlist/delete_node.py @@ -9,5 +9,7 @@ def delete_node(node): + if node is None or node.next is None: + raise ValueError node.val = node.next.val node.next = node.next.next From 72a3047767a6850c958f6f17b98dda0670377e13 Mon Sep 17 00:00:00 2001 From: Jacob Date: Sat, 1 Jul 2017 19:02:25 -0700 Subject: [PATCH 006/387] Update remove_duplicates.py --- linkedlist/remove_duplicates.py | 143 ++++++++++++++++++++++---------- 1 file changed, 98 insertions(+), 45 deletions(-) diff --git a/linkedlist/remove_duplicates.py b/linkedlist/remove_duplicates.py index 683fd4f4d..48015a937 100644 --- a/linkedlist/remove_duplicates.py +++ b/linkedlist/remove_duplicates.py @@ -1,37 +1,66 @@ class Node(): - def __init__(self, val = None): + def __init__(self, val=None): self.val = val self.next = None -def removeDups(head): + +def kth_to_last_eval(head, k): """ - Time Complexity: O(N) - Space Complexity: O(N) + This is a suboptimal, hacky method using eval(), which is not + safe for user input. We guard against danger by ensuring k in an int """ - hashset = set() - prev = Node() + if not isinstance(k, int) or not head.val: + return False + + nexts = '.'.join(['next' for n in range(1, k+1)]) + seeker = str('.'.join(['head', nexts])) + while head: - if head.val in hashset: - prev.next = head.next + if eval(seeker) is None: + return head else: - hashset.add(head.val) - prev = head + head = head.next + + return False + + +def kth_to_last_dict(head, k): + """ + This is a brute force method where we keep a dict the size of the list + Then we check it for the value we need. If the key is not in the dict, + our and statement will short circuit and return False + """ + if not (head and k > -1): + return False + d = dict() + count = 0 + while head: + d[count] = head head = head.next + count += 1 + return len(d)-k in d and d[len(d)-k] + -def removeDupsWithoutSet(head): +def kth_to_last(head, k): """ - Time Complexity: O(N^2) - Space Complexity: O(1) + This is an optimal method using iteration. + We move p1 k steps ahead into the list. + Then we move p1 and p2 together until p1 hits the end. """ - current = head - while current: - runner = current - while runner.next: - if runner.next.val == current.val: - runner.next = runner.next.next - else: - runner = runner.next - current = current.next + if not (head or k > -1): + return False + p1 = head + p2 = head + for i in range(1, k+1): + if p1 is None: + # Went too far, k is not valid + raise IndexError + p1 = p1.next + while p1: + p1 = p1.next + p2 = p2.next + return p2 + def printLinkedList(head): string = "" @@ -41,27 +70,51 @@ def printLinkedList(head): string += head.val print(string) -# A A B C D C F G - -a1 = Node("A") -a2 = Node("A") -b = Node("B") -c1 = Node("C") -d = Node("D") -c2 = Node("C") -f = Node("F") -g = Node("G") - -a1.next = a2 -a2.next = b -b.next = c1 -c1.next = d -d.next = c2 -c2.next = f -f.next = g - -removeDups(a1) -printLinkedList(a1) -removeDupsWithoutSet(a1) -printLinkedList(a1) +def test(): + # def make_test_li + # A A B C D C F G + a1 = Node("A") + a2 = Node("A") + b = Node("B") + c1 = Node("C") + d = Node("D") + c2 = Node("C") + f = Node("F") + g = Node("G") + a1.next = a2 + a2.next = b + b.next = c1 + c1.next = d + d.next = c2 + c2.next = f + f.next = g + printLinkedList(a1) + + # test kth_to_last_eval + kth = kth_to_last_eval(a1, 4) + try: + assert kth.val == "D" + except AssertionError as e: + e.args += ("Expecting D, got %s" % kth.val,) + raise + + # test kth_to_last_dict + kth = kth_to_last_dict(a1, 4) + try: + assert kth.val == "D" + except AssertionError as e: + e.args += ("Expecting D, got %s" % kth.val,) + raise + + # test kth_to_last + kth = kth_to_last(a1, 4) + try: + assert kth.val == "D" + except AssertionError as e: + e.args += ("Expecting D, got %s" % kth.val,) + raise + print("all passed.") + +if __name__ == '__main__': + test() From 1b2a28d47b5398007cafe6160019f6f4d7c623b9 Mon Sep 17 00:00:00 2001 From: Jacob Date: Sat, 1 Jul 2017 19:03:22 -0700 Subject: [PATCH 007/387] Add a new linkedlist exercise file called partition --- linkedlist/partition.py | 76 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 linkedlist/partition.py diff --git a/linkedlist/partition.py b/linkedlist/partition.py new file mode 100644 index 000000000..ae6a2bab4 --- /dev/null +++ b/linkedlist/partition.py @@ -0,0 +1,76 @@ +""" +Write code to partition a linked list around a value x, such that all nodes less +than x come before all nodes greater than or equal to x. If x is contained +within the list, the values of x only need to be after the elements less than x. +The partition element x can appear anywhere in the "right partition"; +it does not need to appear between the left and right partitions. + +3 -> 5 -> 8 -> 5 -> 10 -> 2 -> 1 [partition=5] +3 -> 1 -> 2 -> 10 -> 5 -> 5 -> 8 + +We assume the values of all linked list nodes are int and that x in an int. +""" + + +class Node(): + def __init__(self, val=None): + self.val = int(val) + self.next = None + + +def printLinkedList(head): + string = "" + while head.next: + string += str(head.val) + " -> " + head = head.next + string += str(head.val) + print(string) + + +def partition(head, x): + left = None + right = None + prev = None + current = head + while current: + if int(current.val) >= x: + if not right: + right = current + else: + if not left: + left = current + else: + prev.next = current.next + left.next = current + left = current + left.next = right + if prev and prev.next is None: + break + # cache previous value in case it needs to be pointed elsewhere + prev = current + current = current.next + + +def test(): + a = Node("3") + b = Node("5") + c = Node("8") + d = Node("5") + e = Node("10") + f = Node("2") + g = Node("1") + + a.next = b + b.next = c + c.next = d + d.next = e + e.next = f + f.next = g + + printLinkedList(a) + partition(a, 5) + printLinkedList(a) + + +if __name__ == '__main__': + test() From 931c80932df8e82ce90f24e659a74e3385d51f86 Mon Sep 17 00:00:00 2001 From: Jacob Date: Sat, 1 Jul 2017 19:03:38 -0700 Subject: [PATCH 008/387] Delete delete_node.py --- delete_node.py | 15 --------------- 1 file changed, 15 deletions(-) delete mode 100644 delete_node.py diff --git a/delete_node.py b/delete_node.py deleted file mode 100644 index 4a78ccffb..000000000 --- a/delete_node.py +++ /dev/null @@ -1,15 +0,0 @@ -""" -Write a function to delete a node (except the tail) -in a singly linked list, given only access to that node. - -Supposed the linked list is 1 -> 2 -> 3 -> 4 and -you are given the third node with value 3, -the linked list should become 1 -> 2 -> 4 after calling your function. -""" - - -def delete_node(node): - if node is None or node.next is None: - raise ValueError - node.val = node.next.val - node.next = node.next.next From c0dc17126e5c26a80c0b80e4c928d32584560ddf Mon Sep 17 00:00:00 2001 From: Jacob Date: Sat, 1 Jul 2017 19:03:49 -0700 Subject: [PATCH 009/387] Delete kth_to_last.py --- kth_to_last.py | 120 ------------------------------------------------- 1 file changed, 120 deletions(-) delete mode 100644 kth_to_last.py diff --git a/kth_to_last.py b/kth_to_last.py deleted file mode 100644 index 48015a937..000000000 --- a/kth_to_last.py +++ /dev/null @@ -1,120 +0,0 @@ -class Node(): - def __init__(self, val=None): - self.val = val - self.next = None - - -def kth_to_last_eval(head, k): - """ - This is a suboptimal, hacky method using eval(), which is not - safe for user input. We guard against danger by ensuring k in an int - """ - if not isinstance(k, int) or not head.val: - return False - - nexts = '.'.join(['next' for n in range(1, k+1)]) - seeker = str('.'.join(['head', nexts])) - - while head: - if eval(seeker) is None: - return head - else: - head = head.next - - return False - - -def kth_to_last_dict(head, k): - """ - This is a brute force method where we keep a dict the size of the list - Then we check it for the value we need. If the key is not in the dict, - our and statement will short circuit and return False - """ - if not (head and k > -1): - return False - d = dict() - count = 0 - while head: - d[count] = head - head = head.next - count += 1 - return len(d)-k in d and d[len(d)-k] - - -def kth_to_last(head, k): - """ - This is an optimal method using iteration. - We move p1 k steps ahead into the list. - Then we move p1 and p2 together until p1 hits the end. - """ - if not (head or k > -1): - return False - p1 = head - p2 = head - for i in range(1, k+1): - if p1 is None: - # Went too far, k is not valid - raise IndexError - p1 = p1.next - while p1: - p1 = p1.next - p2 = p2.next - return p2 - - -def printLinkedList(head): - string = "" - while head.next: - string += head.val + " -> " - head = head.next - string += head.val - print(string) - - -def test(): - # def make_test_li - # A A B C D C F G - a1 = Node("A") - a2 = Node("A") - b = Node("B") - c1 = Node("C") - d = Node("D") - c2 = Node("C") - f = Node("F") - g = Node("G") - a1.next = a2 - a2.next = b - b.next = c1 - c1.next = d - d.next = c2 - c2.next = f - f.next = g - printLinkedList(a1) - - # test kth_to_last_eval - kth = kth_to_last_eval(a1, 4) - try: - assert kth.val == "D" - except AssertionError as e: - e.args += ("Expecting D, got %s" % kth.val,) - raise - - # test kth_to_last_dict - kth = kth_to_last_dict(a1, 4) - try: - assert kth.val == "D" - except AssertionError as e: - e.args += ("Expecting D, got %s" % kth.val,) - raise - - # test kth_to_last - kth = kth_to_last(a1, 4) - try: - assert kth.val == "D" - except AssertionError as e: - e.args += ("Expecting D, got %s" % kth.val,) - raise - print("all passed.") - -if __name__ == '__main__': - test() From 7b810db54dab751fb07e2d84d19080824cd31d86 Mon Sep 17 00:00:00 2001 From: Jacob Date: Mon, 3 Jul 2017 19:55:36 -0700 Subject: [PATCH 010/387] Add new is_palidrome_dict() function --- linkedlist/is_palindrome.py | 40 +++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/linkedlist/is_palindrome.py b/linkedlist/is_palindrome.py index b42b20727..125650712 100644 --- a/linkedlist/is_palindrome.py +++ b/linkedlist/is_palindrome.py @@ -46,3 +46,43 @@ def is_palindrome_stack(head): cur = cur.next return True + + +def is_palindrome_dict(head): + """ + This function builds up a dictionary where the keys are the values of the list, + and the values are the positions at which these values occur in the list. + We then iterate over the dict and if there is more than one key with an odd + number of occurrences, bail out and return False. + Otherwise, we want to ensure that the positions of occurrence sum to the + value of the length of the list - 1, working from the outside of the list inward. + For example: + Input: 1 -> 1 -> 2 -> 3 -> 2 -> 1 -> 1 + d = {1: [0,1,5,6], 2: [2,4], 3: [3]} + '3' is the middle outlier, 2+4=6, 0+6=6 and 5+1=6 so we have a palindrome. + """ + if not head or not head.next: + return True + d = {} + pos = 0 + while head: + if head.val in d.keys(): + d[head.val].append(pos) + else: + d[head.val] = [pos] + head = head.next + pos += 1 + checksum = pos - 1 + middle = 0 + for v in d.values(): + if len(v) % 2 != 0: + middle += 1 + else: + step = 0 + for i in range(0, len(v)): + if v[i] + v[len(v)-1-step] != checksum: + return False + step += 1 + if middle > 1: + return False + return True From d402c25a6b257778e08e6db2890ae575432daed0 Mon Sep 17 00:00:00 2001 From: Jacob Date: Tue, 4 Jul 2017 16:06:15 -0700 Subject: [PATCH 011/387] Add new linkedlist file for intersection --- linkedlist/intersection.py | 93 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100644 linkedlist/intersection.py diff --git a/linkedlist/intersection.py b/linkedlist/intersection.py new file mode 100644 index 000000000..c2ee75417 --- /dev/null +++ b/linkedlist/intersection.py @@ -0,0 +1,93 @@ +def intersection(h1, h2): + """ + This function takes two lists and returns the node they have in common, if any. + In this example: + 1 -> 3 -> 5 + \ + 7 -> 9 -> 11 + / + 2 -> 4 -> 6 + ...we would return 7. + Note that the node itself is the unique identifier, not the value of the node. + """ + count = 0 + flag = None + h1_orig = h1 + h2_orig = h2 + while h1 or h2: + count += 1 + if not flag and (h1.next is None or h2.next is None): + # We hit the end of one of the lists, set a flag for this + flag = (count, h1.next, h2.next) + if h1: + h1 = h1.next + if h2: + h2 = h2.next + long_len = count # Mark the length of the longer of the two lists + short_len = flag[0] + if flag[1] is None: + shorter = h1_orig + longer = h2_orig + elif flag[2] is None: + shorter = h2_orig + longer = h1_orig + while longer and shorter: + while long_len > short_len: + # force the longer of the two lists to "catch up" + longer = longer.next + long_len -= 1 + if longer == shorter: + # The nodes match, return the node + return longer + else: + longer = longer.next + shorter = shorter.next + return None + + +class Node(object): + def __init__(self, val=None): + self.val = val + self.next = None + + +def test(): + def printLinkedList(head): + string = "" + while head.next: + string += head.val + " -> " + head = head.next + string += head.val + print(string) + + # 1 -> 3 -> 5 + # \ + # 7 -> 9 -> 11 + # / + # 2 -> 4 -> 6 + + a1 = Node("1") + b1 = Node("3") + c1 = Node("5") + d = Node("7") + a2 = Node("2") + b2 = Node("4") + c2 = Node("6") + e = Node("9") + f = Node("11") + + a1.next = b1 + b1.next = c1 + c1.next = d + a2.next = b2 + b2.next = c2 + c2.next = d + d.next = e + e.next = f + + printLinkedList(a1) + printLinkedList(a2) + print(intersection(a1, a2)) + assert intersection(a1, a2).val == d.val + +test() From a9c0286d909f7cd3e531c9c7e8ba597816f0ff26 Mon Sep 17 00:00:00 2001 From: Jacob Date: Tue, 4 Jul 2017 16:15:36 -0700 Subject: [PATCH 012/387] Add linkedlist file for detect_loop --- linkedlist/detect_loop.py | 50 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 linkedlist/detect_loop.py diff --git a/linkedlist/detect_loop.py b/linkedlist/detect_loop.py new file mode 100644 index 000000000..d3d21d01e --- /dev/null +++ b/linkedlist/detect_loop.py @@ -0,0 +1,50 @@ +def detect_loop(head): + """ + Given a circular linked list, implement an algorithm which returns the node + at the beginning of the loop. + * DEFINITION + * Circular linked list: A (corrupt) linked list in which a node's next pointer points to an earlier node, so as to make a loop in the linked list. + * EXAMPLE + * Input: A->B->C->D->E->C [the same C as earlier] + * Output: C + """ + if not (head and head.next): + return None + seen = [] + while head: + if head in seen and head.next in seen: + return head + else: + seen.append(head) + head = head.next + return None + + +class Node(object): + def __init__(self, val=None): + self.val = val + self.next = None + + +def test(): + + # A->B->C->D->E->C [the same C as earlier] + + a = Node("A") + b = Node("B") + c = Node("C") + d = Node("D") + e = Node("E") + + a.next = b + b.next = c + c.next = d + d.next = e + e.next = c + + # We do not print the list itself, because it will run forever! + print detect_loop(a) + assert detect_loop(a).val == c.val + +if __name__ == '__main__': + test() From 079f86f46acfd8a8124f564cf8037f0df25d38c0 Mon Sep 17 00:00:00 2001 From: Ben Steadman <=> Date: Sat, 14 Oct 2017 18:06:09 +0100 Subject: [PATCH 013/387] add set_covering --- README.md | 1 + set/set_covering.py | 115 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 116 insertions(+) create mode 100644 set/set_covering.py diff --git a/README.md b/README.md index 1b4a87966..9b09e003b 100644 --- a/README.md +++ b/README.md @@ -131,6 +131,7 @@ Minimal and clean example implementations of data structures and algorithms in P - [last_occurance](search/last_occurance.py) - [set](set) - [randomized_set](set/randomized_set.py) + - [set_covering](set/set_covering.py) - [sort](sort) - [bubble_sort](sort/bubble_sort.py) - [comb_sort](sort/comb_sort.py) diff --git a/set/set_covering.py b/set/set_covering.py new file mode 100644 index 000000000..ba51f62d0 --- /dev/null +++ b/set/set_covering.py @@ -0,0 +1,115 @@ +from itertools import chain, combinations + +""" +Universe *U* of n elements +Collection of subsets of U: + S = S1,S2...,Sm + Where every substet Si has an associated cost. + +Find a minimum cost subcollection of S that covers all elements of U + +Example: + U = {1,2,3,4,5} + S = {S1,S2,S3} + + S1 = {4,1,3}, Cost(S1) = 5 + S2 = {2,5}, Cost(S2) = 10 + S3 = {1,4,3,2}, Cost(S3) = 3 + + Output: + Set cover = {S2, S3} + Min Cost = 13 +""" + + +def powerset(iterable): + """Calculate the powerset of any iterable. + + For a range of integers up to the length of the given list, + make all possible combinations and chain them together as one object. + From https://docs.python.org/3/library/itertools.html#itertools-recipes + """ + "list(powerset([1,2,3])) --> [(), (1,), (2,), (3,), (1,2), (1,3), (2,3), (1,2,3)]" + s = list(iterable) + return chain.from_iterable(combinations(s, r) for r in range(len(s) + 1)) + + +def optimal_set_cover(universe, subsets, costs): + """ Optimal algorithm - DONT USE ON BIG INPUTS - O(2^n) complexity! + Finds the minimum cost subcollection os S that covers all elements of U + + Args: + universe (list): Universe of elements + subsets (dict): Subsets of U {S1:elements,S2:elements} + costs (dict): Costs of each subset in S - {S1:cost, S2:cost...} + """ + pset = powerset(subsets.keys()) + best_set = None + best_cost = float("inf") + for subset in pset: + covered = set() + cost = 0 + for s in subset: + covered.update(subsets[s]) + cost += costs[s] + if len(covered) == len(universe) and cost < best_cost: + best_set = subset + best_cost = cost + return best_set + + +def greedy_set_cover(universe, subsets, costs): + """Approximate greedy algorithm for set-covering. Can be used on large + inputs - though not an optimal solution. + + Args: + universe (list): Universe of elements + subsets (dict): Subsets of U {S1:elements,S2:elements} + costs (dict): Costs of each subset in S - {S1:cost, S2:cost...} + """ + elements = set(e for s in subsets.keys() for e in subsets[s]) + # elements don't cover universe -> invalid input for set cover + if elements != universe: + return None + + # track elements of universe covered + covered = set() + cover_sets = [] + + while covered != universe: + min_cost_elem_ratio = float("inf") + min_set = None + # find set with minimum cost:elements_added ratio + for s, elements in subsets.items(): + new_elements = len(elements - covered) + # set may have same elements as already covered -> new_elements = 0 + # check to avoid division by 0 error + if new_elements != 0: + cost_elem_ratio = costs[s] / new_elements + if cost_elem_ratio < min_cost_elem_ratio: + min_cost_elem_ratio = cost_elem_ratio + min_set = s + cover_sets.append(min_set) + # union + covered |= subsets[min_set] + return cover_sets + + +if __name__ == '__main__': + universe = {1, 2, 3, 4, 5} + subsets = {'S1': {4, 1, 3}, 'S2': {2, 5}, 'S3': {1, 4, 3, 2}} + costs = {'S1': 5, 'S2': 10, 'S3': 3} + + optimal_cover = optimal_set_cover(universe, subsets, costs) + optimal_cost = sum(costs[s] for s in optimal_cover) + + greedy_cover = greedy_set_cover(universe, subsets, costs) + greedy_cost = sum(costs[s] for s in greedy_cover) + + print('Optimal Set Cover:') + print(optimal_cover) + print('Cost = %s' % optimal_cost) + + print('Greedy Set Cover:') + print(greedy_cover) + print('Cost = %s' % greedy_cost) From 0f6171880e447b7b2f4229efe1900e2e810cd320 Mon Sep 17 00:00:00 2001 From: Arkady Telegin Date: Thu, 26 Oct 2017 20:17:49 +0400 Subject: [PATCH 014/387] Add different implementation of reverse_string.py Add a simple and pythonic function of reversing a string. --- string/reverse_string.py | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/string/reverse_string.py b/string/reverse_string.py index 963caef28..dc695e2fe 100644 --- a/string/reverse_string.py +++ b/string/reverse_string.py @@ -22,4 +22,7 @@ def pythonic(s): r = list(reversed(s)) return "".join(r) -print(pythonic(s)) +def ultra_pythonic(s): + return s[::-1] + +print(ultra_pythonic(s)) From 59fc35989103fea9e7b1ab974bdefd05e5b1336c Mon Sep 17 00:00:00 2001 From: Ashay Walke Date: Tue, 31 Oct 2017 09:44:46 +0530 Subject: [PATCH 015/387] Added the egg dropping problem in the DP repo --- dp/egg_drop.py | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 dp/egg_drop.py diff --git a/dp/egg_drop.py b/dp/egg_drop.py new file mode 100644 index 000000000..3f71c3e44 --- /dev/null +++ b/dp/egg_drop.py @@ -0,0 +1,31 @@ +# A Dynamic Programming based Python Program for the Egg Dropping Puzzle +INT_MAX = 32767 + +# Function to get minimum number of trials needed in worst +# case with n eggs and k floors +def eggDrop(n, k): + # A 2D table where entery eggFloor[i][j] will represent minimum + # number of trials needed for i eggs and j floors. + eggFloor = [[0 for x in range(k+1)] for x in range(n+1)] + + # We need one trial for one floor and0 trials for 0 floors + for i in range(1, n+1): + eggFloor[i][1] = 1 + eggFloor[i][0] = 0 + + # We always need j trials for one egg and j floors. + for j in range(1, k+1): + eggFloor[1][j] = j + + # Fill rest of the entries in table using optimal substructure + # property + for i in range(2, n+1): + for j in range(2, k+1): + eggFloor[i][j] = INT_MAX + for x in range(1, j+1): + res = 1 + max(eggFloor[i-1][x-1], eggFloor[i][j-x]) + if res < eggFloor[i][j]: + eggFloor[i][j] = res + + # eggFloor[n][k] holds the result + return eggFloor[n][k] From 5d792501df5927302d87b86c1382787a95c165d9 Mon Sep 17 00:00:00 2001 From: Shivam Agarwal Date: Tue, 31 Oct 2017 10:56:22 +0530 Subject: [PATCH 016/387] Create rod_cut.py Rod Cutting Dp Problem --- dp/rod_cut.py | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 dp/rod_cut.py diff --git a/dp/rod_cut.py b/dp/rod_cut.py new file mode 100644 index 000000000..48312b9c3 --- /dev/null +++ b/dp/rod_cut.py @@ -0,0 +1,25 @@ +# A Dynamic Programming solution for Rod cutting problem +INT_MIN = -32767 + +# Returns the best obtainable price for a rod of length n and +# price[] as prices of different pieces +def cutRod(price, n): + val = [0 for x in range(n+1)] + val[0] = 0 + + # Build the table val[] in bottom up manner and return + # the last entry from the table + for i in range(1, n+1): + max_val = INT_MIN + for j in range(i): + max_val = max(max_val, price[j] + val[i-j-1]) + val[i] = max_val + + return val[n] + +# Driver program to test above functions +arr = [1, 5, 8, 9, 10, 17, 17, 20] +size = len(arr) +print("Maximum Obtainable Value is " + str(cutRod(arr, size))) + +# This code is contributed by Bhavya Jain From 44d33c4cbbca7f8c56009c7004f4b93901c67cec Mon Sep 17 00:00:00 2001 From: Shivam Agarwal Date: Tue, 31 Oct 2017 11:00:11 +0530 Subject: [PATCH 017/387] Create job_scheduling.py Weighted Job Scheduling in O(n Log n) time --- dp/job_scheduling.py | 62 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 dp/job_scheduling.py diff --git a/dp/job_scheduling.py b/dp/job_scheduling.py new file mode 100644 index 000000000..b644303e7 --- /dev/null +++ b/dp/job_scheduling.py @@ -0,0 +1,62 @@ +# Python program for weighted job scheduling using Dynamic +# Programming and Binary Search + +# Class to represent a job +class Job: + def __init__(self, start, finish, profit): + self.start = start + self.finish = finish + self.profit = profit + + +# A Binary Search based function to find the latest job +# (before current job) that doesn't conflict with current +# job. "index" is index of the current job. This function +# returns -1 if all jobs before index conflict with it. +# The array jobs[] is sorted in increasing order of finish +# time. +def binarySearch(job, start_index): + + # Initialize 'lo' and 'hi' for Binary Search + lo = 0 + hi = start_index - 1 + + # Perform binary Search iteratively + while lo <= hi: + mid = (lo + hi) // 2 + if job[mid].finish <= job[start_index].start: + if job[mid + 1].finish <= job[start_index].start: + lo = mid + 1 + else: + return mid + else: + hi = mid - 1 + return -1 + +# The main function that returns the maximum possible +# profit from given array of jobs +def schedule(job): + + # Sort jobs according to finish time + job = sorted(job, key = lambda j: j.finish) + + # Create an array to store solutions of subproblems. table[i] + # stores the profit for jobs till arr[i] (including arr[i]) + n = len(job) + table = [0 for _ in range(n)] + + table[0] = job[0].profit; + + # Fill entries in table[] using recursive property + for i in range(1, n): + + # Find profit including the current job + inclProf = job[i].profit + l = binarySearch(job, i) + if (l != -1): + inclProf += table[l]; + + # Store maximum of including and excluding + table[i] = max(inclProf, table[i - 1]) + + return table[n-1] From b9da1a5de404e3fee170e71a6c11fc7ff5317daf Mon Sep 17 00:00:00 2001 From: Will Shanks <92five@gmail.com> Date: Tue, 31 Oct 2017 22:00:31 -0600 Subject: [PATCH 018/387] added find all cliques alg --- graph/find_all_cliques.py | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 graph/find_all_cliques.py diff --git a/graph/find_all_cliques.py b/graph/find_all_cliques.py new file mode 100644 index 000000000..7d693f0b5 --- /dev/null +++ b/graph/find_all_cliques.py @@ -0,0 +1,35 @@ +# takes dict of sets +# each key is a vertex +# value is set of all edges connected to vertex +# returns list of lists (each sub list is a maximal clique) +# implementation of the basic algorithm described in: +# Bron, Coen; Kerbosch, Joep (1973), "Algorithm 457: finding all cliques of an undirected graph", + + +def find_all_cliques(edges): + def expand_clique(candidates, nays): + nonlocal compsub + if not candidates and not nays: + nonlocal solutions + solutions.append(compsub.copy()) + else: + for selected in candidates.copy(): + candidates.remove(selected) + candidates_temp = get_connected(selected, candidates) + nays_temp = get_connected(selected, nays) + compsub.append(selected) + expand_clique(candidates_temp, nays_temp) + nays.add(compsub.pop()) + + def get_connected(vertex, old_set): + newSet = set() + for neighbor in edges[str(vertex)]: + if neighbor in old_set: + newSet.add(neighbor) + return newSet + + compsub = [] + solutions = [] + possibles = set(edges.keys()) + expand_clique(possibles, set()) + return solutions From a5d6551e3affaf1791009cec2f9f4dce47dd92a8 Mon Sep 17 00:00:00 2001 From: Will Shanks <92five@gmail.com> Date: Tue, 31 Oct 2017 22:01:49 -0600 Subject: [PATCH 019/387] fixed pep8 --- graph/find_all_cliques.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/graph/find_all_cliques.py b/graph/find_all_cliques.py index 7d693f0b5..10f7a24eb 100644 --- a/graph/find_all_cliques.py +++ b/graph/find_all_cliques.py @@ -22,11 +22,11 @@ def expand_clique(candidates, nays): nays.add(compsub.pop()) def get_connected(vertex, old_set): - newSet = set() + new_set = set() for neighbor in edges[str(vertex)]: if neighbor in old_set: - newSet.add(neighbor) - return newSet + new_set.add(neighbor) + return new_set compsub = [] solutions = [] From 93eab6157b09b6af3539b83ae97eaaeabbba7609 Mon Sep 17 00:00:00 2001 From: mondeja Date: Thu, 2 Nov 2017 19:39:12 +0100 Subject: [PATCH 020/387] Optimized code, faster If we store in memory len(list) we can run this algorithm too much faster. --- array/circular_counter.py | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/array/circular_counter.py b/array/circular_counter.py index f0574f361..ac33cfc32 100644 --- a/array/circular_counter.py +++ b/array/circular_counter.py @@ -14,9 +14,11 @@ def josepheus(int_list, skip): skip = skip - 1 #list starts with 0 index idx = 0 - while len(int_list)>0: + len_list(len(int_list)) + while len_list>0: idx = (skip+idx)%len(int_list) #hashing to keep changing the index to every 3rd print(int_list.pop(idx)) + len_list -= 1 josepheus(a,3) From fb2702a2e524dfeda456bd13de842cab9123e4db Mon Sep 17 00:00:00 2001 From: mondeja Date: Thu, 2 Nov 2017 20:34:45 +0100 Subject: [PATCH 021/387] Circular counter algorithm optimized --- array/circular_counter.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/array/circular_counter.py b/array/circular_counter.py index ac33cfc32..1fea4f688 100644 --- a/array/circular_counter.py +++ b/array/circular_counter.py @@ -14,9 +14,9 @@ def josepheus(int_list, skip): skip = skip - 1 #list starts with 0 index idx = 0 - len_list(len(int_list)) + len_list = (len(int_list)) while len_list>0: - idx = (skip+idx)%len(int_list) #hashing to keep changing the index to every 3rd + idx = (skip+idx)%len_list #hashing to keep changing the index to every 3rd print(int_list.pop(idx)) len_list -= 1 From 6683188f226058b3784550c4617cc36e4f455f83 Mon Sep 17 00:00:00 2001 From: plus7wist Date: Fri, 17 Nov 2017 18:16:50 +0800 Subject: [PATCH 022/387] implement --- matrix/sparse_dot_vector.py | 67 ++++++++++++++++++++++++++++++++++--- 1 file changed, 63 insertions(+), 4 deletions(-) diff --git a/matrix/sparse_dot_vector.py b/matrix/sparse_dot_vector.py index 0cfceda7b..19053ec58 100644 --- a/matrix/sparse_dot_vector.py +++ b/matrix/sparse_dot_vector.py @@ -1,12 +1,71 @@ +#! /usr/bin/env python3 + """ Suppose we have very large sparse vectors, which contains a lot of zeros and double . find a data structure to store them get the dot product of them +""" -In this case, we first have to store the sparse vector using hash map. -for example [3,0,0,5,6] -> (0,3) (3,5) (4,6) The key is each element's position and the value is the number. +def vector_to_index_value_list(vector): + return [(i, v) for i, v in enumerate(vector) if v != 0.0] -Then we have two hash tables, and we have to iterate through them to calculate the dot product -""" + +def dot_product(iv_list1, iv_list2): + + product = 0 + p1 = len(iv_list1) - 1 + p2 = len(iv_list2) - 1 + + while p1 >= 0 and p2 >= 0: + i1, v1 = iv_list1[p1] + i2, v2 = iv_list2[p2] + + if i1 < i2: + p1 -= 1 + elif i2 < i1: + p2 -= 1 + else: + product += v1 * v2 + p1 -= 1 + p2 -= 1 + + return product + + +def __test_simple(): + print(dot_product(vector_to_index_value_list([1., 2., 3.]), + vector_to_index_value_list([0., 2., 2.]))) + # 10 + + +def __test_time(): + vector_length = 1024 + vector_count = 1024 + nozero_counut = 10 + + def random_vector(): + import random + vector = [0 for _ in range(vector_length)] + for i in random.sample(range(vector_length), nozero_counut): + vector[i] = random.random() + return vector + + vectors = [random_vector() for _ in range(vector_count)] + iv_lists = [vector_to_index_value_list(vector) for vector in vectors] + + import time + + time_start = time.time() + for i in range(vector_count): + for j in range(i): + dot_product(iv_lists[i], iv_lists[j]) + time_end = time.time() + + print(time_end - time_start, 'seconds') + + +if __name__ == '__main__': + __test_simple() + __test_time() From 8a1897e7099ea2ee0113ebd3eca866cdacd8e27e Mon Sep 17 00:00:00 2001 From: plus7wist Date: Fri, 17 Nov 2017 21:45:24 +0800 Subject: [PATCH 023/387] implement --- set/randomized_set.py | 66 +++++++++++++++++++++++++++++++------------ 1 file changed, 48 insertions(+), 18 deletions(-) diff --git a/set/randomized_set.py b/set/randomized_set.py index 5f66c90b8..53f2b5af4 100644 --- a/set/randomized_set.py +++ b/set/randomized_set.py @@ -1,40 +1,70 @@ +#! /usr/bin/env python3 + """ Design a data structure that supports all following operations in average O(1) time. insert(val): Inserts an item val to the set if not already present. remove(val): Removes an item val from the set if present. -get_random: Returns a random element from current set of elements. +random_element: Returns a random element from current set of elements. Each element must have the same probability of being returned. """ +import random + class RandomizedSet(): """ - idea: - shit + idea: shoot """ + def __init__(self): - pass + self.elements = [] + self.index_map = {} # element -> index - def insert(self, val): - pass + def insert(self, new_one): + if new_one in self.index_map: + return + self.index_map[new_one] = len(self.elements) + self.elements.append(new_one) - def remove(self, val): - pass + def remove(self, old_one): + if not old_one in self.index_map: + return + index = self.index_map[old_one] + last = self.elements.pop() + self.index_map.pop(old_one) + if index == len(self.elements): + return + self.elements[index] = last + self.index_map[last] = index - def get_random(self): - pass + def random_element(self): + return random.choice(self.elements) -if __name__ == "__main__": +def __test(): rset = RandomizedSet() - rset.insert(1) - rset.insert(2) - rset.insert(3) + ground_truth = set() + n = 64 + + for i in range(n): + rset.insert(i) + ground_truth.add(i) - rset.remove(2) + # Remove a half + for i in random.sample(range(n), n // 2): + rset.remove(i) + ground_truth.remove(i) - print(rset.get_random()) - print(rset.get_random()) - print(rset.get_random()) + print(len(ground_truth), len(rset.elements), len(rset.index_map)) + for i in ground_truth: + assert(i == rset.elements[rset.index_map[i]]) + + for i in range(n): + print(rset.random_element(), end=' ') + print() + + +if __name__ == "__main__": + __test() From cd09723f59bdbe3778084081d1921359aa134217 Mon Sep 17 00:00:00 2001 From: Thomas Ashish Cherian <6967017+PandaWhoCodes@users.noreply.github.com> Date: Fri, 17 Nov 2017 21:28:11 +0530 Subject: [PATCH 024/387] added transitive closure of a graph Added program to print transitive closure of a graph --- graph/Transitive_Closure_DFS.py | 52 +++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 graph/Transitive_Closure_DFS.py diff --git a/graph/Transitive_Closure_DFS.py b/graph/Transitive_Closure_DFS.py new file mode 100644 index 000000000..7b6a11be8 --- /dev/null +++ b/graph/Transitive_Closure_DFS.py @@ -0,0 +1,52 @@ +# Python program to print transitive closure of a graph +# This class represents a directed graph using adjacency +# list representation +class Graph: + + def __init__(self,vertices): + # No. of vertices + self.V= vertices + + # default dictionary to store graph + self.graph= defaultdict(list) + + # To store transitive closure + self.tc = [[0 for j in range(self.V)] for i in range(self.V)] + + # function to add an edge to graph + def addEdge(self,u,v): + self.graph[u].append(v) + + # A recursive DFS traversal function that finds + # all reachable vertices for s + def DFSUtil(self,s,v): + + # Mark reachability from s to v as true. + self.tc[s][v] = 1 + + # Find all the vertices reachable through v + for i in self.graph[v]: + if self.tc[s][i]==0: + self.DFSUtil(s,i) + + # The function to find transitive closure. It uses + # recursive DFSUtil() + def transitiveClosure(self): + + # Call the recursive helper function to print DFS + # traversal starting from all vertices one by one + for i in range(self.V): + self.DFSUtil(i, i) + print self.tc + +# Create a graph given in the above diagram +g = Graph(4) +g.addEdge(0, 1) +g.addEdge(0, 2) +g.addEdge(1, 2) +g.addEdge(2, 0) +g.addEdge(2, 3) +g.addEdge(3, 3) + +print("Transitive closure matrix is") +g.transitiveClosure() From 40749cc3e1ac3efccc0d447303cd904666ad0436 Mon Sep 17 00:00:00 2001 From: Thomas Ashish Cherian <6967017+PandaWhoCodes@users.noreply.github.com> Date: Fri, 17 Nov 2017 21:32:51 +0530 Subject: [PATCH 025/387] Update Transitive_Closure_DFS.py Fixed Transitive Closure DFS --- graph/Transitive_Closure_DFS.py | 45 +++++++++++++++++---------------- 1 file changed, 23 insertions(+), 22 deletions(-) diff --git a/graph/Transitive_Closure_DFS.py b/graph/Transitive_Closure_DFS.py index 7b6a11be8..33ddced6c 100644 --- a/graph/Transitive_Closure_DFS.py +++ b/graph/Transitive_Closure_DFS.py @@ -1,44 +1,45 @@ -# Python program to print transitive closure of a graph # This class represents a directed graph using adjacency -# list representation class Graph: - - def __init__(self,vertices): + def __init__(self, vertices): # No. of vertices - self.V= vertices - + self.V = vertices + # default dictionary to store graph - self.graph= defaultdict(list) - + self.graph = {} + # To store transitive closure self.tc = [[0 for j in range(self.V)] for i in range(self.V)] - + # function to add an edge to graph - def addEdge(self,u,v): - self.graph[u].append(v) - + def addEdge(self, u, v): + if u in self.graph: + self.graph[u].append(v) + else: + self.graph[u]=[v] + # A recursive DFS traversal function that finds # all reachable vertices for s - def DFSUtil(self,s,v): - + def DFSUtil(self, s, v): + # Mark reachability from s to v as true. self.tc[s][v] = 1 - + # Find all the vertices reachable through v for i in self.graph[v]: - if self.tc[s][i]==0: - self.DFSUtil(s,i) - + if self.tc[s][i] == 0: + self.DFSUtil(s, i) + # The function to find transitive closure. It uses # recursive DFSUtil() def transitiveClosure(self): - + # Call the recursive helper function to print DFS # traversal starting from all vertices one by one for i in range(self.V): self.DFSUtil(i, i) - print self.tc - + print(self.tc) + + # Create a graph given in the above diagram g = Graph(4) g.addEdge(0, 1) @@ -47,6 +48,6 @@ def transitiveClosure(self): g.addEdge(2, 0) g.addEdge(2, 3) g.addEdge(3, 3) - + print("Transitive closure matrix is") g.transitiveClosure() From 985b843a89fe96eaf593d66b707a61ce39780d4e Mon Sep 17 00:00:00 2001 From: Thomas Ashish Cherian <6967017+PandaWhoCodes@users.noreply.github.com> Date: Fri, 17 Nov 2017 21:35:15 +0530 Subject: [PATCH 026/387] Update Transitive_Closure_DFS.py --- graph/Transitive_Closure_DFS.py | 1 - 1 file changed, 1 deletion(-) diff --git a/graph/Transitive_Closure_DFS.py b/graph/Transitive_Closure_DFS.py index 33ddced6c..8cd70881a 100644 --- a/graph/Transitive_Closure_DFS.py +++ b/graph/Transitive_Closure_DFS.py @@ -40,7 +40,6 @@ def transitiveClosure(self): print(self.tc) -# Create a graph given in the above diagram g = Graph(4) g.addEdge(0, 1) g.addEdge(0, 2) From 028a083ce7fc7b1cb1333565c420c01f15765971 Mon Sep 17 00:00:00 2001 From: Thomas Ashish Cherian <6967017+PandaWhoCodes@users.noreply.github.com> Date: Fri, 17 Nov 2017 21:42:08 +0530 Subject: [PATCH 027/387] Update graph.py With addedge function to add edges to a directed graph --- graph/graph.py | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) diff --git a/graph/graph.py b/graph/graph.py index 3340226cc..1ce8a4bf3 100644 --- a/graph/graph.py +++ b/graph/graph.py @@ -1,3 +1,25 @@ class Graph: - def __init__(self, node, edges, source): - pass + def __init__(self, vertices): + # No. of vertices + self.V = vertices + + # default dictionary to store graph + self.graph = {} + + # To store transitive closure + self.tc = [[0 for j in range(self.V)] for i in range(self.V)] + + # function to add an edge to graph + def addEdge(self, u, v): + if u in self.graph: + self.graph[u].append(v) + else: + self.graph[u] = [v] + +g = Graph(4) +g.addEdge(0, 1) +g.addEdge(0, 2) +g.addEdge(1, 2) +g.addEdge(2, 0) +g.addEdge(2, 3) +g.addEdge(3, 3) From 8f78a4068ac29d47819fcba1656acb0d6fcaffaf Mon Sep 17 00:00:00 2001 From: dong-jy Date: Mon, 18 Dec 2017 18:12:16 +0800 Subject: [PATCH 028/387] Update breaking_bad.py --- string/breaking_bad.py | 91 +++++++++++++++++++----------------------- 1 file changed, 40 insertions(+), 51 deletions(-) diff --git a/string/breaking_bad.py b/string/breaking_bad.py index b3087c16a..1197e045c 100644 --- a/string/breaking_bad.py +++ b/string/breaking_bad.py @@ -1,87 +1,76 @@ """ -Given an api which returns an array of chemical names and an array of chemical -symbols, display the chemical names with their symbol surrounded by square -brackets: +Given an api which returns an array of words and an array of symbols, display +the word with their matched symbol surrounded by square brackets. -Ex: -Chemicals array: ['Amazon', 'Microsoft', 'Google'] -Symbols: ['I', 'Am', 'cro', 'Na', 'le', 'abc'] +If the word string matches more than one symbol, then choose the one with +longest length. (ex. 'Microsoft' matches 'i' and 'cro'): + +Example: +Words array: ['Amazon', 'Microsoft', 'Google'] +Symbols: ['i', 'Am', 'cro', 'Na', 'le', 'abc'] Output: [Am]azon, Mi[cro]soft, Goog[le] -If the chemical string matches more than one symbol, then choose the one with -longest length. (ex. 'Microsoft' matches 'i' and 'cro') - -My solution: +My solution(Wrong): (I sorted the symbols array in descending order of length and ran loop over -chemicals array to find a symbol match(using indexOf in javascript) which +words array to find a symbol match(using indexOf in javascript) which worked. But I didn't make it through the interview, I am guessing my solution was O(n^2) and they expected an efficient algorithm. - -note: -This approach didn't pass interview because it did wrong in conditions like: - -input: -chemicals = ['Amazon', 'Microsoft', 'Google'] -symbols = ['I', 'Am', 'cro', 'Na', 'le', 'abc', 'o'] # add 'o' here - -expected: -['[am]azon', 'mi[cro]soft', 'goog[le]'] - -exact output: +output: ['[Am]azon', 'Mi[cro]soft', 'Goog[le]', 'Amaz[o]n', 'Micr[o]s[o]ft', 'G[o][o]gle'] """ -chemicals = ['Amazon', 'Microsoft', 'Google'] -symbols = ['I', 'Am', 'cro', 'le', 'abc'] +words = ['Amazon', 'Microsoft', 'Google'] +symbols = ['i', 'Am', 'cro', 'le', 'abc'] -def match_symbol(chemicals, symbols): +def match_symbol(words, symbols): import re combined = [] for s in symbols: - for c in chemicals: + for c in words: r = re.search(s, c) if r: combined.append(re.sub(s, "[{}]".format(s), c)) return combined -print(match_symbol(chemicals, symbols)) +print(match_symbol(words, symbols)) """ -An improved version of above, get right output. - -symbols = ['I', 'Am', 'cro', 'Na', 'le', 'abc', 'o'] -words = ['Amazon', 'Microsoft', 'Google'] -print(match_symbol_1(symbols, words)) ->>> ['[Am]azon', 'Mi[cro]soft', 'Goog[le]'] - -O(mn) time -m = len(symbols), n = len(words) -Assuming re.findall(s, w) is O(1) time. +O(n * max(log(n), l)) time complexity +n = len(words), l = len of a word """ -def match_symbol_1(symbols, words): - import re - bracketed_list = [] - for w in words: - longest_match='' - for s in symbols: - matchs = re.findall(s, w) - for m in matchs: - longest_match = m if len(longest_match) < len(m) else longest_match - bracketed.append(re.sub(longest_match, '[{}]'.format(longest_match), w)) - return bracketed_list - +def match_symbol_1(words, symbols): + res = [] + # reversely sort the symbols according to their lengths. + symbols = sorted(symbols, key = lambda _: len(_), reverse = True) + for word in words: + for symbol in symbols: + word_replaced = '' + # once match, append the `word_replaced` to res, process next word + if word.find(symbol) != -1: + word_replaced = word.replace(symbol, '[' + symbol + ']') + res.append(word_replaced) + break + # if this word matches no symbol, append it. + if word_replaced == '': + res.append(word) + return res + +words = ['Amazon', 'Microsoft', 'Google', 'Facebook'] +symbols = ['i', 'Am', 'cro', 'Na', 'le', 'abc'] +print(match_symbol_1(words, symbols)) +# ['[Am]azon', 'Mi[cro]soft', 'Goog[le]', 'Facebook'] """ -One approach is to use a Trie for the dictionary (the symbols), and then match +Another approach is to use a Trie for the dictionary (the symbols), and then match brute force. The complexity will depend on the dictionary; if all are suffixes of the other, it will be n*m (where m is the size of the dictionary). For example, in Python: From 0364e56e8e5b55770d7478215eaaa6cfac21cd41 Mon Sep 17 00:00:00 2001 From: Eliot Pearson Date: Thu, 18 Jan 2018 10:46:49 -0500 Subject: [PATCH 029/387] This will close issue #199. --- heap/skyline.py | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/heap/skyline.py b/heap/skyline.py index b3ab5cc70..73fb6e899 100644 --- a/heap/skyline.py +++ b/heap/skyline.py @@ -1,3 +1,4 @@ +# -*- coding: utf-8 -*- """ A city's skyline is the outer contour of the silhouette formed by all the buildings in that city when viewed from a distance. @@ -62,5 +63,3 @@ def get_skyline(LRH): buildings = [ [2, 9, 10], [3, 7, 15], [5, 12, 12], [15, 20, 10], [19, 24, 8] ] # [ [2 10], [3 15], [7 12], [12 0], [15 10], [20 8], [24, 0] ] print(get_skyline(buildings)) - - From f74c83a045b7e4a05c8796896213a255c4aa546b Mon Sep 17 00:00:00 2001 From: swensun <1416316137@qq.com> Date: Tue, 30 Jan 2018 21:47:20 +0800 Subject: [PATCH 030/387] add readme_cn.md --- README_CN.md | 215 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 215 insertions(+) create mode 100644 README_CN.md diff --git a/README_CN.md b/README_CN.md new file mode 100644 index 000000000..e20677b48 --- /dev/null +++ b/README_CN.md @@ -0,0 +1,215 @@ + +[English](https://github.com/yunshuipiao/algorithms/blob/master/README.md) | 简体中文 + +Python版数据结构和算法 +========================================= + +python版数据结构和算法实现的简约版小示例 + + +## 实现列表 + +- [array:数组](array) + - [circular_counter：约瑟夫环](array/circular_counter.py) + - [flatten：数组降维](array/flatten.py) + - [garage：停车场](array/garage.py) + - [longest_non_repeat：最长不重复子串](array/longest_non_repeat.py/) + - [merge_intervals：合并重叠间隔](array/merge_intervals.py) + - [missing_ranges：遗失的范围](array/missing_ranges.py) + - [plus_one：加一运算](array/plus_one.py) + - [rotate_array：反转数组](array/rotate_array.py) + - [summary_ranges：数组范围](array/summary_ranges.py) + - [three_sum：三数和为零](array/three_sum.py) + - [two_sum：两数和](array/two_sum.py) +- [backtrack：回溯](backtrack) + - [general_solution.md：一般方法](backtrack/) + - [anagram：同字母异序词](backtrack/anagram.py) + - [array_sum_combinations：数组和](backtrack/array_sum_combination.py) + - [combination_sum：和的合并](backtrack/combination_sum.py) + - [expression_add_operators：给表达式添加运算符](backtrack/expression_add_operators.py) + - [factor_combinations：因素组合](backtrack/factor_combinations.py) + - [generate_abbreviations：缩写生成](backtrack/generate_abbreviations.py) + - [generate_parenthesis：插入生成](backtrack/generate_parenthesis.py) + - [letter_combination：字母组合](backtrack/letter_combination.py) + - [palindrome_partitioning：字符串的所有回文子串](backtrack/palindrome_partitioning.py) + - [pattern_match：模式匹配](backtrack/pattern_match.py) + - [permute：排列](backtrack/permute.py) + - [permute_unique：唯一排列](backtrack/permute_unique.py) + - [subsets：子集](backtrack/subsets.py) + - [subsets_unique：唯一子集](backtrack/subsets_unique.py) +- [bfs：广度优先搜索](bfs) + - [shortest_distance_from_all_buildings：所有建筑物的最短路径：](bfs/shortest_distance_from_all_buildings.py) + - [word_ladder：词语阶梯](bfs/word_ladder.py) +- [bit：位操作](bit) + - [bytes_int_conversion：字节整数转换](bit/bytes_int_conversion.py) + - [count_ones：统计1出现的次数](bit/count_ones.py) + - [find_missing_number：寻找缺失数](bit/find_missing_number.py) + - [power_of_two：2的n次方数判断](bit/power_of_two.py) + - [reverse_bits：反转位](bit/reverse_bits.py) + - [single_number2：寻找出现1次的数（2)](bit/single_number2.py) + - [single_number:寻找出现1次的数（1)](bit/single_number.py) + - [subsets: 求所有子集](bit/subsets.py) + - [add_without_operator：无操作符的加法](bit/add_without_operator.py) +- [calculator：计算](calculator) + - [math_parser: 数字解析](calculator/math_parser.py) +- [dfs：深度优先搜索](dfs) + - [all_factors：因素分解](dfs/all_factors.py) + - [count_islands：岛计数](dfs/count_islands.py) + - [pacific_atlantic：太平洋大西洋](dfs/pacific_atlantic.py) + - [sudoku_solver：数独解法](dfs/sudoku_solver.py) + - [walls_and_gates：墙和门](dfs/walls_and_gates.py) +- [dp：动态规划](dp) + - [buy_sell_stock：股票买卖](dp/buy_sell_stock.py) + - [climbing_stairs：爬梯子问题](dp/climbing_stairs.py) + - [combination_sum：和组合问题](dp/combination_sum.py) + - [house_robber：打家劫舍](dp/house_robber.py) + - [knapsack：背包问题](dp/knapsack.py) + - [longest_increasing：最长递增子序列](dp/longest_increasing.py) + - [max_product_subarray：最大子数组乘积](dp/max_product_subarray.py) + - [max_subarray：最大子数组](dp/max_subarray.py) + - [num_decodings：数字解码](dp/num_decodings.py) + - [regex_matching：正则匹配](dp/regex_matching.py) + - [word_break：单词分割](dp/word_break.py) +- [graph：图](graph) + - [2-sat：2-sat](graph/satisfiability.py) + - [clone_graph：克隆图](graph/clone_graph.py) + - [cycle_detection：判断圈算法](graph/cycle_detection.py) + - [find_path：发现路径](graph/find_path.py) + - [graph：图](graph/graph.py) + - [traversal：遍历](graph/traversal.py) + - [markov_chain：马尔可夫链](graph/markov_chain.py) +- [heap：堆](heap) + - [merge_sorted_k_lists：合并k个有序链](heap/merge_sorted_k_lists.py) + - [skyline：天际线](heap/skyline.py) + - [sliding_window_max：滑动窗口最大值](heap/sliding_window_max.py) +- [linkedlist：链表](linkedlist) + - [add_two_numbers：链表数相加](linkedlist/add_two_numbers.py) + - [copy_random_pointer：复制带有随机指针的链表](linkedlist/copy_random_pointer.py) + - [delete_node：删除节点](linkedlist/delete_node.py) + - [first_cyclic_node：环链表的第一个节点](linkedlist/first_cyclic_node.py) + - [is_cyclic：判断环链表](linkedlist/is_cyclic.py) + - [is_palindrome：回文链表](linkedlist/is_palindrome.py) + - [kth_to_last：倒数第k个节点](linkedlist/kth_to_last.py) + - [linkedlist： 链表](linkedlist/linkedlist.py) + - [remove_duplicates：删除重复元素](linkedlist/remove_duplicates.py) + - [reverse：反转链表](linkedlist/reverse.py) + - [rotate_list：旋转链表](linkedlist/rotate_list.py) + - [swap_in_pairs：链表节点交换](linkedlist/swap_in_pairs.py) +- [map：映射](map) + - [hashtable：哈希表](map/hashtable.py) + - [longest_common_subsequence：最长公共子序列](map/longest_common_subsequence.py) + - [randomized_set：随机集](map/randomized_set.py) + - [valid_sudoku：有效数独](map/valid_sudoku.py) +- [math：数学问题](math) + - [extended_gcd：扩展欧几里得算法](math/extended_gcd.py) + - [gcd/lcm：最大公约数和最小公倍数](math/gcd.py) + - [prime_test：主要测试](math/prime_test.py) + - [primes_sieve_of_eratosthenes：埃拉托色尼的质数筛](math/primes_sieve_of_eratosthenes.py) + - [generate_strobogrammtic：生成对称数](math/generate_strobogrammtic.py) + - [is_strobogrammatic：判断对称数](math/is_strobogrammatic.py) + - [nth_digit：第n位](math/nth_digit.py) + - [rabin_miller：米勒-拉宾素性检验](math/rabin_miller.py) + - [rsa：rsa加密](math/rsa.py) + - [sqrt_precision_factor：开发精度因素](math/sqrt_precision_factor.py) + - [pythagoras：毕达哥拉斯](math/pythagoras.py) +- [matrix：矩阵](matrix) + - [matrix_rotation：矩阵旋转](matrix/matrix_rotation.txt) + - [copy_transform：复制变换](matrix/copy_transform.py) + - [bomb_enemy：炸弹人](matrix/bomb_enemy.py) + - [rotate_image：旋转图像](matrix/rotate_image.py) + - [sparse_dot_vector：解析点向量](matrix/sparse_dot_vector.py) + - [sparse_mul：稀疏矩阵](matrix/sparse_mul.py) + - [spiral_traversal：循环遍历](matrix/spiral_traversal.py) + - [count_paths：计算路径](matrix/count_paths.py) +- [queue：队列](queue) + - [max_sliding_window：最大移动窗口](queue/max_sliding_window.py) + - [moving_average：移动平均](queue/moving_average.py) + - [queue：队列](queue/queue.py) + - [reconstruct_queue：重建队列](queue/reconstruct_queue.py) + - [zigzagiterator：锯齿形迭代](queue/zigzagiterator.py) +- [search：查找](search) + - [binary_search：二分查找](search/binary_search.py) + - [count_elem：元素计数](search/count_elem.py) + - [first_occurance：首次出现](search/first_occurance.py) + - [last_occurance：最后一次出现](search/last_occurance.py) +- [set：集合](set) + - [randomized_set：随机集合](set/randomized_set.py) + - [set_covering：集合覆盖](set/set_covering.py) +- [sort：排序](sort) + - [bubble_sort：冒泡排序](sort/bubble_sort.py) + - [comb_sort：梳排序](sort/comb_sort.py) + - [counting_sort：计数排序](sort/counting_sort.py) + - [heap_sort：堆排序](sort/heap_sort.py) + - [insertion_sort：插入排序](sort/insertion_sort.py) + - [meeting_rooms：会议室](sort/meeting_rooms.py) + - [merge_sort：归并排序](sort/merge_sort.py) + - [quick_sort：快速排序](sort/quick_sort.py) + - [selection_sort：选择排序](sort/selection_sort.py) + - [sort_colors：颜色排序](sort/sort_colors.py) + - [topsort：top排序](sort/topsort.py) + - [wiggle_sort：摇摆排序](sort/wiggle_sort.py) +- [stack：栈](stack) + - [longest_abs_path：最长相对路径](stack/longest_abs_path.py) + - [simplify_path：简化路径](stack/simplify_path.py) + - [stack：栈](stack/stack.py) + - [valid_parenthesis：验证括号](stack/valid_parenthesis.py) +- [string：字符串](string) + - [add_binary：二进制数相加](string/add_binary.py) + - [breaking_bad：打破坏](string/breaking_bad.py) + - [decode_string：字符串编码](string/decode_string.py) + - [encode_decode：编解码](string/encode_decode.py) + - [group_anagrams：群组错位词](string/group_anagrams.py) + - [int_to_roman：整数转换罗马数字](string/int_to_roman.py) + - [is_palindrome：回文字符串](string/is_palindrome.py) + - [license_number：拍照号码](string/license_number.py) + - [make_sentence：造句](string/make_sentence.py) + - [multiply_strings：字符串相乘](string/multiply_strings.py) + - [one_edit_distance：一个编辑距离](string/one_edit_distance.py) + - [rabin_karp：Rabin-Karp 算法](string/rabin_karp.py) + - [reverse_string：反转字符串](string/reverse_string.py) + - [reverse_vowel：反转元音](string/reverse_vowel.py) + - [reverse_words：反转单词](string/reverse_words.py) + - [roman_to_int：罗马数转换整数](string/roman_to_int.py) + - [word_squares：单词平方](string/word_squares.py) +- [tree：树](tree) + - [segment-tree：线段树](tree/Segment_Tree) + - [segment_tree：线段树](tree/Segment_Tree/segment_tree.py) + - [binary_tree_paths：二叉树路径](tree/binary_tree_paths.py) + - [bintree2list：二叉树转换链表](tree/bintree2list.py) + - [bst：二叉搜索树](tree/tree/bst) + - [array2bst：数组转换](tree/bst/array2bst.py) + - [bst_closest_value：最近二叉搜索树值](tree/bst/bst_closest_value.py) + - [BSTIterator：二叉搜索树迭代](tree/bst/BSTIterator.py) + - [delete_node：删除节点](tree/bst/delete_node.py) + - [is_bst：判断二叉搜索树](tree/bst/is_bst.py) + - [kth_smallest：二叉搜索树的第k小节点](tree/bst/kth_smallest.py) + - [lowest_common_ancestor：最近公共祖先](tree/bst/lowest_common_ancestor.py) + - [predecessor：前任](tree/bst/predecessor.py) + - [serialize_deserialize：序列化反序列化](tree/bst/serialize_deserialize.py) + - [successor：继承者](tree/bst/successor.py) + - [unique_bst：唯一BST](tree/bst/unique_bst.py) + - [deepest_left：最深叶子节点](tree/deepest_left.py) + - [invert_tree：反转树](tree/invert_tree.py) + - [is_balanced：判断平衡树](tree/is_balanced.py) + - [is_subtree：判断子树](tree/is_subtree.py) + - [is_symmetric：判断对称树](tree/is_symmetric.py) + - [longest_consecutive：最长连续节点](tree/longest_consecutive.py) + - [lowest_common_ancestor：最近公共祖先](tree/lowest_common_ancestor.py) + - [max_height：最大高度](tree/max_height.py) + - [max_path_sum：最长路径和](tree/max_path_sum.py) + - [min_height：最小高度](tree/min_height.py) + - [path_sum2：路径和2](tree/path_sum2.py) + - [path_sum：路径和](tree/path_sum.py) + - [pretty_print：完美打印](tree/pretty_print.py) + - [same_tree：相同树](tree/same_tree.py) + - [traversal：遍历](tree/traversal) + - [inorder：中序遍历](tree/traversal/inorder.py) + - [level_order：层次遍历](tree/traversal/level_order.py) + - [zigzag：锯齿形遍历](tree/traversal/zigzag.py) + - [tree：树](tree/tree.py) + - [trie：字典树](tree/trie) + - [add_and_search：添加和查找](tree/trie/add_and_search.py) + - [trie：字典](tree/trie/trie.py) +- [union-find：并查集](union-find) + - [count_islands：岛计数](union-find/count_islands.py) + From aadb2668ed2b8de5da21b4c0de4f76e1e3c315da Mon Sep 17 00:00:00 2001 From: sunwen <1416316137@qq.com> Date: Tue, 30 Jan 2018 21:49:28 +0800 Subject: [PATCH 031/387] Update README.md --- README.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/README.md b/README.md index 9b09e003b..0fd81d06d 100644 --- a/README.md +++ b/README.md @@ -1,3 +1,5 @@ +English | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) + Pythonic Data Structures and Algorithms ========================================= From 4e5f1d3c0738cc2e37ea93f81c77259d18788ec2 Mon Sep 17 00:00:00 2001 From: swensun <1416316137@qq.com> Date: Tue, 30 Jan 2018 21:57:49 +0800 Subject: [PATCH 032/387] add readme --- README.md | 2 +- README_CN.md | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 0fd81d06d..bc280dfbe 100644 --- a/README.md +++ b/README.md @@ -1,4 +1,4 @@ -English | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) +### English | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) Pythonic Data Structures and Algorithms ========================================= diff --git a/README_CN.md b/README_CN.md index e20677b48..413c5cdf2 100644 --- a/README_CN.md +++ b/README_CN.md @@ -1,5 +1,5 @@ -[English](https://github.com/yunshuipiao/algorithms/blob/master/README.md) | 简体中文 +### [English](https://github.com/yunshuipiao/algorithms/blob/master/README.md) | 简体中文 Python版数据结构和算法 ========================================= From 263be6ff9439873ecfd49c79d3ac03336bb14057 Mon Sep 17 00:00:00 2001 From: swensun <1416316137@qq.com> Date: Thu, 1 Feb 2018 11:17:23 +0800 Subject: [PATCH 033/387] update longest_non_repeat --- array/longest_non_repeat.py | 40 ++++++++++++++++++++++++++----------- 1 file changed, 28 insertions(+), 12 deletions(-) diff --git a/array/longest_non_repeat.py b/array/longest_non_repeat.py index c5f6edb59..70a99e802 100644 --- a/array/longest_non_repeat.py +++ b/array/longest_non_repeat.py @@ -11,17 +11,33 @@ # Note that the answer must be a substring, # "pwke" is a subsequence and not a substring. -def longest_non_repeat(s): - start, maxlen = 0, 0 - used_char = {} - for i, char in enumerate(s): - if char in used_char and start <= used_char[char]: - start = used_char[char] + 1 +def longest_non_repeat(string): + if string is None: + return 0 + temp = [] + max_len = 0 + for i in string: + if i in temp: + temp = [] + temp.append(i) + max_len = max(max_len, len(temp)) + return max_len + +def longest_non_repeat_two(string): + if string is None: + return 0 + start, max_len = 0, 0 + user_char = {} + for index, char in enumerate(string): + if char in user_char and start <= user_char[char]: + start = user_char[char] + 1 else: - maxlen = max(maxlen, i-start+1) - used_char[char] = i - return maxlen + max_len = max(max_len, index - start + 1) + user_char[char] = index + return max_len -a = "abcabcdefbb" -print(a) -print(longest_non_repeat(a)) +if __name__ == '__main__': + a = "abcabcdefbb" + print(a) + print(longest_non_repeat(a)) + print(longest_non_repeat_two(a)) From dc778bc3d11c6b69f6039c0ddfd6ef735c43a05b Mon Sep 17 00:00:00 2001 From: swensun <1416316137@qq.com> Date: Thu, 1 Feb 2018 11:22:02 +0800 Subject: [PATCH 034/387] rename --- array/longest_non_repeat.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/array/longest_non_repeat.py b/array/longest_non_repeat.py index 70a99e802..ed2178bdb 100644 --- a/array/longest_non_repeat.py +++ b/array/longest_non_repeat.py @@ -27,13 +27,13 @@ def longest_non_repeat_two(string): if string is None: return 0 start, max_len = 0, 0 - user_char = {} + used_char = {} for index, char in enumerate(string): - if char in user_char and start <= user_char[char]: - start = user_char[char] + 1 + if char in used_char and start <= used_char[char]: + start = used_char[char] + 1 else: max_len = max(max_len, index - start + 1) - user_char[char] = index + used_char[char] = index return max_len if __name__ == '__main__': From 63ebe78ea6d2fabbcca60940181fda0aa1afdd00 Mon Sep 17 00:00:00 2001 From: swensun <1416316137@qq.com> Date: Thu, 1 Feb 2018 11:49:30 +0800 Subject: [PATCH 035/387] update merge_intervals --- array/merge_intervals.py | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/array/merge_intervals.py b/array/merge_intervals.py index 0d465e2d4..20ffbaaf1 100644 --- a/array/merge_intervals.py +++ b/array/merge_intervals.py @@ -31,6 +31,19 @@ def print_intervals(intervals): res.append('['+str(i.start)+','+str(i.end)+']') print("".join(res)) +def merge_intervals(l): + #sort + if l is None: + return None + l.sort(key=lambda i: i[0]) + out = [l.pop(0)] + for i in l: + if out[-1][-1] >= i[0]: + out[-1][-1] = i[-1] + else: + out.append(i) + return out + if __name__ == "__main__": given = [[1,3],[2,6],[8,10],[15,18]] intervals = [] @@ -38,3 +51,4 @@ def print_intervals(intervals): intervals.append(Interval(l,r)) print_intervals(intervals) print_intervals(merge(intervals)) + print(merge_intervals[given]) From b2532450b8592528418fd5ba3cd0a189abdbe399 Mon Sep 17 00:00:00 2001 From: swensun <1416316137@qq.com> Date: Thu, 1 Feb 2018 11:52:00 +0800 Subject: [PATCH 036/387] update merge_intervals --- array/merge_intervals.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/array/merge_intervals.py b/array/merge_intervals.py index 20ffbaaf1..0880c92aa 100644 --- a/array/merge_intervals.py +++ b/array/merge_intervals.py @@ -39,7 +39,7 @@ def merge_intervals(l): out = [l.pop(0)] for i in l: if out[-1][-1] >= i[0]: - out[-1][-1] = i[-1] + out[-1][-1] = max(out[-1][-1], i[-1]) else: out.append(i) return out From b8b0fd2841de86c7a885541166816a059c7321c8 Mon Sep 17 00:00:00 2001 From: swensun <1416316137@qq.com> Date: Thu, 1 Feb 2018 11:57:56 +0800 Subject: [PATCH 037/387] update readme --- README.md | 2 +- README_CN.md | 3 +-- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/README.md b/README.md index bc280dfbe..0fd81d06d 100644 --- a/README.md +++ b/README.md @@ -1,4 +1,4 @@ -### English | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) +English | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) Pythonic Data Structures and Algorithms ========================================= diff --git a/README_CN.md b/README_CN.md index 413c5cdf2..700f367d5 100644 --- a/README_CN.md +++ b/README_CN.md @@ -1,5 +1,4 @@ - -### [English](https://github.com/yunshuipiao/algorithms/blob/master/README.md) | 简体中文 +[English](https://github.com/yunshuipiao/algorithms/blob/master/README.md) | 简体中文 Python版数据结构和算法 ========================================= From 20db829985f172b8f676de844e5aa9ef87288d19 Mon Sep 17 00:00:00 2001 From: swensun <1416316137@qq.com> Date: Thu, 1 Feb 2018 16:09:55 +0800 Subject: [PATCH 038/387] update rotate_array --- array/rotate_array.py | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/array/rotate_array.py b/array/rotate_array.py index ecc3e900a..39c989814 100644 --- a/array/rotate_array.py +++ b/array/rotate_array.py @@ -50,3 +50,9 @@ def reverse(array, a, b): array[a], array[b] = array[b], array[a] a += 1 b -= 1 + +def rotate_array(array, k): + if array is None: + return None + length = len(array) + return array[length - k:] + array[:length - k] From 28391d4ae0bb4add93e74b0854dfa5188d87036c Mon Sep 17 00:00:00 2001 From: swensun <1416316137@qq.com> Date: Sat, 3 Feb 2018 16:05:03 +0800 Subject: [PATCH 039/387] update array_sum_combinations --- README.md | 2 +- README_CN.md | 4 +++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 0fd81d06d..4ea17af72 100644 --- a/README.md +++ b/README.md @@ -23,7 +23,7 @@ Minimal and clean example implementations of data structures and algorithms in P - [backtrack](backtrack) - [general_solution.md](backtrack/) - [anagram](backtrack/anagram.py) - - [array_sum_combinations](backtrack/array_sum_combination.py) + - [array_sum_combinations](backtrack/array_sum_combinations.py) - [combination_sum](backtrack/combination_sum.py) - [expression_add_operators](backtrack/expression_add_operators.py) - [factor_combinations](backtrack/factor_combinations.py) diff --git a/README_CN.md b/README_CN.md index 700f367d5..7e806eec8 100644 --- a/README_CN.md +++ b/README_CN.md @@ -23,7 +23,7 @@ python版数据结构和算法实现的简约版小示例 - [backtrack：回溯](backtrack) - [general_solution.md：一般方法](backtrack/) - [anagram：同字母异序词](backtrack/anagram.py) - - [array_sum_combinations：数组和](backtrack/array_sum_combination.py) + - [array_sum_combinations：数组和](backtrack/array_sum_combinations.py) - [combination_sum：和的合并](backtrack/combination_sum.py) - [expression_add_operators：给表达式添加运算符](backtrack/expression_add_operators.py) - [factor_combinations：因素组合](backtrack/factor_combinations.py) @@ -212,3 +212,5 @@ python版数据结构和算法实现的简约版小示例 - [union-find：并查集](union-find) - [count_islands：岛计数](union-find/count_islands.py) +[或者可以用不同语言来完成上述算法，期待加入](https://github.com/yunshuipiao/sw-algorithms) + From 0c8fcce3dad293731f6c816f421133a16732b6a8 Mon Sep 17 00:00:00 2001 From: swensun <1416316137@qq.com> Date: Sun, 4 Feb 2018 13:27:08 +0800 Subject: [PATCH 040/387] fix factor_combinations --- backtrack/factor_combinations.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/backtrack/factor_combinations.py b/backtrack/factor_combinations.py index 787c1cf25..de02b4cef 100644 --- a/backtrack/factor_combinations.py +++ b/backtrack/factor_combinations.py @@ -42,8 +42,8 @@ def getFactors(self, n): n, i, combi = todo.pop() while i * i <= n: if n % i == 0: - combis += combi + [i, n/i], - todo += (n/i, i, combi+[i]), + combis.append(combi + [i, n/i]), + todo.append(n/i, i, combi+[i]), i += 1 return combis @@ -53,7 +53,7 @@ def getFactors(self, n): def factor(n, i, combi, combis): while i * i <= n: if n % i == 0: - combis += combi + [i, n/i], + combis.append(combi + [i, n/i]), factor(n/i, i, combi+[i], combis) i += 1 return combis From 8edbd3558a2c330491ba73c27856d613ac4b7ed2 Mon Sep 17 00:00:00 2001 From: Ankit Agarwal Date: Sun, 4 Feb 2018 22:17:33 +0530 Subject: [PATCH 041/387] Revert " update array_sum_combinations and readme" --- README.md | 2 +- README_CN.md | 4 +--- backtrack/factor_combinations.py | 6 +++--- 3 files changed, 5 insertions(+), 7 deletions(-) diff --git a/README.md b/README.md index 4ea17af72..0fd81d06d 100644 --- a/README.md +++ b/README.md @@ -23,7 +23,7 @@ Minimal and clean example implementations of data structures and algorithms in P - [backtrack](backtrack) - [general_solution.md](backtrack/) - [anagram](backtrack/anagram.py) - - [array_sum_combinations](backtrack/array_sum_combinations.py) + - [array_sum_combinations](backtrack/array_sum_combination.py) - [combination_sum](backtrack/combination_sum.py) - [expression_add_operators](backtrack/expression_add_operators.py) - [factor_combinations](backtrack/factor_combinations.py) diff --git a/README_CN.md b/README_CN.md index 7e806eec8..700f367d5 100644 --- a/README_CN.md +++ b/README_CN.md @@ -23,7 +23,7 @@ python版数据结构和算法实现的简约版小示例 - [backtrack：回溯](backtrack) - [general_solution.md：一般方法](backtrack/) - [anagram：同字母异序词](backtrack/anagram.py) - - [array_sum_combinations：数组和](backtrack/array_sum_combinations.py) + - [array_sum_combinations：数组和](backtrack/array_sum_combination.py) - [combination_sum：和的合并](backtrack/combination_sum.py) - [expression_add_operators：给表达式添加运算符](backtrack/expression_add_operators.py) - [factor_combinations：因素组合](backtrack/factor_combinations.py) @@ -212,5 +212,3 @@ python版数据结构和算法实现的简约版小示例 - [union-find：并查集](union-find) - [count_islands：岛计数](union-find/count_islands.py) -[或者可以用不同语言来完成上述算法，期待加入](https://github.com/yunshuipiao/sw-algorithms) - diff --git a/backtrack/factor_combinations.py b/backtrack/factor_combinations.py index de02b4cef..787c1cf25 100644 --- a/backtrack/factor_combinations.py +++ b/backtrack/factor_combinations.py @@ -42,8 +42,8 @@ def getFactors(self, n): n, i, combi = todo.pop() while i * i <= n: if n % i == 0: - combis.append(combi + [i, n/i]), - todo.append(n/i, i, combi+[i]), + combis += combi + [i, n/i], + todo += (n/i, i, combi+[i]), i += 1 return combis @@ -53,7 +53,7 @@ def getFactors(self, n): def factor(n, i, combi, combis): while i * i <= n: if n % i == 0: - combis.append(combi + [i, n/i]), + combis += combi + [i, n/i], factor(n/i, i, combi+[i], combis) i += 1 return combis From 02cb0fec20ed5582aa3ee5b76392b8bf76ca3ada Mon Sep 17 00:00:00 2001 From: swensun <1416316137@qq.com> Date: Mon, 5 Feb 2018 09:34:50 +0800 Subject: [PATCH 042/387] fix factor_combinations --- backtrack/factor_combinations.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/backtrack/factor_combinations.py b/backtrack/factor_combinations.py index de02b4cef..0eb6fe147 100644 --- a/backtrack/factor_combinations.py +++ b/backtrack/factor_combinations.py @@ -43,7 +43,7 @@ def getFactors(self, n): while i * i <= n: if n % i == 0: combis.append(combi + [i, n/i]), - todo.append(n/i, i, combi+[i]), + todo.append( [n / i, i, combi+[i] ] ) # python3: n // i i += 1 return combis From 315abd081ed8892087a3439f7c60694d41ad1391 Mon Sep 17 00:00:00 2001 From: swensun <1416316137@qq.com> Date: Mon, 5 Feb 2018 09:55:55 +0800 Subject: [PATCH 043/387] update readme --- README.md | 2 +- README_CN.md | 3 ++- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 0fd81d06d..4ea17af72 100644 --- a/README.md +++ b/README.md @@ -23,7 +23,7 @@ Minimal and clean example implementations of data structures and algorithms in P - [backtrack](backtrack) - [general_solution.md](backtrack/) - [anagram](backtrack/anagram.py) - - [array_sum_combinations](backtrack/array_sum_combination.py) + - [array_sum_combinations](backtrack/array_sum_combinations.py) - [combination_sum](backtrack/combination_sum.py) - [expression_add_operators](backtrack/expression_add_operators.py) - [factor_combinations](backtrack/factor_combinations.py) diff --git a/README_CN.md b/README_CN.md index 700f367d5..10930ea02 100644 --- a/README_CN.md +++ b/README_CN.md @@ -23,7 +23,7 @@ python版数据结构和算法实现的简约版小示例 - [backtrack：回溯](backtrack) - [general_solution.md：一般方法](backtrack/) - [anagram：同字母异序词](backtrack/anagram.py) - - [array_sum_combinations：数组和](backtrack/array_sum_combination.py) + - [array_sum_combinations：数组和](backtrack/array_sum_combinations.py) - [combination_sum：和的合并](backtrack/combination_sum.py) - [expression_add_operators：给表达式添加运算符](backtrack/expression_add_operators.py) - [factor_combinations：因素组合](backtrack/factor_combinations.py) @@ -211,4 +211,5 @@ python版数据结构和算法实现的简约版小示例 - [trie：字典](tree/trie/trie.py) - [union-find：并查集](union-find) - [count_islands：岛计数](union-find/count_islands.py) +- [或者可以用不同语言来完成上述算法，期待加入](https://github.com/yunshuipiao/sw-algorithms) From e33e49af354047e777b16e70012366288517709d Mon Sep 17 00:00:00 2001 From: Murilo Camargos Date: Thu, 8 Feb 2018 14:40:25 -0200 Subject: [PATCH 044/387] Add Tarjan's strongly connected component finder --- graph/tarjan.py | 153 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 153 insertions(+) create mode 100644 graph/tarjan.py diff --git a/graph/tarjan.py b/graph/tarjan.py new file mode 100644 index 000000000..ffeb3542f --- /dev/null +++ b/graph/tarjan.py @@ -0,0 +1,153 @@ +""" +Implements Tarjan's algorithm for finding strongly connected components +in a graph. +https://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm +""" + +class Node(object): + def __init__(self, name): + self.name = name + + def __eq__(self, obj): + if isinstance(obj, Node): + return obj.name == self.name + elif isinstance(obj, str): + return obj == self.name + return False + + def __repr__(self): + return self.name + + def __hash__(self): + return hash(self.name) + +class DirectedEdge(object): + def __init__(self, node_from, node_to): + self.nf = node_from + self.nt = node_to + + def __eq__(self, obj): + if isinstance(obj, DirectedEdge): + return obj.nf == self.nf and obj.nt == self.nt + return False + + def __repr__(self): + return '({0} -> {1})'.format(self.nf, self.nt) + +class DirectedGraph(object): + def __init__(self, load_dict={}): + self.nodes = [] + self.edges = [] + self.adjmt = {} + + if load_dict and type(load_dict) == dict: + for v in load_dict: + node_from = self.add_node(v) + self.adjmt[node_from] = [] + for w in load_dict[v]: + node_to = self.add_node(w) + self.adjmt[node_from].append(node_to) + self.add_edge(v, w) + + def add_node(self, node_name): + try: + return self.nodes[self.nodes.index(node_name)] + except ValueError: + node = Node(node_name) + self.nodes.append(node) + return node + + def add_edge(self, node_name_from, node_name_to): + try: + node_from = self.nodes[self.nodes.index(node_name_from)] + node_to = self.nodes[self.nodes.index(node_name_to)] + self.edges.append(DirectedEdge(node_from, node_to)) + except ValueError: + pass + + + + +INDEX = 0 +STACK = [] + +def strongconnect(graph, v, sccs): + global INDEX, STACK + # Set the depth index for v to the smallest unused index + v.index = INDEX + v.lowlink = INDEX + INDEX += 1 + STACK.append(v) + v.on_stack = True + + # Consider successors of v + for w in graph.adjmt[v]: + if w.index == None: + # Successor w has not yet been visited; recurse on it + strongconnect(graph, w, sccs) + v.lowlink = min(v.lowlink, w.lowlink) + elif w.on_stack: + # Successor w is in stack S and hence in the current SCC + # If w is not on stack, then (v, w) is a cross-edge in the DFS tree and must be ignored + # Note: The next line may look odd - but is correct. + # It says w.index not w.lowlink; that is deliberate and from the original paper + v.lowlink = min(v.lowlink, w.index) + + # If v is a root node, pop the stack and generate an SCC + if v.lowlink == v.index: + # start a new strongly connected component + scc = [] + while True: + w = STACK.pop() + w.on_stack = False + scc.append(w) + if w == v: + break + sccs.append(scc) + + +def tarjan(graph): + # Set all node index to None + for v in graph.nodes: + v.index = None + + sccs = [] + for v in graph.nodes: + if v.index == None: + strongconnect(graph, v, sccs) + + return sccs + + +if __name__ == '__main__': + # Graph from https://en.wikipedia.org/wiki/File:Scc.png + example = { + 'A': ['B'], + 'B': ['C', 'E', 'F'], + 'C': ['D', 'G'], + 'D': ['C', 'H'], + 'E': ['A', 'F'], + 'F': ['G'], + 'G': ['F'], + 'H': ['D', 'G'] + } + + g = DirectedGraph(example) + print(tarjan(g)) + + # Graph from https://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm#/media/File:Tarjan%27s_Algorithm_Animation.gif + example = { + 'A': ['E'], + 'B': ['A'], + 'C': ['B', 'D'], + 'D': ['C'], + 'E': ['B'], + 'F': ['B', 'E', 'G'], + 'G': ['F', 'C'], + 'H': ['G', 'H', 'D'] + } + + g = DirectedGraph(example) + print(tarjan(g)) + + \ No newline at end of file From 68785f8b03e24bd4bef225e85fdd6412982c3706 Mon Sep 17 00:00:00 2001 From: Murilo Camargos Date: Thu, 8 Feb 2018 15:15:19 -0200 Subject: [PATCH 045/387] Change README to include tarjan --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index 4ea17af72..94bcc0a44 100644 --- a/README.md +++ b/README.md @@ -77,6 +77,7 @@ Minimal and clean example implementations of data structures and algorithms in P - [graph](graph/graph.py) - [traversal](graph/traversal.py) - [markov_chain](graph/markov_chain.py) + - [tarjan](graph/tarjan.py) - [heap](heap) - [merge_sorted_k_lists](heap/merge_sorted_k_lists.py) - [skyline](heap/skyline.py) From e491abc30b2bb3c291374ec385d501c169e663a8 Mon Sep 17 00:00:00 2001 From: Rahul Goswami <30523092+goswami-rahul@users.noreply.github.com> Date: Sat, 24 Feb 2018 18:47:55 +0000 Subject: [PATCH 046/387] Update flatten.py Now flatten() works for all the iterables (i.e. lists, tuples, sets, etc.) inside the array. --- array/flatten.py | 48 +++++++++--------------------------------------- 1 file changed, 9 insertions(+), 39 deletions(-) diff --git a/array/flatten.py b/array/flatten.py index 8ca86b7cb..f5466a3b4 100644 --- a/array/flatten.py +++ b/array/flatten.py @@ -12,45 +12,15 @@ flatten(input); Output: [2, 1, 3, 4, 5, 6, 7, 8] """ +import collections -def list_flatten(l, a=None): - a = list(a) if isinstance(a, (list, tuple)) else [] - for i in l: - if isinstance(i, (list, tuple)): - a = list_flatten(i, a) +def flatten(inputArr, outputArr=None): + if not outputArr: + outputArr = [] + for ele in inputArr: + if isinstance(ele, collections.Iterable): + flatten(ele, outputArr) else: - a.append(i) - return a - - -# stack version -# public static List flatten(List l) { -# List main = new ArrayList(); - # Stack> stack = new Stack>(); - # Stack indexes = new Stack(); - # stack.add(l); - # indexes.add(0); - # while (true) { - # if (stack.isEmpty()) - # break; - # int index1 = indexes.pop(); - # l = stack.pop(); - # for (int i = index1; i < l.size(); i++) { - # NestedList n = l.get(i); - # if (n.isInteger()) { - # main.add(n.value); - # } else { - # stack.add(l); - # indexes.add(i+1); - # l = n.list; - # stack.add(l); - # indexes.add(0); - # break; - - # } - # } - # } - - # return main; -# } + outputArr.append(ele) + return outputArr From cf8304420ef231d43954ae76579f0293ba7b4e5a Mon Sep 17 00:00:00 2001 From: Rahul Goswami <30523092+goswami-rahul@users.noreply.github.com> Date: Sat, 24 Feb 2018 19:17:56 +0000 Subject: [PATCH 047/387] update count_ones.py Complexity is better than the previous approach since number of loops is equal to the number of 1s in the binary representation. Also (n < 0) check is not needed since it is specified unsigned integer. --- bit/count_ones.py | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/bit/count_ones.py b/bit/count_ones.py index 4eb8c59b4..f9b0bea91 100644 --- a/bit/count_ones.py +++ b/bit/count_ones.py @@ -8,18 +8,18 @@ so the function should return 3. T(n)- O(log n) -""" - +Number of loops is +equal to the number of 1s in the binary representation.""" def count_ones(n): - """ - :type n: int - :rtype: int - """ - if n < 0: - return - counter = 0 + """Using Brian Kernighan’s Algorithm. (Recursive Approach)""" + if not n: return 0 + return 1 + count_ones(n & (n-1)) + +def countSetBits(n): + """Using Brian Kernighan’s Algorithm. (Iterative Approach)""" + count = 0 while n: - counter += n & 1 - n >>= 1 - return counter + n &= (n-1) + count += 1 + return count From 88d72cb2948616038960f8efe21dc6b847232d12 Mon Sep 17 00:00:00 2001 From: Rahul Goswami <30523092+goswami-rahul@users.noreply.github.com> Date: Sat, 24 Feb 2018 19:35:52 +0000 Subject: [PATCH 048/387] minor updates in merge_sorted_k_lists.py q.qsize()>0 ----> not q.empty() # is more verbose and pythonic ;) --- heap/merge_sorted_k_lists.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/heap/merge_sorted_k_lists.py b/heap/merge_sorted_k_lists.py index 266b12321..13c53c3b9 100644 --- a/heap/merge_sorted_k_lists.py +++ b/heap/merge_sorted_k_lists.py @@ -33,9 +33,9 @@ def merge_k_lists(lists): q = PriorityQueue() for node in lists: if node: q.put((node.val,node)) - while q.qsize()>0: - curr.next = q.get()[1] - curr=curr.next + while not q.empty(): + curr.next = q.get()[1] # These two lines seem to + curr=curr.next # be equivalent to :- curr = q.get()[1] if curr.next: q.put((curr.next.val, curr.next)) return dummy.next From 7bd7a8fd68f786250c1615ac2d8bed382cec370b Mon Sep 17 00:00:00 2001 From: Rahul Goswami <30523092+goswami-rahul@users.noreply.github.com> Date: Sat, 24 Feb 2018 19:43:45 +0000 Subject: [PATCH 049/387] Update math_parser.py Added support for exponents by using '^' symbol. --- calculator/math_parser.py | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/calculator/math_parser.py b/calculator/math_parser.py index 5c6dedd08..df488244e 100644 --- a/calculator/math_parser.py +++ b/calculator/math_parser.py @@ -14,6 +14,8 @@ | Parsed expression: ['2452', '*', '(', '3', '*', '6', '+', '1', ')', '*', '6', '/', '235'] | Evaluation result: 1189.4808510638297 ------------------------------------------------------------------------------------------------- + +Now added '^' operator for exponents. (by @goswami-rahul) """ from collections import deque @@ -21,13 +23,14 @@ numeric_value = re.compile('\d+(\.\d+)?') -__operators__ = "+-/*" +__operators__ = "+-/*^" __parenthesis__ = "()" __priority__ = { '+': 0, '-': 0, '*': 1, '/': 1, + '^': 2 } def is_operator(token): @@ -59,6 +62,7 @@ def calc(n2, n1, operator): elif operator == '+': return n1 + n2 elif operator == '*': return n1 * n2 elif operator == '/': return n1 / n2 + elif operator == '^': return n1 ** n2 return 0 def apply_operation(op_stack, out_stack): @@ -117,4 +121,4 @@ def evaluate(expression): while len(op_stack) > 0: apply_operation(op_stack, out_stack) - return out_stack[-1] \ No newline at end of file + return out_stack[-1] From 059fc34e0d342946341ef67f1b672d87757265a7 Mon Sep 17 00:00:00 2001 From: Rahul Goswami <30523092+goswami-rahul@users.noreply.github.com> Date: Sat, 24 Feb 2018 20:00:15 +0000 Subject: [PATCH 050/387] minor update rod_cut.py --- dp/rod_cut.py | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/dp/rod_cut.py b/dp/rod_cut.py index 48312b9c3..0272eeeee 100644 --- a/dp/rod_cut.py +++ b/dp/rod_cut.py @@ -3,9 +3,9 @@ # Returns the best obtainable price for a rod of length n and # price[] as prices of different pieces -def cutRod(price, n): - val = [0 for x in range(n+1)] - val[0] = 0 +def cutRod(price): + n = len(price) + val = [0]*(n+1) # Build the table val[] in bottom up manner and return # the last entry from the table @@ -19,7 +19,6 @@ def cutRod(price, n): # Driver program to test above functions arr = [1, 5, 8, 9, 10, 17, 17, 20] -size = len(arr) -print("Maximum Obtainable Value is " + str(cutRod(arr, size))) +print("Maximum Obtainable Value is " + str(cutRod(arr))) # This code is contributed by Bhavya Jain From 414c214870400808818c53540bc28504a8cd1514 Mon Sep 17 00:00:00 2001 From: Rahul Goswami <30523092+goswami-rahul@users.noreply.github.com> Date: Sat, 24 Feb 2018 20:14:18 +0000 Subject: [PATCH 051/387] update is_strobogrammatic.py Provided a simple, one-liner solution :) --- math/is_strobogrammatic.py | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/math/is_strobogrammatic.py b/math/is_strobogrammatic.py index e42e87980..773f3a388 100644 --- a/math/is_strobogrammatic.py +++ b/math/is_strobogrammatic.py @@ -24,3 +24,7 @@ def is_strobogrammatic(num): i += 1 j -= 1 return True + +def is_strobogrammatic(num: str): + """Another implementation.""" + return num == num[::-1].replace('6', '#').replace('9', '6').replace('#', '9') From 3b2f6af494f9d3eb183e6176261b75f9e48a883c Mon Sep 17 00:00:00 2001 From: Rahul Goswami <30523092+goswami-rahul@users.noreply.github.com> Date: Mon, 26 Feb 2018 14:07:26 +0530 Subject: [PATCH 052/387] Fixes #124 issue --- backtrack/factor_combinations.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/backtrack/factor_combinations.py b/backtrack/factor_combinations.py index 0eb6fe147..8bfbdce2d 100644 --- a/backtrack/factor_combinations.py +++ b/backtrack/factor_combinations.py @@ -42,8 +42,8 @@ def getFactors(self, n): n, i, combi = todo.pop() while i * i <= n: if n % i == 0: - combis.append(combi + [i, n/i]), - todo.append( [n / i, i, combi+[i] ] ) # python3: n // i + combis.append(combi + [i, n//i]), + todo.append( [n // i, i, combi+[i] ] ) # python3: n // i i += 1 return combis @@ -53,8 +53,8 @@ def getFactors(self, n): def factor(n, i, combi, combis): while i * i <= n: if n % i == 0: - combis.append(combi + [i, n/i]), - factor(n/i, i, combi+[i], combis) + combis.append(combi + [i, n//i]), + factor(n//i, i, combi+[i], combis) i += 1 return combis return factor(n, 2, [], []) From 79d19ab873f3916c4ff334b7d561b5b08256f79d Mon Sep 17 00:00:00 2001 From: Nisaruj Date: Thu, 1 Mar 2018 22:28:52 +0700 Subject: [PATCH 053/387] Add integer base conversion --- math/base_conversion.py | 50 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 math/base_conversion.py diff --git a/math/base_conversion.py b/math/base_conversion.py new file mode 100644 index 000000000..1ea31e3be --- /dev/null +++ b/math/base_conversion.py @@ -0,0 +1,50 @@ +""" +Integer base conversion algorithm + +int2base(5, 2) return '101'. +base2int('F', 16) return 15. + +""" + +import string + +def int2base(n, base): + """ + :type n: int + :type base: int + :rtype: str + """ + is_negative = False + if n == 0: + return '0' + elif n < 0: + is_negative = True + n *= -1 + digit = string.digits + string.ascii_uppercase + res = '' + while n > 0: + res += digit[n % base] + n //= base + if is_negative: + return '-' + res[::-1] + else: + return res[::-1] + + +def base2int(s, base): + """ + Note : You can use int() built-in function instread of this. + :type s: str + :type base: int + :rtype: int + """ + + digit = {} + for i,c in enumerate(string.digits + string.ascii_uppercase): + digit[c] = i + multiplier = 1 + res = 0 + for c in s[::-1]: + res += digit[c] * multiplier + multiplier *= base + return res From faf3253417b3f394650b454a98a9ef26b075968d Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Fri, 2 Mar 2018 00:13:50 +0530 Subject: [PATCH 054/387] Update count_ones.py --- bit/count_ones.py | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/bit/count_ones.py b/bit/count_ones.py index f9b0bea91..f9442db81 100644 --- a/bit/count_ones.py +++ b/bit/count_ones.py @@ -6,8 +6,12 @@ For example, the 32-bit integer ’11' has binary representation 00000000000000000000000000001011, so the function should return 3. + +T(n)- O(k) : k is the number of 1s present in binary representation. +NOTE: this complexity is better than O(log n). +e.g. for n = 00010100000000000000000000000000 +only 2 iterations are required. -T(n)- O(log n) Number of loops is equal to the number of 1s in the binary representation.""" @@ -16,7 +20,7 @@ def count_ones(n): if not n: return 0 return 1 + count_ones(n & (n-1)) -def countSetBits(n): +def count_ones(n): """Using Brian Kernighan’s Algorithm. (Iterative Approach)""" count = 0 while n: From 6c09c297f5f8a0d05be497b2ca5d74f966d0e0eb Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Fri, 2 Mar 2018 12:34:22 +0530 Subject: [PATCH 055/387] Fixes issue #137 --- array/merge_intervals.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/array/merge_intervals.py b/array/merge_intervals.py index 0880c92aa..ce227d06a 100644 --- a/array/merge_intervals.py +++ b/array/merge_intervals.py @@ -51,4 +51,4 @@ def merge_intervals(l): intervals.append(Interval(l,r)) print_intervals(intervals) print_intervals(merge(intervals)) - print(merge_intervals[given]) + print(merge_intervals(given)) From 04c93110e04405b15608aaaee7125918c5aeae6f Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Fri, 2 Mar 2018 12:46:15 +0530 Subject: [PATCH 056/387] used split() to seperate words. --- string/reverse_words.py | 30 ++++++++++++++++-------------- 1 file changed, 16 insertions(+), 14 deletions(-) diff --git a/string/reverse_words.py b/string/reverse_words.py index c1a48ace2..434285672 100644 --- a/string/reverse_words.py +++ b/string/reverse_words.py @@ -6,23 +6,25 @@ def reverse(array, i, j): j -= 1 def reverse_words(string): - arr = list(string) + arr = string.strip().split() # arr is list of words + n = len(arr) reverse(arr, 0, n-1) + return " ".join(arr) + + + + + + + + + + + + + - start = None - for i in range(n): - if arr[i] == " ": - if start is not None: - reverse(arr, start, i-1) - start = None - elif i == n-1: - if start is not None: - reverse(arr, start, i) - else: - if start is None: - start = i - return "".join(arr) if __name__ == "__main__": From 4f6c73253b250ef0b0154a08fabf99974ecbfcb0 Mon Sep 17 00:00:00 2001 From: Saad Date: Sun, 4 Mar 2018 19:37:50 -0600 Subject: [PATCH 057/387] Update prime_test.py Add a more concise way to check for primality. --- math/prime_test.py | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/math/prime_test.py b/math/prime_test.py index c3b795e4b..513b7ffbd 100644 --- a/math/prime_test.py +++ b/math/prime_test.py @@ -15,4 +15,22 @@ def prime_test(n): if n%(j)==0 or n%(j+2)==0: return False j += 6 - return True \ No newline at end of file + return True + + +def prime_test(n): + # prime numbers are greater than 1 + if num > 1: + # check for factors + for i in range(2,num): + if (num % i) == 0: + print(num,"is not a prime number") + print(i,"times",num//i,"is",num) + break + else: + print(num,"is a prime number") + + # if input number is less than + # or equal to 1, it is not prime + else: + print(num,"is not a prime number") From 820ddf412d09f10977b4bec525d478cc55fe443b Mon Sep 17 00:00:00 2001 From: Saad Date: Sun, 4 Mar 2018 19:43:35 -0600 Subject: [PATCH 058/387] Change the return type to boolean --- math/prime_test.py | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/math/prime_test.py b/math/prime_test.py index 513b7ffbd..c7b638610 100644 --- a/math/prime_test.py +++ b/math/prime_test.py @@ -24,13 +24,16 @@ def prime_test(n): # check for factors for i in range(2,num): if (num % i) == 0: - print(num,"is not a prime number") - print(i,"times",num//i,"is",num) + #print(num,"is not a prime number") + #print(i,"times",num//i,"is",num) + return False break else: - print(num,"is a prime number") + #print(num,"is a prime number") + return True # if input number is less than # or equal to 1, it is not prime else: - print(num,"is not a prime number") + #print(num,"is not a prime number") + return False From a40e096625e9efd086a4485ae15a6fd8fd8ce60c Mon Sep 17 00:00:00 2001 From: AmineAfia Date: Mon, 5 Mar 2018 12:43:34 +0100 Subject: [PATCH 059/387] Implemented linkedlist/first_cycle_node.py --- linkedlist/first_cyclic_node.py | 31 ++++++++++++++++++++++++++----- 1 file changed, 26 insertions(+), 5 deletions(-) diff --git a/linkedlist/first_cyclic_node.py b/linkedlist/first_cyclic_node.py index 48e66bc9e..07c09b4f3 100644 --- a/linkedlist/first_cyclic_node.py +++ b/linkedlist/first_cyclic_node.py @@ -1,8 +1,29 @@ -# find the first node of a cycle in the linked list. +""" + Given a linked list, find the first node of a cycle in it. + 1 -> 2 -> 3 -> 4 -> 5 -> 1 => 1 + A -> B -> C -> D -> E -> C => C -# 1 -> 2 -> 3 -> 4 -> 5 -> 1 => 1 -# A -> B -> C -> D -> E -> C => C + Note: The solution is a direct implementation + Floyd's cycle-finding algorithm (Floyd's Tortoise and Hare). +""" -def firstCyclicNode(): - pass +def firstCyclicNode(head): + """ + :type head: Node + :rtype: Node + """ + runner = walker = head + while runner and runner.next: + runner = runner.next.next + walker = walker.next + if runner is walker: + break + + if runner is None or runner.next is None: + return None + + walker = head + while runner is not walker: + runner, walker = runner.next, walker.next + return runner From b7cb32c7e668a65193d28abc556569cb2ae6784f Mon Sep 17 00:00:00 2001 From: Saad Date: Mon, 5 Mar 2018 09:08:14 -0600 Subject: [PATCH 060/387] Improve efficiency --- math/prime_test.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/math/prime_test.py b/math/prime_test.py index c7b638610..82b3cc84c 100644 --- a/math/prime_test.py +++ b/math/prime_test.py @@ -22,7 +22,7 @@ def prime_test(n): # prime numbers are greater than 1 if num > 1: # check for factors - for i in range(2,num): + for i in range(2, int(num ** 0.5) + 1): if (num % i) == 0: #print(num,"is not a prime number") #print(i,"times",num//i,"is",num) From f3b70c8aafe66fea8fd9dba355df4cc92c17bc84 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 5 Mar 2018 21:26:36 +0530 Subject: [PATCH 061/387] Update reverse_words.py --- string/reverse_words.py | 15 --------------- 1 file changed, 15 deletions(-) diff --git a/string/reverse_words.py b/string/reverse_words.py index 434285672..61fa55f2d 100644 --- a/string/reverse_words.py +++ b/string/reverse_words.py @@ -7,26 +7,11 @@ def reverse(array, i, j): def reverse_words(string): arr = string.strip().split() # arr is list of words - n = len(arr) reverse(arr, 0, n-1) return " ".join(arr) - - - - - - - - - - - - - - if __name__ == "__main__": test = "I am keon kim and I like pizza" print(test) From b5ba90295653853628ce204e842ed8adce0afbde Mon Sep 17 00:00:00 2001 From: Saad Date: Mon, 5 Mar 2018 09:57:02 -0600 Subject: [PATCH 062/387] Fix syntax error --- math/prime_test.py | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/math/prime_test.py b/math/prime_test.py index 82b3cc84c..bcde5cd1e 100644 --- a/math/prime_test.py +++ b/math/prime_test.py @@ -20,14 +20,14 @@ def prime_test(n): def prime_test(n): # prime numbers are greater than 1 - if num > 1: + if n > 1: # check for factors - for i in range(2, int(num ** 0.5) + 1): - if (num % i) == 0: + for i in range(2, int(n ** 0.5) + 1): + if (n % i) == 0: #print(num,"is not a prime number") #print(i,"times",num//i,"is",num) return False - break + break else: #print(num,"is a prime number") return True @@ -35,5 +35,4 @@ def prime_test(n): # if input number is less than # or equal to 1, it is not prime else: - #print(num,"is not a prime number") - return False + return False From a0ebea0755bdeabcc02eaf74aba5449d19795e8b Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 5 Mar 2018 22:08:10 +0530 Subject: [PATCH 063/387] garage.py now also prints the sequence of steps. Also fixed the bug where the function `garage()` reflects the changes in the original initial array passed to it by creating a copy of it inside the function. --- array/garage.py | 27 ++++++++++++++++++++++++--- 1 file changed, 24 insertions(+), 3 deletions(-) diff --git a/array/garage.py b/array/garage.py index 6d99f8d7c..a8ad7ae05 100644 --- a/array/garage.py +++ b/array/garage.py @@ -16,10 +16,26 @@ # We can swap 1 with 0 in the initial array to get [0,2,3,1,4] and so on. # Each step swap with 0 only. # Edited by cyberking-saga +""" +Now also prints the sequence of changes in states. +Output of this example :- + +initial: [1, 2, 3, 0, 4] +final: [0, 3, 2, 1, 4] +Steps = 4 +Sequence : +0 2 3 1 4 +2 0 3 1 4 +2 3 0 1 4 +0 3 2 1 4 + +""" def garage(initial, final): + initial = initial[::] # create a copy to prevent changes in original 'initial'. steps = 0 + seq = [] # list of each step in sequence while initial != final: zero = initial.index(0) if zero != final.index(0): @@ -31,12 +47,17 @@ def garage(initial, final): if initial[i] != final[i]: initial[zero], initial[i] = initial[i], initial[zero] break + seq.append(initial[::]) steps += 1 - return steps + seq = "\n".join(" ".join(map(str, s)) for s in seq) # convert to string + return steps, seq if __name__ == "__main__": initial = [1, 2, 3, 0, 4] final = [0, 3, 2, 1, 4] print("initial:", initial) - print("final:", final) - print(garage(initial, final)) + print("final: ", final) + steps, seq = garage(initial, final) + print("No. of Steps = ", steps) + print("Steps Sequence : ") + print(seq) From 4d7cb944c2d3d6496ac2c0fbb33da42db09296a2 Mon Sep 17 00:00:00 2001 From: Akash Chandra Date: Tue, 6 Mar 2018 13:58:47 +0530 Subject: [PATCH 064/387] added 2 files in graph/ (#105) merged 2 algorithms in graph/ --- graph/checkDiGraphStronglyConnected.py | 53 ++++++++++++++++++++++++ graph/pathBetweenTwoVerticesInDiGraph.py | 51 +++++++++++++++++++++++ 2 files changed, 104 insertions(+) create mode 100644 graph/checkDiGraphStronglyConnected.py create mode 100644 graph/pathBetweenTwoVerticesInDiGraph.py diff --git a/graph/checkDiGraphStronglyConnected.py b/graph/checkDiGraphStronglyConnected.py new file mode 100644 index 000000000..5ec8f510d --- /dev/null +++ b/graph/checkDiGraphStronglyConnected.py @@ -0,0 +1,53 @@ +from collections import defaultdict + +class Graph: + def __init__(self,v): + self.v = v; + self.graph = defaultdict(list) + + def add_edge(self,u,v): + self.graph[u].append(v) + + def dfs(self): + visited = [False] * self.v + self.dfs_util(0,visited) + if visited == [True]*self.v: + return True + return False + + def dfs_util(self,i,visited): + visited[i] = True + for u in self.graph[i]: + if not(visited[u]): + self.dfs_util(u,visited) + + def reverse_graph(self): + g = Graph(self.v) + for i in range(len(self.graph)): + for j in self.graph[i]: + g.add_edge(j,i) + return g + + + def is_sc(self): + if self.dfs(): + gr = self.reverse_graph() + if gr.dfs(): + return True + return False + + +g1 = Graph(5) +g1.add_edge(0, 1) +g1.add_edge(1, 2) +g1.add_edge(2, 3) +g1.add_edge(3, 0) +g1.add_edge(2, 4) +g1.add_edge(4, 2) +print ("Yes") if g1.is_sc() else print("No") + +g2 = Graph(4) +g2.add_edge(0, 1) +g2.add_edge(1, 2) +g2.add_edge(2, 3) +print ("Yes") if g2.is_sc() else print("No") diff --git a/graph/pathBetweenTwoVerticesInDiGraph.py b/graph/pathBetweenTwoVerticesInDiGraph.py new file mode 100644 index 000000000..ee6ac418f --- /dev/null +++ b/graph/pathBetweenTwoVerticesInDiGraph.py @@ -0,0 +1,51 @@ +from collections import defaultdict + +class Graph: + def __init__(self,v): + self.v = v + self.graph = defaultdict(list) + self.has_path = False + + def add_edge(self,u,v): + self.graph[u].append(v) + + def dfs(self,x,y): + visited = [False] * self.v + self.dfsutil(visited,x,y,) + + def dfsutil(self,visited,x,y): + visited[x] = True + for i in self.graph[x]: + if y in self.graph[x]: + self.has_path = True + return + if(not(visited[i])): + self.dfsutil(visited,x,i) + + def is_reachable(self,x,y): + self.has_path = False + self.dfs(x,y) + return self.has_path + + +# Create a graph given in the above diagram +g = Graph(4) +g.add_edge(0, 1) +g.add_edge(0, 2) +g.add_edge(1, 2) +g.add_edge(2, 0) +g.add_edge(2, 3) +g.add_edge(3, 3) + +u =1; v = 3 + +if g.is_reachable(u, v): + print("There is a path from %d to %d" % (u,v)) +else : + print("There is no path from %d to %d" % (u,v)) + +u = 3; v = 1 +if g.is_reachable(u, v) : + print("There is a path from %d to %d" % (u,v)) +else : + print("There is no path from %d to %d" % (u,v)) From c4ac47b6da3ead343b1f4ac280ebd23850d9a8c1 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 6 Mar 2018 16:01:10 +0530 Subject: [PATCH 065/387] created dp/min_cost_path.y (#143) * Create min_cost_path.py * Update min_cost_path.py * Update min_cost_path.py * Update min_cost_path.py * Update min_cost_path.py --- dp/min_cost_path.py | 49 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 dp/min_cost_path.py diff --git a/dp/min_cost_path.py b/dp/min_cost_path.py new file mode 100644 index 000000000..1b779f516 --- /dev/null +++ b/dp/min_cost_path.py @@ -0,0 +1,49 @@ +""" +author @goswami-rahul + +To find minimum cost path +from station 0 to station N-1, +where cost of moving from ith station to jth station is given as: + +Matrix of size (N x N) +where Matrix[i][j] denotes the cost of moving from +station i --> station j for i < j + +NOTE that values where Matrix[i][j] and i > j does not +mean anything, and hence represented by -1 or INF + +For the input below (cost matrix), +Minimum cost is obtained as from { 0 --> 1 --> 3} + = cost[0][1] + cost[1][3] = 65 +the Output will be: + +The Minimum cost to reach station 4 is 65 + +Time Complexity: O(n^2) +Space Complexity: O(n) +""" + +INF = float("inf") + +def min_cost(cost): + + N = len(cost) + # dist[i] stores minimum cost from 0 --> i. + dist = [INF] * N + + dist[0] = 0 # cost from 0 --> 0 is zero. + + for i in range(N): + for j in range(i+1,N): + dist[j] = min(dist[j], dist[i] + cost[i][j]) + + return dist[N-1] + +if __name__ == '__main__': + + cost = [ [ 0, 15, 80, 90], # cost[i][j] is the cost of + [-1, 0, 40, 50], # going from i --> j + [-1, -1, 0, 70], + [-1, -1, -1, 0] ] # cost[i][j] = -1 for i > j + N = len(cost) + print("The Minimum cost to reach station %d is %d" % (N, min_cost(cost))) From df631eee8c36df4b664c9cd7819dc21aa1ca5341 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 6 Mar 2018 20:17:19 +0530 Subject: [PATCH 066/387] PEP8 and Python 3 support --- backtrack/array_sum_combinations.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/backtrack/array_sum_combinations.py b/backtrack/array_sum_combinations.py index b267083d7..71aaaccc6 100644 --- a/backtrack/array_sum_combinations.py +++ b/backtrack/array_sum_combinations.py @@ -64,9 +64,9 @@ def backtrack(constructed_sofar): import itertools from functools import partial -A = [1,2,3,3] -B = [2,3,3,4] -C = [1,2,2,2] +A = [1, 2, 3, 3] +B = [2, 3, 3, 4] +C = [1, 2, 2, 2] S = 7 def check_sum(N, *nums): @@ -83,4 +83,4 @@ def check_sum(N, *nums): for s in sums: if s[0] == True and s[1] not in res: res.add(s[1]) -print res +print(res) From b0ae0f713808ae1f47f46504117b958db6833e05 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 6 Mar 2018 20:22:21 +0530 Subject: [PATCH 067/387] implemented dp/min_cost_path.py (#144) * Create min_cost_path.py * Update min_cost_path.py * Update min_cost_path.py * Update min_cost_path.py * Update min_cost_path.py * update dp/min_cost_path.py --- dp/min_cost_path.py | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/dp/min_cost_path.py b/dp/min_cost_path.py index 1b779f516..e346321fe 100644 --- a/dp/min_cost_path.py +++ b/dp/min_cost_path.py @@ -46,4 +46,8 @@ def min_cost(cost): [-1, -1, 0, 70], [-1, -1, -1, 0] ] # cost[i][j] = -1 for i > j N = len(cost) - print("The Minimum cost to reach station %d is %d" % (N, min_cost(cost))) + + mcost = min_cost(cost) + assert mcost == 65 + + print("The Minimum cost to reach station %d is %d" % (N, mcost)) From db997e8ab34fc3d9d2a7605280770979b7ac53b3 Mon Sep 17 00:00:00 2001 From: Shivam Gupta Date: Wed, 7 Mar 2018 00:47:54 +0530 Subject: [PATCH 068/387] MatrixChainOrder (#134) * MatrixChainOrder * changes * corrected --- dp/matrix_chain_order.py | 44 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 dp/matrix_chain_order.py diff --git a/dp/matrix_chain_order.py b/dp/matrix_chain_order.py new file mode 100644 index 000000000..2cd77b0d0 --- /dev/null +++ b/dp/matrix_chain_order.py @@ -0,0 +1,44 @@ +import sys +''' +Dynamic Programming +Implementation of Matrix Chain Multiplication +Time Complexity: O(n^3) +Space Complexity: O(n^2) +''' +def MatrixChainOrder(array): + N=len(array) + Matrix = [[0 for x in range(N)] for x in range(N)] + Sol = [[0 for x in range(N)] for x in range(N)] + for ChainLength in range(2,N): + for a in range(1,N-ChainLength+1): + b = a+ChainLength-1 + + Matrix[a][b] = sys.maxsize + for c in range(a, b): + cost = Matrix[a][c] + Matrix[c+1][b] + array[a-1]*array[c]*array[b] + if cost < Matrix[a][b]: + Matrix[a][b] = cost + Sol[a][b] = c + return Matrix , Sol +#Print order of matrix with Ai as Matrix + +def PrintOptimalSolution(OptimalSolution,i,j): + if i==j: + print("A" + str(i),end = " ") + else: + print("(",end = " ") + PrintOptimalSolution(OptimalSolution,i,OptimalSolution[i][j]) + PrintOptimalSolution(OptimalSolution,OptimalSolution[i][j]+1,j) + print(")",end = " ") + +def main(): + array=[30,35,15,5,10,20,25] + n=len(array) + #Size of matrix created from above array will be + # 30*35 35*15 15*5 5*10 10*20 20*25 + Matrix , OptimalSolution = MatrixChainOrder(array) + + print("No. of Operation required: "+str((Matrix[1][n-1]))) + PrintOptimalSolution(OptimalSolution,1,n-1) +if __name__ == '__main__': + main() From 25fbafbc6d62e5f052c8a199aec2e0e671ab89b3 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Wed, 7 Mar 2018 00:55:27 +0530 Subject: [PATCH 069/387] changed CamelCase to snake_case also removed `import sys`. defined infinity as ```python INF = float("inf") ``` --- dp/matrix_chain_order.py | 43 ++++++++++++++++++++-------------------- 1 file changed, 22 insertions(+), 21 deletions(-) diff --git a/dp/matrix_chain_order.py b/dp/matrix_chain_order.py index 2cd77b0d0..651079c15 100644 --- a/dp/matrix_chain_order.py +++ b/dp/matrix_chain_order.py @@ -1,34 +1,35 @@ -import sys ''' Dynamic Programming -Implementation of Matrix Chain Multiplication +Implementation of matrix Chain Multiplication Time Complexity: O(n^3) Space Complexity: O(n^2) ''' -def MatrixChainOrder(array): +INF = float("inf") + +def matrix_chain_order(array): N=len(array) - Matrix = [[0 for x in range(N)] for x in range(N)] - Sol = [[0 for x in range(N)] for x in range(N)] - for ChainLength in range(2,N): - for a in range(1,N-ChainLength+1): - b = a+ChainLength-1 + matrix = [[0 for x in range(N)] for x in range(N)] + sol = [[0 for x in range(N)] for x in range(N)] + for chain_length in range(2,N): + for a in range(1,N-chain_length+1): + b = a+chain_length-1 - Matrix[a][b] = sys.maxsize + matrix[a][b] = INF for c in range(a, b): - cost = Matrix[a][c] + Matrix[c+1][b] + array[a-1]*array[c]*array[b] - if cost < Matrix[a][b]: - Matrix[a][b] = cost - Sol[a][b] = c - return Matrix , Sol -#Print order of matrix with Ai as Matrix + cost = matrix[a][c] + matrix[c+1][b] + array[a-1]*array[c]*array[b] + if cost < matrix[a][b]: + matrix[a][b] = cost + sol[a][b] = c + return matrix , sol +#Print order of matrix with Ai as matrix -def PrintOptimalSolution(OptimalSolution,i,j): +def print_optimal_solution(optimal_solution,i,j): if i==j: print("A" + str(i),end = " ") else: print("(",end = " ") - PrintOptimalSolution(OptimalSolution,i,OptimalSolution[i][j]) - PrintOptimalSolution(OptimalSolution,OptimalSolution[i][j]+1,j) + print_optimal_solution(optimal_solution,i,optimal_solution[i][j]) + print_optimal_solution(optimal_solution,optimal_solution[i][j]+1,j) print(")",end = " ") def main(): @@ -36,9 +37,9 @@ def main(): n=len(array) #Size of matrix created from above array will be # 30*35 35*15 15*5 5*10 10*20 20*25 - Matrix , OptimalSolution = MatrixChainOrder(array) + matrix , optimal_solution = matrix_chain_order(array) - print("No. of Operation required: "+str((Matrix[1][n-1]))) - PrintOptimalSolution(OptimalSolution,1,n-1) + print("No. of Operation required: "+str((matrix[1][n-1]))) + print_optimal_solution(optimal_solution,1,n-1) if __name__ == '__main__': main() From 8a94913db1e680fcb79121df10fdc1ca42f9e7e6 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Thu, 8 Mar 2018 21:02:41 +0530 Subject: [PATCH 070/387] created coin_change.py ( #107 and #114 ) --- dp/coin_change.py | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 dp/coin_change.py diff --git a/dp/coin_change.py b/dp/coin_change.py new file mode 100644 index 000000000..e621fff61 --- /dev/null +++ b/dp/coin_change.py @@ -0,0 +1,47 @@ +""" +Problem +Given a value N, if we want to make change for N cents, and we have infinite supply of each of +S = { S1, S2, .. , Sm} valued //coins, how many ways can we make the change? +The order of coins doesn’t matter. +For example, for N = 4 and S = [1, 2, 3], there are four solutions: +[1, 1, 1, 1], [1, 1, 2], [2, 2], [1, 3]. +So output should be 4. + +For N = 10 and S = [2, 5, 3, 6], there are five solutions: +[2, 2, 2, 2, 2], [2, 2, 3, 3], [2, 2, 6], [2, 3, 5] and [5, 5]. +So the output should be 5. +""" + +def count(S, n): + # We need n+1 rows as the table is consturcted in bottom up + # manner using the base case 0 value case (n = 0) + m = len(S) + table = [[0 for x in range(m)] for x in range(n+1)] + + # Fill the enteries for 0 value case (n = 0) + for i in range(m): + table[0][i] = 1 + + # Fill rest of the table enteries in bottom up manner + for i in range(1, n+1): + for j in range(m): + # Count of solutions including S[j] + x = table[i - S[j]][j] if i-S[j] >= 0 else 0 + + # Count of solutions excluding S[j] + y = table[i][j-1] if j >= 1 else 0 + + # total count + table[i][j] = x + y + + return table[n][m-1] + +if __name__ == '__main__': + + coins = [1, 2, 3] + n = 4 + assert count(S, n) == 4 + + coins = [2, 5, 3, 6] + n = 10 + assert count(S, n) == 5 From 403d8b1dff478e491ccaa9f15183c839c5a1dd39 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Thu, 8 Mar 2018 21:22:28 +0530 Subject: [PATCH 071/387] added recursive implementation of inorder.py --- tree/traversal/inorder.py | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/tree/traversal/inorder.py b/tree/traversal/inorder.py index d48bcc8f2..4883c0f4f 100644 --- a/tree/traversal/inorder.py +++ b/tree/traversal/inorder.py @@ -20,6 +20,17 @@ def inorder(root): root = root.right return res +# Recursive Implementation +def inorder_rec(root, res=None): + if root is None: + return [] + if res is None: + res = [] + inorder_rec(root.left, res) + res.append(root.val) + inorder_rec(root.right, res) + return res + if __name__ == '__main__': n1 = Node(100) n2 = Node(50) @@ -31,4 +42,6 @@ def inorder(root): n1.left, n1.right = n2, n3 n2.left, n2.right = n4, n5 n3.left, n3.right = n6, n7 - print(inorder(n1)) + + assert inorder(n1) == [25, 50, 75, 100, 125, 150, 175] + assert inorder_rec(n1) == [25, 50, 75, 100, 125, 150, 175] From 57eb6940d608e5898b56c1617a86ad7f9166009c Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 13 Mar 2018 14:40:21 +0530 Subject: [PATCH 072/387] added .idea/ --- .gitignore | 1 + 1 file changed, 1 insertion(+) diff --git a/.gitignore b/.gitignore index 43ae0e2a6..060f62cab 100755 --- a/.gitignore +++ b/.gitignore @@ -1,2 +1,3 @@ __pycache__/ *.py[cod] +.idea/ From 122f2cb795c653615fc616cec6790aaef6364a3a Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 13 Mar 2018 15:32:58 +0530 Subject: [PATCH 073/387] refactored module name shadowing builtin modules --- README.md | 72 +++++++++---------- README_CN.md | 72 +++++++++---------- backtrack/palindrome_partitioning.py | 2 +- dp/regex_matching.py | 4 +- heap/merge_sorted_k_lists.py | 33 +++++---- {math => mymath}/extended_gcd.py | 0 {math => mymath}/gcd.py | 0 {math => mymath}/generate_strobogrammtic.py | 0 {math => mymath}/is_strobogrammatic.py | 0 {math => mymath}/nth_digit.py | 0 {math => mymath}/prime_test.py | 0 .../primes_sieve_of_eratosthenes.py | 0 {math => mymath}/pythagoras.py | 0 {math => mymath}/rabin_miller.py | 0 {math => mymath}/rsa.py | 0 {math => mymath}/sqrt_precision_factor.py | 0 {queue => myqueue}/__init__.py | 0 {queue => myqueue}/max_sliding_window.py | 5 +- {queue => myqueue}/moving_average.py | 0 {queue => myqueue}/queue.py | 13 ++-- {queue => myqueue}/reconstruct_queue.py | 0 {queue => myqueue}/zigzagiterator.py | 0 {string => mystring}/add_binary.py | 0 {string => mystring}/breaking_bad.py | 0 {string => mystring}/decode_string.py | 0 {string => mystring}/encode_decode.py | 26 ++----- {string => mystring}/group_anagrams.py | 0 {string => mystring}/int_to_roman.py | 0 {string => mystring}/is_palindrome.py | 0 {string => mystring}/license_number.py | 0 {string => mystring}/make_sentence.py | 0 {string => mystring}/multiply_strings.py | 0 {string => mystring}/one_edit_distance.py | 0 {string => mystring}/rabin_karp.py | 0 {string => mystring}/reverse_string.py | 0 {string => mystring}/reverse_vowel.py | 0 {string => mystring}/reverse_words.py | 0 {string => mystring}/roman_to_int.py | 0 {string => mystring}/word_squares.py | 0 39 files changed, 106 insertions(+), 121 deletions(-) rename {math => mymath}/extended_gcd.py (100%) rename {math => mymath}/gcd.py (100%) rename {math => mymath}/generate_strobogrammtic.py (100%) rename {math => mymath}/is_strobogrammatic.py (100%) rename {math => mymath}/nth_digit.py (100%) rename {math => mymath}/prime_test.py (100%) rename {math => mymath}/primes_sieve_of_eratosthenes.py (100%) rename {math => mymath}/pythagoras.py (100%) rename {math => mymath}/rabin_miller.py (100%) rename {math => mymath}/rsa.py (100%) rename {math => mymath}/sqrt_precision_factor.py (100%) rename {queue => myqueue}/__init__.py (100%) rename {queue => myqueue}/max_sliding_window.py (92%) rename {queue => myqueue}/moving_average.py (100%) rename {queue => myqueue}/queue.py (91%) rename {queue => myqueue}/reconstruct_queue.py (100%) rename {queue => myqueue}/zigzagiterator.py (100%) rename {string => mystring}/add_binary.py (100%) rename {string => mystring}/breaking_bad.py (100%) rename {string => mystring}/decode_string.py (100%) rename {string => mystring}/encode_decode.py (52%) rename {string => mystring}/group_anagrams.py (100%) rename {string => mystring}/int_to_roman.py (100%) rename {string => mystring}/is_palindrome.py (100%) rename {string => mystring}/license_number.py (100%) rename {string => mystring}/make_sentence.py (100%) rename {string => mystring}/multiply_strings.py (100%) rename {string => mystring}/one_edit_distance.py (100%) rename {string => mystring}/rabin_karp.py (100%) rename {string => mystring}/reverse_string.py (100%) rename {string => mystring}/reverse_vowel.py (100%) rename {string => mystring}/reverse_words.py (100%) rename {string => mystring}/roman_to_int.py (100%) rename {string => mystring}/word_squares.py (100%) diff --git a/README.md b/README.md index 94bcc0a44..9e5125177 100644 --- a/README.md +++ b/README.md @@ -100,18 +100,18 @@ Minimal and clean example implementations of data structures and algorithms in P - [longest_common_subsequence](map/longest_common_subsequence.py) - [randomized_set](map/randomized_set.py) - [valid_sudoku](map/valid_sudoku.py) -- [math](math) - - [extended_gcd](math/extended_gcd.py) - - [gcd/lcm](math/gcd.py) - - [prime_test](math/prime_test.py) - - [primes_sieve_of_eratosthenes](math/primes_sieve_of_eratosthenes.py) - - [generate_strobogrammtic](math/generate_strobogrammtic.py) - - [is_strobogrammatic](math/is_strobogrammatic.py) - - [nth_digit](math/nth_digit.py) - - [rabin_miller](math/rabin_miller.py) - - [rsa](math/rsa.py) - - [sqrt_precision_factor](math/sqrt_precision_factor.py) - - [pythagoras](math/pythagoras.py) +- [math](mymath) + - [extended_gcd](mymath/extended_gcd.py) + - [gcd/lcm](mymath/gcd.py) + - [prime_test](mymath/prime_test.py) + - [primes_sieve_of_eratosthenes](mymath/primes_sieve_of_eratosthenes.py) + - [generate_strobogrammtic](mymath/generate_strobogrammtic.py) + - [is_strobogrammatic](mymath/is_strobogrammatic.py) + - [nth_digit](mymath/nth_digit.py) + - [rabin_miller](mymath/rabin_miller.py) + - [rsa](mymath/rsa.py) + - [sqrt_precision_factor](mymath/sqrt_precision_factor.py) + - [pythagoras](mymath/pythagoras.py) - [matrix](matrix) - [matrix_rotation.txt](matrix/matrix_rotation.txt) - [copy_transform](matrix/copy_transform.py) @@ -121,12 +121,12 @@ Minimal and clean example implementations of data structures and algorithms in P - [sparse_mul](matrix/sparse_mul.py) - [spiral_traversal](matrix/spiral_traversal.py) - [count_paths](matrix/count_paths.py) -- [queue](queue) - - [max_sliding_window](queue/max_sliding_window.py) - - [moving_average](queue/moving_average.py) - - [queue](queue/queue.py) - - [reconstruct_queue](queue/reconstruct_queue.py) - - [zigzagiterator](queue/zigzagiterator.py) +- [queue](myqueue) + - [max_sliding_window](myqueue/max_sliding_window.py) + - [moving_average](myqueue/moving_average.py) + - [queue](myqueue/queue.py) + - [reconstruct_queue](myqueue/reconstruct_queue.py) + - [zigzagiterator](myqueue/zigzagiterator.py) - [search](search) - [binary_search](search/binary_search.py) - [count_elem](search/count_elem.py) @@ -153,24 +153,24 @@ Minimal and clean example implementations of data structures and algorithms in P - [simplify_path](stack/simplify_path.py) - [stack](stack/stack.py) - [valid_parenthesis](stack/valid_parenthesis.py) -- [string](string) - - [add_binary](string/add_binary.py) - - [breaking_bad](string/breaking_bad.py) - - [decode_string](string/decode_string.py) - - [encode_decode](string/encode_decode.py) - - [group_anagrams](string/group_anagrams.py) - - [int_to_roman](string/int_to_roman.py) - - [is_palindrome](string/is_palindrome.py) - - [license_number](string/license_number.py) - - [make_sentence](string/make_sentence.py) - - [multiply_strings](string/multiply_strings.py) - - [one_edit_distance](string/one_edit_distance.py) - - [rabin_karp](string/rabin_karp.py) - - [reverse_string](string/reverse_string.py) - - [reverse_vowel](string/reverse_vowel.py) - - [reverse_words](string/reverse_words.py) - - [roman_to_int](string/roman_to_int.py) - - [word_squares](string/word_squares.py) +- [string](mystring) + - [add_binary](mystring/add_binary.py) + - [breaking_bad](mystring/breaking_bad.py) + - [decode_string](mystring/decode_string.py) + - [encode_decode](mystring/encode_decode.py) + - [group_anagrams](mystring/group_anagrams.py) + - [int_to_roman](mystring/int_to_roman.py) + - [is_palindrome](mystring/is_palindrome.py) + - [license_number](mystring/license_number.py) + - [make_sentence](mystring/make_sentence.py) + - [multiply_strings](mystring/multiply_strings.py) + - [one_edit_distance](mystring/one_edit_distance.py) + - [rabin_karp](mystring/rabin_karp.py) + - [reverse_string](mystring/reverse_string.py) + - [reverse_vowel](mystring/reverse_vowel.py) + - [reverse_words](mystring/reverse_words.py) + - [roman_to_int](mystring/roman_to_int.py) + - [word_squares](mystring/word_squares.py) - [tree](tree) - [segment-tree](tree/Segment_Tree) - [segment_tree](tree/Segment_Tree/segment_tree.py) diff --git a/README_CN.md b/README_CN.md index 10930ea02..33ae75350 100644 --- a/README_CN.md +++ b/README_CN.md @@ -99,18 +99,18 @@ python版数据结构和算法实现的简约版小示例 - [longest_common_subsequence：最长公共子序列](map/longest_common_subsequence.py) - [randomized_set：随机集](map/randomized_set.py) - [valid_sudoku：有效数独](map/valid_sudoku.py) -- [math：数学问题](math) - - [extended_gcd：扩展欧几里得算法](math/extended_gcd.py) - - [gcd/lcm：最大公约数和最小公倍数](math/gcd.py) - - [prime_test：主要测试](math/prime_test.py) - - [primes_sieve_of_eratosthenes：埃拉托色尼的质数筛](math/primes_sieve_of_eratosthenes.py) - - [generate_strobogrammtic：生成对称数](math/generate_strobogrammtic.py) - - [is_strobogrammatic：判断对称数](math/is_strobogrammatic.py) - - [nth_digit：第n位](math/nth_digit.py) - - [rabin_miller：米勒-拉宾素性检验](math/rabin_miller.py) - - [rsa：rsa加密](math/rsa.py) - - [sqrt_precision_factor：开发精度因素](math/sqrt_precision_factor.py) - - [pythagoras：毕达哥拉斯](math/pythagoras.py) +- [math：数学问题](mymath) + - [extended_gcd：扩展欧几里得算法](mymath/extended_gcd.py) + - [gcd/lcm：最大公约数和最小公倍数](mymath/gcd.py) + - [prime_test：主要测试](mymath/prime_test.py) + - [primes_sieve_of_eratosthenes：埃拉托色尼的质数筛](mymath/primes_sieve_of_eratosthenes.py) + - [generate_strobogrammtic：生成对称数](mymath/generate_strobogrammtic.py) + - [is_strobogrammatic：判断对称数](mymath/is_strobogrammatic.py) + - [nth_digit：第n位](mymath/nth_digit.py) + - [rabin_miller：米勒-拉宾素性检验](mymath/rabin_miller.py) + - [rsa：rsa加密](mymath/rsa.py) + - [sqrt_precision_factor：开发精度因素](mymath/sqrt_precision_factor.py) + - [pythagoras：毕达哥拉斯](mymath/pythagoras.py) - [matrix：矩阵](matrix) - [matrix_rotation：矩阵旋转](matrix/matrix_rotation.txt) - [copy_transform：复制变换](matrix/copy_transform.py) @@ -120,12 +120,12 @@ python版数据结构和算法实现的简约版小示例 - [sparse_mul：稀疏矩阵](matrix/sparse_mul.py) - [spiral_traversal：循环遍历](matrix/spiral_traversal.py) - [count_paths：计算路径](matrix/count_paths.py) -- [queue：队列](queue) - - [max_sliding_window：最大移动窗口](queue/max_sliding_window.py) - - [moving_average：移动平均](queue/moving_average.py) - - [queue：队列](queue/queue.py) - - [reconstruct_queue：重建队列](queue/reconstruct_queue.py) - - [zigzagiterator：锯齿形迭代](queue/zigzagiterator.py) +- [queue：队列](myqueue) + - [max_sliding_window：最大移动窗口](myqueue/max_sliding_window.py) + - [moving_average：移动平均](myqueue/moving_average.py) + - [queue：队列](myqueue/queue.py) + - [reconstruct_queue：重建队列](myqueue/reconstruct_queue.py) + - [zigzagiterator：锯齿形迭代](myqueue/zigzagiterator.py) - [search：查找](search) - [binary_search：二分查找](search/binary_search.py) - [count_elem：元素计数](search/count_elem.py) @@ -152,24 +152,24 @@ python版数据结构和算法实现的简约版小示例 - [simplify_path：简化路径](stack/simplify_path.py) - [stack：栈](stack/stack.py) - [valid_parenthesis：验证括号](stack/valid_parenthesis.py) -- [string：字符串](string) - - [add_binary：二进制数相加](string/add_binary.py) - - [breaking_bad：打破坏](string/breaking_bad.py) - - [decode_string：字符串编码](string/decode_string.py) - - [encode_decode：编解码](string/encode_decode.py) - - [group_anagrams：群组错位词](string/group_anagrams.py) - - [int_to_roman：整数转换罗马数字](string/int_to_roman.py) - - [is_palindrome：回文字符串](string/is_palindrome.py) - - [license_number：拍照号码](string/license_number.py) - - [make_sentence：造句](string/make_sentence.py) - - [multiply_strings：字符串相乘](string/multiply_strings.py) - - [one_edit_distance：一个编辑距离](string/one_edit_distance.py) - - [rabin_karp：Rabin-Karp 算法](string/rabin_karp.py) - - [reverse_string：反转字符串](string/reverse_string.py) - - [reverse_vowel：反转元音](string/reverse_vowel.py) - - [reverse_words：反转单词](string/reverse_words.py) - - [roman_to_int：罗马数转换整数](string/roman_to_int.py) - - [word_squares：单词平方](string/word_squares.py) +- [string：字符串](mystring) + - [add_binary：二进制数相加](mystring/add_binary.py) + - [breaking_bad：打破坏](mystring/breaking_bad.py) + - [decode_string：字符串编码](mystring/decode_string.py) + - [encode_decode：编解码](mystring/encode_decode.py) + - [group_anagrams：群组错位词](mystring/group_anagrams.py) + - [int_to_roman：整数转换罗马数字](mystring/int_to_roman.py) + - [is_palindrome：回文字符串](mystring/is_palindrome.py) + - [license_number：拍照号码](mystring/license_number.py) + - [make_sentence：造句](mystring/make_sentence.py) + - [multiply_strings：字符串相乘](mystring/multiply_strings.py) + - [one_edit_distance：一个编辑距离](mystring/one_edit_distance.py) + - [rabin_karp：Rabin-Karp 算法](mystring/rabin_karp.py) + - [reverse_string：反转字符串](mystring/reverse_string.py) + - [reverse_vowel：反转元音](mystring/reverse_vowel.py) + - [reverse_words：反转单词](mystring/reverse_words.py) + - [roman_to_int：罗马数转换整数](mystring/roman_to_int.py) + - [word_squares：单词平方](mystring/word_squares.py) - [tree：树](tree) - [segment-tree：线段树](tree/Segment_Tree) - [segment_tree：线段树](tree/Segment_Tree/segment_tree.py) diff --git a/backtrack/palindrome_partitioning.py b/backtrack/palindrome_partitioning.py index 654079010..a515e6f04 100644 --- a/backtrack/palindrome_partitioning.py +++ b/backtrack/palindrome_partitioning.py @@ -14,7 +14,7 @@ def palindromic_substrings(s): return results # There's two loops. -# The outer loop checks each length of initial substring (in descending length order) to see if it is a palindrome. If so, it recurses on the rest of the string and loops over the returned values, adding the initial substring to each item before adding it to the results. +# The outer loop checks each length of initial substring (in descending length order) to see if it is a palindrome. If so, it recurses on the rest of the mystring and loops over the returned values, adding the initial substring to each item before adding it to the results. # A slightly more Pythonic approach would be to make a recursive generator: diff --git a/dp/regex_matching.py b/dp/regex_matching.py index 19ce37a2c..cb4b6b6c1 100644 --- a/dp/regex_matching.py +++ b/dp/regex_matching.py @@ -24,10 +24,10 @@ def isMatch(self, s, p): m, n = len(s) + 1, len(p) + 1 matches = [[False] * n for _ in range(m)] - # Match empty string with empty pattern + # Match empty mystring with empty pattern matches[0][0] = True - # Match empty string with .* + # Match empty mystring with .* for i, element in enumerate(p[1:], 2): matches[0][i] = matches[0][i - 2] and element == '*' diff --git a/heap/merge_sorted_k_lists.py b/heap/merge_sorted_k_lists.py index 13c53c3b9..740684320 100644 --- a/heap/merge_sorted_k_lists.py +++ b/heap/merge_sorted_k_lists.py @@ -2,13 +2,17 @@ Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. """ + +from heapq import heappop, heapreplace, heapify +from queue import PriorityQueue + + # Definition for singly-linked list. -# class ListNode(object): -# def __init__(self, x): -# self.val = x -# self.next = None +class ListNode(object): + def __init__(self, x): + self.val = x + self.next = None -from heapq import heappush, heappop, heapreplace, heapify def mergeKLists(lists): dummy = node = ListNode(0) @@ -17,7 +21,7 @@ def mergeKLists(lists): while h: v, n = h[0] if n.next is None: - heappop(h) #only change heap size when necessary + heappop(h) # only change heap size when necessary else: heapreplace(h, (n.next.val, n.next)) node.next = n @@ -25,18 +29,19 @@ def mergeKLists(lists): return dummy.next -from Queue import PriorityQueue def merge_k_lists(lists): dummy = ListNode(None) curr = dummy q = PriorityQueue() for node in lists: - if node: q.put((node.val,node)) + if node: + q.put((node.val, node)) while not q.empty(): - curr.next = q.get()[1] # These two lines seem to - curr=curr.next # be equivalent to :- curr = q.get()[1] - if curr.next: q.put((curr.next.val, curr.next)) + curr.next = q.get()[1] # These two lines seem to + curr = curr.next # be equivalent to :- curr = q.get()[1] + if curr.next: + q.put((curr.next.val, curr.next)) return dummy.next @@ -44,13 +49,13 @@ def merge_k_lists(lists): I think my code's complexity is also O(nlogk) and not using heap or priority queue, n means the total elements and k means the size of list. -The mergeTwoLists functiony in my code comes from the problem Merge Two Sorted Lists +The mergeTwoLists function in my code comes from the problem Merge Two Sorted Lists whose complexity obviously is O(n), n is the sum of length of l1 and l2. To put it simpler, assume the k is 2^x, So the progress of combination is like a full binary tree, from bottom to top. So on every level of tree, the combination complexity is n, -beacause every level have all n numbers without repetition. -The level of tree is x, ie logk. So the complexity is O(nlogk). +because every level have all n numbers without repetition. +The level of tree is x, ie log k. So the complexity is O(n log k). for example, 8 ListNode, and the length of every ListNode is x1, x2, x3, x4, x5, x6, x7, x8, total is n. diff --git a/math/extended_gcd.py b/mymath/extended_gcd.py similarity index 100% rename from math/extended_gcd.py rename to mymath/extended_gcd.py diff --git a/math/gcd.py b/mymath/gcd.py similarity index 100% rename from math/gcd.py rename to mymath/gcd.py diff --git a/math/generate_strobogrammtic.py b/mymath/generate_strobogrammtic.py similarity index 100% rename from math/generate_strobogrammtic.py rename to mymath/generate_strobogrammtic.py diff --git a/math/is_strobogrammatic.py b/mymath/is_strobogrammatic.py similarity index 100% rename from math/is_strobogrammatic.py rename to mymath/is_strobogrammatic.py diff --git a/math/nth_digit.py b/mymath/nth_digit.py similarity index 100% rename from math/nth_digit.py rename to mymath/nth_digit.py diff --git a/math/prime_test.py b/mymath/prime_test.py similarity index 100% rename from math/prime_test.py rename to mymath/prime_test.py diff --git a/math/primes_sieve_of_eratosthenes.py b/mymath/primes_sieve_of_eratosthenes.py similarity index 100% rename from math/primes_sieve_of_eratosthenes.py rename to mymath/primes_sieve_of_eratosthenes.py diff --git a/math/pythagoras.py b/mymath/pythagoras.py similarity index 100% rename from math/pythagoras.py rename to mymath/pythagoras.py diff --git a/math/rabin_miller.py b/mymath/rabin_miller.py similarity index 100% rename from math/rabin_miller.py rename to mymath/rabin_miller.py diff --git a/math/rsa.py b/mymath/rsa.py similarity index 100% rename from math/rsa.py rename to mymath/rsa.py diff --git a/math/sqrt_precision_factor.py b/mymath/sqrt_precision_factor.py similarity index 100% rename from math/sqrt_precision_factor.py rename to mymath/sqrt_precision_factor.py diff --git a/queue/__init__.py b/myqueue/__init__.py similarity index 100% rename from queue/__init__.py rename to myqueue/__init__.py diff --git a/queue/max_sliding_window.py b/myqueue/max_sliding_window.py similarity index 92% rename from queue/max_sliding_window.py rename to myqueue/max_sliding_window.py index 36157e301..977b640cf 100644 --- a/queue/max_sliding_window.py +++ b/myqueue/max_sliding_window.py @@ -1,5 +1,6 @@ import collections + # Keep indexes of good candidates in deque d. # The indexes in d are from the current window, they're increasing, # and their corresponding nums are decreasing. @@ -29,6 +30,6 @@ def max_sliding_window(nums, k): return out -array = [1,3,-1,-3,5,3,6,7] +array = [1, 3, -1, -3, 5, 3, 6, 7] -print(max_sliding_window(array)) +print(max_sliding_window(array, 5)) diff --git a/queue/moving_average.py b/myqueue/moving_average.py similarity index 100% rename from queue/moving_average.py rename to myqueue/moving_average.py diff --git a/queue/queue.py b/myqueue/queue.py similarity index 91% rename from queue/queue.py rename to myqueue/queue.py index 28fc3d865..6ce4ea6e2 100644 --- a/queue/queue.py +++ b/myqueue/queue.py @@ -20,11 +20,6 @@ def isEmpty(self): def __len__(self): return self.top - def __str__(self): - result = '------\n' - for element in self: - result += str(element) + '\n' - return result[:-1] + '\n------' class ArrayQueue(AbstractQueue): def __init__(self, size=10): @@ -59,7 +54,7 @@ def expand(self): expands size of the array. Time Complexity: O(n) """ - new_array = [None] * len(self.array) * 2 # double the size of the array + new_array = [None] * len(self.array) * 2 # double the size of the array for i, element in enumerate(self.array): new_array[i] = element self.array = new_array @@ -72,11 +67,13 @@ def __iter__(self): yield self.array[probe] probe -= 1 + class QueueNode(object): def __init__(self, value): self.value = value self.next = None + class LinkedListQueue(AbstractQueue): def __init__(self): AbstractQueue.__init__(self) @@ -113,6 +110,6 @@ def __iter__(self): yield probe.value probe = probe.next + class HeapPriorityQueue(AbstractQueue): - def __init__(self): - pass + pass diff --git a/queue/reconstruct_queue.py b/myqueue/reconstruct_queue.py similarity index 100% rename from queue/reconstruct_queue.py rename to myqueue/reconstruct_queue.py diff --git a/queue/zigzagiterator.py b/myqueue/zigzagiterator.py similarity index 100% rename from queue/zigzagiterator.py rename to myqueue/zigzagiterator.py diff --git a/string/add_binary.py b/mystring/add_binary.py similarity index 100% rename from string/add_binary.py rename to mystring/add_binary.py diff --git a/string/breaking_bad.py b/mystring/breaking_bad.py similarity index 100% rename from string/breaking_bad.py rename to mystring/breaking_bad.py diff --git a/string/decode_string.py b/mystring/decode_string.py similarity index 100% rename from string/decode_string.py rename to mystring/decode_string.py diff --git a/string/encode_decode.py b/mystring/encode_decode.py similarity index 52% rename from string/encode_decode.py rename to mystring/encode_decode.py index 8fecf3642..abc61ab53 100644 --- a/string/encode_decode.py +++ b/mystring/encode_decode.py @@ -1,25 +1,7 @@ -# Design an algorithm to encode a list of strings to a string. -# The encoded string is then sent over the network and is decoded -# back to the original list of strings. - -# Machine 1 (sender) has the function: - -# string encode(vector strs) { - # // ... your code - # return encoded_string; -# } -# Machine 2 (receiver) has the function: -# vector decode(string s) { - # //... your code - # return strs; -# } -# So Machine 1 does: - -# string encoded_string = encode(strs); -# and Machine 2 does: - -# vector strs2 = decode(encoded_string); -# strs2 in Machine 2 should be the same as strs in Machine 1. +""" Design an algorithm to encode a list of strings to a string. + The encoded mystring is then sent over the network and is decoded + back to the original list of strings. +""" # Implement the encode and decode methods. diff --git a/string/group_anagrams.py b/mystring/group_anagrams.py similarity index 100% rename from string/group_anagrams.py rename to mystring/group_anagrams.py diff --git a/string/int_to_roman.py b/mystring/int_to_roman.py similarity index 100% rename from string/int_to_roman.py rename to mystring/int_to_roman.py diff --git a/string/is_palindrome.py b/mystring/is_palindrome.py similarity index 100% rename from string/is_palindrome.py rename to mystring/is_palindrome.py diff --git a/string/license_number.py b/mystring/license_number.py similarity index 100% rename from string/license_number.py rename to mystring/license_number.py diff --git a/string/make_sentence.py b/mystring/make_sentence.py similarity index 100% rename from string/make_sentence.py rename to mystring/make_sentence.py diff --git a/string/multiply_strings.py b/mystring/multiply_strings.py similarity index 100% rename from string/multiply_strings.py rename to mystring/multiply_strings.py diff --git a/string/one_edit_distance.py b/mystring/one_edit_distance.py similarity index 100% rename from string/one_edit_distance.py rename to mystring/one_edit_distance.py diff --git a/string/rabin_karp.py b/mystring/rabin_karp.py similarity index 100% rename from string/rabin_karp.py rename to mystring/rabin_karp.py diff --git a/string/reverse_string.py b/mystring/reverse_string.py similarity index 100% rename from string/reverse_string.py rename to mystring/reverse_string.py diff --git a/string/reverse_vowel.py b/mystring/reverse_vowel.py similarity index 100% rename from string/reverse_vowel.py rename to mystring/reverse_vowel.py diff --git a/string/reverse_words.py b/mystring/reverse_words.py similarity index 100% rename from string/reverse_words.py rename to mystring/reverse_words.py diff --git a/string/roman_to_int.py b/mystring/roman_to_int.py similarity index 100% rename from string/roman_to_int.py rename to mystring/roman_to_int.py diff --git a/string/word_squares.py b/mystring/word_squares.py similarity index 100% rename from string/word_squares.py rename to mystring/word_squares.py From 3491c947b8acc205f548238797f80ab7232c91b0 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 13 Mar 2018 15:37:08 +0530 Subject: [PATCH 074/387] minor fix --- backtrack/palindrome_partitioning.py | 15 +++++++++------ dp/regex_matching.py | 4 ++-- 2 files changed, 11 insertions(+), 8 deletions(-) diff --git a/backtrack/palindrome_partitioning.py b/backtrack/palindrome_partitioning.py index a515e6f04..21500c180 100644 --- a/backtrack/palindrome_partitioning.py +++ b/backtrack/palindrome_partitioning.py @@ -1,6 +1,7 @@ -# It looks like you need to be looking not for all palindromic substrings, but rather for all the ways you can divide the input string up into palindromic substrings. (There's always at least one way, since one-character substrings are always palindromes.) - -# Here's the way I've done it: +""" It looks like you need to be looking not for all palindromic substrings, +but rather for all the ways you can divide the input string up into palindromic substrings. +(There's always at least one way, since one-character substrings are always palindromes.) +""" def palindromic_substrings(s): if not s: @@ -13,9 +14,11 @@ def palindromic_substrings(s): results.append([sub] + rest) return results -# There's two loops. -# The outer loop checks each length of initial substring (in descending length order) to see if it is a palindrome. If so, it recurses on the rest of the mystring and loops over the returned values, adding the initial substring to each item before adding it to the results. - +""" There's two loops. +The outer loop checks each length of initial substring (in descending length order) to see +if it is a palindrome. If so, it recurses on the rest of the string and loops over the returned +values, adding the initial substring to each item before adding it to the results. +""" # A slightly more Pythonic approach would be to make a recursive generator: def palindromic_substrings(s): diff --git a/dp/regex_matching.py b/dp/regex_matching.py index cb4b6b6c1..19ce37a2c 100644 --- a/dp/regex_matching.py +++ b/dp/regex_matching.py @@ -24,10 +24,10 @@ def isMatch(self, s, p): m, n = len(s) + 1, len(p) + 1 matches = [[False] * n for _ in range(m)] - # Match empty mystring with empty pattern + # Match empty string with empty pattern matches[0][0] = True - # Match empty mystring with .* + # Match empty string with .* for i, element in enumerate(p[1:], 2): matches[0][i] = matches[0][i - 2] and element == '*' From eb12fd675f7ee930f92407662f1e2558776a67b9 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 13 Mar 2018 22:08:47 +0530 Subject: [PATCH 075/387] updated algorithms' links in README.md --- README.md | 52 +++++++++++++++++++++++++++++++--------------------- 1 file changed, 31 insertions(+), 21 deletions(-) diff --git a/README.md b/README.md index 94bcc0a44..72e5566eb 100644 --- a/README.md +++ b/README.md @@ -60,24 +60,33 @@ Minimal and clean example implementations of data structures and algorithms in P - [dp](dp) - [buy_sell_stock](dp/buy_sell_stock.py) - [climbing_stairs](dp/climbing_stairs.py) + - [coin_change](dp/coin_change.py) - [combination_sum](dp/combination_sum.py) + - [egg_drop](dp/egg_drop.py) - [house_robber](dp/house_robber.py) + - [job_scheduling](dp/job_scheduling.py) - [knapsack](dp/knapsack.py) - [longest_increasing](dp/longest_increasing.py) + - [matrix_chain_order](dp/matrix_chain_order.py) - [max_product_subarray](dp/max_product_subarray.py) - [max_subarray](dp/max_subarray.py) + - [min_cost_path](dp/min_cost_path.py) - [num_decodings](dp/num_decodings.py) - [regex_matching](dp/regex_matching.py) + - [rod_cut](dp/rod_cut.py) - [word_break](dp/word_break.py) - [graph](graph) - - [2-sat](graph/satisfiability.py) + - [strongly_connected](graph/checkDiGraphStronglyConnected.py) - [clone_graph](graph/clone_graph.py) - [cycle_detection](graph/cycle_detection.py) + - [find_all_cliques](graph/find_all_cliques.py) - [find_path](graph/find_path.py) - [graph](graph/graph.py) - - [traversal](graph/traversal.py) - [markov_chain](graph/markov_chain.py) + - [minimum_spanning_tree](graph/minimum_spanning_tree.py) + - [satisfiability](graph/satisfiability.py) - [tarjan](graph/tarjan.py) + - [traversal](graph/traversal.py) - [heap](heap) - [merge_sorted_k_lists](heap/merge_sorted_k_lists.py) - [skyline](heap/skyline.py) @@ -101,26 +110,28 @@ Minimal and clean example implementations of data structures and algorithms in P - [randomized_set](map/randomized_set.py) - [valid_sudoku](map/valid_sudoku.py) - [math](math) + - [base_conversion](math/base_conversion.py) - [extended_gcd](math/extended_gcd.py) - [gcd/lcm](math/gcd.py) - - [prime_test](math/prime_test.py) - - [primes_sieve_of_eratosthenes](math/primes_sieve_of_eratosthenes.py) - [generate_strobogrammtic](math/generate_strobogrammtic.py) - [is_strobogrammatic](math/is_strobogrammatic.py) - [nth_digit](math/nth_digit.py) + - [prime_test](math/prime_test.py) + - [primes_sieve_of_eratosthenes](math/primes_sieve_of_eratosthenes.py) + - [pythagoras](math/pythagoras.py) - [rabin_miller](math/rabin_miller.py) - [rsa](math/rsa.py) - [sqrt_precision_factor](math/sqrt_precision_factor.py) - - [pythagoras](math/pythagoras.py) - [matrix](matrix) - - [matrix_rotation.txt](matrix/matrix_rotation.txt) - - [copy_transform](matrix/copy_transform.py) - [bomb_enemy](matrix/bomb_enemy.py) + - [copy_transform](matrix/copy_transform.py) + - [count_paths](matrix/count_paths.py) + - [matrix_rotation.txt](matrix/matrix_rotation.txt) - [rotate_image](matrix/rotate_image.py) + - [search_in_sorted_matrix](matrix/search_in_sorted_matrix.py) - [sparse_dot_vector](matrix/sparse_dot_vector.py) - [sparse_mul](matrix/sparse_mul.py) - [spiral_traversal](matrix/spiral_traversal.py) - - [count_paths](matrix/count_paths.py) - [queue](queue) - [max_sliding_window](queue/max_sliding_window.py) - [moving_average](queue/moving_average.py) @@ -129,7 +140,6 @@ Minimal and clean example implementations of data structures and algorithms in P - [zigzagiterator](queue/zigzagiterator.py) - [search](search) - [binary_search](search/binary_search.py) - - [count_elem](search/count_elem.py) - [first_occurance](search/first_occurance.py) - [last_occurance](search/last_occurance.py) - [set](set) @@ -172,10 +182,6 @@ Minimal and clean example implementations of data structures and algorithms in P - [roman_to_int](string/roman_to_int.py) - [word_squares](string/word_squares.py) - [tree](tree) - - [segment-tree](tree/Segment_Tree) - - [segment_tree](tree/Segment_Tree/segment_tree.py) - - [binary_tree_paths](tree/binary_tree_paths.py) - - [bintree2list](tree/bintree2list.py) - [bst](tree/tree/bst) - [array2bst](tree/bst/array2bst.py) - [bst_closest_value](tree/bst/bst_closest_value.py) @@ -188,6 +194,17 @@ Minimal and clean example implementations of data structures and algorithms in P - [serialize_deserialize](tree/bst/serialize_deserialize.py) - [successor](tree/bst/successor.py) - [unique_bst](tree/bst/unique_bst.py) + - [segment-tree](tree/Segment_Tree) + - [segment_tree](tree/Segment_Tree/segment_tree.py) + - [traversal](tree/traversal) + - [inorder](tree/traversal/inorder.py) + - [level_order](tree/traversal/level_order.py) + - [zigzag](tree/traversal/zigzag.py) + - [trie](tree/trie) + - [add_and_search](tree/trie/add_and_search.py) + - [trie](tree/trie/trie.py) + - [binary_tree_paths](tree/binary_tree_paths.py) + - [bintree2list](tree/bintree2list.py) - [deepest_left](tree/deepest_left.py) - [invert_tree](tree/invert_tree.py) - [is_balanced](tree/is_balanced.py) @@ -198,18 +215,11 @@ Minimal and clean example implementations of data structures and algorithms in P - [max_height](tree/max_height.py) - [max_path_sum](tree/max_path_sum.py) - [min_height](tree/min_height.py) - - [path_sum2](tree/path_sum2.py) - [path_sum](tree/path_sum.py) + - [path_sum2](tree/path_sum2.py) - [pretty_print](tree/pretty_print.py) - [same_tree](tree/same_tree.py) - - [traversal](tree/traversal) - - [inorder](tree/traversal/inorder.py) - - [level_order](tree/traversal/level_order.py) - - [zigzag](tree/traversal/zigzag.py) - [tree](tree/tree.py) - - [trie](tree/trie) - - [add_and_search](tree/trie/add_and_search.py) - - [trie](tree/trie/trie.py) - [union-find](union-find) - [count_islands](union-find/count_islands.py) From 6f7adc710a32ce9e4a5da7d3d1e1ff0b38f21d2c Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 13 Mar 2018 22:28:20 +0530 Subject: [PATCH 076/387] new changes --- .idea/algorithms.iml | 14 + .idea/misc.xml | 4 + .idea/modules.xml | 8 + .idea/vcs.xml | 6 + .idea/workspace.xml | 600 ++++++++++++++++++ README.md | 118 ++-- README_CN.md | 72 +-- {mymath => maths}/extended_gcd.py | 0 {mymath => maths}/gcd.py | 0 {mymath => maths}/generate_strobogrammtic.py | 0 {mymath => maths}/is_strobogrammatic.py | 0 {mymath => maths}/nth_digit.py | 0 {mymath => maths}/prime_test.py | 14 +- .../primes_sieve_of_eratosthenes.py | 0 {mymath => maths}/pythagoras.py | 0 {mymath => maths}/rabin_miller.py | 0 {mymath => maths}/rsa.py | 0 {mymath => maths}/sqrt_precision_factor.py | 0 {myqueue => queues}/__init__.py | 0 {myqueue => queues}/max_sliding_window.py | 0 {myqueue => queues}/moving_average.py | 0 {myqueue => queues}/queue.py | 0 {myqueue => queues}/reconstruct_queue.py | 0 {myqueue => queues}/zigzagiterator.py | 0 {mystring => strings}/add_binary.py | 0 {mystring => strings}/breaking_bad.py | 0 {mystring => strings}/decode_string.py | 0 {mystring => strings}/encode_decode.py | 0 {mystring => strings}/group_anagrams.py | 0 {mystring => strings}/int_to_roman.py | 0 {mystring => strings}/is_palindrome.py | 0 {mystring => strings}/license_number.py | 0 {mystring => strings}/make_sentence.py | 0 {mystring => strings}/multiply_strings.py | 0 {mystring => strings}/one_edit_distance.py | 0 {mystring => strings}/rabin_karp.py | 0 {mystring => strings}/reverse_string.py | 0 {mystring => strings}/reverse_vowel.py | 0 {mystring => strings}/reverse_words.py | 2 +- {mystring => strings}/roman_to_int.py | 0 {mystring => strings}/word_squares.py | 0 41 files changed, 740 insertions(+), 98 deletions(-) create mode 100644 .idea/algorithms.iml create mode 100644 .idea/misc.xml create mode 100644 .idea/modules.xml create mode 100644 .idea/vcs.xml create mode 100644 .idea/workspace.xml rename {mymath => maths}/extended_gcd.py (100%) rename {mymath => maths}/gcd.py (100%) rename {mymath => maths}/generate_strobogrammtic.py (100%) rename {mymath => maths}/is_strobogrammatic.py (100%) rename {mymath => maths}/nth_digit.py (100%) rename {mymath => maths}/prime_test.py (60%) rename {mymath => maths}/primes_sieve_of_eratosthenes.py (100%) rename {mymath => maths}/pythagoras.py (100%) rename {mymath => maths}/rabin_miller.py (100%) rename {mymath => maths}/rsa.py (100%) rename {mymath => maths}/sqrt_precision_factor.py (100%) rename {myqueue => queues}/__init__.py (100%) rename {myqueue => queues}/max_sliding_window.py (100%) rename {myqueue => queues}/moving_average.py (100%) rename {myqueue => queues}/queue.py (100%) rename {myqueue => queues}/reconstruct_queue.py (100%) rename {myqueue => queues}/zigzagiterator.py (100%) rename {mystring => strings}/add_binary.py (100%) rename {mystring => strings}/breaking_bad.py (100%) rename {mystring => strings}/decode_string.py (100%) rename {mystring => strings}/encode_decode.py (100%) rename {mystring => strings}/group_anagrams.py (100%) rename {mystring => strings}/int_to_roman.py (100%) rename {mystring => strings}/is_palindrome.py (100%) rename {mystring => strings}/license_number.py (100%) rename {mystring => strings}/make_sentence.py (100%) rename {mystring => strings}/multiply_strings.py (100%) rename {mystring => strings}/one_edit_distance.py (100%) rename {mystring => strings}/rabin_karp.py (100%) rename {mystring => strings}/reverse_string.py (100%) rename {mystring => strings}/reverse_vowel.py (100%) rename {mystring => strings}/reverse_words.py (95%) rename {mystring => strings}/roman_to_int.py (100%) rename {mystring => strings}/word_squares.py (100%) diff --git a/.idea/algorithms.iml b/.idea/algorithms.iml new file mode 100644 index 000000000..9786b3381 --- /dev/null +++ b/.idea/algorithms.iml @@ -0,0 +1,14 @@ + + + + + + + + + + + + \ No newline at end of file diff --git a/.idea/misc.xml b/.idea/misc.xml new file mode 100644 index 000000000..09fe154e3 --- /dev/null +++ b/.idea/misc.xml @@ -0,0 +1,4 @@ + + + + \ No newline at end of file diff --git a/.idea/modules.xml b/.idea/modules.xml new file mode 100644 index 000000000..5682d7342 --- /dev/null +++ b/.idea/modules.xml @@ -0,0 +1,8 @@ + + + + + + + + \ No newline at end of file diff --git a/.idea/vcs.xml b/.idea/vcs.xml new file mode 100644 index 000000000..94a25f7f4 --- /dev/null +++ b/.idea/vcs.xml @@ -0,0 +1,6 @@ + + + + + + \ No newline at end of file diff --git a/.idea/workspace.xml b/.idea/workspace.xml new file mode 100644 index 000000000..9cb6e952f --- /dev/null +++ b/.idea/workspace.xml @@ -0,0 +1,600 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + true + DEFINITION_ORDER + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1520931911816 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - \ No newline at end of file From 0edf9f34c1f3a0e34a0641cfc81d32b541b52c27 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Wed, 14 Mar 2018 00:17:39 +0530 Subject: [PATCH 078/387] Added CONTRIBUTING.md file --- CONTRIBUTING.md | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ README.md | 3 +++ 2 files changed, 52 insertions(+) create mode 100644 CONTRIBUTING.md diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md new file mode 100644 index 000000000..c59475031 --- /dev/null +++ b/CONTRIBUTING.md @@ -0,0 +1,49 @@ +# Contributing + +We love pull requests from everyone. By contributing to this repository, you +agree to abide by the [Code of Conduct](CODE_OF_CONDUCT.md). + +## Get Started +First [Fork][fork] the repository and then clone it using: + + git clone git@github.com:your-username/algorithms.git + + +You may contribute by: +- implementing new algorithms in the repo. Be sure to keep it under +right section (e.g. [array](array), [dp](dp), etc). Make a new section for it if +it doesn't fall under any section. +- optimizing or improving the existing algorithms. +- adding a different solution for the problem. +- finding and fixing bugs. +- adding examples to explain the algorithms better. +- adding test cases. + +## Pull Requests +Push to your fork and [submit a pull request][pr]. + +We will review and may suggest some changes or improvements or alternatives. +Some things that will increase the chance that your pull request is accepted: + +* All algorithms should be written in **Python 3**. +(There are a few algorithms still in _Python 2_ syntax. You can start by converting +[those][issue120] to _Python 3_.) +* Write clean and understandable code. +* Properly comment the code and briefly explain what the algorithm is doing in the [docstrings][docstr]. +* You may also explain the output using a minimal example. +* Try to also include a couple of test cases for the algorithm. +* Write a [good commit message][commit]. + + +## Issues +Whenever you want a new algorithm to be added, or find some bugs in the existing algorithms, +just [submit an issue][newissue] and feel free to discuss over it. +Or you may resolve any of the [existing issues][issues]. + +[fork]: https://help.github.com/articles/fork-a-repo/ +[docstr]: https://www.python.org/dev/peps/pep-0257/#multi-line-docstrings +[commit]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html +[pr]: https://github.com/keon/algorithms/compare/ +[newissue]: https://github.com/keon/algorithms/issues/new +[issue120]: https://github.com/keon/algorithms/issues/120 +[issues]: https://github.com/keon/algorithms/issues/ \ No newline at end of file diff --git a/README.md b/README.md index 72e5566eb..613bcd11b 100644 --- a/README.md +++ b/README.md @@ -5,6 +5,9 @@ Pythonic Data Structures and Algorithms Minimal and clean example implementations of data structures and algorithms in Python. +## Contributing +Thanks for your interest in contributing! There are many ways to contribute to this project. [Get started here](CONTRIBUTING.md) + ## List of Implementations From 674d9fd3737ed3e5920c1137f45594de849bcac2 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Wed, 14 Mar 2018 00:20:40 +0530 Subject: [PATCH 079/387] Update CONTRIBUTING.md --- CONTRIBUTING.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md index c59475031..8bc7832a7 100644 --- a/CONTRIBUTING.md +++ b/CONTRIBUTING.md @@ -4,7 +4,7 @@ We love pull requests from everyone. By contributing to this repository, you agree to abide by the [Code of Conduct](CODE_OF_CONDUCT.md). ## Get Started -First [Fork][fork] the repository and then clone it using: +First [fork][fork] the repository and then clone it using: git clone git@github.com:your-username/algorithms.git @@ -46,4 +46,4 @@ Or you may resolve any of the [existing issues][issues]. [pr]: https://github.com/keon/algorithms/compare/ [newissue]: https://github.com/keon/algorithms/issues/new [issue120]: https://github.com/keon/algorithms/issues/120 -[issues]: https://github.com/keon/algorithms/issues/ \ No newline at end of file +[issues]: https://github.com/keon/algorithms/issues/ From c0d152527dbd6be842bcf8ff46749a30aee8ae4f Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Wed, 14 Mar 2018 19:05:56 +0530 Subject: [PATCH 080/387] minor fix --- {math => maths}/base_conversion.py | 0 1 file changed, 0 insertions(+), 0 deletions(-) rename {math => maths}/base_conversion.py (100%) diff --git a/math/base_conversion.py b/maths/base_conversion.py similarity index 100% rename from math/base_conversion.py rename to maths/base_conversion.py From a1d5099e71da80dc7125818060f0599941714728 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Fri, 16 Mar 2018 14:39:15 +0530 Subject: [PATCH 081/387] use snake_case and apces around ` = ` --- graph/Transitive_Closure_DFS.py | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) diff --git a/graph/Transitive_Closure_DFS.py b/graph/Transitive_Closure_DFS.py index 8cd70881a..8e8e74da4 100644 --- a/graph/Transitive_Closure_DFS.py +++ b/graph/Transitive_Closure_DFS.py @@ -11,15 +11,15 @@ def __init__(self, vertices): self.tc = [[0 for j in range(self.V)] for i in range(self.V)] # function to add an edge to graph - def addEdge(self, u, v): + def add_edge(self, u, v): if u in self.graph: self.graph[u].append(v) else: - self.graph[u]=[v] + self.graph[u] = [v] # A recursive DFS traversal function that finds # all reachable vertices for s - def DFSUtil(self, s, v): + def dfs_util(self, s, v): # Mark reachability from s to v as true. self.tc[s][v] = 1 @@ -27,26 +27,26 @@ def DFSUtil(self, s, v): # Find all the vertices reachable through v for i in self.graph[v]: if self.tc[s][i] == 0: - self.DFSUtil(s, i) + self.dfs_util(s, i) # The function to find transitive closure. It uses - # recursive DFSUtil() - def transitiveClosure(self): + # recursive dfs_util() + def transitive_closure(self): # Call the recursive helper function to print DFS # traversal starting from all vertices one by one for i in range(self.V): - self.DFSUtil(i, i) + self.dfs_util(i, i) print(self.tc) g = Graph(4) -g.addEdge(0, 1) -g.addEdge(0, 2) -g.addEdge(1, 2) -g.addEdge(2, 0) -g.addEdge(2, 3) -g.addEdge(3, 3) +g.add_edge(0, 1) +g.add_edge(0, 2) +g.add_edge(1, 2) +g.add_edge(2, 0) +g.add_edge(2, 3) +g.add_edge(3, 3) print("Transitive closure matrix is") -g.transitiveClosure() +g.transitive_closure() From c9af948d72db12db75ca8c67c3ffe9d229736f0c Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Fri, 16 Mar 2018 14:40:09 +0530 Subject: [PATCH 082/387] snake_case --- graph/graph.py | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/graph/graph.py b/graph/graph.py index 1ce8a4bf3..7e551f3d6 100644 --- a/graph/graph.py +++ b/graph/graph.py @@ -10,16 +10,16 @@ def __init__(self, vertices): self.tc = [[0 for j in range(self.V)] for i in range(self.V)] # function to add an edge to graph - def addEdge(self, u, v): + def add_edge(self, u, v): if u in self.graph: self.graph[u].append(v) else: self.graph[u] = [v] g = Graph(4) -g.addEdge(0, 1) -g.addEdge(0, 2) -g.addEdge(1, 2) -g.addEdge(2, 0) -g.addEdge(2, 3) -g.addEdge(3, 3) +g.add_edge(0, 1) +g.add_edge(0, 2) +g.add_edge(1, 2) +g.add_edge(2, 0) +g.add_edge(2, 3) +g.add_edge(3, 3) From c4307ceacef5bcade4f1f59240da18b55488f404 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Fri, 16 Mar 2018 14:46:30 +0530 Subject: [PATCH 083/387] detect_loop already implemeted with 2 pointer method --- linkedlist/detect_loop.py | 50 --------------------------------------- 1 file changed, 50 deletions(-) delete mode 100644 linkedlist/detect_loop.py diff --git a/linkedlist/detect_loop.py b/linkedlist/detect_loop.py deleted file mode 100644 index d3d21d01e..000000000 --- a/linkedlist/detect_loop.py +++ /dev/null @@ -1,50 +0,0 @@ -def detect_loop(head): - """ - Given a circular linked list, implement an algorithm which returns the node - at the beginning of the loop. - * DEFINITION - * Circular linked list: A (corrupt) linked list in which a node's next pointer points to an earlier node, so as to make a loop in the linked list. - * EXAMPLE - * Input: A->B->C->D->E->C [the same C as earlier] - * Output: C - """ - if not (head and head.next): - return None - seen = [] - while head: - if head in seen and head.next in seen: - return head - else: - seen.append(head) - head = head.next - return None - - -class Node(object): - def __init__(self, val=None): - self.val = val - self.next = None - - -def test(): - - # A->B->C->D->E->C [the same C as earlier] - - a = Node("A") - b = Node("B") - c = Node("C") - d = Node("D") - e = Node("E") - - a.next = b - b.next = c - c.next = d - d.next = e - e.next = c - - # We do not print the list itself, because it will run forever! - print detect_loop(a) - assert detect_loop(a).val == c.val - -if __name__ == '__main__': - test() From 61fb4f4710884ff0fb200b5df226e5bd090b7081 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Fri, 16 Mar 2018 14:53:49 +0530 Subject: [PATCH 084/387] Update remove_duplicates.py --- linkedlist/remove_duplicates.py | 119 -------------------------------- 1 file changed, 119 deletions(-) diff --git a/linkedlist/remove_duplicates.py b/linkedlist/remove_duplicates.py index 48015a937..8b1378917 100644 --- a/linkedlist/remove_duplicates.py +++ b/linkedlist/remove_duplicates.py @@ -1,120 +1 @@ -class Node(): - def __init__(self, val=None): - self.val = val - self.next = None - -def kth_to_last_eval(head, k): - """ - This is a suboptimal, hacky method using eval(), which is not - safe for user input. We guard against danger by ensuring k in an int - """ - if not isinstance(k, int) or not head.val: - return False - - nexts = '.'.join(['next' for n in range(1, k+1)]) - seeker = str('.'.join(['head', nexts])) - - while head: - if eval(seeker) is None: - return head - else: - head = head.next - - return False - - -def kth_to_last_dict(head, k): - """ - This is a brute force method where we keep a dict the size of the list - Then we check it for the value we need. If the key is not in the dict, - our and statement will short circuit and return False - """ - if not (head and k > -1): - return False - d = dict() - count = 0 - while head: - d[count] = head - head = head.next - count += 1 - return len(d)-k in d and d[len(d)-k] - - -def kth_to_last(head, k): - """ - This is an optimal method using iteration. - We move p1 k steps ahead into the list. - Then we move p1 and p2 together until p1 hits the end. - """ - if not (head or k > -1): - return False - p1 = head - p2 = head - for i in range(1, k+1): - if p1 is None: - # Went too far, k is not valid - raise IndexError - p1 = p1.next - while p1: - p1 = p1.next - p2 = p2.next - return p2 - - -def printLinkedList(head): - string = "" - while head.next: - string += head.val + " -> " - head = head.next - string += head.val - print(string) - - -def test(): - # def make_test_li - # A A B C D C F G - a1 = Node("A") - a2 = Node("A") - b = Node("B") - c1 = Node("C") - d = Node("D") - c2 = Node("C") - f = Node("F") - g = Node("G") - a1.next = a2 - a2.next = b - b.next = c1 - c1.next = d - d.next = c2 - c2.next = f - f.next = g - printLinkedList(a1) - - # test kth_to_last_eval - kth = kth_to_last_eval(a1, 4) - try: - assert kth.val == "D" - except AssertionError as e: - e.args += ("Expecting D, got %s" % kth.val,) - raise - - # test kth_to_last_dict - kth = kth_to_last_dict(a1, 4) - try: - assert kth.val == "D" - except AssertionError as e: - e.args += ("Expecting D, got %s" % kth.val,) - raise - - # test kth_to_last - kth = kth_to_last(a1, 4) - try: - assert kth.val == "D" - except AssertionError as e: - e.args += ("Expecting D, got %s" % kth.val,) - raise - print("all passed.") - -if __name__ == '__main__': - test() From 6f74d6e8da91e9ff056fb6c6b0d640ed13a3793b Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Fri, 16 Mar 2018 14:55:31 +0530 Subject: [PATCH 085/387] moved code to correct file --- linkedlist/kth_to_last.py | 132 ++++++++++++++++++++++++++++++-------- 1 file changed, 104 insertions(+), 28 deletions(-) diff --git a/linkedlist/kth_to_last.py b/linkedlist/kth_to_last.py index 873bdccac..48015a937 100644 --- a/linkedlist/kth_to_last.py +++ b/linkedlist/kth_to_last.py @@ -1,14 +1,66 @@ class Node(): - def __init__(self, val = None): + def __init__(self, val=None): self.val = val self.next = None -def printKthToLast(head): + +def kth_to_last_eval(head, k): + """ + This is a suboptimal, hacky method using eval(), which is not + safe for user input. We guard against danger by ensuring k in an int + """ + if not isinstance(k, int) or not head.val: + return False + + nexts = '.'.join(['next' for n in range(1, k+1)]) + seeker = str('.'.join(['head', nexts])) + + while head: + if eval(seeker) is None: + return head + else: + head = head.next + + return False + + +def kth_to_last_dict(head, k): + """ + This is a brute force method where we keep a dict the size of the list + Then we check it for the value we need. If the key is not in the dict, + our and statement will short circuit and return False """ - Time Complexity: O() - Space Complexity: O() + if not (head and k > -1): + return False + d = dict() + count = 0 + while head: + d[count] = head + head = head.next + count += 1 + return len(d)-k in d and d[len(d)-k] + + +def kth_to_last(head, k): """ - pass + This is an optimal method using iteration. + We move p1 k steps ahead into the list. + Then we move p1 and p2 together until p1 hits the end. + """ + if not (head or k > -1): + return False + p1 = head + p2 = head + for i in range(1, k+1): + if p1 is None: + # Went too far, k is not valid + raise IndexError + p1 = p1.next + while p1: + p1 = p1.next + p2 = p2.next + return p2 + def printLinkedList(head): string = "" @@ -18,27 +70,51 @@ def printLinkedList(head): string += head.val print(string) -# A A B C D C F G - -a1 = Node("A") -a2 = Node("A") -b = Node("B") -c1 = Node("C") -d = Node("D") -c2 = Node("C") -f = Node("F") -g = Node("G") - -a1.next = a2 -a2.next = b -b.next = c1 -c1.next = d -d.next = c2 -c2.next = f -f.next = g - -# removeDups(a1) -# printLinkedList(a1) -# removeDupsWithoutSet(a1) -# printLinkedList(a1) +def test(): + # def make_test_li + # A A B C D C F G + a1 = Node("A") + a2 = Node("A") + b = Node("B") + c1 = Node("C") + d = Node("D") + c2 = Node("C") + f = Node("F") + g = Node("G") + a1.next = a2 + a2.next = b + b.next = c1 + c1.next = d + d.next = c2 + c2.next = f + f.next = g + printLinkedList(a1) + + # test kth_to_last_eval + kth = kth_to_last_eval(a1, 4) + try: + assert kth.val == "D" + except AssertionError as e: + e.args += ("Expecting D, got %s" % kth.val,) + raise + + # test kth_to_last_dict + kth = kth_to_last_dict(a1, 4) + try: + assert kth.val == "D" + except AssertionError as e: + e.args += ("Expecting D, got %s" % kth.val,) + raise + + # test kth_to_last + kth = kth_to_last(a1, 4) + try: + assert kth.val == "D" + except AssertionError as e: + e.args += ("Expecting D, got %s" % kth.val,) + raise + print("all passed.") + +if __name__ == '__main__': + test() From 860229db2eee60cb8a113757a82cb04c05ee4386 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Fri, 16 Mar 2018 14:58:56 +0530 Subject: [PATCH 086/387] Update remove_duplicates.py --- linkedlist/remove_duplicates.py | 65 +++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) diff --git a/linkedlist/remove_duplicates.py b/linkedlist/remove_duplicates.py index 8b1378917..a9f791cc4 100644 --- a/linkedlist/remove_duplicates.py +++ b/linkedlist/remove_duplicates.py @@ -1 +1,66 @@ +class Node(): + def __init__(self, val = None): + self.val = val + self.next = None +def removeDups(head): + """ + Time Complexity: O(N) + Space Complexity: O(N) + """ + hashset = set() + prev = Node() + while head: + if head.val in hashset: + prev.next = head.next + else: + hashset.add(head.val) + prev = head + head = head.next + +def removeDupsWithoutSet(head): + """ + Time Complexity: O(N^2) + Space Complexity: O(1) + """ + current = head + while current: + runner = current + while runner.next: + if runner.next.val == current.val: + runner.next = runner.next.next + else: + runner = runner.next + current = current.next + +def printLinkedList(head): + string = "" + while head.next: + string += head.val + " -> " + head = head.next + string += head.val + print(string) + +# A A B C D C F G + +a1 = Node("A") +a2 = Node("A") +b = Node("B") +c1 = Node("C") +d = Node("D") +c2 = Node("C") +f = Node("F") +g = Node("G") + +a1.next = a2 +a2.next = b +b.next = c1 +c1.next = d +d.next = c2 +c2.next = f +f.next = g + +removeDups(a1) +printLinkedList(a1) +removeDupsWithoutSet(a1) +printLinkedList(a1) From ea43887ee9f9ce94ac1c0337e2e45c1d90331fa6 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Sun, 18 Mar 2018 01:39:58 +0530 Subject: [PATCH 087/387] add link to code triage --- README.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/README.md b/README.md index 3dbb63569..71778686b 100644 --- a/README.md +++ b/README.md @@ -1,5 +1,7 @@ English | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) +[![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) + Pythonic Data Structures and Algorithms ========================================= From 6db016127058c7bb525ce54a45785f10c8bec356 Mon Sep 17 00:00:00 2001 From: Saad Date: Sat, 17 Mar 2018 22:08:44 -0500 Subject: [PATCH 088/387] Create Perfect-Square.py Add an additional algorithm for finding the next perfect square --- math/Next-Perfect-Square | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 math/Next-Perfect-Square diff --git a/math/Next-Perfect-Square b/math/Next-Perfect-Square new file mode 100644 index 000000000..906e26ce9 --- /dev/null +++ b/math/Next-Perfect-Square @@ -0,0 +1,16 @@ +This program will look for the next perfect square. + +""" +parameter passed will be checked to see if it is not return -1 otherwise look for the next perfect square + +for instance if you pass 121 then the script should return the next perefct square which is 144. + +""" + +def find_next_square(sq): + root = sq ** 0.5 + if root.is_integer(): + return (root + 1)**2 + return -1 + + From 715b38a58f8a3785d9215c9dc19b51737d7d06b7 Mon Sep 17 00:00:00 2001 From: Saad Date: Sat, 17 Mar 2018 22:13:23 -0500 Subject: [PATCH 089/387] Update next-perfect-square.py Add another more reader-friendly way of solving the problem --- math/Next-Perfect-Square | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/math/Next-Perfect-Square b/math/Next-Perfect-Square index 906e26ce9..f02cef81c 100644 --- a/math/Next-Perfect-Square +++ b/math/Next-Perfect-Square @@ -14,3 +14,8 @@ def find_next_square(sq): return -1 +Another way: + +def find_next_square(sq): + x = sq**0.5 + return -1 if x % 1 else (x+1)**2 From d3bc526c253b74708275f7aec83419e6951548a8 Mon Sep 17 00:00:00 2001 From: Saad Date: Sun, 18 Mar 2018 11:33:09 -0500 Subject: [PATCH 090/387] Sync the repo --- math/Next-Perfect-Square | 21 --------------------- 1 file changed, 21 deletions(-) delete mode 100644 math/Next-Perfect-Square diff --git a/math/Next-Perfect-Square b/math/Next-Perfect-Square deleted file mode 100644 index f02cef81c..000000000 --- a/math/Next-Perfect-Square +++ /dev/null @@ -1,21 +0,0 @@ -This program will look for the next perfect square. - -""" -parameter passed will be checked to see if it is not return -1 otherwise look for the next perfect square - -for instance if you pass 121 then the script should return the next perefct square which is 144. - -""" - -def find_next_square(sq): - root = sq ** 0.5 - if root.is_integer(): - return (root + 1)**2 - return -1 - - -Another way: - -def find_next_square(sq): - x = sq**0.5 - return -1 if x % 1 else (x+1)**2 From 3dfa18ae2365fc5eff32ef2bdb19b6225e9f16af Mon Sep 17 00:00:00 2001 From: Saad Date: Sun, 18 Mar 2018 11:36:22 -0500 Subject: [PATCH 091/387] Create find-perfect-square --- maths/next-perfect-square | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 maths/next-perfect-square diff --git a/maths/next-perfect-square b/maths/next-perfect-square new file mode 100644 index 000000000..d68d67783 --- /dev/null +++ b/maths/next-perfect-square @@ -0,0 +1,21 @@ +This program will look for the next perfect square. + +""" +Check the argument to see if it is a perfect square itself, if it is not then return -1 otherwise look for the next perfect square + +for instance if you pass 121 then the script should return the next perefct square which is 144. + +""" + +def find_next_square(sq): + root = sq ** 0.5 + if root.is_integer(): + return (root + 1)**2 + return -1 + + +Another way: + +def find_next_square(sq): + x = sq**0.5 + return -1 if x % 1 else (x+1)**2 From b5b4e96b042ae24dce3171205e146352968c9265 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 19 Mar 2018 07:24:42 +0530 Subject: [PATCH 092/387] Fixed comments --- maths/next-perfect-square | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/maths/next-perfect-square b/maths/next-perfect-square index d68d67783..e2152e777 100644 --- a/maths/next-perfect-square +++ b/maths/next-perfect-square @@ -1,4 +1,4 @@ -This program will look for the next perfect square. +# This program will look for the next perfect square. """ Check the argument to see if it is a perfect square itself, if it is not then return -1 otherwise look for the next perfect square @@ -14,7 +14,7 @@ def find_next_square(sq): return -1 -Another way: +# Another way: def find_next_square(sq): x = sq**0.5 From 1d2ac92b6eee29677c25264b69c57e1d6f5c3a2d Mon Sep 17 00:00:00 2001 From: Saad Date: Sun, 18 Mar 2018 20:58:47 -0500 Subject: [PATCH 093/387] Fix the comments --- maths/next-perfect-square | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/maths/next-perfect-square b/maths/next-perfect-square index e2152e777..dc52ddcd1 100644 --- a/maths/next-perfect-square +++ b/maths/next-perfect-square @@ -1,10 +1,7 @@ -# This program will look for the next perfect square. - """ +This program will look for the next perfect square. Check the argument to see if it is a perfect square itself, if it is not then return -1 otherwise look for the next perfect square - -for instance if you pass 121 then the script should return the next perefct square which is 144. - +for instance if you pass 121 then the script should return the next perfect square which is 144. """ def find_next_square(sq): From 1135676acd05e8298bf985875c194e18b8ec44af Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 19 Mar 2018 13:24:58 +0530 Subject: [PATCH 094/387] Rename next-perfect-square to next_perfect_square for consistency --- maths/{next-perfect-square => next_perfect_square} | 0 1 file changed, 0 insertions(+), 0 deletions(-) rename maths/{next-perfect-square => next_perfect_square} (100%) diff --git a/maths/next-perfect-square b/maths/next_perfect_square similarity index 100% rename from maths/next-perfect-square rename to maths/next_perfect_square From f6954c54f84044bbb276ba22c6a0cda4824cac13 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 19 Mar 2018 13:28:20 +0530 Subject: [PATCH 095/387] rename next-perfect-square to next_perfect_square.py for consistency --- maths/{next_perfect_square => next_perfect_square.py} | 0 1 file changed, 0 insertions(+), 0 deletions(-) rename maths/{next_perfect_square => next_perfect_square.py} (100%) diff --git a/maths/next_perfect_square b/maths/next_perfect_square.py similarity index 100% rename from maths/next_perfect_square rename to maths/next_perfect_square.py From a99878eeb0f3c6d9ee9ff479b37923dacfd5bcd9 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 19 Mar 2018 13:28:57 +0530 Subject: [PATCH 096/387] add next_perfect_square.py --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index 71778686b..df65941fd 100644 --- a/README.md +++ b/README.md @@ -120,6 +120,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [gcd/lcm](maths/gcd.py) - [generate_strobogrammtic](maths/generate_strobogrammtic.py) - [is_strobogrammatic](maths/is_strobogrammatic.py) + - [next_perfect_square](maths/next_perfect_square.py) - [nth_digit](maths/nth_digit.py) - [prime_test](maths/prime_test.py) - [primes_sieve_of_eratosthenes](maths/primes_sieve_of_eratosthenes.py) From bc79fea47a6f440d697874385b07d2283f2d0b26 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 19 Mar 2018 20:11:36 +0530 Subject: [PATCH 097/387] Update tree.md --- tree.md | 77 ++++++++++++++++++++++++++++++++++++++++----------------- 1 file changed, 55 insertions(+), 22 deletions(-) diff --git a/tree.md b/tree.md index 37d6f316b..46bb00251 100644 --- a/tree.md +++ b/tree.md @@ -28,27 +28,25 @@ │   ├── permute.py │   ├── permute_unique.py │   ├── subsets.py -│   └── subsets_unique.py +│   ├── subsets_unique.py +│   └── word_search.py ├── bfs │   ├── shortest_distance_from_all_buildings.py │   └── word_ladder.py ├── bit +│   ├── add_without_operator.py +│   ├── bytes_int_conversion.py │   ├── count_ones.py +│   ├── find_missing_number.py │   ├── power_of_two.py │   ├── reverse_bits.py │   ├── single_number2.py │   ├── single_number.py │   └── subsets.py -├── design -│   ├── alarm_system.md -│   ├── all_o_one_ds.md -│   ├── calculator.md -│   ├── excel_table.md -│   ├── LRUcache.md -│   ├── nearby_drivers.md -│   ├── ride_sharing.md -│   ├── task_runner.md -│   └── twitter_feeds.md +├── calculator +│   └── math_parser.py +├── CODE_OF_CONDUCT.md +├── CONTRIBUTING.md ├── dfs │   ├── all_factors.py │   ├── count_islands.py @@ -58,32 +56,51 @@ ├── dp │   ├── buy_sell_stock.py │   ├── climbing_stairs.py +│   ├── coin_change.py │   ├── combination_sum.py +│   ├── egg_drop.py │   ├── house_robber.py +│   ├── job_scheduling.py +│   ├── knapsack.py │   ├── longest_increasing.py +│   ├── matrix_chain_order.py │   ├── max_product_subarray.py │   ├── max_subarray.py +│   ├── min_cost_path.py │   ├── num_decodings.py │   ├── regex_matching.py +│   ├── rod_cut.py │   └── word_break.py ├── graph +│   ├── checkDiGraphStronglyConnected.py │   ├── clone_graph.py +│   ├── cycle_detection.py +│   ├── find_all_cliques.py │   ├── find_path.py │   ├── graph.py +│   ├── markov_chain.py +│   ├── minimum_spanning_tree.py +│   ├── pathBetweenTwoVerticesInDiGraph.py +│   ├── satisfiability.py +│   ├── tarjan.py +│   ├── Transitive_Closure_DFS.py │   └── traversal.py ├── heap │   ├── merge_sorted_k_lists.py │   ├── skyline.py │   └── sliding_window_max.py +├── LICENSE ├── linkedlist │   ├── add_two_numbers.py │   ├── copy_random_pointer.py │   ├── delete_node.py │   ├── first_cyclic_node.py +│   ├── intersection.py │   ├── is_cyclic.py │   ├── is_palindrome.py │   ├── kth_to_last.py │   ├── linkedlist.py +│   ├── partition.py │   ├── remove_duplicates.py │   ├── reverse.py │   ├── rotate_list.py @@ -93,34 +110,53 @@ │   ├── longest_common_subsequence.py │   ├── randomized_set.py │   └── valid_sudoku.py -├── math +├── maths +│   ├── base_conversion.py +│   ├── extended_gcd.py +│   ├── gcd.py │   ├── generate_strobogrammtic.py │   ├── is_strobogrammatic.py +│   ├── next_perfect_square.py │   ├── nth_digit.py +│   ├── primes_sieve_of_eratosthenes.py +│   ├── prime_test.py +│   ├── pythagoras.py +│   ├── rabin_miller.py +│   ├── rsa.py │   └── sqrt_precision_factor.py ├── matrix │   ├── bomb_enemy.py +│   ├── copy_transform.py +│   ├── count_paths.py │   ├── matrix_rotation.txt │   ├── rotate_image.py +│   ├── search_in_sorted_matrix.py │   ├── sparse_dot_vector.py │   ├── sparse_mul.py │   └── spiral_traversal.py -├── queue +├── queues │   ├── __init__.py │   ├── max_sliding_window.py │   ├── moving_average.py +│   ├── __pycache__ +│   │   └── __init__.cpython-36.pyc │   ├── queue.py │   ├── reconstruct_queue.py │   └── zigzagiterator.py +├── README_CN.md ├── README.md ├── search │   ├── binary_search.py -│   ├── count_elem.py │   ├── first_occurance.py │   └── last_occurance.py ├── set -│   └── randomized_set.py +│   ├── randomized_set.py +│   └── set_covering.py ├── sort +│   ├── bubble_sort.py +│   ├── comb_sort.py +│   ├── counting_sort.py +│   ├── heap_sort.py │   ├── insertion_sort.py │   ├── meeting_rooms.py │   ├── merge_sort.py @@ -131,16 +167,11 @@ │   └── wiggle_sort.py ├── stack │   ├── __init__.py -│   ├── __init__.pyc │   ├── longest_abs_path.py -│   ├── __pycache__ -│   │   ├── __init__.cpython-35.pyc -│   │   └── stack.cpython-35.pyc │   ├── simplify_path.py │   ├── stack.py -│   ├── stack.pyc │   └── valid_parenthesis.py -├── string +├── strings │   ├── add_binary.py │   ├── breaking_bad.py │   ├── decode_string.py @@ -189,6 +220,8 @@ │   ├── path_sum.py │   ├── pretty_print.py │   ├── same_tree.py +│   ├── Segment_Tree +│   │   └── segment_tree.py │   ├── traversal │   │   ├── inorder.py │   │   ├── level_order.py @@ -201,6 +234,6 @@ └── union-find └── count_islands.py -26 directories, 173 files +27 directories, 205 files ``` From 24357bd7776a230448198a2dd50b3a3def0aafd0 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Mon, 19 Mar 2018 16:13:45 +0100 Subject: [PATCH 098/387] improved the code and added a simple user interface --- calculator/math_parser.py | 28 ++++++++++++++++++++++++++-- 1 file changed, 26 insertions(+), 2 deletions(-) diff --git a/calculator/math_parser.py b/calculator/math_parser.py index df488244e..a34ded7f6 100644 --- a/calculator/math_parser.py +++ b/calculator/math_parser.py @@ -20,6 +20,7 @@ from collections import deque import re +import sys numeric_value = re.compile('\d+(\.\d+)?') @@ -89,8 +90,11 @@ def parse(expression): if len(current) > 0: result.append(current) current = "" - if i != ' ': + if (i in __operators__) or (i in __parenthesis__): result.append(i) + else: + raise Exception("invalid syntax " + i) + if len(current) > 0: result.append(current) return result @@ -104,7 +108,8 @@ def evaluate(expression): """ op_stack = deque() # operator stack out_stack = deque() # output stack (values) - for token in parse(expression): + tokens = parse(expression) # calls the function only once! + for token in tokens: if numeric_value.match(token): out_stack.append(float(token)) elif token == '(': @@ -122,3 +127,22 @@ def evaluate(expression): apply_operation(op_stack, out_stack) return out_stack[-1] + + +def main(): + """ + simple user-interface + """ + print ("\t\tCalculator\n\n") + userInput = input("expression or exit: ") + while userInput != "exit": + try: + print ("The result is {0}".format(evaluate(userInput))) + except Exception: + print ("invalid syntax!") + userInput = input("expression or exit: ") + print ("program end") + + +if __name__ == "__main__": + main() \ No newline at end of file From 06961a0aa1f075262a940249adb4e568eb0711d6 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Mon, 19 Mar 2018 20:36:53 +0100 Subject: [PATCH 099/387] maked the code more efficient and put in some comments --- matrix/bomb_enemy.py | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/matrix/bomb_enemy.py b/matrix/bomb_enemy.py index 0310c1197..9535fc6ae 100644 --- a/matrix/bomb_enemy.py +++ b/matrix/bomb_enemy.py @@ -20,15 +20,18 @@ def max_killed_enemies(grid): m, n = len(grid), len(grid[0]) max_killed = 0 row_e, col_e = 0, [0] * n + # iterates over all cells in the grid for i in range(m): for j in range(n): + # makes sure we are next to a wall. if j == 0 or grid[i][j-1] == 'W': row_e = row_kills(grid, i, j) - + # makes sure we are next to a wall. if i == 0 or grid[i-1][j] == 'W': col_e[j] = col_kills(grid, i, j) - + # makes sure the cell contains a 0 if grid[i][j] == '0': + # updates the variable max_killed = max(max_killed, row_e + col_e[j]) return max_killed @@ -36,7 +39,9 @@ def max_killed_enemies(grid): # calculate killed enemies for row i from column j def row_kills(grid, i, j): num = 0 - while j < len(grid[0]) and grid[i][j] != 'W': + # more efficient. calls the function only once! + len_row = len(grid[0]) + while j < len_row and grid[i][j] != 'W': if grid[i][j] == 'E': num += 1 j += 1 @@ -45,11 +50,14 @@ def row_kills(grid, i, j): # calculate killed enemies for column j from row i def col_kills(grid, i, j): num = 0 - while i < len(grid) and grid[i][j] != 'W': + # more efficient. calls the function only once! + len_col = len(grid) + while i < len_col and grid[i][j] != 'W': if grid[i][j] == 'E': num += 1 i += 1 return num + grid = [ ["0", "E", "0", "E"], @@ -60,3 +68,4 @@ def col_kills(grid, i, j): print(max_killed_enemies(grid)) + From b44a5d437200ce8476884841e28d34c1c7de5b18 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Mon, 19 Mar 2018 20:41:42 +0100 Subject: [PATCH 100/387] changed the pull request across the request --- calculator/math_parser.py | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/calculator/math_parser.py b/calculator/math_parser.py index a34ded7f6..0437c8c2d 100644 --- a/calculator/math_parser.py +++ b/calculator/math_parser.py @@ -20,7 +20,6 @@ from collections import deque import re -import sys numeric_value = re.compile('\d+(\.\d+)?') @@ -90,7 +89,7 @@ def parse(expression): if len(current) > 0: result.append(current) current = "" - if (i in __operators__) or (i in __parenthesis__): + if i in __operators__ or i in __parenthesis__: result.append(i) else: raise Exception("invalid syntax " + i) @@ -133,15 +132,15 @@ def main(): """ simple user-interface """ - print ("\t\tCalculator\n\n") + print("\t\tCalculator\n\n") userInput = input("expression or exit: ") while userInput != "exit": try: - print ("The result is {0}".format(evaluate(userInput))) + print("The result is {0}".format(evaluate(userInput))) except Exception: - print ("invalid syntax!") + print("invalid syntax!") userInput = input("expression or exit: ") - print ("program end") + print("program end") if __name__ == "__main__": From 2aab93d952139aa9b4eb135654cb015046c01272 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Mon, 19 Mar 2018 20:53:58 +0100 Subject: [PATCH 101/387] changed the code a little bit put in some comments and added a testsuite --- matrix/bomb_enemy.py | 37 ++++++++++++++++++++++++++++++------- 1 file changed, 30 insertions(+), 7 deletions(-) diff --git a/matrix/bomb_enemy.py b/matrix/bomb_enemy.py index 9535fc6ae..2ceec4f5a 100644 --- a/matrix/bomb_enemy.py +++ b/matrix/bomb_enemy.py @@ -15,6 +15,7 @@ # return 3. (Placing a bomb at (1,1) kills 3 enemies) + def max_killed_enemies(grid): if not grid: return 0 m, n = len(grid), len(grid[0]) @@ -59,13 +60,35 @@ def col_kills(grid, i, j): return num -grid = [ -["0", "E", "0", "E"], -["E", "E", "E", "0"], -["E", "0", "W", "E"], -["0", "E", "0", "0"]] -print(grid) -print(max_killed_enemies(grid)) +# ----------------- TESTS ------------------------- + +""" + Testsuite for the project +""" + +import unittest + +class TestBombEnemy(unittest.TestCase): + def test_3x4(self): + grid1 = [["0","E","0","0"], + ["E","0","W","E"], + ["0","E","0","0"]] + self.assertEqual(3,max_killed_enemies(grid1)) + def test_4x4(self): + grid1 = [ + ["0", "E", "0", "E"], + ["E", "E", "E", "0"], + ["E", "0", "W", "E"], + ["0", "E", "0", "0"]] + grid2 = [ + ["0", "0", "0", "E"], + ["E", "0", "0", "0"], + ["E", "0", "W", "E"], + ["0", "E", "0", "0"]] + self.assertEqual(5,max_killed_enemies(grid1)) + self.assertEqual(3,max_killed_enemies(grid2)) +if __name__ == "__main__": + unittest.main() From f32a5eb5b24397d43c028b25ec3ca7c30136c889 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Mon, 19 Mar 2018 21:53:43 +0100 Subject: [PATCH 102/387] removed the specified comment --- matrix/bomb_enemy.py | 1 - 1 file changed, 1 deletion(-) diff --git a/matrix/bomb_enemy.py b/matrix/bomb_enemy.py index 2ceec4f5a..576aab4ff 100644 --- a/matrix/bomb_enemy.py +++ b/matrix/bomb_enemy.py @@ -51,7 +51,6 @@ def row_kills(grid, i, j): # calculate killed enemies for column j from row i def col_kills(grid, i, j): num = 0 - # more efficient. calls the function only once! len_col = len(grid) while i < len_col and grid[i][j] != 'W': if grid[i][j] == 'E': From 5f5e08bd4b494061bc128af90c7e52167d0a933f Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Mon, 19 Mar 2018 23:17:32 +0100 Subject: [PATCH 103/387] and the second one --- matrix/bomb_enemy.py | 1 - 1 file changed, 1 deletion(-) diff --git a/matrix/bomb_enemy.py b/matrix/bomb_enemy.py index 576aab4ff..c963ae954 100644 --- a/matrix/bomb_enemy.py +++ b/matrix/bomb_enemy.py @@ -40,7 +40,6 @@ def max_killed_enemies(grid): # calculate killed enemies for row i from column j def row_kills(grid, i, j): num = 0 - # more efficient. calls the function only once! len_row = len(grid[0]) while j < len_row and grid[i][j] != 'W': if grid[i][j] == 'E': From 1f03d2f3aa03780971cc23731cf2adb71e7e1dfb Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 20 Mar 2018 22:28:00 +0530 Subject: [PATCH 104/387] enclosed comments in triple quotes --- matrix/bomb_enemy.py | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-) diff --git a/matrix/bomb_enemy.py b/matrix/bomb_enemy.py index c963ae954..debcf5d81 100644 --- a/matrix/bomb_enemy.py +++ b/matrix/bomb_enemy.py @@ -1,20 +1,21 @@ -# Given a 2D grid, each cell is either a wall 'W', -# an enemy 'E' or empty '0' (the number zero), -# return the maximum enemies you can kill using one bomb. -# The bomb kills all the enemies in the same row and column from -# the planted point until it hits the wall since the wall is too strong -# to be destroyed. -# Note that you can only put the bomb at an empty cell. - -# Example: -# For the given grid +""" +Given a 2D grid, each cell is either a wall 'W', +an enemy 'E' or empty '0' (the number zero), +return the maximum enemies you can kill using one bomb. +The bomb kills all the enemies in the same row and column from +the planted point until it hits the wall since the wall is too strong +to be destroyed. +Note that you can only put the bomb at an empty cell. -# 0 E 0 0 -# E 0 W E -# 0 E 0 0 +Example: +For the given grid -# return 3. (Placing a bomb at (1,1) kills 3 enemies) +0 E 0 0 +E 0 W E +0 E 0 0 +return 3. (Placing a bomb at (1,1) kills 3 enemies) +""" def max_killed_enemies(grid): if not grid: return 0 From 9787aae0a19fb1923bbf87c6c67e8b7fd0d96f85 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Sat, 24 Mar 2018 15:05:26 +0530 Subject: [PATCH 105/387] add red black tree to master (#155) * red black tree * red black tree * red black tree --- tree/rbtree/rbtree.py | 276 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 276 insertions(+) create mode 100644 tree/rbtree/rbtree.py diff --git a/tree/rbtree/rbtree.py b/tree/rbtree/rbtree.py new file mode 100644 index 000000000..87ae0b1fc --- /dev/null +++ b/tree/rbtree/rbtree.py @@ -0,0 +1,276 @@ +class RBNode: + def __init__(self, val,is_red,parent=None,left=None, right=None): + self.val = val + self.parent = parent + self.left = left + self.right = right + self.color = is_red +class RBTree: + def __init__(self): + self.root = None + def left_rotate(self, node): + #set the node as the left child node of the current node's right node + right_node = node.right + if right_node is None: + return + else: + # right node's left node become the right node of current node + node.right = right_node.left + if right_node.left is not None: + right_node.left.parent = node + right_node.parent = node.parent + #check the parent case + if node.parent is None: + self.root = right_node + elif node is node.parent.left: + node.parent.left = right_node + else: + node.parent.right = right_node + right_node.left = node + node.parent = right_node + def right_rotate(self, node): + #set the node as the right child node of the current node's left node + left_node = node.left + if left_node is None: + return + else: + # left node's right node become the left node of current node + node.left = left_node.right + if left_node.right is not None: + left_node.right.parent = node + left_node.parent = node.parent + #check the parent case + if node.parent is None: + self.root = left_node + elif node is node.parent.left: + node.parent.left = left_node + else: + node.parent.right = left_node + left_node.right = node + node.parent = left_node + def insert(self, node): + #the inserted node's color is default is red + root = self.root + insert_node_parent = None + #find the position of inserted node + while root is not None: + insert_node_parent = root + if insert_node_parent.val node.val: + #case 2 not null and find left or right + insert_node_parent.left = node + else: + insert_node_parent.right = node + node.left = None + node.right = None + node.color = 1 + # fix the tree to + self.fix_insert(node) + def fix_insert(self, node): + #case 1 the parent is null, then set the inserted node as root and color = 0 + if node.parent is None: + node.color = 0 + self.root = node + return + #case 2 the parent color is black, do nothing + #case 3 the parent color is red + while node.parent and node.parent.color is 1: + if node.parent is node.parent.parent.left: + uncle_node = node.parent.parent.right + if uncle_node and uncle_node.color is 1: + #case 3.1 the uncle node is red + #then set parent and uncle color is black and grandparent is red + #then node => node.parent + node.parent.color = 0 + node.parent.parent.right.color = 0 + node.parent.parent.color = 1 + node = node.parent.parent + continue + elif node is node.parent.right: + #case 3.2 the uncle node is black or null, and the node is right of parent + #then set his parent node is current node + #left rotate the node and continue the next + node = node.parent + self.left_rotate(node) + #case 3.3 the uncle node is black and parent node is left + #then parent node set black and grandparent set red + node.parent.color = 0 + node.parent.parent.color=1 + self.right_rotate(node.parent.parent) + else: + uncle_node = node.parent.parent.left + if uncle_node and uncle_node.color is 1: + #case 3.1 the uncle node is red + #then set parent and uncle color is black and grandparent is red + #then node => node.parent + node.parent.color = 0 + node.parent.parent.left.color = 0 + node.parent.parent.color = 1 + node = node.parent.parent + continue + elif node is node.parent.left: + #case 3.2 the uncle node is black or null, and the node is right of parent + #then set his parent node is current node + #left rotate the node and continue the next + node = node.parent + self.right_rotate(node) + #case 3.3 the uncle node is black and parent node is left + #then parent node set black and grandparent set red + node.parent.color = 0 + node.parent.parent.color=1 + self.left_rotate(node.parent.parent) + self.root.color = 0 + def transplant(self, node_u, node_v): + """ + replace u with v + :param node_u: replaced node + :param node_v: + :return: None + """ + if node_u.parent is None: + self.root = node_v + elif node_u is node_u.parent.left: + node_u.parent.left = node_v + elif node_u is node_u.parent.right: + node_u.parent.right = node_v + # check is node_v is None + if node_v: + node_v.parent = node_u.parent + def maximum(self,node): + """ + find the max node when node regard as a root node + :param node: + :return: max node + """ + temp_node = node + while temp_node.right is not None: + temp_node = temp_node.right + return temp_node + def minimum(self,node): + """ + find the minimum node when node regard as a root node + :param node: + :return: minimum node + """ + temp_node = node + while temp_node.left: + temp_node = temp_node.left + return temp_node + def delete(self,node): + # find the node position + node_color = node.color + if node.left is None: + temp_node = node.right + self.transplant(node, node.right) + elif node.right is None: + temp_node = node.left + self.transplant( node, node.left) + else: + # both child exits ,and find minimum child of right child + node_min = self.minimum(node.right) + node_color = node_min.color + temp_node = node_min.right + ## + if node_min.parent != node: + self.transplant(node_min, node_min.right) + node_min.right = node.right + node_min.right.parent = node_min + self.transplant(node, node_min) + node_min.left = node.left + node_min.left.parent = node_min + node_min.color = node.color + #when node is black ,then need to fix it with 4 cases + if node_color == 0: + self.delete_fixup(temp_node) + + def delete_fixup(self, node): + # 4 cases + while node != self.root and node.color == 0: + #node is not root and color is black + if node == node.parent.left: + # node is left node + node_brother = node.parent.right + #case 1 node's red, can not get black node + # set brother is black and parent is red + if node_brother.color == 1: + node_brother.color = 0 + node.parent.color = 1 + self.left_rotate( node.parent) + node_brother = node.parent.right + #case2:brothe node is black, and its children node is both black + if (node_brother.left is None or node_brother.left.color == 0) and \ + (node_brother.right is None or node_brother.right.color == 0): + node_brother.color = 1 + node = node.parent + else: + #case3 brother node is black , and its left child node is red and right is black + if node_brother.right is None or node_brother.right.color == 0: + node_brother.color = 1 + node_brother.left.color = 0 + self.right_rotate(node_brother) + node_brother = node.parent.right + #case4 brother node is black, and right is red, and left is any color + node_brother.color = node.parent.color + node.parent.color = 0 + node_brother.right.color = 0 + self.left_rotate(node.parent) + node = self.root + break + else: + node_brother = node.parent.left + if node_brother.color == 1: + node_brother.color = 0 + node.parent.color = 1 + self.left_rotate(node.parent) + node_brother = node.parent.right + if (node_brother.left is None or node_brother.left.color == 0) and \ + (node_brother.right is None or node_brother.right.color == 0): + node_brother.color = 1 + node = node.parent + else: + if node_brother.left is None or node_brother.left.color == 0: + node_brother.color = 1 + node_brother.right.color = 0 + self.left_rotate(node_brother) + node_brother = node.parent.left + node_brother.color = node.parent.color + node.parent.color = 0 + node_brother.left.color = 0 + self.right_rotate(node.parent) + node = self.root + break + node.color = 0 + + def inorder(self): + res = [] + if not self.root: + return res + stack = [] + root = self.root + while root or stack: + while root: + stack.append(root) + root = root.left + root = stack.pop() + res.append({'val':root.val,'color':root.color}) + root = root.right + return res +if __name__=="__main__": + rb = RBTree() + children = [11,2,14,1,7,15,5,8,4] + for child in children: + node = RBNode(child,1) + print child + rb.insert(node) + print rb.inorder() + + + \ No newline at end of file From 0b4514516bd61b9d23aad2f9921288a491735b35 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Sat, 24 Mar 2018 15:43:13 +0530 Subject: [PATCH 106/387] update README and some fixes --- CONTRIBUTING.md | 6 + README.md | 6 +- README_CN.md | 4 +- tree.md | 6 +- tree/rbtree/rbtree.py | 140 ++++++++++-------- .../segment_tree.py | 0 6 files changed, 95 insertions(+), 67 deletions(-) rename tree/{Segment_Tree => segment_tree}/segment_tree.py (100%) diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md index 8bc7832a7..7661a84c4 100644 --- a/CONTRIBUTING.md +++ b/CONTRIBUTING.md @@ -40,6 +40,12 @@ Whenever you want a new algorithm to be added, or find some bugs in the existing just [submit an issue][newissue] and feel free to discuss over it. Or you may resolve any of the [existing issues][issues]. +## Collaborators +You can ask for any help or clarifications from the collaborators. +[Keon Kim](https://github.com/keon) +[Rahul Goswami](https://github.com/goswami-rahul) +[Ankit Agarwal](https://github.com/ankit167) + [fork]: https://help.github.com/articles/fork-a-repo/ [docstr]: https://www.python.org/dev/peps/pep-0257/#multi-line-docstrings [commit]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html diff --git a/README.md b/README.md index df65941fd..aea00759a 100644 --- a/README.md +++ b/README.md @@ -200,8 +200,10 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [serialize_deserialize](tree/bst/serialize_deserialize.py) - [successor](tree/bst/successor.py) - [unique_bst](tree/bst/unique_bst.py) - - [segment-tree](tree/Segment_Tree) - - [segment_tree](tree/Segment_Tree/segment_tree.py) + - [rbtree](tree/rbtree) + - [rbtree](tree/rbtree/rbtree.py) + - [segment_tree](tree/segment_tree) + - [segment_tree](tree/segment_tree/segment_tree.py) - [traversal](tree/traversal) - [inorder](tree/traversal/inorder.py) - [level_order](tree/traversal/level_order.py) diff --git a/README_CN.md b/README_CN.md index d211b02f2..3e1bb861e 100644 --- a/README_CN.md +++ b/README_CN.md @@ -171,8 +171,8 @@ python版数据结构和算法实现的简约版小示例 - [roman_to_int：罗马数转换整数](strings/roman_to_int.py) - [word_squares：单词平方](strings/word_squares.py) - [tree：树](tree) - - [segment-tree：线段树](tree/Segment_Tree) - - [segment_tree：线段树](tree/Segment_Tree/segment_tree.py) + - [segment-tree：线段树](tree/segment_tree) + - [segment_tree：线段树](tree/segment_tree/segment_tree.py) - [binary_tree_paths：二叉树路径](tree/binary_tree_paths.py) - [bintree2list：二叉树转换链表](tree/bintree2list.py) - [bst：二叉搜索树](tree/tree/bst) diff --git a/tree.md b/tree.md index 46bb00251..9f35af3e1 100644 --- a/tree.md +++ b/tree.md @@ -219,8 +219,10 @@ │   ├── path_sum2.py │   ├── path_sum.py │   ├── pretty_print.py +│   ├── rbtree +│   │   └── rbtree.py │   ├── same_tree.py -│   ├── Segment_Tree +│   ├── segment_tree │   │   └── segment_tree.py │   ├── traversal │   │   ├── inorder.py @@ -234,6 +236,6 @@ └── union-find └── count_islands.py -27 directories, 205 files +28 directories, 206 files ``` diff --git a/tree/rbtree/rbtree.py b/tree/rbtree/rbtree.py index 87ae0b1fc..15114e082 100644 --- a/tree/rbtree/rbtree.py +++ b/tree/rbtree/rbtree.py @@ -1,15 +1,23 @@ +""" +Implementation of Red-Black tree. +""" + + class RBNode: - def __init__(self, val,is_red,parent=None,left=None, right=None): + def __init__(self, val, is_red, parent=None, left=None, right=None): self.val = val self.parent = parent self.left = left self.right = right self.color = is_red + + class RBTree: def __init__(self): self.root = None + def left_rotate(self, node): - #set the node as the left child node of the current node's right node + # set the node as the left child node of the current node's right node right_node = node.right if right_node is None: return @@ -19,7 +27,7 @@ def left_rotate(self, node): if right_node.left is not None: right_node.left.parent = node right_node.parent = node.parent - #check the parent case + # check the parent case if node.parent is None: self.root = right_node elif node is node.parent.left: @@ -28,9 +36,10 @@ def left_rotate(self, node): node.parent.right = right_node right_node.left = node node.parent = right_node + def right_rotate(self, node): - #set the node as the right child node of the current node's left node - left_node = node.left + # set the node as the right child node of the current node's left node + left_node = node.left if left_node is None: return else: @@ -39,7 +48,7 @@ def right_rotate(self, node): if left_node.right is not None: left_node.right.parent = node left_node.parent = node.parent - #check the parent case + # check the parent case if node.parent is None: self.root = left_node elif node is node.parent.left: @@ -48,24 +57,25 @@ def right_rotate(self, node): node.parent.right = left_node left_node.right = node node.parent = left_node + def insert(self, node): - #the inserted node's color is default is red + # the inserted node's color is default is red root = self.root insert_node_parent = None - #find the position of inserted node + # find the position of inserted node while root is not None: insert_node_parent = root - if insert_node_parent.val node.val: - #case 2 not null and find left or right + # case 2 not null and find left or right insert_node_parent.left = node else: insert_node_parent.right = node @@ -74,60 +84,62 @@ def insert(self, node): node.color = 1 # fix the tree to self.fix_insert(node) + def fix_insert(self, node): - #case 1 the parent is null, then set the inserted node as root and color = 0 + # case 1 the parent is null, then set the inserted node as root and color = 0 if node.parent is None: node.color = 0 self.root = node - return - #case 2 the parent color is black, do nothing - #case 3 the parent color is red + return + # case 2 the parent color is black, do nothing + # case 3 the parent color is red while node.parent and node.parent.color is 1: if node.parent is node.parent.parent.left: uncle_node = node.parent.parent.right if uncle_node and uncle_node.color is 1: - #case 3.1 the uncle node is red - #then set parent and uncle color is black and grandparent is red - #then node => node.parent + # case 3.1 the uncle node is red + # then set parent and uncle color is black and grandparent is red + # then node => node.parent node.parent.color = 0 node.parent.parent.right.color = 0 node.parent.parent.color = 1 node = node.parent.parent - continue + continue elif node is node.parent.right: - #case 3.2 the uncle node is black or null, and the node is right of parent - #then set his parent node is current node - #left rotate the node and continue the next + # case 3.2 the uncle node is black or null, and the node is right of parent + # then set his parent node is current node + # left rotate the node and continue the next node = node.parent self.left_rotate(node) - #case 3.3 the uncle node is black and parent node is left - #then parent node set black and grandparent set red + # case 3.3 the uncle node is black and parent node is left + # then parent node set black and grandparent set red node.parent.color = 0 - node.parent.parent.color=1 + node.parent.parent.color = 1 self.right_rotate(node.parent.parent) else: uncle_node = node.parent.parent.left if uncle_node and uncle_node.color is 1: - #case 3.1 the uncle node is red - #then set parent and uncle color is black and grandparent is red - #then node => node.parent + # case 3.1 the uncle node is red + # then set parent and uncle color is black and grandparent is red + # then node => node.parent node.parent.color = 0 node.parent.parent.left.color = 0 node.parent.parent.color = 1 node = node.parent.parent - continue + continue elif node is node.parent.left: - #case 3.2 the uncle node is black or null, and the node is right of parent - #then set his parent node is current node - #left rotate the node and continue the next + # case 3.2 the uncle node is black or null, and the node is right of parent + # then set his parent node is current node + # left rotate the node and continue the next node = node.parent self.right_rotate(node) - #case 3.3 the uncle node is black and parent node is left - #then parent node set black and grandparent set red + # case 3.3 the uncle node is black and parent node is left + # then parent node set black and grandparent set red node.parent.color = 0 - node.parent.parent.color=1 + node.parent.parent.color = 1 self.left_rotate(node.parent.parent) self.root.color = 0 + def transplant(self, node_u, node_v): """ replace u with v @@ -144,7 +156,8 @@ def transplant(self, node_u, node_v): # check is node_v is None if node_v: node_v.parent = node_u.parent - def maximum(self,node): + + def maximum(self, node): """ find the max node when node regard as a root node :param node: @@ -154,17 +167,19 @@ def maximum(self,node): while temp_node.right is not None: temp_node = temp_node.right return temp_node - def minimum(self,node): + + def minimum(self, node): """ find the minimum node when node regard as a root node - :param node: + :param node: :return: minimum node """ temp_node = node while temp_node.left: temp_node = temp_node.left return temp_node - def delete(self,node): + + def delete(self, node): # find the node position node_color = node.color if node.left is None: @@ -172,7 +187,7 @@ def delete(self,node): self.transplant(node, node.right) elif node.right is None: temp_node = node.left - self.transplant( node, node.left) + self.transplant(node, node.left) else: # both child exits ,and find minimum child of right child node_min = self.minimum(node.right) @@ -187,37 +202,41 @@ def delete(self,node): node_min.left = node.left node_min.left.parent = node_min node_min.color = node.color - #when node is black ,then need to fix it with 4 cases + # when node is black ,then need to fix it with 4 cases if node_color == 0: self.delete_fixup(temp_node) def delete_fixup(self, node): # 4 cases while node != self.root and node.color == 0: - #node is not root and color is black + # node is not root and color is black if node == node.parent.left: # node is left node node_brother = node.parent.right - #case 1 node's red, can not get black node + + # case 1: node's red, can not get black node # set brother is black and parent is red if node_brother.color == 1: node_brother.color = 0 node.parent.color = 1 - self.left_rotate( node.parent) + self.left_rotate(node.parent) node_brother = node.parent.right - #case2:brothe node is black, and its children node is both black - if (node_brother.left is None or node_brother.left.color == 0) and \ - (node_brother.right is None or node_brother.right.color == 0): + + # case 2: brother node is black, and its children node is both black + if (node_brother.left is None or node_brother.left.color == 0) and ( + node_brother.right is None or node_brother.right.color == 0): node_brother.color = 1 node = node.parent else: - #case3 brother node is black , and its left child node is red and right is black + + # case 3: brother node is black , and its left child node is red and right is black if node_brother.right is None or node_brother.right.color == 0: node_brother.color = 1 node_brother.left.color = 0 self.right_rotate(node_brother) node_brother = node.parent.right - #case4 brother node is black, and right is red, and left is any color + + # case 4: brother node is black, and right is red, and left is any color node_brother.color = node.parent.color node.parent.color = 0 node_brother.right.color = 0 @@ -231,8 +250,8 @@ def delete_fixup(self, node): node.parent.color = 1 self.left_rotate(node.parent) node_brother = node.parent.right - if (node_brother.left is None or node_brother.left.color == 0) and \ - (node_brother.right is None or node_brother.right.color == 0): + if (node_brother.left is None or node_brother.left.color == 0) and ( + node_brother.right is None or node_brother.right.color == 0): node_brother.color = 1 node = node.parent else: @@ -260,17 +279,16 @@ def inorder(self): stack.append(root) root = root.left root = stack.pop() - res.append({'val':root.val,'color':root.color}) + res.append({'val': root.val, 'color': root.color}) root = root.right return res -if __name__=="__main__": + + +if __name__ == "__main__": rb = RBTree() - children = [11,2,14,1,7,15,5,8,4] + children = [11, 2, 14, 1, 7, 15, 5, 8, 4] for child in children: - node = RBNode(child,1) - print child - rb.insert(node) - print rb.inorder() - - - \ No newline at end of file + node = RBNode(child, 1) + print(child) + rb.insert(node) + print(rb.inorder()) diff --git a/tree/Segment_Tree/segment_tree.py b/tree/segment_tree/segment_tree.py similarity index 100% rename from tree/Segment_Tree/segment_tree.py rename to tree/segment_tree/segment_tree.py From a532648c2c8c049a4449918780abad663f989777 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Sat, 24 Mar 2018 16:16:08 +0530 Subject: [PATCH 107/387] update readme --- README.md | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/README.md b/README.md index aea00759a..780783459 100644 --- a/README.md +++ b/README.md @@ -230,3 +230,12 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [tree](tree/tree.py) - [union-find](union-find) - [count_islands](union-find/count_islands.py) + +## Contributors +The repo is maintained by +[Keon Kim]() +[Rahul Goswami]() +[Ankit Agarwal]() + +And thanks to [all the contributors](https://github.com/keon/algorithms/graphs/contributors) +who helped in building the repo. \ No newline at end of file From 020c677e26b45c6481a994864280663f582850fc Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Sat, 24 Mar 2018 16:25:11 +0530 Subject: [PATCH 108/387] update readme --- README.md | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/README.md b/README.md index 780783459..01835243c 100644 --- a/README.md +++ b/README.md @@ -233,9 +233,9 @@ Thanks for your interest in contributing! There are many ways to contribute to t ## Contributors The repo is maintained by -[Keon Kim]() -[Rahul Goswami]() -[Ankit Agarwal]() +[Keon Kim](https://github.com/keon) +[Rahul Goswami](https://github.com/goswami-rahul) +[Ankit Agarwal](https://github.com/ankit167) And thanks to [all the contributors](https://github.com/keon/algorithms/graphs/contributors) who helped in building the repo. \ No newline at end of file From 6ffea922e0bfa62755516f64b70f497576ffa21d Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sun, 25 Mar 2018 16:41:32 +0200 Subject: [PATCH 109/387] added a testsuite and two functions for converting --- linkedlist/add_two_numbers.py | 100 ++++++++++++++++++++++++++++++---- 1 file changed, 88 insertions(+), 12 deletions(-) diff --git a/linkedlist/add_two_numbers.py b/linkedlist/add_two_numbers.py index 2f6d67513..719b0bf01 100644 --- a/linkedlist/add_two_numbers.py +++ b/linkedlist/add_two_numbers.py @@ -11,6 +11,7 @@ Output: 7 -> 0 -> 8 """ +import unittest class Node: def __init__(self, x): @@ -38,16 +39,91 @@ def add_two_numbers(left:"Node", right:"Node")->"Node": return head.next +def convert_to_list(number : int) -> "Node": + """ + converts a positive integer into a (reversed) linked list. + for example: give 112 + result 2 -> 1 -> 1 + """ + if number >= 0: + head = Node(0) + current = head + remainder = number % 10 + quotient = number // 10 + + while quotient != 0: + current.next = Node(remainder) + current = current.next + remainder = quotient % 10 + quotient //= 10 + current.next = Node(remainder) + return head.next + else: + print("number must be positive!") + + +def convert_to_str(l : "Node") -> str: + """ + converts the non-negative number list into a string. + """ + result = "" + while l: + result += str(l.val) + l = l.next + return result + + +class Testsuite(unittest.TestCase): + """ + testsuite for the linked list structure and + the adding function, above. + """ + def test_convert_to_str(self): + number1 = Node(2) + number1.next = Node(4) + number1.next.next = Node(3) + self.assertEqual("243",convert_to_str(number1)) + def test_add_two_numbers(self): + # 1. test case + number1 = Node(2) + number1.next = Node(4) + number1.next.next = Node(3) + number2 = Node(5) + number2.next = Node(6) + number2.next.next = Node(4) + result = convert_to_str(add_two_numbers(number1,number2)) + self.assertEqual("708",result) + + # 2. test case + number3 = Node(1) + number3.next = Node(1) + number3.next.next = Node(9) + number4 = Node(1) + number4.next = Node(0) + number4.next.next = Node(1) + result = convert_to_str(add_two_numbers(number3,number4)) + self.assertEqual("2101",result) + + # 3. test case + number5 = Node(1) + number6 = Node(0) + result = convert_to_str(add_two_numbers(number5,number6)) + self.assertEqual("1",result) + + # 4. test case + number7 = Node(9) + number7.next = Node(1) + number7.next.next = Node(1) + number8 = Node(1) + number8.next = Node(0) + number8.next.next = Node(1) + result = convert_to_str(add_two_numbers(number7,number8)) + self.assertEqual("022",result) + def test_convert_to_list(self): + result = convert_to_str(convert_to_list(112)) + self.assertEqual("211",result) + + if __name__ == "__main__": - left = Node(2) - left.next = Node(4) - left.next.next = Node(3) - - right = Node(5) - right.next = Node(6) - right.next.next = Node(4) - - res = add_two_numbers(left, right) - while res: - print(res.val) - res = res.next + unittest.main() + From f92c5e3b374b85e237de8b4bba28a9afee95d29f Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sun, 25 Mar 2018 19:19:26 +0200 Subject: [PATCH 110/387] fixed peek() method of the ArrayStack --- stack/stack.py | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/stack/stack.py b/stack/stack.py index d79936379..e367ccb32 100644 --- a/stack/stack.py +++ b/stack/stack.py @@ -53,9 +53,12 @@ def pop(self): return value def peek(self): + """ + returns the current top element of the stack. + """ if self.isEmpty(): raise IndexError("stack is empty") - return self.array[self.top] + return self.array[self.top -1] def expand(self): """ From 974103163b51534c2fb01795bf1628dd916770a4 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sun, 25 Mar 2018 19:51:39 +0200 Subject: [PATCH 111/387] stack: added a test suite for the stack.py --- stack/stack.py | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) diff --git a/stack/stack.py b/stack/stack.py index e367ccb32..b5800437d 100644 --- a/stack/stack.py +++ b/stack/stack.py @@ -12,6 +12,8 @@ # size() returns the number of items on the stack. # It needs no parameters and returns an integer. +import unittest + class AbstractStack: def __init__(self): self.top = 0 @@ -114,3 +116,65 @@ def __iter__(self): raise StopIteration yield probe.value probe = probe.next + + +class TestSuite (unittest.TestCase): + """ + Test suite for the stack data structures (above) + """ + def test_ArrayStack(self): + stack = ArrayStack() + stack.push(1) + stack.push(2) + stack.push(3) + # test __iter__() + it = stack.__iter__() + self.assertEqual(3,next(it)) + self.assertEqual(2,next(it)) + self.assertEqual(1,next(it)) + try: + next(it) + self.assertTrue(False) + except: + self.assertTrue(True) + # test __len__() + self.assertEqual(3,stack.__len__()) + # test isEmpty() + self.assertFalse(stack.isEmpty()) + # test peek() + self.assertEqual(3,stack.peek()) + # test pop() + self.assertEqual(3,stack.pop()) + self.assertEqual(2,stack.pop()) + self.assertEqual(1,stack.pop()) + self.assertTrue(stack.isEmpty()) + def test_LinkedListStack(self): + stack = LinkedListStack() + stack.push(1) + stack.push(2) + stack.push(3) + # test __iter__() + it = stack.__iter__() + self.assertEqual(3,next(it)) + self.assertEqual(2,next(it)) + self.assertEqual(1,next(it)) + try: + next(it) + self.assertTrue(False) + except: + self.assertTrue(True) + # test __len__() + self.assertEqual(3,stack.__len__()) + # test isEmpty() + self.assertFalse(stack.isEmpty()) + # test peek() + self.assertEqual(3,stack.peek()) + # test pop() + self.assertEqual(3,stack.pop()) + self.assertEqual(2,stack.pop()) + self.assertEqual(1,stack.pop()) + self.assertTrue(stack.isEmpty()) + + +if __name__ == "__main__": + unittest.main() \ No newline at end of file From 372f3aaed2f789df34ea3641e592598ebe7869a8 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sun, 25 Mar 2018 21:36:56 +0200 Subject: [PATCH 112/387] removed quotes --- linkedlist/add_two_numbers.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/linkedlist/add_two_numbers.py b/linkedlist/add_two_numbers.py index 719b0bf01..f772b87e0 100644 --- a/linkedlist/add_two_numbers.py +++ b/linkedlist/add_two_numbers.py @@ -19,7 +19,7 @@ def __init__(self, x): self.next = None -def add_two_numbers(left:"Node", right:"Node")->"Node": +def add_two_numbers(left: Node, right: Node )-> Node: head = Node(0) current = head sum = 0 @@ -39,7 +39,7 @@ def add_two_numbers(left:"Node", right:"Node")->"Node": return head.next -def convert_to_list(number : int) -> "Node": +def convert_to_list(number : int) -> Node: """ converts a positive integer into a (reversed) linked list. for example: give 112 @@ -62,7 +62,7 @@ def convert_to_list(number : int) -> "Node": print("number must be positive!") -def convert_to_str(l : "Node") -> str: +def convert_to_str(l : Node) -> str: """ converts the non-negative number list into a string. """ From 83cbdd98a8582dc0bccbcb061e2307e779978b1b Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Mon, 26 Mar 2018 16:04:13 +0200 Subject: [PATCH 113/387] valid_parenthesis.py: added a testsuite --- stack/valid_parenthesis.py | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-) diff --git a/stack/valid_parenthesis.py b/stack/valid_parenthesis.py index 7b89734c3..0f896c765 100644 --- a/stack/valid_parenthesis.py +++ b/stack/valid_parenthesis.py @@ -7,8 +7,9 @@ "()" and "()[]{}" are all valid but "(]" and "([)]" are not. """ +import unittest -def is_valid(s:"str")->"bool": +def is_valid(s : str)-> bool: stack = [] dic = { ")":"(", "}":"{", @@ -25,14 +26,17 @@ def is_valid(s:"str")->"bool": return stack == [] +class TestSuite (unittest.TestCase): + """ + test suite for the function (above) + """ + def test_is_valid(self): + self.assertTrue(is_valid("[]")) + self.assertTrue(is_valid("[]()[]")) + self.assertFalse(is_valid("[[[]]")) + self.assertTrue(is_valid("{([])}")) + self.assertFalse(is_valid("(}")) + + if __name__ == "__main__": - paren = "[]" - print(paren, is_valid(paren)) - paren = "[]()[]" - print(paren, is_valid(paren)) - paren = "[[[]]" - print(paren, is_valid(paren)) - paren = "{([])}" - print(paren, is_valid(paren)) - paren = "(}" - print(paren, is_valid(paren)) + unittest.main() \ No newline at end of file From 5eab29c9311f8a42855bc6bb44e229ea1699bc82 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Mon, 26 Mar 2018 16:17:56 +0200 Subject: [PATCH 114/387] removed unnecessary else --- maths/prime_test.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/maths/prime_test.py b/maths/prime_test.py index 128fdecaa..2f5ab86a1 100644 --- a/maths/prime_test.py +++ b/maths/prime_test.py @@ -27,9 +27,9 @@ def prime_test2(n): # print(num, "is not a prime number") # print(i, "times", num//i, "is", num) return False - else: - # print(num, "is a prime number") - return True + + # print(num, "is a prime number") + return True # if input number is less than # or equal to 1, it is not prime From e651b18e0640a4ea0d9577724ef639d09e7e9321 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Mon, 26 Mar 2018 16:24:13 +0200 Subject: [PATCH 115/387] prime_test.py : added a test suite --- maths/prime_test.py | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) diff --git a/maths/prime_test.py b/maths/prime_test.py index 2f5ab86a1..05a069f34 100644 --- a/maths/prime_test.py +++ b/maths/prime_test.py @@ -1,7 +1,7 @@ """ prime_test(n) returns a True if n is a prime number else it returns False """ - +import unittest def prime_test(n): if n <= 1: @@ -35,3 +35,29 @@ def prime_test2(n): # or equal to 1, it is not prime else: return False + + +class TestSuite (unittest.TestCase): + def test_prime_test(self): + """ + checks all prime numbers between 2 up to 100. + Between 2 up to 100 exists 25 prime numbers! + """ + counter = 0 + for i in range(2,101): + if prime_test(i): + counter += 1 + self.assertEqual(25,counter) + def test_prime_test2(self): + """ + checks all prime numbers between 2 up to 100. + Between 2 up to 100 exists 25 prime numbers! + """ + counter = 0 + for i in range(2,101): + if prime_test(i): + counter += 1 + self.assertEqual(25,counter) + +if __name__ == "__main__": + unittest.main() \ No newline at end of file From 65015dc0b254619670e6d09e1f1d58088c8ed1a1 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 26 Mar 2018 22:47:08 +0530 Subject: [PATCH 116/387] minor pep fix --- stack/valid_parenthesis.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/stack/valid_parenthesis.py b/stack/valid_parenthesis.py index 0f896c765..eb64ff2ba 100644 --- a/stack/valid_parenthesis.py +++ b/stack/valid_parenthesis.py @@ -9,7 +9,7 @@ import unittest -def is_valid(s : str)-> bool: +def is_valid(s: str) -> bool: stack = [] dic = { ")":"(", "}":"{", @@ -39,4 +39,4 @@ def test_is_valid(self): if __name__ == "__main__": - unittest.main() \ No newline at end of file + unittest.main() From bcca8b5ce970584624521908ef679fb70beb1f04 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 26 Mar 2018 23:24:23 +0530 Subject: [PATCH 117/387] Update garage.py --- array/garage.py | 32 ++++++++++++++++---------------- 1 file changed, 16 insertions(+), 16 deletions(-) diff --git a/array/garage.py b/array/garage.py index a8ad7ae05..031430475 100644 --- a/array/garage.py +++ b/array/garage.py @@ -1,22 +1,23 @@ -# There is a parking lot with only one empty spot. Given the initial state -# of the parking lot and the final state. Each step we are only allowed to -# move a car -# out of its place and move it into the empty spot. -# The goal is to find out the least movement needed to rearrange -# the parking lot from the initial state to the final state. +""" +There is a parking lot with only one empty spot. Given the initial state +of the parking lot and the final state. Each step we are only allowed to +move a car +out of its place and move it into the empty spot. +The goal is to find out the least movement needed to rearrange +the parking lot from the initial state to the final state. -# Say the initial state is an array: +Say the initial state is an array: -# [1,2,3,0,4], -# where 1,2,3,4 are different cars, and 0 is the empty spot. +[1, 2, 3, 0, 4], +where 1, 2, 3, 4 are different cars, and 0 is the empty spot. -# And the final state is +And the final state is -# [0,3,2,1,4]. -# We can swap 1 with 0 in the initial array to get [0,2,3,1,4] and so on. -# Each step swap with 0 only. -# Edited by cyberking-saga -""" +[0, 3, 2, 1, 4]. +We can swap 1 with 0 in the initial array to get [0, 2, 3, 1, 4] and so on. +Each step swap with 0 only. + +Edit: Now also prints the sequence of changes in states. Output of this example :- @@ -28,7 +29,6 @@ 2 0 3 1 4 2 3 0 1 4 0 3 2 1 4 - """ From eebccffe56f4960ea8733d2b24db08562827ff6e Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 26 Mar 2018 01:17:06 +0530 Subject: [PATCH 118/387] stack.py some refactor --- stack/stack.py | 166 +++++++++++++++++++++++++++---------------------- 1 file changed, 91 insertions(+), 75 deletions(-) diff --git a/stack/stack.py b/stack/stack.py index b5800437d..fff53a1e9 100644 --- a/stack/stack.py +++ b/stack/stack.py @@ -1,28 +1,30 @@ -# Stack Abstract Data Type (ADT) -# Stack() creates a new stack that is empty. -# It needs no parameters and returns an empty stack. -# push(item) adds a new item to the top of the stack. -# It needs the item and returns nothing. -# pop() removes the top item from the stack. -# It needs no parameters and returns the item. The stack is modified. -# peek() returns the top item from the stack but does not remove it. -# It needs no parameters. The stack is not modified. -# isEmpty() tests to see whether the stack is empty. -# It needs no parameters and returns a boolean value. -# size() returns the number of items on the stack. -# It needs no parameters and returns an integer. - +""" +Stack Abstract Data Type (ADT) +Stack() creates a new stack that is empty. + It needs no parameters and returns an empty stack. +push(item) adds a new item to the top of the stack. + It needs the item and returns nothing. +pop() removes the top item from the stack. + It needs no parameters and returns the item. The stack is modified. +peek() returns the top item from the stack but does not remove it. + It needs no parameters. The stack is not modified. +isEmpty() tests to see whether the stack is empty. + It needs no parameters and returns a boolean value. +size() returns the number of items on the stack. + It needs no parameters and returns an integer. +""" import unittest + class AbstractStack: def __init__(self): - self.top = 0 + self.top = -1 - def isEmpty(self): - return self.top == 0 + def is_empty(self): + return self.top == -1 def __len__(self): - return self.top + return self.top + 1 def __str__(self): result = '------\n' @@ -30,6 +32,10 @@ def __str__(self): result += str(element) + '\n' return result[:-1] + '\n------' + def __iter__(self): + raise NotImplementedError + + class ArrayStack(AbstractStack): def __init__(self, size=10): """ @@ -37,57 +43,55 @@ def __init__(self, size=10): Python List type is a dynamic array, so we have to restrict its dynamic nature to make it work like a static array. """ - AbstractStack.__init__(self) + super().__init__() + self.top = -1 self.array = [None] * size def push(self, value): + self.top += 1 if self.top == len(self.array): self.expand() self.array[self.top] = value - self.top += 1 def pop(self): - if self.isEmpty(): + if self.is_empty(): raise IndexError("stack is empty") - value = self.array[self.top - 1] - self.array[self.top - 1] = None + value = self.array[self.top] self.top -= 1 return value def peek(self): - """ - returns the current top element of the stack. - """ - if self.isEmpty(): + """returns the current top element of the stack.""" + if self.is_empty(): raise IndexError("stack is empty") - return self.array[self.top -1] + return self.array[self.top] def expand(self): """ expands size of the array. Time Complexity: O(n) """ - newArray = [None] * len(self.array) * 2 # double the size of the array - for i, element in enumerate(self.array): - newArray[i] = element - self.array = newArray + self.array += [None] * len(self.array) # double the size of the array def __iter__(self): - probe = self.top - 1 + probe = self.top while True: - if probe < 0: + if probe == -1: raise StopIteration yield self.array[probe] probe -= 1 + class StackNode(object): + """Represents a single stack node.""" def __init__(self, value): self.value = value self.next = None + class LinkedListStack(AbstractStack): def __init__(self): - AbstractStack.__init__(self) + super().__init__() self.head = None def push(self, value): @@ -97,7 +101,7 @@ def push(self, value): self.top += 1 def pop(self): - if self.isEmpty(): + if self.is_empty(): raise IndexError("stack is empty") value = self.head.value self.head = self.head.next @@ -105,7 +109,7 @@ def pop(self): return value def peek(self): - if self.isEmpty(): + if self.is_empty(): raise IndexError("stack is empty") return self.head.value @@ -117,64 +121,76 @@ def __iter__(self): yield probe.value probe = probe.next + # optional + """ + def is_empty(self): + return self.head is None + """ + -class TestSuite (unittest.TestCase): +class TestSuite(unittest.TestCase): """ Test suite for the stack data structures (above) """ + def test_ArrayStack(self): stack = ArrayStack() stack.push(1) stack.push(2) stack.push(3) + # test __iter__() - it = stack.__iter__() - self.assertEqual(3,next(it)) - self.assertEqual(2,next(it)) - self.assertEqual(1,next(it)) - try: - next(it) - self.assertTrue(False) - except: - self.assertTrue(True) + it = iter(stack) + self.assertEqual(3, next(it)) + self.assertEqual(2, next(it)) + self.assertEqual(1, next(it)) + self.assertRaises(StopIteration, next, it) + # test __len__() - self.assertEqual(3,stack.__len__()) - # test isEmpty() - self.assertFalse(stack.isEmpty()) + self.assertEqual(3, len(stack)) + + # test is_empty() + self.assertFalse(stack.is_empty()) + # test peek() - self.assertEqual(3,stack.peek()) + self.assertEqual(3, stack.peek()) + # test pop() - self.assertEqual(3,stack.pop()) - self.assertEqual(2,stack.pop()) - self.assertEqual(1,stack.pop()) - self.assertTrue(stack.isEmpty()) + self.assertEqual(3, stack.pop()) + self.assertEqual(2, stack.pop()) + self.assertEqual(1, stack.pop()) + + self.assertTrue(stack.is_empty()) + def test_LinkedListStack(self): stack = LinkedListStack() stack.push(1) stack.push(2) stack.push(3) + # test __iter__() - it = stack.__iter__() - self.assertEqual(3,next(it)) - self.assertEqual(2,next(it)) - self.assertEqual(1,next(it)) - try: - next(it) - self.assertTrue(False) - except: - self.assertTrue(True) + it = iter(stack) + self.assertEqual(3, next(it)) + self.assertEqual(2, next(it)) + self.assertEqual(1, next(it)) + self.assertRaises(StopIteration, next, it) + # test __len__() - self.assertEqual(3,stack.__len__()) - # test isEmpty() - self.assertFalse(stack.isEmpty()) + self.assertEqual(3, len(stack)) + + # test is_empty() + self.assertFalse(stack.is_empty()) + # test peek() - self.assertEqual(3,stack.peek()) + self.assertEqual(3, stack.peek()) + # test pop() - self.assertEqual(3,stack.pop()) - self.assertEqual(2,stack.pop()) - self.assertEqual(1,stack.pop()) - self.assertTrue(stack.isEmpty()) - - + self.assertEqual(3, stack.pop()) + self.assertEqual(2, stack.pop()) + self.assertEqual(1, stack.pop()) + + self.assertTrue(stack.is_empty()) + + if __name__ == "__main__": - unittest.main() \ No newline at end of file + unittest.main() From e5b8a3a7a7d5deaebf18d1facf3d31bb26e2888a Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 27 Mar 2018 00:48:30 +0530 Subject: [PATCH 119/387] Fixed the Queue implementations and many refactors --- queues/queue.py | 192 ++++++++++++++++++++++++++----------- stack/simplify_path.py | 14 ++- stack/stack.py | 31 +++--- stack/valid_parenthesis.py | 13 +-- 4 files changed, 168 insertions(+), 82 deletions(-) diff --git a/queues/queue.py b/queues/queue.py index 6ce4ea6e2..975e73e39 100644 --- a/queues/queue.py +++ b/queues/queue.py @@ -1,71 +1,78 @@ -# Queue Abstract Data Type (ADT) -# * Queue() creates a new queue that is empty. -# It needs no parameters and returns an empty queue. -# * enqueue(item) adds a new item to the rear of the queue. -# It needs the item and returns nothing. -# * dequeue() removes the front item from the queue. -# It needs no parameters and returns the item. The queue is modified. -# * isEmpty() tests to see whether the queue is empty. -# It needs no parameters and returns a boolean value. -# * size() returns the number of items in the queue. -# It needs no parameters and returns an integer. +""" +Queue Abstract Data Type (ADT) +* Queue() creates a new queue that is empty. + It needs no parameters and returns an empty queue. +* enqueue(item) adds a new item to the rear of the queue. + It needs the item and returns nothing. +* dequeue() removes the front item from the queue. + It needs no parameters and returns the item. The queue is modified. +* isEmpty() tests to see whether the queue is empty. + It needs no parameters and returns a boolean value. +* size() returns the number of items in the queue. + It needs no parameters and returns an integer. +* peek() returns the front element of the queue. +""" +import unittest + class AbstractQueue: def __init__(self): - self.top = 0 + self._size = 0 - def isEmpty(self): - return self.top == 0 + def is_empty(self): + return self._size == 0 def __len__(self): - return self.top + return self._size class ArrayQueue(AbstractQueue): - def __init__(self, size=10): + def __init__(self, capacity=10): """ - Initialize python List with size of 10 or user given input. + Initialize python List with capacity of 10 or user given input. Python List type is a dynamic array, so we have to restrict its dynamic nature to make it work like a static array. """ AbstractQueue.__init__(self) - self.array = [None] * size - self.front = 0 - self.rear = 0 + self._array = [None] * capacity + self._front = 0 + self._rear = 0 def enqueue(self, value): - if self.rear == len(self.array): + if self._rear == len(self._array): self.expand() - self.array[self.rear] = value - self.rear += 1 - self.top += 1 + self._array[self._rear] = value + self._rear += 1 + self._size += 1 def dequeue(self): - if self.isEmpty(): + if self.is_empty(): raise IndexError("Queue is empty") - value = self.array[self.front] - self.array[self.front] = None - self.front -= 1 - self.top -= 1 + value = self._array[self._front] + self._array[self._front] = None + self._front += 1 + self._size -= 1 return value def expand(self): - """ - expands size of the array. + """expands size of the array. Time Complexity: O(n) """ - new_array = [None] * len(self.array) * 2 # double the size of the array - for i, element in enumerate(self.array): - new_array[i] = element - self.array = new_array + self._array += [None] * len(self._array) + + def peek(self): + """returns the front element of queue.""" + if self.is_empty(): + raise IndexError("Queue is empty") + return self._array[self._front] def __iter__(self): - probe = self.rear + probe = self._front while True: - if probe < 0: + if probe == self._rear: raise StopIteration - yield self.array[probe] - probe -= 1 + yield self._array[probe] + probe += 1 class QueueNode(object): @@ -77,33 +84,39 @@ def __init__(self, value): class LinkedListQueue(AbstractQueue): def __init__(self): AbstractQueue.__init__(self) - self.front = None - self.rear = None + self._front = None + self._rear = None def enqueue(self, value): node = QueueNode(value) - if not self.front: - self.front = node - self.rear = node + if self._front is None: + self._front = node + self._rear = node else: - self.rear.next = node - self.rear = node - self.top += 1 + self._rear.next = node + self._rear = node + self._size += 1 def dequeue(self): - if self.isEmpty(): + if self.is_empty(): raise IndexError("Queue is empty") - value = self.front.value - if self.front is self.rear: - self.front = None - self.rear = None + value = self._front.value + if self._front is self._rear: + self._front = None + self._rear = None else: - self.front = self.front.next - self.top -= 1 + self._front = self._front.next + self._size -= 1 return value + def peek(self): + """returns the front element of queue.""" + if self.is_empty(): + raise IndexError("Queue is empty") + return self._front.value + def __iter__(self): - probe = self.rear + probe = self._front while True: if probe is None: raise StopIteration @@ -111,5 +124,74 @@ def __iter__(self): probe = probe.next +# TODO class HeapPriorityQueue(AbstractQueue): pass + + +class TestSuite(unittest.TestCase): + """ + Test suite for the Queue data structures. + """ + + def test_ArrayQueue(self): + queue = ArrayQueue() + queue.enqueue(1) + queue.enqueue(2) + queue.enqueue(3) + + # test __iter__() + it = iter(queue) + self.assertEqual(1, next(it)) + self.assertEqual(2, next(it)) + self.assertEqual(3, next(it)) + self.assertRaises(StopIteration, next, it) + + # test __len__() + self.assertEqual(3, len(queue)) + + # test is_empty() + self.assertFalse(queue.is_empty()) + + # test peek() + self.assertEqual(1, queue.peek()) + + # test dequeue() + self.assertEqual(1, queue.dequeue()) + self.assertEqual(2, queue.dequeue()) + self.assertEqual(3, queue.dequeue()) + + self.assertTrue(queue.is_empty()) + + def test_LinkedListQueue(self): + queue = LinkedListQueue() + queue.enqueue(1) + queue.enqueue(2) + queue.enqueue(3) + + # test __iter__() + it = iter(queue) + self.assertEqual(1, next(it)) + self.assertEqual(2, next(it)) + self.assertEqual(3, next(it)) + self.assertRaises(StopIteration, next, it) + + # test __len__() + self.assertEqual(3, len(queue)) + + # test is_empty() + self.assertFalse(queue.is_empty()) + + # test peek() + self.assertEqual(1, queue.peek()) + + # test dequeue() + self.assertEqual(1, queue.dequeue()) + self.assertEqual(2, queue.dequeue()) + self.assertEqual(3, queue.dequeue()) + + self.assertTrue(queue.is_empty()) + + +if __name__ == "__main__": + unittest.main() diff --git a/stack/simplify_path.py b/stack/simplify_path.py index c6b7c7a5a..fba0adefb 100644 --- a/stack/simplify_path.py +++ b/stack/simplify_path.py @@ -11,12 +11,13 @@ In this case, you should ignore redundant slashes and return "/home/foo". """ + def simplify_path(path): """ :type path: str :rtype: str """ - skip = set(['..','.','']) + skip = {'..', '.', ''} stack = [] paths = path.split('/') for tok in paths: @@ -25,8 +26,11 @@ def simplify_path(path): stack.pop() elif tok not in skip: stack.append(tok) - return '/' +'/'.join(stack) + return '/' + '/'.join(stack) + + +if __name__ == '__main__': -p = '/my/name/is/..//keon' -print(p) -print(simplify_path(p)) + p = '/my/name/is/..//keon' + print(p) + print(simplify_path(p)) diff --git a/stack/stack.py b/stack/stack.py index fff53a1e9..9ce27f1c0 100644 --- a/stack/stack.py +++ b/stack/stack.py @@ -18,13 +18,13 @@ class AbstractStack: def __init__(self): - self.top = -1 + self._top = -1 def is_empty(self): - return self.top == -1 + return self._top == -1 def __len__(self): - return self.top + 1 + return self._top + 1 def __str__(self): result = '------\n' @@ -44,41 +44,40 @@ def __init__(self, size=10): dynamic nature to make it work like a static array. """ super().__init__() - self.top = -1 - self.array = [None] * size + self._array = [None] * size def push(self, value): - self.top += 1 - if self.top == len(self.array): + self._top += 1 + if self._top == len(self._array): self.expand() - self.array[self.top] = value + self._array[self._top] = value def pop(self): if self.is_empty(): raise IndexError("stack is empty") - value = self.array[self.top] - self.top -= 1 + value = self._array[self._top] + self._top -= 1 return value def peek(self): """returns the current top element of the stack.""" if self.is_empty(): raise IndexError("stack is empty") - return self.array[self.top] + return self._array[self._top] def expand(self): """ expands size of the array. Time Complexity: O(n) """ - self.array += [None] * len(self.array) # double the size of the array + self._array += [None] * len(self._array) # double the size of the array def __iter__(self): - probe = self.top + probe = self._top while True: if probe == -1: raise StopIteration - yield self.array[probe] + yield self._array[probe] probe -= 1 @@ -98,14 +97,14 @@ def push(self, value): node = StackNode(value) node.next = self.head self.head = node - self.top += 1 + self._top += 1 def pop(self): if self.is_empty(): raise IndexError("stack is empty") value = self.head.value self.head = self.head.next - self.top -= 1 + self._top -= 1 return value def peek(self): diff --git a/stack/valid_parenthesis.py b/stack/valid_parenthesis.py index eb64ff2ba..1101b9916 100644 --- a/stack/valid_parenthesis.py +++ b/stack/valid_parenthesis.py @@ -9,24 +9,25 @@ import unittest + def is_valid(s: str) -> bool: stack = [] - dic = { ")":"(", - "}":"{", - "]":"["} + dic = {")": "(", + "}": "{", + "]": "["} for char in s: if char in dic.values(): stack.append(char) elif char in dic.keys(): - if stack == []: + if not stack: return False s = stack.pop() if dic[char] != s: return False - return stack == [] + return not stack -class TestSuite (unittest.TestCase): +class TestSuite(unittest.TestCase): """ test suite for the function (above) """ From 7fede979630a2897322a61f7ecf445a71e6df9b8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Josip=20Haboi=C4=87?= Date: Mon, 26 Mar 2018 22:17:32 +0200 Subject: [PATCH 120/387] FIX flake8 errors, add test, refactor --- array/circular_counter.py | 62 +++++++++---------- array/flatten.py | 46 ++++++++------ array/longest_non_repeat.py | 43 ++++++++----- array/merge_intervals.py | 117 +++++++++++++++++++++++------------- 4 files changed, 159 insertions(+), 109 deletions(-) diff --git a/array/circular_counter.py b/array/circular_counter.py index 1fea4f688..f7d528a13 100644 --- a/array/circular_counter.py +++ b/array/circular_counter.py @@ -1,4 +1,6 @@ """ +https://en.wikipedia.org/wiki/Josephus_problem + There are people sitting in a circular fashion, print every third member while removing them, the next counter starts immediately after the member is removed. @@ -7,42 +9,32 @@ For example: Input: consider 123456789 members sitting in a circular fashion, Output: 369485271 -""" -a = ['1','2','3','4','5','6','7','8','9'] - -def josepheus(int_list, skip): - skip = skip - 1 #list starts with 0 index - idx = 0 - len_list = (len(int_list)) - while len_list>0: - idx = (skip+idx)%len_list #hashing to keep changing the index to every 3rd - print(int_list.pop(idx)) - len_list -= 1 +>>> a = ['1', '2', '3', '4', '5', '6', '7', '8', '9'] +>>> josepheus_generator = josepheus(a, 3) +>>> assert next(josepheus_generator) == '3' +>>> assert next(josepheus_generator) == '6' +>>> assert next(josepheus_generator) == '9' +>>> assert next(josepheus_generator) == '4' +>>> assert next(josepheus_generator) == '8' +>>> assert next(josepheus_generator) == '5' +>>> assert next(josepheus_generator) == '2' +>>> assert next(josepheus_generator) == '7' +>>> assert next(josepheus_generator) == '1' +""" -josepheus(a,3) -""" -the reason for hashing is that we have to find the index of the item which needs to be removed. -So for e.g. if you iterate with the initial list of folks with every 3rd item eliminated: - -INPUT -int_list = 123456789 -skip = 3 - -While Iteration: - -int_list = 123456789 -len(int_list) = 9 -skip = 2 # as int_list starts from 0 -idx = (0 + 2) % 9 #here previous index was 0 -so 3rd element which is 3 in this case eliminated -int_list = 12456789 -len(int_list) = 8 -idx = (2 + 2) % 8 #here previous index was 2 -so 3rd element starting from 4th person which is 6 would be deleted. -and so on -The reason why we have to do this way is I am not putting the people who escape at the back of list so ideally in 2 while iteration the list should have been -45678912 and then no hashing needed to be done, which means you can directly remove the third element -""" +def josepheus(int_list, skip): + skip = skip - 1 # list starts with 0 index + idx = 0 + len_list = (len(int_list)) + while len_list > 0: + idx = (skip+idx) % len_list # hash index to every 3rd + yield int_list.pop(idx) + len_list -= 1 + + +if __name__ == "__main__": + import doctest + doctest.testmod() diff --git a/array/flatten.py b/array/flatten.py index f5466a3b4..e4a58b28a 100644 --- a/array/flatten.py +++ b/array/flatten.py @@ -1,26 +1,36 @@ +from collections import Iterable +from types import GeneratorType + """ Implement Flatten Arrays. Given an array that may contain nested arrays, -give a single resultant array. - -function flatten(input){ -} - -Example: +produce a single resultant array. -Input: var input = [2, 1, [3, [4, 5], 6], 7, [8]]; -flatten(input); -Output: [2, 1, 3, 4, 5, 6, 7, 8] +>>> nested_list = [2, 1, [3, [4, 5], 6], 7, [8]] +>>> flattened = flatten(nested_list) +>>> assert next(flattened) == 2 +>>> assert next(flattened) == 1 +>>> assert next(flattened) == 3 +>>> assert next(flattened) == 4 +>>> assert next(flattened) == 5 +>>> assert next(flattened) == 6 +>>> assert next(flattened) == 7 +>>> assert next(flattened) == 8 """ -import collections -def flatten(inputArr, outputArr=None): - if not outputArr: - outputArr = [] - for ele in inputArr: - if isinstance(ele, collections.Iterable): - flatten(ele, outputArr) +def flatten(iterable: Iterable) -> GeneratorType: + """ + Takes as input multi dimensional iterable and + returns generator which produces one dimensional output. + """ + for element in iterable: + if isinstance(element, Iterable): + yield from flatten(element) else: - outputArr.append(ele) - return outputArr + yield element + + +if __name__ == "__main__": + import doctest + doctest.testmod() \ No newline at end of file diff --git a/array/longest_non_repeat.py b/array/longest_non_repeat.py index ed2178bdb..6ee1e76b3 100644 --- a/array/longest_non_repeat.py +++ b/array/longest_non_repeat.py @@ -1,17 +1,25 @@ -# Given a string, find the length of the longest substring -# without repeating characters. +""" +Given a string, find the length of the longest substring +without repeating characters. +Examples: +Given "abcabcbb", the answer is "abc", which the length is 3. +Given "bbbbb", the answer is "b", with the length of 1. +Given "pwwkew", the answer is "wke", with the length of 3. +Note that the answer must be a substring, +"pwke" is a subsequence and not a substring. -# Examples: +>>> assert longest_non_repeat("abcabcbb") == 3 +>>> assert longest_non_repeat("bbbbb") == 1 +>>> assert longest_non_repeat("pwwkew") == 3 -# Given "abcabcbb", the answer is "abc", which the length is 3. +""" -# Given "bbbbb", the answer is "b", with the length of 1. - -# Given "pwwkew", the answer is "wke", with the length of 3. -# Note that the answer must be a substring, -# "pwke" is a subsequence and not a substring. def longest_non_repeat(string): + """ + Finds the length of the longest substring + without repeating characters. + """ if string is None: return 0 temp = [] @@ -23,7 +31,13 @@ def longest_non_repeat(string): max_len = max(max_len, len(temp)) return max_len + def longest_non_repeat_two(string): + """ + Finds the length of the longest substring + without repeating characters. + Uses alternative algorithm. + """ if string is None: return 0 start, max_len = 0, 0 @@ -34,10 +48,9 @@ def longest_non_repeat_two(string): else: max_len = max(max_len, index - start + 1) used_char[char] = index - return max_len + return max_len + -if __name__ == '__main__': - a = "abcabcdefbb" - print(a) - print(longest_non_repeat(a)) - print(longest_non_repeat_two(a)) +if __name__ == "__main__": + import doctest + doctest.testmod() diff --git a/array/merge_intervals.py b/array/merge_intervals.py index ce227d06a..b862a9458 100644 --- a/array/merge_intervals.py +++ b/array/merge_intervals.py @@ -4,51 +4,86 @@ For example, Given [1,3],[2,6],[8,10],[15,18], return [1,6],[8,10],[15,18]. + +>>> intervals_data = [[1,3],[2,6],[8,10],[15,18]] +>>> intervals = [] +>>> for start, end in intervals_data: +... intervals.append(Interval(start, end)) +>>> +>>> assert repr(Interval.merge(intervals)) == \ + "[Interval [1, 6], Interval [8, 10], Interval [15, 18]]" +>>> # assert repr(Interval.merge_v2(intervals)) == \ + "[Interval [1, 6], Interval [8, 10], Interval [15, 18]]" """ -# Definition for an interval. -class Interval(object): - def __init__(self, s=0, e=0): - self.start = s - self.end = e -def merge(intervals): +class Interval: """ - :type intervals: List[Interval] - :rtype: List[Interval] + In mathematics, a (real) interval is a set of real + numbers with the property that any number that lies + between two numbers in the set is also included in the set. + https://en.wikipedia.org/wiki/Interval_(mathematics) """ - out = [] - for i in sorted(intervals, key=lambda i: i.start): - if out and i.start <= out[-1].end: - out[-1].end = max(out[-1].end, i.end) - else: - out += i, - return out - -def print_intervals(intervals): - res = [] - for i in intervals: - res.append('['+str(i.start)+','+str(i.end)+']') - print("".join(res)) - -def merge_intervals(l): - #sort - if l is None: - return None - l.sort(key=lambda i: i[0]) - out = [l.pop(0)] - for i in l: - if out[-1][-1] >= i[0]: - out[-1][-1] = max(out[-1][-1], i[-1]) - else: - out.append(i) - return out + + def __init__(self, start=0, end=0): + self.start = start + self.end = end + + def __repr__(self): + return f"Interval [{self.start}, {self.end}]" + + def __iter__(self): + return range(self.start, self.end) + + def __getitem__(self, index): + if index < 0: + return self.end + index + return self.start + index + + def __len__(self): + return self.end - self.start + + def __contains__(self, item): + if self.start >= item >= self.end: + return True + return False + + @staticmethod + def merge(intervals): + """ Merges two intervals into one. """ + out = [] + for i in sorted(intervals, key=lambda i: i.start): + if out and i.start <= out[-1].end: + out[-1].end = max(out[-1].end, i.end) + else: + out += i, + return out + + @staticmethod + def print_intervals(intervals): + """ + Prints out the intervals. + """ + res = [] + for i in intervals: + res.append(repr(i)) + print("".join(res)) + + # Intervals should support item assignment ? + # @staticmethod + # def merge_v2(intervals): + # if intervals is None: + # return None + # intervals.sort(key=lambda i: i.start) + # out = [intervals.pop(0)] + # for i in intervals: + # if out[-1][-1] >= i[0]: + # out[-1][-1] = max(out[-1][-1], i[-1]) + # else: + # out.append(i) + # return out + if __name__ == "__main__": - given = [[1,3],[2,6],[8,10],[15,18]] - intervals = [] - for l, r in given: - intervals.append(Interval(l,r)) - print_intervals(intervals) - print_intervals(merge(intervals)) - print(merge_intervals(given)) + import doctest + doctest.testmod() From 0a88403a379309fc83d5edc40510be73db6a4ebb Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Josip=20Haboi=C4=87?= Date: Tue, 27 Mar 2018 11:49:20 +0200 Subject: [PATCH 121/387] UPDATE refactor, fix flake8 errors, add unittest-s --- array/circular_counter.py | 34 ++++++++-------- array/flatten.py | 35 +++++++++-------- array/longest_non_repeat.py | 24 ++++++++---- array/merge_intervals.py | 78 ++++++++++++++++++++++--------------- 4 files changed, 98 insertions(+), 73 deletions(-) diff --git a/array/circular_counter.py b/array/circular_counter.py index f7d528a13..8d7f90657 100644 --- a/array/circular_counter.py +++ b/array/circular_counter.py @@ -1,6 +1,4 @@ """ -https://en.wikipedia.org/wiki/Josephus_problem - There are people sitting in a circular fashion, print every third member while removing them, the next counter starts immediately after the member is removed. @@ -9,19 +7,6 @@ For example: Input: consider 123456789 members sitting in a circular fashion, Output: 369485271 - - ->>> a = ['1', '2', '3', '4', '5', '6', '7', '8', '9'] ->>> josepheus_generator = josepheus(a, 3) ->>> assert next(josepheus_generator) == '3' ->>> assert next(josepheus_generator) == '6' ->>> assert next(josepheus_generator) == '9' ->>> assert next(josepheus_generator) == '4' ->>> assert next(josepheus_generator) == '8' ->>> assert next(josepheus_generator) == '5' ->>> assert next(josepheus_generator) == '2' ->>> assert next(josepheus_generator) == '7' ->>> assert next(josepheus_generator) == '1' """ @@ -36,5 +21,20 @@ def josepheus(int_list, skip): if __name__ == "__main__": - import doctest - doctest.testmod() + import unittest + + class TestJosepheus(unittest.TestCase): + def test_josepheues(self): + a = ['1', '2', '3', '4', '5', '6', '7', '8', '9'] + josepheus_generator = josepheus(a, 3) + self.assertEqual(next(josepheus_generator), '3') + self.assertEqual(next(josepheus_generator), '6') + self.assertEqual(next(josepheus_generator), '9') + self.assertEqual(next(josepheus_generator), '4') + self.assertEqual(next(josepheus_generator), '8') + self.assertEqual(next(josepheus_generator), '5') + self.assertEqual(next(josepheus_generator), '2') + self.assertEqual(next(josepheus_generator), '7') + self.assertEqual(next(josepheus_generator), '1') + + unittest.main() diff --git a/array/flatten.py b/array/flatten.py index e4a58b28a..7759dd2f2 100644 --- a/array/flatten.py +++ b/array/flatten.py @@ -1,25 +1,12 @@ -from collections import Iterable -from types import GeneratorType - """ Implement Flatten Arrays. Given an array that may contain nested arrays, produce a single resultant array. - ->>> nested_list = [2, 1, [3, [4, 5], 6], 7, [8]] ->>> flattened = flatten(nested_list) ->>> assert next(flattened) == 2 ->>> assert next(flattened) == 1 ->>> assert next(flattened) == 3 ->>> assert next(flattened) == 4 ->>> assert next(flattened) == 5 ->>> assert next(flattened) == 6 ->>> assert next(flattened) == 7 ->>> assert next(flattened) == 8 """ +from collections.abc import Iterable -def flatten(iterable: Iterable) -> GeneratorType: +def flatten(iterable): """ Takes as input multi dimensional iterable and returns generator which produces one dimensional output. @@ -32,5 +19,19 @@ def flatten(iterable: Iterable) -> GeneratorType: if __name__ == "__main__": - import doctest - doctest.testmod() \ No newline at end of file + import unittest + + class TestFlatten(unittest.TestCase): + def test_flatten(self): + nested_list = [2, 1, [3, [4, 5], 6], 7, [8]] + flattened = flatten(nested_list) + self.assertEqual(next(flattened), 2) + self.assertEqual(next(flattened), 1) + self.assertEqual(next(flattened), 3) + self.assertEqual(next(flattened), 4) + self.assertEqual(next(flattened), 5) + self.assertEqual(next(flattened), 6) + self.assertEqual(next(flattened), 7) + self.assertEqual(next(flattened), 8) + + unittest.main() diff --git a/array/longest_non_repeat.py b/array/longest_non_repeat.py index 6ee1e76b3..a5bace0ee 100644 --- a/array/longest_non_repeat.py +++ b/array/longest_non_repeat.py @@ -7,11 +7,6 @@ Given "pwwkew", the answer is "wke", with the length of 3. Note that the answer must be a substring, "pwke" is a subsequence and not a substring. - ->>> assert longest_non_repeat("abcabcbb") == 3 ->>> assert longest_non_repeat("bbbbb") == 1 ->>> assert longest_non_repeat("pwwkew") == 3 - """ @@ -52,5 +47,20 @@ def longest_non_repeat_two(string): if __name__ == "__main__": - import doctest - doctest.testmod() + import unittest + + class TestLongestNonRepeat(unittest.TestCase): + + def test_longest_non_repeat_1(self): + string = "abcabcbb" + self.assertEqual(longest_non_repeat(string), 3) + + def test_longest_non_repeat_2(self): + string = "bbbbb" + self.assertEqual(longest_non_repeat(string), 1) + + def test_longest_non_repeat_3(self): + string = "pwwkew" + self.assertEqual(longest_non_repeat(string), 3) + + unittest.main() diff --git a/array/merge_intervals.py b/array/merge_intervals.py index b862a9458..f1d6abbf8 100644 --- a/array/merge_intervals.py +++ b/array/merge_intervals.py @@ -1,19 +1,5 @@ """ Given a collection of intervals, merge all overlapping intervals. - -For example, -Given [1,3],[2,6],[8,10],[15,18], -return [1,6],[8,10],[15,18]. - ->>> intervals_data = [[1,3],[2,6],[8,10],[15,18]] ->>> intervals = [] ->>> for start, end in intervals_data: -... intervals.append(Interval(start, end)) ->>> ->>> assert repr(Interval.merge(intervals)) == \ - "[Interval [1, 6], Interval [8, 10], Interval [15, 18]]" ->>> # assert repr(Interval.merge_v2(intervals)) == \ - "[Interval [1, 6], Interval [8, 10], Interval [15, 18]]" """ @@ -22,7 +8,6 @@ class Interval: In mathematics, a (real) interval is a set of real numbers with the property that any number that lies between two numbers in the set is also included in the set. - https://en.wikipedia.org/wiki/Interval_(mathematics) """ def __init__(self, start=0, end=0): @@ -30,10 +15,10 @@ def __init__(self, start=0, end=0): self.end = end def __repr__(self): - return f"Interval [{self.start}, {self.end}]" + return f"Interval ({self.start}, {self.end})" def __iter__(self): - return range(self.start, self.end) + return iter(range(self.start, self.end)) def __getitem__(self, index): if index < 0: @@ -48,6 +33,15 @@ def __contains__(self, item): return True return False + def __eq__(self, other): + if self.start == other.start and self.end == other.end: + return True + return False + + def as_list(self): + """ Return interval as list. """ + return list(self) + @staticmethod def merge(intervals): """ Merges two intervals into one. """ @@ -69,21 +63,41 @@ def print_intervals(intervals): res.append(repr(i)) print("".join(res)) - # Intervals should support item assignment ? - # @staticmethod - # def merge_v2(intervals): - # if intervals is None: - # return None - # intervals.sort(key=lambda i: i.start) - # out = [intervals.pop(0)] - # for i in intervals: - # if out[-1][-1] >= i[0]: - # out[-1][-1] = max(out[-1][-1], i[-1]) - # else: - # out.append(i) - # return out + @staticmethod + def merge_v2(intervals): + """ Merges intervals in the form of list. """ + if intervals is None: + return None + intervals.sort(key=lambda i: i[0]) + out = [intervals.pop(0)] + for i in intervals: + if out[-1][-1] >= i[0]: + out[-1][-1] = max(out[-1][-1], i[-1]) + else: + out.append(i) + return out if __name__ == "__main__": - import doctest - doctest.testmod() + import unittest + + class TestMergeInterval(unittest.TestCase): + + def test_merge(self): + interval_list = [[1, 3], [2, 6], [8, 10], [15, 18]] + intervals = [Interval(i[0], i[1]) for i in interval_list] + merged_intervals = Interval.merge(intervals) + self.assertEqual( + merged_intervals, + [Interval(1, 6), Interval(8, 10), Interval(15, 18)] + ) + + def test_merge_v2(self): + interval_list = [[1, 3], [2, 6], [8, 10], [15, 18]] + merged_intervals = Interval.merge_v2(interval_list) + self.assertEqual( + merged_intervals, + [[1, 6], [8, 10], [15, 18]] + ) + + unittest.main() From 191577898a70ed830d195fa6dc3692d09f5a2532 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 27 Mar 2018 18:32:34 +0530 Subject: [PATCH 122/387] moved tests outside `name==main` block `merge_v2` moved outside `Interval` class. --- array/merge_intervals.py | 41 ++++++++++++++++++++-------------------- 1 file changed, 20 insertions(+), 21 deletions(-) diff --git a/array/merge_intervals.py b/array/merge_intervals.py index f1d6abbf8..9bc922331 100644 --- a/array/merge_intervals.py +++ b/array/merge_intervals.py @@ -77,27 +77,26 @@ def merge_v2(intervals): out.append(i) return out +import unittest + +class TestMergeInterval(unittest.TestCase): + + def test_merge(self): + interval_list = [[1, 3], [2, 6], [8, 10], [15, 18]] + intervals = [Interval(i[0], i[1]) for i in interval_list] + merged_intervals = Interval.merge(intervals) + self.assertEqual( + merged_intervals, + [Interval(1, 6), Interval(8, 10), Interval(15, 18)] + ) + + def test_merge_v2(self): + interval_list = [[1, 3], [2, 6], [8, 10], [15, 18]] + merged_intervals = Interval.merge_v2(interval_list) + self.assertEqual( + merged_intervals, + [[1, 6], [8, 10], [15, 18]] + ) if __name__ == "__main__": - import unittest - - class TestMergeInterval(unittest.TestCase): - - def test_merge(self): - interval_list = [[1, 3], [2, 6], [8, 10], [15, 18]] - intervals = [Interval(i[0], i[1]) for i in interval_list] - merged_intervals = Interval.merge(intervals) - self.assertEqual( - merged_intervals, - [Interval(1, 6), Interval(8, 10), Interval(15, 18)] - ) - - def test_merge_v2(self): - interval_list = [[1, 3], [2, 6], [8, 10], [15, 18]] - merged_intervals = Interval.merge_v2(interval_list) - self.assertEqual( - merged_intervals, - [[1, 6], [8, 10], [15, 18]] - ) - unittest.main() From 2a04d4227f1bcf74ca2fe85ace649d8b6238d900 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 27 Mar 2018 18:36:59 +0530 Subject: [PATCH 123/387] Update circular_counter.py added one more test for `StopIteration`. --- array/circular_counter.py | 33 +++++++++++++++++---------------- 1 file changed, 17 insertions(+), 16 deletions(-) diff --git a/array/circular_counter.py b/array/circular_counter.py index 8d7f90657..9d942dc81 100644 --- a/array/circular_counter.py +++ b/array/circular_counter.py @@ -19,22 +19,23 @@ def josepheus(int_list, skip): yield int_list.pop(idx) len_list -= 1 +import unittest -if __name__ == "__main__": - import unittest - - class TestJosepheus(unittest.TestCase): - def test_josepheues(self): - a = ['1', '2', '3', '4', '5', '6', '7', '8', '9'] - josepheus_generator = josepheus(a, 3) - self.assertEqual(next(josepheus_generator), '3') - self.assertEqual(next(josepheus_generator), '6') - self.assertEqual(next(josepheus_generator), '9') - self.assertEqual(next(josepheus_generator), '4') - self.assertEqual(next(josepheus_generator), '8') - self.assertEqual(next(josepheus_generator), '5') - self.assertEqual(next(josepheus_generator), '2') - self.assertEqual(next(josepheus_generator), '7') - self.assertEqual(next(josepheus_generator), '1') +class TestJosepheus(unittest.TestCase): + def test_josepheues(self): + a = ['1', '2', '3', '4', '5', '6', '7', '8', '9'] + josepheus_generator = josepheus(a, 3) + self.assertEqual(next(josepheus_generator), '3') + self.assertEqual(next(josepheus_generator), '6') + self.assertEqual(next(josepheus_generator), '9') + self.assertEqual(next(josepheus_generator), '4') + self.assertEqual(next(josepheus_generator), '8') + self.assertEqual(next(josepheus_generator), '5') + self.assertEqual(next(josepheus_generator), '2') + self.assertEqual(next(josepheus_generator), '7') + self.assertEqual(next(josepheus_generator), '1') + self.assertRaises(StopIteration, next, josepheus_generator) +if __name__ == "__main__": + unittest.main() From ce3932723c0c5a7ab147034f0285f21ac3313961 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 27 Mar 2018 18:48:34 +0530 Subject: [PATCH 124/387] Update flatten.py --- array/flatten.py | 50 ++++++++++++++++++++++++++++++++---------------- 1 file changed, 34 insertions(+), 16 deletions(-) diff --git a/array/flatten.py b/array/flatten.py index 7759dd2f2..8312a3db7 100644 --- a/array/flatten.py +++ b/array/flatten.py @@ -3,10 +3,21 @@ Given an array that may contain nested arrays, produce a single resultant array. """ -from collections.abc import Iterable +from collections import Iterable +# return list +def flatten(inputArr, outputArr=None): + if not outputArr: + outputArr = [] + for ele in inputArr: + if isinstance(ele, Iterable): + flatten(ele, outputArr) + else: + outputArr.append(ele) + return outputArr -def flatten(iterable): +# returns iterator +def flatten_v2(iterable): """ Takes as input multi dimensional iterable and returns generator which produces one dimensional output. @@ -17,21 +28,28 @@ def flatten(iterable): else: yield element +import unittest -if __name__ == "__main__": - import unittest +class TestFlatten(unittest.TestCase): + def test_flatten(self): + nested_list = [2, 1, [3, [4, 5], 6], 7, [8]] + flattened = flatten(nested_list) + self.assertEqual(flattened, [2, 1, 3, 4, 5, 6, 7, 8]) + + def test_flatten_v2(self): + nested_list = [2, 1, [3, [4, 5], 6], 7, [8]] + flattened = flatten_v2(nested_list) + self.assertEqual(next(flattened), 2) + self.assertEqual(next(flattened), 1) + self.assertEqual(next(flattened), 3) + self.assertEqual(next(flattened), 4) + self.assertEqual(next(flattened), 5) + self.assertEqual(next(flattened), 6) + self.assertEqual(next(flattened), 7) + self.assertEqual(next(flattened), 8) + self.assertRaises(StopIteration, next, flattened) - class TestFlatten(unittest.TestCase): - def test_flatten(self): - nested_list = [2, 1, [3, [4, 5], 6], 7, [8]] - flattened = flatten(nested_list) - self.assertEqual(next(flattened), 2) - self.assertEqual(next(flattened), 1) - self.assertEqual(next(flattened), 3) - self.assertEqual(next(flattened), 4) - self.assertEqual(next(flattened), 5) - self.assertEqual(next(flattened), 6) - self.assertEqual(next(flattened), 7) - self.assertEqual(next(flattened), 8) +if __name__ == "__main__": + unittest.main() From ececfc5af783803400241fa5d03c476e2aca7889 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 27 Mar 2018 18:53:49 +0530 Subject: [PATCH 125/387] Update longest_non_repeat.py --- array/longest_non_repeat.py | 34 ++++++++++++++++++++++------------ 1 file changed, 22 insertions(+), 12 deletions(-) diff --git a/array/longest_non_repeat.py b/array/longest_non_repeat.py index a5bace0ee..80bce12e5 100644 --- a/array/longest_non_repeat.py +++ b/array/longest_non_repeat.py @@ -45,22 +45,32 @@ def longest_non_repeat_two(string): used_char[char] = index return max_len +import unittest -if __name__ == "__main__": - import unittest +class TestLongestNonRepeat(unittest.TestCase): - class TestLongestNonRepeat(unittest.TestCase): + def test_longest_non_repeat(self): - def test_longest_non_repeat_1(self): - string = "abcabcbb" - self.assertEqual(longest_non_repeat(string), 3) + string = "abcabcbb" + self.assertEqual(longest_non_repeat(string), 3) - def test_longest_non_repeat_2(self): - string = "bbbbb" - self.assertEqual(longest_non_repeat(string), 1) + string = "bbbbb" + self.assertEqual(longest_non_repeat(string), 1) + + string = "pwwkew" + self.assertEqual(longest_non_repeat(string), 3) - def test_longest_non_repeat_3(self): - string = "pwwkew" - self.assertEqual(longest_non_repeat(string), 3) + def test_longest_non_repeat_two(self): + + string = "abcabcbb" + self.assertEqual(longest_non_repeat_two(string), 3) + string = "bbbbb" + self.assertEqual(longest_non_repeat_two(string), 1) + + string = "pwwkew" + self.assertEqual(longest_non_repeat_two(string), 3) + +if __name__ == "__main__": + unittest.main() From e4097fc77139abde6311886c2a7792d675e5f805 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 27 Mar 2018 18:56:25 +0530 Subject: [PATCH 126/387] Update merge_intervals.py --- array/merge_intervals.py | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) diff --git a/array/merge_intervals.py b/array/merge_intervals.py index 9bc922331..b39788b0b 100644 --- a/array/merge_intervals.py +++ b/array/merge_intervals.py @@ -63,19 +63,19 @@ def print_intervals(intervals): res.append(repr(i)) print("".join(res)) - @staticmethod - def merge_v2(intervals): - """ Merges intervals in the form of list. """ - if intervals is None: - return None - intervals.sort(key=lambda i: i[0]) - out = [intervals.pop(0)] - for i in intervals: - if out[-1][-1] >= i[0]: - out[-1][-1] = max(out[-1][-1], i[-1]) - else: - out.append(i) - return out + +def merge_v2(intervals): + """ Merges intervals in the form of list. """ + if intervals is None: + return None + intervals.sort(key=lambda i: i[0]) + out = [intervals.pop(0)] + for i in intervals: + if out[-1][-1] >= i[0]: + out[-1][-1] = max(out[-1][-1], i[-1]) + else: + out.append(i) + return out import unittest @@ -92,7 +92,7 @@ def test_merge(self): def test_merge_v2(self): interval_list = [[1, 3], [2, 6], [8, 10], [15, 18]] - merged_intervals = Interval.merge_v2(interval_list) + merged_intervals = merge_v2(interval_list) self.assertEqual( merged_intervals, [[1, 6], [8, 10], [15, 18]] From e48210cb66c0c8007b83625cf14824a75a6ecefb Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Tue, 27 Mar 2018 15:48:49 +0200 Subject: [PATCH 127/387] added some comments --- backtrack/anagram.py | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/backtrack/anagram.py b/backtrack/anagram.py index df3c9dc46..54caed9d4 100644 --- a/backtrack/anagram.py +++ b/backtrack/anagram.py @@ -1,4 +1,7 @@ def all_perms(elements): + """ + iterator: returns a perumation by each call. + """ if len(elements) <=1: yield elements else: @@ -7,6 +10,9 @@ def all_perms(elements): yield perm[:i] + elements[0:1] + perm[i:] def all_perms(elements): + """ + returns a list with the permuations. + """ if len(elements) <=1: return elements else: From 7f7e307976831e55b41cf7d32fdaf375bc6ae82a Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Tue, 27 Mar 2018 15:55:27 +0200 Subject: [PATCH 128/387] simplified line 44 --- backtrack/anagram.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/backtrack/anagram.py b/backtrack/anagram.py index 54caed9d4..d5aa5770f 100644 --- a/backtrack/anagram.py +++ b/backtrack/anagram.py @@ -41,7 +41,7 @@ def anagram(s1,s2): stillOK = True while j<26 and stillOK: if c1[j]==c2[j]: - j = j + 1 + j += 1 else: stillOK = False From c2f085228e5555fa67ebc1608c279ade93bbdbba Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Tue, 27 Mar 2018 15:57:10 +0200 Subject: [PATCH 129/387] improved the function anagram(...) --- backtrack/anagram.py | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/backtrack/anagram.py b/backtrack/anagram.py index d5aa5770f..a22735196 100644 --- a/backtrack/anagram.py +++ b/backtrack/anagram.py @@ -37,14 +37,7 @@ def anagram(s1,s2): pos = ord(s2[i])-ord('a') c2[pos] = c2[pos] + 1 - j = 0 - stillOK = True - while j<26 and stillOK: - if c1[j]==c2[j]: - j += 1 - else: - stillOK = False - - return stillOK + + return c1 == c2 print(anagram('apple','pleap')) From 4b2c85381cfd90191c0224ebb674dd2547a76aa1 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Tue, 27 Mar 2018 16:04:21 +0200 Subject: [PATCH 130/387] added a test suite and renamed one function --- backtrack/anagram.py | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/backtrack/anagram.py b/backtrack/anagram.py index a22735196..f5873095d 100644 --- a/backtrack/anagram.py +++ b/backtrack/anagram.py @@ -1,4 +1,6 @@ -def all_perms(elements): +import unittest + +def all_perms_iter(elements): """ iterator: returns a perumation by each call. """ @@ -21,9 +23,7 @@ def all_perms(elements): for i in range(len(elements)): tmp.append(perm[:i] + elements[0:1] + perm[i:]) return tmp - -word = "abc" -print(list(all_perms(word))) + def anagram(s1,s2): c1 = [0]*26 @@ -37,7 +37,19 @@ def anagram(s1,s2): pos = ord(s2[i])-ord('a') c2[pos] = c2[pos] + 1 - return c1 == c2 -print(anagram('apple','pleap')) + +class TestSuite (unittest.TestCase): + def test_all_perms(self): + allPerms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba'] + self.assertEqual(allPerms,all_perms("abc")) + def test_all_perms_iter(self): + it = all_perms_iter("abc") + allPerms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba'] + for i in range(len(allPerms)): + self.assertEqual(allPerms[i],next(it)) + + +if __name__ == "__main__": + unittest.main() From 1fd86d5458aa95aaa0bd24e5c2f84d93d59a3574 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Tue, 27 Mar 2018 16:07:39 +0200 Subject: [PATCH 131/387] added a test suite and renamed one function --- backtrack/anagram.py | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/backtrack/anagram.py b/backtrack/anagram.py index f5873095d..a917bc011 100644 --- a/backtrack/anagram.py +++ b/backtrack/anagram.py @@ -23,7 +23,7 @@ def all_perms(elements): for i in range(len(elements)): tmp.append(perm[:i] + elements[0:1] + perm[i:]) return tmp - + def anagram(s1,s2): c1 = [0]*26 @@ -49,6 +49,9 @@ def test_all_perms_iter(self): allPerms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba'] for i in range(len(allPerms)): self.assertEqual(allPerms[i],next(it)) + def test_angram(self): + self.assertTrue(anagram('apple','pleap')) + self.assertFalse(anagram("apple","cherry")) if __name__ == "__main__": From c1682b112434dbb5626b44f6a72a9b5d427b9158 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Tue, 27 Mar 2018 16:18:17 +0200 Subject: [PATCH 132/387] renamed recursiv call --- backtrack/anagram.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/backtrack/anagram.py b/backtrack/anagram.py index a917bc011..fe93cce5c 100644 --- a/backtrack/anagram.py +++ b/backtrack/anagram.py @@ -7,7 +7,7 @@ def all_perms_iter(elements): if len(elements) <=1: yield elements else: - for perm in all_perms(elements[1:]): + for perm in all_perms_iter(elements[1:]): for i in range(len(elements)): yield perm[:i] + elements[0:1] + perm[i:] From 383fbda0ae0e1d02c2e2f60105524be3b5e90fd4 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 27 Mar 2018 23:04:58 +0530 Subject: [PATCH 133/387] added abstract methods in Stacks and Queues --- queues/max_sliding_window.py | 69 ++++++++++++++++---------- queues/queue.py | 94 +++++++++++++++++++++++++----------- stack/stack.py | 81 +++++++++++++++++++------------ stack/valid_parenthesis.py | 8 ++- 4 files changed, 162 insertions(+), 90 deletions(-) diff --git a/queues/max_sliding_window.py b/queues/max_sliding_window.py index 977b640cf..33370823a 100644 --- a/queues/max_sliding_window.py +++ b/queues/max_sliding_window.py @@ -1,35 +1,52 @@ -import collections +""" +Keep indexes of good candidates in deque d. +The indexes in d are from the current window, they're increasing, +and their corresponding nums are decreasing. +Then the first deque element is the index of the largest window value. + +For each index i: + +1. Pop (from the end) indexes of smaller elements (they'll be useless). +2. Append the current index. +3. Pop (from the front) the index i - k, if it's still in the deque + (it falls out of the window). +4. If our window has reached size k, + append the current window maximum to the output. +""" +import collections +import unittest + + +def max_sliding_window(arr, k): + qi = collections.deque() # queue storing indexes of elements + result = [] + for i, n in enumerate(arr): + while qi and arr[qi[-1]] < n: + qi.pop() + qi.append(i) + if qi[0] == i - k: + qi.popleft() + if i >= k - 1: + result.append(arr[qi[0]]) + return result -# Keep indexes of good candidates in deque d. -# The indexes in d are from the current window, they're increasing, -# and their corresponding nums are decreasing. -# Then the first deque element is the index of the largest window value. -# For each index i: +class TestSuite(unittest.TestCase): -# 1. Pop (from the end) indexes of smaller elements (they'll be useless). -# 2. Append the current index. -# 3. Pop (from the front) the index i - k, if it's still in the deque -# (it falls out of the window). -# 4. If our window has reached size k, -# append the current window maximum to the output. + def test_max_sliding_window(self): + array = [1, 3, -1, -3, 5, 3, 6, 7] + self.assertEqual(max_sliding_window(array, k=5), [5, 5, 6, 7]) + self.assertEqual(max_sliding_window(array, k=3), [3, 3, 5, 5, 6, 7]) + self.assertEqual(max_sliding_window(array, k=7), [6, 7]) -def max_sliding_window(nums, k): - d = collections.deque() - out = [] - for i, n in enumerate(nums): - while d and nums[d[-1]] < n: - d.pop() - d += i, - if d[0] == i - k: - d.popleft() - if i >= k - 1: - out += nums[d[0]], - return out + array = [8, 5, 10, 7, 9, 4, 15, 12, 90, 13] + self.assertEqual(max_sliding_window(array, k=4), [10, 10, 10, 15, 15, 90, 90]) + self.assertEqual(max_sliding_window(array, k=7), [15, 15, 90, 90]) + self.assertEqual(max_sliding_window(array, k=2), [8, 10, 10, 9, 9, 15, 15, 90, 90]) -array = [1, 3, -1, -3, 5, 3, 6, 7] +if __name__ == '__main__': -print(max_sliding_window(array, 5)) + unittest.main() \ No newline at end of file diff --git a/queues/queue.py b/queues/queue.py index 975e73e39..618fd2343 100644 --- a/queues/queue.py +++ b/queues/queue.py @@ -13,34 +13,61 @@ * peek() returns the front element of the queue. """ import unittest +from abc import ABCMeta, abstractmethod -class AbstractQueue: +class AbstractQueue(metaclass=ABCMeta): + def __init__(self): self._size = 0 + def __len__(self): + return self._size + def is_empty(self): return self._size == 0 - def __len__(self): - return self._size + @abstractmethod + def enqueue(self, value): + pass + + @abstractmethod + def dequeue(self): + pass + + @abstractmethod + def peek(self): + pass + + @abstractmethod + def __iter__(self): + pass class ArrayQueue(AbstractQueue): + def __init__(self, capacity=10): """ Initialize python List with capacity of 10 or user given input. Python List type is a dynamic array, so we have to restrict its dynamic nature to make it work like a static array. """ - AbstractQueue.__init__(self) + super().__init__() self._array = [None] * capacity self._front = 0 self._rear = 0 + def __iter__(self): + probe = self._front + while True: + if probe == self._rear: + return + yield self._array[probe] + probe += 1 + def enqueue(self, value): if self._rear == len(self._array): - self.expand() + self._expand() self._array[self._rear] = value self._rear += 1 self._size += 1 @@ -54,39 +81,40 @@ def dequeue(self): self._size -= 1 return value - def expand(self): - """expands size of the array. - Time Complexity: O(n) - """ - self._array += [None] * len(self._array) - def peek(self): """returns the front element of queue.""" if self.is_empty(): raise IndexError("Queue is empty") return self._array[self._front] - def __iter__(self): - probe = self._front - while True: - if probe == self._rear: - raise StopIteration - yield self._array[probe] - probe += 1 + def _expand(self): + """expands size of the array. + Time Complexity: O(n) + """ + self._array += [None] * len(self._array) -class QueueNode(object): +class QueueNode: def __init__(self, value): self.value = value self.next = None class LinkedListQueue(AbstractQueue): + def __init__(self): - AbstractQueue.__init__(self) + super().__init__() self._front = None self._rear = None + def __iter__(self): + probe = self._front + while True: + if probe is None: + return + yield probe.value + probe = probe.next + def enqueue(self, value): node = QueueNode(value) if self._front is None: @@ -115,18 +143,25 @@ def peek(self): raise IndexError("Queue is empty") return self._front.value - def __iter__(self): - probe = self._front - while True: - if probe is None: - raise StopIteration - yield probe.value - probe = probe.next - # TODO class HeapPriorityQueue(AbstractQueue): - pass + + def __init__(self): + super().__init__() + pass + + def __iter__(self): + pass + + def enqueue(self, value): + pass + + def dequeue(self): + pass + + def peek(self): + pass class TestSuite(unittest.TestCase): @@ -194,4 +229,5 @@ def test_LinkedListQueue(self): if __name__ == "__main__": + unittest.main() diff --git a/stack/stack.py b/stack/stack.py index 9ce27f1c0..ce7213949 100644 --- a/stack/stack.py +++ b/stack/stack.py @@ -14,26 +14,39 @@ It needs no parameters and returns an integer. """ import unittest +from abc import ABCMeta, abstractmethod -class AbstractStack: +class AbstractStack(metaclass=ABCMeta): + """Abstract Class for Stacks.""" def __init__(self): self._top = -1 - def is_empty(self): - return self._top == -1 - def __len__(self): return self._top + 1 def __str__(self): - result = '------\n' - for element in self: - result += str(element) + '\n' - return result[:-1] + '\n------' + result = " ".join(map(str, self)) + return 'Top-> ' + result + + def is_empty(self): + return self._top == -1 + @abstractmethod def __iter__(self): - raise NotImplementedError + pass + + @abstractmethod + def push(self, value): + pass + + @abstractmethod + def pop(self): + pass + + @abstractmethod + def peek(self): + pass class ArrayStack(AbstractStack): @@ -46,10 +59,18 @@ def __init__(self, size=10): super().__init__() self._array = [None] * size + def __iter__(self): + probe = self._top + while True: + if probe == -1: + return + yield self._array[probe] + probe -= 1 + def push(self, value): self._top += 1 if self._top == len(self._array): - self.expand() + self._expand() self._array[self._top] = value def pop(self): @@ -65,23 +86,15 @@ def peek(self): raise IndexError("stack is empty") return self._array[self._top] - def expand(self): + def _expand(self): """ expands size of the array. Time Complexity: O(n) """ self._array += [None] * len(self._array) # double the size of the array - def __iter__(self): - probe = self._top - while True: - if probe == -1: - raise StopIteration - yield self._array[probe] - probe -= 1 - -class StackNode(object): +class StackNode: """Represents a single stack node.""" def __init__(self, value): self.value = value @@ -89,10 +102,19 @@ def __init__(self, value): class LinkedListStack(AbstractStack): + def __init__(self): super().__init__() self.head = None + def __iter__(self): + probe = self.head + while True: + if probe is None: + return + yield probe.value + probe = probe.next + def push(self, value): node = StackNode(value) node.next = self.head @@ -101,7 +123,7 @@ def push(self, value): def pop(self): if self.is_empty(): - raise IndexError("stack is empty") + raise IndexError("Stack is empty") value = self.head.value self.head = self.head.next self._top -= 1 @@ -109,17 +131,9 @@ def pop(self): def peek(self): if self.is_empty(): - raise IndexError("stack is empty") + raise IndexError("Stack is empty") return self.head.value - def __iter__(self): - probe = self.head - while True: - if probe is None: - raise StopIteration - yield probe.value - probe = probe.next - # optional """ def is_empty(self): @@ -148,6 +162,9 @@ def test_ArrayStack(self): # test __len__() self.assertEqual(3, len(stack)) + # test __str__() + self.assertEqual(str(stack), "Top-> 3 2 1") + # test is_empty() self.assertFalse(stack.is_empty()) @@ -163,6 +180,7 @@ def test_ArrayStack(self): def test_LinkedListStack(self): stack = LinkedListStack() + stack.push(1) stack.push(2) stack.push(3) @@ -177,6 +195,9 @@ def test_LinkedListStack(self): # test __len__() self.assertEqual(3, len(stack)) + # test __str__() + self.assertEqual(str(stack), "Top-> 3 2 1") + # test is_empty() self.assertFalse(stack.is_empty()) diff --git a/stack/valid_parenthesis.py b/stack/valid_parenthesis.py index 1101b9916..179c940a4 100644 --- a/stack/valid_parenthesis.py +++ b/stack/valid_parenthesis.py @@ -18,11 +18,8 @@ def is_valid(s: str) -> bool: for char in s: if char in dic.values(): stack.append(char) - elif char in dic.keys(): - if not stack: - return False - s = stack.pop() - if dic[char] != s: + elif char in dic: + if not stack or dic[char] != stack.pop(): return False return not stack @@ -32,6 +29,7 @@ class TestSuite(unittest.TestCase): test suite for the function (above) """ def test_is_valid(self): + self.assertTrue(is_valid("[]")) self.assertTrue(is_valid("[]()[]")) self.assertFalse(is_valid("[[[]]")) From 2a4bf81387f56151564f2738d9aede298ee4af4d Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 27 Mar 2018 23:14:20 +0530 Subject: [PATCH 134/387] minor update doc --- queues/max_sliding_window.py | 3 +++ 1 file changed, 3 insertions(+) diff --git a/queues/max_sliding_window.py b/queues/max_sliding_window.py index 33370823a..4c981fe45 100644 --- a/queues/max_sliding_window.py +++ b/queues/max_sliding_window.py @@ -1,4 +1,7 @@ """ +Given an array and a number k +Find the max elements of each of its sub-arrays of length k. + Keep indexes of good candidates in deque d. The indexes in d are from the current window, they're increasing, and their corresponding nums are decreasing. From 739f299751a7004f7875627122bc389dd6a7fd37 Mon Sep 17 00:00:00 2001 From: cclauss Date: Tue, 27 Mar 2018 19:59:14 +0200 Subject: [PATCH 135/387] Fix Python 3 related issues --- backtrack/array_sum_combinations.py | 38 +++++++++++++++++------------ bit/add_without_operator.py | 8 +++++- dp/combination_sum.py | 4 +-- dp/max_product_subarray.py | 15 +++++++----- graph/satisfiability.py | 3 ++- linkedlist/copy_random_pointer.py | 22 +++++++++-------- matrix/count_paths.py | 16 ++++++++---- strings/breaking_bad.py | 32 ++++++++++++++---------- strings/make_sentence.py | 10 ++++---- tree/pretty_print.py | 22 +++++++++-------- 10 files changed, 102 insertions(+), 68 deletions(-) diff --git a/backtrack/array_sum_combinations.py b/backtrack/array_sum_combinations.py index 71aaaccc6..6dbc10349 100644 --- a/backtrack/array_sum_combinations.py +++ b/backtrack/array_sum_combinations.py @@ -1,5 +1,6 @@ """ -WAP to take one element from each of the array add it to the target sum. Print all those three-element combinations. +WAP to take one element from each of the array add it to the target sum. +Print all those three-element combinations. /* A = [1, 2, 3, 3] @@ -9,21 +10,24 @@ */ Result: -[[1, 2, 4], [1, 3, 3], [1, 3, 3], [1, 3, 3], [1, 3, 3], [1, 4, 2], [2, 2, 3], [2, 2, 3], [2, 3, 2], [2, 3, 2], [3, 2, 2], [3, 2, 2]] +[[1, 2, 4], [1, 3, 3], [1, 3, 3], [1, 3, 3], [1, 3, 3], [1, 4, 2], + [2, 2, 3], [2, 2, 3], [2, 3, 2], [2, 3, 2], [3, 2, 2], [3, 2, 2]] """ - +import itertools +from functools import partial A = [1, 2, 3, 3] B = [2, 3, 3, 4] C = [1, 2, 2, 2] target = 7 + def construct_candidates(constructed_sofar): - global A,B,C + global A, B, C array = A - if 1 == len(constructed_sofar) : + if 1 == len(constructed_sofar): array = B - elif 2 == len(constructed_sofar) : + elif 2 == len(constructed_sofar): array = C return array @@ -34,53 +38,57 @@ def over(constructed_sofar): to_stop, reached_target = False, False for elem in constructed_sofar: sum += elem - if sum >= target or len(constructed_sofar) >= 3 : + if sum >= target or len(constructed_sofar) >= 3: to_stop = True if sum == target and 3 == len(constructed_sofar): reached_target = True return to_stop, reached_target + def backtrack(constructed_sofar): to_stop, reached_target = over(constructed_sofar) if to_stop: - if reached_target : - print constructed_sofar + if reached_target: + print(constructed_sofar) return candidates = construct_candidates(constructed_sofar) - for candidate in candidates : + for candidate in candidates: constructed_sofar.append(candidate) backtrack(constructed_sofar[:]) constructed_sofar.pop() + + backtrack([]) # Complexity: O(n(m+p)) # 1. Sort all the arrays - a,b,c. - This will improve average time complexity. -# 2. If c[i] < Sum, then look for Sum - c[i] in array a and b. When pair found, insert c[i], a[j] & b[k] into the result list. This can be done in O(n). +# 2. If c[i] < Sum, then look for Sum - c[i] in array a and b. When pair found, +# insert c[i], a[j] & b[k] into the result list. This can be done in O(n). # 3. Keep on doing the above procedure while going through complete c array. -import itertools -from functools import partial A = [1, 2, 3, 3] B = [2, 3, 3, 4] C = [1, 2, 2, 2] S = 7 + def check_sum(N, *nums): if sum(x for x in nums) == N: return (True, nums) else: return (False, nums) -pro = itertools.product(A,B,C) + +pro = itertools.product(A, B, C) func = partial(check_sum, S) sums = list(itertools.starmap(func, pro)) res = set() for s in sums: - if s[0] == True and s[1] not in res: + if s[0] is True and s[1] not in res: res.add(s[1]) print(res) diff --git a/bit/add_without_operator.py b/bit/add_without_operator.py index a87b0f0d8..a3c17440d 100644 --- a/bit/add_without_operator.py +++ b/bit/add_without_operator.py @@ -6,18 +6,24 @@ Output: 5 """ +try: + raw_input # Python 2 +except NameError: + raw_input = input # Python 3 + def addWithoutOperator(x, y): while y != 0: carry = x & y x = x ^ y y = carry << 1 - print x + print(x) def main(): x, y = map(int, raw_input().split()) addWithoutOperator(x, y) + if __name__ == '__main__': main() diff --git a/dp/combination_sum.py b/dp/combination_sum.py index 469b02885..67bc6aff7 100644 --- a/dp/combination_sum.py +++ b/dp/combination_sum.py @@ -61,6 +61,6 @@ def combination_sum_bottom_up(nums, target): combination_sum_topdown([1, 2, 3], 4) -print dp[4] +print(dp[4]) -print combination_sum_bottom_up([1, 2, 3], 4) +print(combination_sum_bottom_up([1, 2, 3], 4)) diff --git a/dp/max_product_subarray.py b/dp/max_product_subarray.py index 69b0dacf3..592e98fb1 100644 --- a/dp/max_product_subarray.py +++ b/dp/max_product_subarray.py @@ -5,6 +5,7 @@ For example, given the array [2,3,-2,4], the contiguous subarray [2,3] has the largest product = 6. """ +from functools import reduce def max_product(nums): @@ -35,6 +36,7 @@ def max_product(nums): #=> max_product_so_far: 1, [1] ''' + def subarray_with_max_product(arr): ''' arr is list of positive/negative numbers ''' l = len(arr) @@ -45,7 +47,8 @@ def subarray_with_max_product(arr): for i in range(l): max_product_end *= arr[i] - if arr[i] > 0: all_negative_flag = False + if arr[i] > 0: + all_negative_flag = False if max_product_end <= 0: max_product_end = arr[i] @@ -55,10 +58,10 @@ def subarray_with_max_product(arr): product_so_far = max_product_end so_far_end_i = i so_far_start_i = max_start_i - + if all_negative_flag: - print "max_product_so_far: %s, %s" % \ - (reduce(lambda x, y: x * y, arr), arr) + print("max_product_so_far: %s, %s" % + (reduce(lambda x, y: x * y, arr), arr)) else: - print "max_product_so_far: %s, %s" % (product_so_far,\ - arr[so_far_start_i:so_far_end_i + 1]) + print("max_product_so_far: %s, %s" % + (product_so_far, arr[so_far_start_i:so_far_end_i + 1])) diff --git a/graph/satisfiability.py b/graph/satisfiability.py index ad166c964..bc1d1892e 100644 --- a/graph/satisfiability.py +++ b/graph/satisfiability.py @@ -118,8 +118,9 @@ def solve_sat(formula): return value + if __name__ == '__main__': result = solve_sat(formula) for (variable, assign) in result.iteritems(): - print variable, ":", assign + print("{}:{}".format(variable, assign)) diff --git a/linkedlist/copy_random_pointer.py b/linkedlist/copy_random_pointer.py index 7e2718bf5..663eabb96 100644 --- a/linkedlist/copy_random_pointer.py +++ b/linkedlist/copy_random_pointer.py @@ -4,11 +4,13 @@ Return a deep copy of the list. """ +from collections import defaultdict -class Solution: -# @param head, a RandomListNode -# @return a RandomListNode -def copyRandomList(self, head): + +class Solution0: + # @param head, a RandomListNode + # @return a RandomListNode + def copyRandomList(self, head): dic = dict() m = n = head while m: @@ -20,12 +22,12 @@ def copyRandomList(self, head): n = n.next return dic.get(head) -#O(n) -class Solution: -# @param head, a RandomListNode -# @return a RandomListNode -def copyRandomList(self, head): - copy = collections.defaultdict(lambda: RandomListNode(0)) + +class Solution1: # O(n) + # @param head, a RandomListNode + # @return a RandomListNode + def copyRandomList(self, head): + copy = defaultdict(lambda: RandomListNode(0)) copy[None] = None node = head while node: diff --git a/matrix/count_paths.py b/matrix/count_paths.py index f1241e779..bfc2dcff7 100644 --- a/matrix/count_paths.py +++ b/matrix/count_paths.py @@ -1,5 +1,3 @@ - - # # Count the number of unique paths from a[0][0] to a[m-1][n-1] # We are allowed to move either right or down from a cell in the matrix. @@ -10,6 +8,13 @@ # matrix. Return count[m-1][n-1] # T(n)- O(mn), S(n)- O(mn) # + +try: + raw_input # Python 2 +except NameError: + raw_input = input # Python 3 + + def count_paths(m, n): if m < 1 or n < 1: return -1 @@ -25,14 +30,15 @@ def count_paths(m, n): for j in range(1, n): # Number of ways to reach a[i][j] = number of ways to reach # a[i-1][j] + a[i][j-1] - count[i][j] = count[i-1][j] + count[i][j-1] + count[i][j] = count[i - 1][j] + count[i][j - 1] - print count[m-1][n-1] + print(count[m - 1][n - 1]) def main(): m, n = map(int, raw_input().split()) count_paths(m, n) + if __name__ == '__main__': - main() \ No newline at end of file + main() diff --git a/strings/breaking_bad.py b/strings/breaking_bad.py index 1197e045c..c2b20fc97 100644 --- a/strings/breaking_bad.py +++ b/strings/breaking_bad.py @@ -22,34 +22,35 @@ ['[Am]azon', 'Mi[cro]soft', 'Goog[le]', 'Amaz[o]n', 'Micr[o]s[o]ft', 'G[o][o]gle'] """ +from functools import reduce + words = ['Amazon', 'Microsoft', 'Google'] symbols = ['i', 'Am', 'cro', 'le', 'abc'] + def match_symbol(words, symbols): import re combined = [] - for s in symbols: for c in words: r = re.search(s, c) if r: combined.append(re.sub(s, "[{}]".format(s), c)) - return combined -print(match_symbol(words, symbols)) - +print(match_symbol(words, symbols)) """ O(n * max(log(n), l)) time complexity n = len(words), l = len of a word """ + def match_symbol_1(words, symbols): res = [] # reversely sort the symbols according to their lengths. - symbols = sorted(symbols, key = lambda _: len(_), reverse = True) + symbols = sorted(symbols, key=lambda _: len(_), reverse=True) for word in words: for symbol in symbols: word_replaced = '' @@ -63,6 +64,7 @@ def match_symbol_1(words, symbols): res.append(word) return res + words = ['Amazon', 'Microsoft', 'Google', 'Facebook'] symbols = ['i', 'Am', 'cro', 'Na', 'le', 'abc'] print(match_symbol_1(words, symbols)) @@ -70,19 +72,19 @@ def match_symbol_1(words, symbols): """ -Another approach is to use a Trie for the dictionary (the symbols), and then match -brute force. The complexity will depend on the dictionary; +Another approach is to use a Trie for the dictionary (the symbols), and then +match brute force. The complexity will depend on the dictionary; if all are suffixes of the other, it will be n*m (where m is the size of the dictionary). For example, in Python: """ -from functools import reduce class TrieNode: def __init__(self): self.c = dict() self.sym = None + def bracket(words, symbols): root = TrieNode() for s in symbols: @@ -101,13 +103,17 @@ def bracket(words, symbols): while j < len(word) and word[j] in t.c: t = t.c[word[j]] if t.sym is not None: - symlist.append((j+1-len(t.sym), j+1, t.sym)) + symlist.append((j + 1 - len(t.sym), j + 1, t.sym)) j += 1 i += 1 if len(symlist) > 0: - sym = reduce(lambda x, y: x if x[1]-x[0] >= y[1]-y[0] else y, symlist) - result[word] = "{}[{}]{}".format(word[:sym[0]], sym[2], word[sym[1]:]) + sym = reduce(lambda x, y: x if x[1] - x[0] >= y[1] - y[0] else y, + symlist) + result[word] = "{}[{}]{}".format(word[:sym[0]], sym[2], + word[sym[1]:]) return tuple(word if word not in result else result[word] for word in words) -bracket(['amazon', 'microsoft', 'google'], ['i', 'am', 'cro', 'na', 'le', 'abc']) ->>> ('[am]azon', 'mi[cro]soft', 'goog[le]') + +bracket(['amazon', 'microsoft', 'google'], + ['i', 'am', 'cro', 'na', 'le', 'abc']) +# >>> ('[am]azon', 'mi[cro]soft', 'goog[le]') diff --git a/strings/make_sentence.py b/strings/make_sentence.py index 0cc2263c3..d9d628fd0 100644 --- a/strings/make_sentence.py +++ b/strings/make_sentence.py @@ -14,16 +14,16 @@ count = 0 + def make_sentence(str_piece, dictionarys): global count if len(str_piece) == 0: return True for i in range(0, len(str_piece)): prefix, suffix = str_piece[0:i], str_piece[i:] - if ((prefix in dictionarys and suffix in dictionarys) - or (prefix in dictionarys - and make_sentence(suffix, dictionarys))): - count += 1 + if prefix in dictionarys: + if suffix in dictionarys or make_sentence(suffix, dictionarys): + count += 1 return True @@ -31,4 +31,4 @@ def make_sentence(str_piece, dictionarys): dictionarys = ["", "app", "let", "t", "apple", "applet"] word = "applet" make_sentence(word, dictionarys) - print count \ No newline at end of file + print(count) diff --git a/tree/pretty_print.py b/tree/pretty_print.py index dc58ab3ec..d50f26f34 100644 --- a/tree/pretty_print.py +++ b/tree/pretty_print.py @@ -1,20 +1,22 @@ # a -> Adam -> Book -> 4 # b -> Bill -> Computer -> 5 - # -> TV -> 6 - # Jill -> Sports -> 1 +# -> TV -> 6 +# Jill -> Sports -> 1 # c -> Bill -> Sports -> 3 # d -> Adam -> Computer -> 3 - # Quin -> Computer -> 3 +# Quin -> Computer -> 3 # e -> Quin -> Book -> 5 - # -> TV -> 2 +# -> TV -> 2 # f -> Adam -> Computer -> 7 +from __future__ import print_function + def treePrint(tree): for key in tree: - print key, # comma prevents a newline character - treeElem = tree[key] # multiple lookups is expensive, even amortized O(1)! + print(key, end=' ') # end=' ' prevents a newline character + treeElem = tree[key] # multiple lookups is expensive, even amortized O(1)! for subElem in treeElem: - print " -> ", subElem, - if type(subElem) != str: # OP wants indenting after digits - print "\n " # newline and a space to match indenting - print "" # forces a newline + print(" -> ", subElem, end=' ') + if type(subElem) != str: # OP wants indenting after digits + print("\n ") # newline and a space to match indenting + print() # forces a newline From 4a25bb28dd50bcdcfa3c09e1fa9a07d645581dae Mon Sep 17 00:00:00 2001 From: cclauss Date: Tue, 27 Mar 2018 21:47:13 +0200 Subject: [PATCH 136/387] Add Travis CI to do automated testing [Flake8](http://flake8.pycqa.org) tests can help to find Python syntax errors, undefined names, and other code quality issues. [Travis CI](https://travis-ci.org) is a framework for running flake8 and other tests which is free for open source projects like this one. The owner of the this repo would need to go to https://travis-ci.org/profile and flip the repository switch __on__ to enable free automated flake8 testing of each pull request. --- .travis.yml | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 .travis.yml diff --git a/.travis.yml b/.travis.yml new file mode 100644 index 000000000..94bc7440d --- /dev/null +++ b/.travis.yml @@ -0,0 +1,24 @@ +group: travis_latest +language: python +cache: pip +python: + - 3.6 + #- nightly + #- pypy3 +matrix: + allow_failures: + - python: nightly + - python: pypy3 +install: + #- pip install -r requirements.txt + - pip install flake8 # pytest # add another testing frameworks later +before_script: + # stop the build if there are Python syntax errors or undefined names + - flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics + # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide + - flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics +script: + - true # pytest --capture=sys # add other tests here +notifications: + on_success: change + on_failure: change # `always` will be the setting once code changes slow down From d8a0e206431b10e918fbb095f185ee23f3bcda41 Mon Sep 17 00:00:00 2001 From: cclauss Date: Tue, 27 Mar 2018 21:50:47 +0200 Subject: [PATCH 137/387] Clarify Python 3 in README.md --- README.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 01835243c..29c144fa3 100644 --- a/README.md +++ b/README.md @@ -5,7 +5,7 @@ English | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/R Pythonic Data Structures and Algorithms ========================================= -Minimal and clean example implementations of data structures and algorithms in Python. +Minimal and clean example implementations of data structures and algorithms in Python 3. ## Contributing Thanks for your interest in contributing! There are many ways to contribute to this project. [Get started here](CONTRIBUTING.md) @@ -238,4 +238,4 @@ The repo is maintained by [Ankit Agarwal](https://github.com/ankit167) And thanks to [all the contributors](https://github.com/keon/algorithms/graphs/contributors) -who helped in building the repo. \ No newline at end of file +who helped in building the repo. From d2233f60337d8b02574f9896c38c0bdf6217d311 Mon Sep 17 00:00:00 2001 From: Keon Date: Tue, 27 Mar 2018 19:45:05 -0400 Subject: [PATCH 138/387] add Christian as a maintainer @christianbender :) --- README.md | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 29c144fa3..86cb3672c 100644 --- a/README.md +++ b/README.md @@ -234,7 +234,8 @@ Thanks for your interest in contributing! There are many ways to contribute to t ## Contributors The repo is maintained by [Keon Kim](https://github.com/keon) -[Rahul Goswami](https://github.com/goswami-rahul) +[Rahul Goswami](https://github.com/goswami-rahul) +[Christian Bender](https://github.com/christianbender) [Ankit Agarwal](https://github.com/ankit167) And thanks to [all the contributors](https://github.com/keon/algorithms/graphs/contributors) From 4a5aa070df3cf45ce9bbc14e0c6478faeeb59d46 Mon Sep 17 00:00:00 2001 From: Keon Date: Tue, 27 Mar 2018 19:46:20 -0400 Subject: [PATCH 139/387] Update README.md --- README.md | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/README.md b/README.md index 86cb3672c..983c523b6 100644 --- a/README.md +++ b/README.md @@ -233,10 +233,11 @@ Thanks for your interest in contributing! There are many ways to contribute to t ## Contributors The repo is maintained by -[Keon Kim](https://github.com/keon) -[Rahul Goswami](https://github.com/goswami-rahul) -[Christian Bender](https://github.com/christianbender) -[Ankit Agarwal](https://github.com/ankit167) + +* [Keon Kim](https://github.com/keon) +* [Rahul Goswami](https://github.com/goswami-rahul) +* [Christian Bender](https://github.com/christianbender) +* [Ankit Agarwal](https://github.com/ankit167) And thanks to [all the contributors](https://github.com/keon/algorithms/graphs/contributors) who helped in building the repo. From dc0301388f528cdda0aa7f2b57f8fa32261c2e38 Mon Sep 17 00:00:00 2001 From: Saad Date: Tue, 27 Mar 2018 20:19:31 -0500 Subject: [PATCH 140/387] Create move_Zeros_to_end --- array/move_zeros_to_end | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 array/move_zeros_to_end diff --git a/array/move_zeros_to_end b/array/move_zeros_to_end new file mode 100644 index 000000000..3a599a3ba --- /dev/null +++ b/array/move_zeros_to_end @@ -0,0 +1,24 @@ +""" +Write an algorithm that takes an array and moves all of the zeros to the end, preserving the order of the other elements. +move_zeros([false,1,0,1,2,0,1,3,"a"]) # returns[false,1,1,2,1,3,"a",0,0] + +The time complexity of the below algorithm is O(n). +""" + +def move_zeros(array): + if len(array) < 1: + return array + else: + list = [] + zeros = 0 + + for i in array: + if not i and type(i) is int or type(i) is float: + zeros += 1 + else: + list.append(i) + + for i in range(0, zeros): + list.append(0) + + return list From 306b2060f823efbbf99c55e3e544192f7f01dd3b Mon Sep 17 00:00:00 2001 From: Saad Date: Tue, 27 Mar 2018 20:20:59 -0500 Subject: [PATCH 141/387] Update README.md --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index 983c523b6..ee991e7b3 100644 --- a/README.md +++ b/README.md @@ -25,6 +25,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [summary_ranges](array/summary_ranges.py) - [three_sum](array/three_sum.py) - [two_sum](array/two_sum.py) + - [move_zeros_to_end] (array/move_zeros_to_end.py) - [backtrack](backtrack) - [general_solution.md](backtrack/) - [anagram](backtrack/anagram.py) From a0e9a9757081f78d4fbe1eafe0b553bc7075bf0e Mon Sep 17 00:00:00 2001 From: Saad Date: Tue, 27 Mar 2018 20:24:34 -0500 Subject: [PATCH 142/387] Rename move_zeros_to_end to move_zeros_to_end.py --- array/{move_zeros_to_end => move_zeros_to_end.py} | 0 1 file changed, 0 insertions(+), 0 deletions(-) rename array/{move_zeros_to_end => move_zeros_to_end.py} (100%) diff --git a/array/move_zeros_to_end b/array/move_zeros_to_end.py similarity index 100% rename from array/move_zeros_to_end rename to array/move_zeros_to_end.py From 9ae0cd03f23a7ecf9e0498854f045068d9e84ffa Mon Sep 17 00:00:00 2001 From: Saad Date: Tue, 27 Mar 2018 20:27:13 -0500 Subject: [PATCH 143/387] Update README.md --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index ee991e7b3..d56f727a2 100644 --- a/README.md +++ b/README.md @@ -25,7 +25,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [summary_ranges](array/summary_ranges.py) - [three_sum](array/three_sum.py) - [two_sum](array/two_sum.py) - - [move_zeros_to_end] (array/move_zeros_to_end.py) + - [move_zeros_to_end](array/move_zeros_to_end.py) - [backtrack](backtrack) - [general_solution.md](backtrack/) - [anagram](backtrack/anagram.py) From 7003f05c61fd94d04ec2f43c6369f61f936ef67e Mon Sep 17 00:00:00 2001 From: cclauss Date: Wed, 28 Mar 2018 08:02:35 +0200 Subject: [PATCH 144/387] Fix Python 3 related issues --- bit/add_without_operator.py | 7 +------ matrix/count_paths.py | 7 +------ 2 files changed, 2 insertions(+), 12 deletions(-) diff --git a/bit/add_without_operator.py b/bit/add_without_operator.py index a3c17440d..1ec1490d9 100644 --- a/bit/add_without_operator.py +++ b/bit/add_without_operator.py @@ -6,11 +6,6 @@ Output: 5 """ -try: - raw_input # Python 2 -except NameError: - raw_input = input # Python 3 - def addWithoutOperator(x, y): while y != 0: @@ -21,7 +16,7 @@ def addWithoutOperator(x, y): def main(): - x, y = map(int, raw_input().split()) + x, y = map(int, input('Enter two positive integers: ').split()) addWithoutOperator(x, y) diff --git a/matrix/count_paths.py b/matrix/count_paths.py index bfc2dcff7..7f57c9ef4 100644 --- a/matrix/count_paths.py +++ b/matrix/count_paths.py @@ -9,11 +9,6 @@ # T(n)- O(mn), S(n)- O(mn) # -try: - raw_input # Python 2 -except NameError: - raw_input = input # Python 3 - def count_paths(m, n): if m < 1 or n < 1: @@ -36,7 +31,7 @@ def count_paths(m, n): def main(): - m, n = map(int, raw_input().split()) + m, n = map(int, input('Enter two positive integers: ').split()) count_paths(m, n) From 48660664f952555aefa3122eaa26234ad63398f3 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Wed, 28 Mar 2018 15:34:49 +0200 Subject: [PATCH 145/387] made required changes --- backtrack/anagram.py | 19 +++++++------------ 1 file changed, 7 insertions(+), 12 deletions(-) diff --git a/backtrack/anagram.py b/backtrack/anagram.py index fe93cce5c..84cdb7ac3 100644 --- a/backtrack/anagram.py +++ b/backtrack/anagram.py @@ -24,34 +24,29 @@ def all_perms(elements): tmp.append(perm[:i] + elements[0:1] + perm[i:]) return tmp - def anagram(s1,s2): c1 = [0]*26 c2 = [0]*26 - for i in range(len(s1)): pos = ord(s1[i])-ord('a') c1[pos] = c1[pos] + 1 - for i in range(len(s2)): pos = ord(s2[i])-ord('a') c2[pos] = c2[pos] + 1 - return c1 == c2 - class TestSuite (unittest.TestCase): def test_all_perms(self): - allPerms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba'] - self.assertEqual(allPerms,all_perms("abc")) + perms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba'] + self.assertEqual(perms, all_perms("abc")) def test_all_perms_iter(self): it = all_perms_iter("abc") - allPerms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba'] - for i in range(len(allPerms)): - self.assertEqual(allPerms[i],next(it)) + perms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba'] + for i in range(len(perms)): + self.assertEqual(perms[i], next(it)) def test_angram(self): - self.assertTrue(anagram('apple','pleap')) - self.assertFalse(anagram("apple","cherry")) + self.assertTrue(anagram('apple', 'pleap')) + self.assertFalse(anagram("apple", "cherry")) if __name__ == "__main__": From 3b30dcc70cca6430594bdb3e35299252866b8577 Mon Sep 17 00:00:00 2001 From: Saad Date: Wed, 28 Mar 2018 08:50:46 -0500 Subject: [PATCH 146/387] Change the variable name for clarity --- array/move_zeros_to_end.py | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-) diff --git a/array/move_zeros_to_end.py b/array/move_zeros_to_end.py index 3a599a3ba..5e2655320 100644 --- a/array/move_zeros_to_end.py +++ b/array/move_zeros_to_end.py @@ -6,19 +6,16 @@ """ def move_zeros(array): - if len(array) < 1: - return array - else: - list = [] - zeros = 0 + result = [] + zeros = 0 - for i in array: - if not i and type(i) is int or type(i) is float: - zeros += 1 - else: - list.append(i) + for i in array: + if not i and type(i) is int or type(i) is float: + zeros += 1 + else: + result.append(i) - for i in range(0, zeros): - list.append(0) +for i in range(0, zeros): + result.append(0) - return list +return result From 4a85c9a7e60e5a3f1a426fee432dfb020387d63e Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Wed, 28 Mar 2018 21:45:21 +0530 Subject: [PATCH 147/387] bug fix #173 --- array/flatten.py | 31 +++++++++++++++++++++++++++---- 1 file changed, 27 insertions(+), 4 deletions(-) diff --git a/array/flatten.py b/array/flatten.py index 8312a3db7..56c3bb607 100644 --- a/array/flatten.py +++ b/array/flatten.py @@ -7,7 +7,7 @@ # return list def flatten(inputArr, outputArr=None): - if not outputArr: + if outputArr is None: outputArr = [] for ele in inputArr: if isinstance(ele, Iterable): @@ -17,7 +17,7 @@ def flatten(inputArr, outputArr=None): return outputArr # returns iterator -def flatten_v2(iterable): +def flatten_iter(iterable): """ Takes as input multi dimensional iterable and returns generator which produces one dimensional output. @@ -36,9 +36,17 @@ def test_flatten(self): flattened = flatten(nested_list) self.assertEqual(flattened, [2, 1, 3, 4, 5, 6, 7, 8]) - def test_flatten_v2(self): + nested_list = [[3, [4, 5], 6], 7, [8]] + flattened = flatten(nested_list) + self.assertEqual(flattened, [3, 4, 5, 6, 7, 8]) + + nested_list = [[], [8]] + flattened = flatten(nested_list) + self.assertEqual(flattened, [8]) + + def test_flatten_iter(self): nested_list = [2, 1, [3, [4, 5], 6], 7, [8]] - flattened = flatten_v2(nested_list) + flattened = flatten_iter(nested_list) self.assertEqual(next(flattened), 2) self.assertEqual(next(flattened), 1) self.assertEqual(next(flattened), 3) @@ -48,6 +56,21 @@ def test_flatten_v2(self): self.assertEqual(next(flattened), 7) self.assertEqual(next(flattened), 8) self.assertRaises(StopIteration, next, flattened) + + nested_list = [[3, [4, 5], 6], 7, [8]] + flattened = flatten_iter(nested_list) + self.assertEqual(next(flattened), 3) + self.assertEqual(next(flattened), 4) + self.assertEqual(next(flattened), 5) + self.assertEqual(next(flattened), 6) + self.assertEqual(next(flattened), 7) + self.assertEqual(next(flattened), 8) + self.assertRaises(StopIteration, next, flattened) + + nested_list = [[], [8]] + flattened = flatten_iter(nested_list) + self.assertEqual(next(flattened), 8) + self.assertRaises(StopIteration, next, flattened) if __name__ == "__main__": From c50beace87549827c0da4bbd05488159716a21f7 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Wed, 28 Mar 2018 22:02:42 +0530 Subject: [PATCH 148/387] minor update in if statement and used list.extend() --- array/move_zeros_to_end.py | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/array/move_zeros_to_end.py b/array/move_zeros_to_end.py index 5e2655320..d64e55a9a 100644 --- a/array/move_zeros_to_end.py +++ b/array/move_zeros_to_end.py @@ -10,12 +10,10 @@ def move_zeros(array): zeros = 0 for i in array: - if not i and type(i) is int or type(i) is float: + if i is 0 or i is 0.0: # not using `not i` to avoid `False`, `[]`, etc. zeros += 1 else: result.append(i) - -for i in range(0, zeros): - result.append(0) - -return result + + result.extend([0] * zeros) + return result From 3f34be3121be8fc7dd9225796a2efb01414539cf Mon Sep 17 00:00:00 2001 From: Saad Date: Wed, 28 Mar 2018 21:23:15 -0500 Subject: [PATCH 149/387] Create Summing_digits.py --- maths/Summing_digits.py | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 maths/Summing_digits.py diff --git a/maths/Summing_digits.py b/maths/Summing_digits.py new file mode 100644 index 000000000..8914a8dfd --- /dev/null +++ b/maths/Summing_digits.py @@ -0,0 +1,33 @@ +""" +Recently, I encountered an interview question whose description was as below: + +The number 89 is the first integer with more than one digit whose digits when raised up to consecutive powers give the same +number. For example, 89 = 8**1 + 9**2 gives the number 89. + +The next number after 89 with this property is 135 = 1**1 + 3**2 + 5**3 = 135. + +Write a function that returns a list of numbers with the above property. The function will receive range as parameter. +""" + +def sum_dig_pow(a, b): + result = [] + + for number in range(a, b + 1): + exponent = 1 # set to 1 + sum = 0 # set to 1 + number_as_string = str(i) + + tokens = list(map(int, number_as_string)) # parse the string into individual digits + + for k in tokens: + sum = sum + (k ** exponent) + exponent +=1 + + if sum == number: + result.append(number) + return result + +# Some test cases: + +sum_dig_pow(1, 10) == [1, 2, 3, 4, 5, 6, 7, 8, 9] +sum_dig_pow(1, 100) == [1, 2, 3, 4, 5, 6, 7, 8, 9, 89] From c956556353231812020f8b68729ff9be2b7388d4 Mon Sep 17 00:00:00 2001 From: Saad Date: Wed, 28 Mar 2018 21:24:40 -0500 Subject: [PATCH 150/387] Update README.md --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index d56f727a2..17bb3a649 100644 --- a/README.md +++ b/README.md @@ -129,6 +129,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [rabin_miller](maths/rabin_miller.py) - [rsa](maths/rsa.py) - [sqrt_precision_factor](maths/sqrt_precision_factor.py) + - [Summing_digits](maths/Summing_digits.py) - [matrix](matrix) - [bomb_enemy](matrix/bomb_enemy.py) - [copy_transform](matrix/copy_transform.py) From e5e845c30858cbc96433b256078280be28f18e0c Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Thu, 29 Mar 2018 11:09:11 +0530 Subject: [PATCH 151/387] Rename Summing_digits.py to summing_digits.py --- maths/{Summing_digits.py => summing_digits.py} | 0 1 file changed, 0 insertions(+), 0 deletions(-) rename maths/{Summing_digits.py => summing_digits.py} (100%) diff --git a/maths/Summing_digits.py b/maths/summing_digits.py similarity index 100% rename from maths/Summing_digits.py rename to maths/summing_digits.py From 773564a743f1878efc0e54e366002493cc66ba6a Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Thu, 29 Mar 2018 11:09:50 +0530 Subject: [PATCH 152/387] Update README.md --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index 17bb3a649..7ad7cc226 100644 --- a/README.md +++ b/README.md @@ -129,7 +129,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [rabin_miller](maths/rabin_miller.py) - [rsa](maths/rsa.py) - [sqrt_precision_factor](maths/sqrt_precision_factor.py) - - [Summing_digits](maths/Summing_digits.py) +    - [summing_digits](maths/summing_digits.py) - [matrix](matrix) - [bomb_enemy](matrix/bomb_enemy.py) - [copy_transform](matrix/copy_transform.py) From cf9b49217712ffc2df69695bb373712d92db2328 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Thu, 29 Mar 2018 18:36:11 +0200 Subject: [PATCH 153/387] pulled the origin code and extended the test suite --- map/hashtable.py | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/map/hashtable.py b/map/hashtable.py index 1de554737..1c98ee22c 100644 --- a/map/hashtable.py +++ b/map/hashtable.py @@ -1,5 +1,5 @@ from unittest import TestCase - +import unittest class HashTable(object): """ @@ -154,9 +154,11 @@ def test_get_on_full_table_does_halts(self): def test_delete_key(self): m = HashTable(10) - m.put(1, 1) + for i in range(5): + m.put(i, i**2) m.del_(1) self.assertEqual(None, m.get(1)) + self.assertEqual(4,m.get(2)) def test_delete_key_and_reassign(self): m = HashTable(10) @@ -198,3 +200,13 @@ def test_resizable_hash_table(self): self.assertEqual('foo', m.get(1)) self.assertEqual('foo', m.get(3)) self.assertEqual('foo', m.get(ResizableHashTable.MIN_SIZE - 1)) + + def test_fill_up_the_limit(self): + m = HashTable(10) + for i in range(10): + m.put(i,i**2) + for i in range(10): + self.assertEqual(i**2,m.get(i)) + +if __name__ == "__main__": + unittest.main() \ No newline at end of file From 088ff3475ce3ac80924b2162179fe9689d5a7d83 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Sat, 31 Mar 2018 19:26:41 +0530 Subject: [PATCH 154/387] Add some tests --- array/garage.py | 27 ++++++++++++++++++--------- array/longest_non_repeat.py | 3 ++- array/merge_intervals.py | 3 ++- 3 files changed, 22 insertions(+), 11 deletions(-) diff --git a/array/garage.py b/array/garage.py index 031430475..19b17ea61 100644 --- a/array/garage.py +++ b/array/garage.py @@ -30,9 +30,11 @@ 2 3 0 1 4 0 3 2 1 4 """ +import unittest def garage(initial, final): + initial = initial[::] # create a copy to prevent changes in original 'initial'. steps = 0 seq = [] # list of each step in sequence @@ -49,15 +51,22 @@ def garage(initial, final): break seq.append(initial[::]) steps += 1 - seq = "\n".join(" ".join(map(str, s)) for s in seq) # convert to string + return steps, seq + +class TestSuite(unittest.TestCase): + + def test_garage(self): + + initial = [1, 2, 3, 0, 4] + final = [0, 3, 2, 1, 4] + steps, seq = garage(initial, final) + + self.assertEqual(steps, 4) + self.assertListEqual(seq, [[0, 2, 3, 1, 4], [2, 0, 3, 1, 4], [2, 3, 0, 1, 4], [0, 3, 2, 1, 4]]) + + if __name__ == "__main__": - initial = [1, 2, 3, 0, 4] - final = [0, 3, 2, 1, 4] - print("initial:", initial) - print("final: ", final) - steps, seq = garage(initial, final) - print("No. of Steps = ", steps) - print("Steps Sequence : ") - print(seq) + + unittest.main() diff --git a/array/longest_non_repeat.py b/array/longest_non_repeat.py index 80bce12e5..055df0fd2 100644 --- a/array/longest_non_repeat.py +++ b/array/longest_non_repeat.py @@ -8,6 +8,7 @@ Note that the answer must be a substring, "pwke" is a subsequence and not a substring. """ +import unittest def longest_non_repeat(string): @@ -45,7 +46,6 @@ def longest_non_repeat_two(string): used_char[char] = index return max_len -import unittest class TestLongestNonRepeat(unittest.TestCase): @@ -71,6 +71,7 @@ def test_longest_non_repeat_two(self): string = "pwwkew" self.assertEqual(longest_non_repeat_two(string), 3) + if __name__ == "__main__": unittest.main() diff --git a/array/merge_intervals.py b/array/merge_intervals.py index b39788b0b..faa3ea866 100644 --- a/array/merge_intervals.py +++ b/array/merge_intervals.py @@ -1,6 +1,7 @@ """ Given a collection of intervals, merge all overlapping intervals. """ +import unittest class Interval: @@ -77,7 +78,6 @@ def merge_v2(intervals): out.append(i) return out -import unittest class TestMergeInterval(unittest.TestCase): @@ -98,5 +98,6 @@ def test_merge_v2(self): [[1, 6], [8, 10], [15, 18]] ) + if __name__ == "__main__": unittest.main() From 4325f2c839e87da88ec2e8b19c9a643110918abf Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Sat, 31 Mar 2018 20:28:01 +0530 Subject: [PATCH 155/387] Fix bug in array/plus_one.py and added more tests --- array/missing_ranges.py | 53 +++++++++++++++++++++------------ array/move_zeros_to_end.py | 26 +++++++++++++++-- array/plus_one.py | 60 ++++++++++++++++++++++++++++++-------- 3 files changed, 105 insertions(+), 34 deletions(-) diff --git a/array/missing_ranges.py b/array/missing_ranges.py index 91fc31ccb..a91b1bdd6 100644 --- a/array/missing_ranges.py +++ b/array/missing_ranges.py @@ -1,27 +1,42 @@ -## find missing ranges between low and high in the given array. -# ex) [3, 5] lo=1 hi=10 => answer: [1->2, 4, 6->10] +""" +Find missing ranges between low and high in the given array. +Ex) [3, 5] lo=1 hi=10 => answer: [1->2, 4, 6->10] +""" +import unittest + + +def missing_ranges(arr, lo, hi): -def missing_ranges(nums, lo, hi): res = [] start = lo - for num in nums: - if num < start: - continue - if num == start: + + for n in arr: + + if n == start: start += 1 - continue - res.append(get_range(start, num-1)) - start = num + 1 + elif n > start: + res.append([start, n-1]) + start = n + 1 + if start <= hi: - res.append(get_range(start, hi)) + res.append([start, hi]) + return res -def get_range(n1, n2): - if n1 == n2: - return str(n1) - else: - return str(n1) + "->" + str(n2) -nums = [3, 5, 10, 11, 12, 15, 19] -print("original:", nums) -print("missing range: ", missing_ranges(nums,0,20)) +class TestSuite(unittest.TestCase): + + def test_missing_ranges(self): + + arr = [3, 5, 10, 11, 12, 15, 19] + + self.assertListEqual(missing_ranges(arr, 0, 20), + [[0, 2], [4, 4], [6, 9], [13, 14], [16, 18], [20, 20]]) + + self.assertListEqual(missing_ranges(arr, 6, 100), + [[6, 9], [13, 14], [16, 18], [20, 100]]) + + +if __name__ == '__main__': + + unittest.main() \ No newline at end of file diff --git a/array/move_zeros_to_end.py b/array/move_zeros_to_end.py index d64e55a9a..54ffce441 100644 --- a/array/move_zeros_to_end.py +++ b/array/move_zeros_to_end.py @@ -1,19 +1,39 @@ """ -Write an algorithm that takes an array and moves all of the zeros to the end, preserving the order of the other elements. -move_zeros([false,1,0,1,2,0,1,3,"a"]) # returns[false,1,1,2,1,3,"a",0,0] +Write an algorithm that takes an array and moves all of the zeros to the end, +preserving the order of the other elements. + move_zeros([false, 1, 0, 1, 2, 0, 1, 3, "a"]) + returns => [false, 1, 1, 2, 1, 3, "a", 0, 0] The time complexity of the below algorithm is O(n). """ +import unittest + def move_zeros(array): result = [] zeros = 0 for i in array: - if i is 0 or i is 0.0: # not using `not i` to avoid `False`, `[]`, etc. + if i is 0: # not using `not i` to avoid `False`, `[]`, etc. zeros += 1 else: result.append(i) result.extend([0] * zeros) return result + + +class TestSuite(unittest.TestCase): + + def test_move_zeros(self): + + self.assertListEqual(move_zeros([False, 1, 0, 1, 2, 0, 1, 3, "a"]), + [False, 1, 1, 2, 1, 3, "a", 0, 0]) + + self.assertListEqual(move_zeros([0, 34, 'rahul', [], None, 0, True, 0]), + [34, 'rahul', [], None, True, 0, 0, 0]) + + +if __name__ == '__main__': + + unittest.main() diff --git a/array/plus_one.py b/array/plus_one.py index 65c93e34d..96fa206e4 100644 --- a/array/plus_one.py +++ b/array/plus_one.py @@ -1,11 +1,14 @@ -# Given a non-negative number represented as an array of digits, -# plus one to the number. +""" +Given a non-negative number represented as an array of digits, +plus one to the number. -# The digits are stored such that the most significant -# digit is at the head of the list. +The digits are stored such that the most significant +digit is at the head of the list. +""" +import unittest -def plusOne(digits): +def plus_one(digits): """ :type digits: List[int] :rtype: List[int] @@ -15,18 +18,18 @@ def plusOne(digits): ten = 0 i = len(digits)-1 while i >= 0 or ten == 1: - sum = 0 + summ = 0 if i >= 0: - sum += digits[i] + summ += digits[i] if ten: - sum += 1 - res.append(sum % 10) - ten = sum / 10 + summ += 1 + res.append(summ % 10) + ten = summ // 10 i -= 1 return res[::-1] -def plus_one(digits): +def plus_one_v2(digits): n = len(digits) for i in range(n-1, -1, -1): if digits[i] < 9: @@ -37,9 +40,42 @@ def plus_one(digits): return digits -def plus_1(num_arr): +def plus_one_v3(num_arr): + for idx, digit in reversed(list(enumerate(num_arr))): num_arr[idx] = (num_arr[idx] + 1) % 10 if num_arr[idx]: return num_arr return [1] + num_arr + + +class TestSuite(unittest.TestCase): + + def test_plus_one(self): + + self.assertListEqual(plus_one([0]), [1]) + self.assertListEqual(plus_one([9]), [1, 0]) + self.assertListEqual(plus_one([1, 0, 9]), [1, 1, 0]) + self.assertListEqual(plus_one([9, 9, 8, 0, 0, 9]), [9, 9, 8, 0, 1, 0]) + self.assertListEqual(plus_one([9, 9, 9, 9]), [1, 0, 0, 0, 0]) + + def test_plus_one_v2(self): + + self.assertListEqual(plus_one_v2([0]), [1]) + self.assertListEqual(plus_one_v2([9]), [1, 0]) + self.assertListEqual(plus_one_v2([1, 0, 9]), [1, 1, 0]) + self.assertListEqual(plus_one_v2([9, 9, 8, 0, 0, 9]), [9, 9, 8, 0, 1, 0]) + self.assertListEqual(plus_one_v2([9, 9, 9, 9]), [1, 0, 0, 0, 0]) + + def test_plus_one_v3(self): + + self.assertListEqual(plus_one_v3([0]), [1]) + self.assertListEqual(plus_one_v3([9]), [1, 0]) + self.assertListEqual(plus_one_v3([1, 0, 9]), [1, 1, 0]) + self.assertListEqual(plus_one_v3([9, 9, 8, 0, 0, 9]), [9, 9, 8, 0, 1, 0]) + self.assertListEqual(plus_one_v3([9, 9, 9, 9]), [1, 0, 0, 0, 0]) + + +if __name__ == '__main__': + + unittest.main() \ No newline at end of file From 7df8a9f65a9353093f91d820e297aa40908eb4cb Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Sat, 31 Mar 2018 20:57:57 +0530 Subject: [PATCH 156/387] Fix bug in arrayrotate_array.py and added tests --- array/rotate_array.py | 89 +++++++++++++++++++++++++++++-------------- 1 file changed, 61 insertions(+), 28 deletions(-) diff --git a/array/rotate_array.py b/array/rotate_array.py index 39c989814..b5f9318a2 100644 --- a/array/rotate_array.py +++ b/array/rotate_array.py @@ -8,51 +8,84 @@ Try to come up as many solutions as you can, there are at least 3 different ways to solve this problem. """ +import unittest -# -# Rotate the entire array 'k' times -# T(n)- O(nk) -# -def rotate_one_by_one(nums, k): +def rotate_v1(array, k): """ - :type nums: List[int] + Rotate the entire array 'k' times + T(n)- O(nk) + + :type array: List[int] :type k: int - :rtype: void Do not return anything, modify nums in-place instead. + :rtype: void Do not return anything, modify array in-place instead. """ - n = len(nums) + array = array[:] + n = len(array) for i in range(k): - temp = nums[n-1] + temp = array[n - 1] for j in range(n-1, 0, -1): - nums[j] = nums[j-1] - nums[0] = temp + array[j] = array[j - 1] + array[0] = temp + return array -# -# Reverse segments of the array, followed by the entire array -# T(n)- O(n) -# -def rotate(nums, k): +def rotate_v2(array, k): """ - :type nums: List[int] + Reverse segments of the array, followed by the entire array + T(n)- O(n) + :type array: List[int] :type k: int :rtype: void Do not return anything, modify nums in-place instead. """ - n = len(nums) - k = k % n - reverse(nums, 0, n - k - 1) - reverse(nums, n - k, n - 1) - reverse(nums, 0, n - 1) + array = array[:] + + def reverse(arr, a, b): + while a < b: + arr[a], arr[b] = arr[b], arr[a] + a += 1 + b -= 1 + n = len(array) + k = k % n + reverse(array, 0, n - k - 1) + reverse(array, n - k, n - 1) + reverse(array, 0, n - 1) + return array -def reverse(array, a, b): - while a < b: - array[a], array[b] = array[b], array[a] - a += 1 - b -= 1 -def rotate_array(array, k): +def rotate_v3(array, k): if array is None: return None length = len(array) + k = k % length return array[length - k:] + array[:length - k] + + +class TestSuite(unittest.TestCase): + + def test_rotate_v1(self): + + self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=3), [5, 6, 7, 1, 2, 3, 4]) + self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=1), [7, 1, 2, 3, 4, 5, 6]) + self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=7), [1, 2, 3, 4, 5, 6, 7]) + self.assertListEqual(rotate_v1([1, 2], k=111), [2, 1]) + + def test_rotate_v2(self): + + self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=3), [5, 6, 7, 1, 2, 3, 4]) + self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=1), [7, 1, 2, 3, 4, 5, 6]) + self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=7), [1, 2, 3, 4, 5, 6, 7]) + self.assertListEqual(rotate_v2([1, 2], k=111), [2, 1]) + + def test_rotate_v3(self): + + self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=3), [5, 6, 7, 1, 2, 3, 4]) + self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=1), [7, 1, 2, 3, 4, 5, 6]) + self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=7), [1, 2, 3, 4, 5, 6, 7]) + self.assertListEqual(rotate_v3([1, 2], k=111), [2, 1]) + + +if __name__ == '__main__': + + unittest.main() From fc21b75da6d9161d185dd83b51e7d9db608220b5 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Sat, 31 Mar 2018 22:40:44 +0530 Subject: [PATCH 157/387] completed all tests in array + some bugs fixes --- array/missing_ranges.py | 12 +++++----- array/summary_ranges.py | 42 ++++++++++++++++++++++---------- array/three_sum.py | 53 ++++++++++++++++++++++++++++------------- array/two_sum.py | 26 +++++++++++++------- 4 files changed, 90 insertions(+), 43 deletions(-) diff --git a/array/missing_ranges.py b/array/missing_ranges.py index a91b1bdd6..10f14dc8d 100644 --- a/array/missing_ranges.py +++ b/array/missing_ranges.py @@ -1,6 +1,6 @@ """ Find missing ranges between low and high in the given array. -Ex) [3, 5] lo=1 hi=10 => answer: [1->2, 4, 6->10] +Ex) [3, 5] lo=1 hi=10 => answer: [(1, 2), (4, 4), (6, 10)] """ import unittest @@ -15,11 +15,11 @@ def missing_ranges(arr, lo, hi): if n == start: start += 1 elif n > start: - res.append([start, n-1]) + res.append((start, n-1)) start = n + 1 if start <= hi: - res.append([start, hi]) + res.append((start, hi)) return res @@ -31,12 +31,12 @@ def test_missing_ranges(self): arr = [3, 5, 10, 11, 12, 15, 19] self.assertListEqual(missing_ranges(arr, 0, 20), - [[0, 2], [4, 4], [6, 9], [13, 14], [16, 18], [20, 20]]) + [(0, 2), (4, 4), (6, 9), (13, 14), (16, 18), (20, 20)]) self.assertListEqual(missing_ranges(arr, 6, 100), - [[6, 9], [13, 14], [16, 18], [20, 100]]) + [(6, 9), (13, 14), (16, 18), (20, 100)]) if __name__ == '__main__': - unittest.main() \ No newline at end of file + unittest.main() diff --git a/array/summary_ranges.py b/array/summary_ranges.py index 3cbe5abf4..4f3e9700b 100644 --- a/array/summary_ranges.py +++ b/array/summary_ranges.py @@ -2,26 +2,44 @@ Given a sorted integer array without duplicates, return the summary of its ranges. -For example, given [0,1,2,4,5,7], return ["0->2","4->5","7"]. +For example, given [0, 1, 2, 4, 5, 7], return [(0, 2), (4, 5), (7, 7)]. """ +import unittest -def summary_ranges(nums): +def summary_ranges(array): """ - :type nums: List[int] - :rtype: List[str] + :type array: List[int] + :rtype: List[] """ res = [] - if len(nums) == 1: - return [str(nums[0])] + if len(array) == 1: + return [str(array[0])] i = 0 - while i < len(nums): - num = nums[i] - while i+1 < len(nums) and nums[i+1] - nums[i] == 1: + while i < len(array): + num = array[i] + while i + 1 < len(array) and array[i + 1] - array[i] == 1: i += 1 - if nums[i] != num: - res.append(str(num) + "->" + str(nums[i])) + if array[i] != num: + res.append((num, array[i])) else: - res.append(str(num)) + res.append((num, num)) i += 1 return res + + +class TestSuite(unittest.TestCase): + + def test_summary_ranges(self): + + self.assertListEqual(summary_ranges([0, 1, 2, 4, 5, 7]), + [(0, 2), (4, 5), (7, 7)]) + self.assertListEqual(summary_ranges([-5, -4, -3, 1, 2, 4, 5, 6]), + [(-5, -3), (1, 2), (4, 6)]) + self.assertListEqual(summary_ranges([-2, -1, 0, 1, 2]), + [(-2, 2)]) + + +if __name__ == '__main__': + + unittest.main() \ No newline at end of file diff --git a/array/three_sum.py b/array/three_sum.py index 4b5753347..986534ff9 100644 --- a/array/three_sum.py +++ b/array/three_sum.py @@ -8,39 +8,58 @@ For example, given array S = [-1, 0, 1, 2, -1, -4], A solution set is: -[ - [-1, 0, 1], - [-1, -1, 2] -] +{ + (-1, 0, 1), + (-1, -1, 2) +} """ +import unittest -def three_sum(nums:"List[int]")->"List[int]": - res = [] - nums.sort() - for i in range(len(nums)-2): - if i > 0 and nums[i] == nums[i-1]: +def three_sum(array): + """ + :param array: List[int] + :return: Set[ Tuple[int, int, int] ] + """ + res = set() + array.sort() + for i in range(len(array) - 2): + if i > 0 and array[i] == array[i - 1]: continue - l, r = i+1, len(nums)-1 + l, r = i + 1, len(array) - 1 while l < r: - s = nums[i] + nums[l] + nums[r] + s = array[i] + array[l] + array[r] if s > 0: r -= 1 elif s < 0: l += 1 else: # found three sum - res.append((nums[i], nums[l], nums[r])) + res.add((array[i], array[l], array[r])) + # remove duplicates - while l < r and nums[l] == nums[l+1]: - l+=1 - while l < r and nums[r] == nums[r-1]: + while l < r and array[l] == array[l + 1]: + l += 1 + + while l < r and array[r] == array[r - 1]: r -= 1 + l += 1 r -= 1 return res +class TestSuite(unittest.TestCase): + + def test_three_sum(self): + + self.assertSetEqual(three_sum([-1, 0, 1, 2, -1, -4]), + {(-1, 0, 1), (-1, -1, 2)}) + + self.assertSetEqual(three_sum([-1, 3, 1, 2, -1, -4, -2]), + {(-4, 1, 3), (-2, -1, 3), (-1, -1, 2)}) + + if __name__ == "__main__": - x = [-1,0,1,2,-1,-4] - print(three_sum(x)) + + unittest.main() diff --git a/array/two_sum.py b/array/two_sum.py index 29afd7919..720eeadce 100644 --- a/array/two_sum.py +++ b/array/two_sum.py @@ -9,21 +9,31 @@ Given nums = [2, 7, 11, 15], target = 9, Because nums[0] + nums[1] = 2 + 7 = 9, - return [0, 1]. + return (0, 1) """ +import unittest -def two_sum(nums:"List[int]", target:"int")->"List[int]": +def two_sum(array, target): dic = {} - for i, num in enumerate(nums): + for i, num in enumerate(array): if num in dic: - return [dic[num], i] + return dic[num], i else: dic[target - num] = i + return None + + +class TestSuite(unittest.TestCase): + + def test_two_sum(self): + + self.assertTupleEqual((0, 2), two_sum([2, 11, 7, 9], target=9)) + self.assertTupleEqual((0, 3), two_sum([-3, 5, 2, 3, 8, -9], target=0)) + + self.assertIsNone(two_sum([-3, 5, 2, 3, 8, -9], target=6)) if __name__ == "__main__": - arr = [3,2,4] - target = 6 - res = two_sum(arr, target) - print(res) + + unittest.main() From c55f64ab49d833a029e575af95fc66dd114b2064 Mon Sep 17 00:00:00 2001 From: Dillon Flamand Date: Sat, 31 Mar 2018 16:25:42 -0700 Subject: [PATCH 158/387] Improve issues section of CONTRIBUTING.md The writing in the issues section was confusing, rewrite for clarity. --- CONTRIBUTING.md | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md index 7661a84c4..f18759299 100644 --- a/CONTRIBUTING.md +++ b/CONTRIBUTING.md @@ -36,9 +36,7 @@ Some things that will increase the chance that your pull request is accepted: ## Issues -Whenever you want a new algorithm to be added, or find some bugs in the existing algorithms, -just [submit an issue][newissue] and feel free to discuss over it. -Or you may resolve any of the [existing issues][issues]. +Submit a [new issue][newissue] if there is an algorithm to add, or if a bug was found in an existing algorithm. Before submitting a new issue please review the [existing issues][issues] to avoid creating duplicates. Also, consider resolving current issues or contributing to the discussion on an issue. ## Collaborators You can ask for any help or clarifications from the collaborators. From c79d058140c483669665e334bb1bb5be6b45dfe1 Mon Sep 17 00:00:00 2001 From: Saad Date: Sat, 31 Mar 2018 23:06:27 -0500 Subject: [PATCH 159/387] Create delete_nth.py --- array/delete_nth.py | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 array/delete_nth.py diff --git a/array/delete_nth.py b/array/delete_nth.py new file mode 100644 index 000000000..38dc8502a --- /dev/null +++ b/array/delete_nth.py @@ -0,0 +1,42 @@ +""" +Given a list lst and a number N, create a new list that contains each number of the list at most N times without reordering. + +For example if N = 2, and the input is [1,2,3,1,2,1,2,3], you take [1,2,3,1,2], +drop the next [1,2] since this would lead to 1 and 2 being in the result 3 times, and then take 3, +which leads to [1,2,3,1,2,3] +""" + +# Time complexity O(n) +def delete_nth(order,max_e): + ans = [] + for o in order: + if ans.count(o) < max_e: ans.append(o) + return ans + +# Another approach to solve the same problem using hash tables +# Run time O(n) but O(1) look up time + +def delete_nth(order, max_e): + result = [] # add the final result into this list + my_dict = {} # keep track of occurences + + for i in order: + if not i in my_dict: + # first time so add it to both the dict as well as the result list + my_dict[i] = 1 + result.append(i) + else: + my_dict[i] += 1 # increment the value + count = my_dict[i] + # we still need to add the element if the counter is less than the number specified + if count <= max_e: + result.append(i) + return result + + +# Some test cases +Test.assert_equals(delete_nth([20,37,20,21], 1), [20,37,21], "From list [20,37,20,21],1 you get") +Test.assert_equals(delete_nth([1,1,3,3,7,2,2,2,2], 3), [1, 1, 3, 3, 7, 2, 2, 2], "From list [1,1,3,3,7,2,2,2,2],3 you get ") +Test.assert_equals(delete_nth([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1],3), [1, 2, 3, 1, 1, 2, 2, 3, 3, 4, 5], "From list [1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1],3 you get ") +Test.assert_equals(delete_nth([1,1,1,1,1], 5), [1,1,1,1,1], "From list [1,1,1,1,1],5 you get ") +Test.assert_equals(delete_nth([], 5), [], "From list [],5 you get") From 9e1db997dd40e6073e3b7e6d2f0e616584493323 Mon Sep 17 00:00:00 2001 From: Saad Date: Sat, 31 Mar 2018 23:07:35 -0500 Subject: [PATCH 160/387] Update README.md --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index 7ad7cc226..0b945430e 100644 --- a/README.md +++ b/README.md @@ -26,6 +26,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [three_sum](array/three_sum.py) - [two_sum](array/two_sum.py) - [move_zeros_to_end](array/move_zeros_to_end.py) + - [delete_nth](array/delete_nth.py) - [backtrack](backtrack) - [general_solution.md](backtrack/) - [anagram](backtrack/anagram.py) From d1e1ccb4dcc9905b2a27b7adcc6e7b400b65419b Mon Sep 17 00:00:00 2001 From: Saad Date: Sun, 1 Apr 2018 09:00:26 -0500 Subject: [PATCH 161/387] Update delete.nth.py --- array/delete_nth.py | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/array/delete_nth.py b/array/delete_nth.py index 38dc8502a..c6964c37d 100644 --- a/array/delete_nth.py +++ b/array/delete_nth.py @@ -6,7 +6,7 @@ which leads to [1,2,3,1,2,3] """ -# Time complexity O(n) +# Time complexity O(n^2) def delete_nth(order,max_e): ans = [] for o in order: @@ -35,8 +35,8 @@ def delete_nth(order, max_e): # Some test cases -Test.assert_equals(delete_nth([20,37,20,21], 1), [20,37,21], "From list [20,37,20,21],1 you get") -Test.assert_equals(delete_nth([1,1,3,3,7,2,2,2,2], 3), [1, 1, 3, 3, 7, 2, 2, 2], "From list [1,1,3,3,7,2,2,2,2],3 you get ") -Test.assert_equals(delete_nth([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1],3), [1, 2, 3, 1, 1, 2, 2, 3, 3, 4, 5], "From list [1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1],3 you get ") -Test.assert_equals(delete_nth([1,1,1,1,1], 5), [1,1,1,1,1], "From list [1,1,1,1,1],5 you get ") -Test.assert_equals(delete_nth([], 5), [], "From list [],5 you get") +# Test.assert_equals(delete_nth([20,37,20,21], 1), [20,37,21], "From list [20,37,20,21],1 you get") +# Test.assert_equals(delete_nth([1,1,3,3,7,2,2,2,2], 3), [1, 1, 3, 3, 7, 2, 2, 2], "From list [1,1,3,3,7,2,2,2,2],3 you get ") +# Test.assert_equals(delete_nth([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1],3), [1, 2, 3, 1, 1, 2, 2, 3, 3, 4, 5], "From list [1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1],3 you get ") +# Test.assert_equals(delete_nth([1,1,1,1,1], 5), [1,1,1,1,1], "From list [1,1,1,1,1],5 you get ") +# Test.assert_equals(delete_nth([], 5), [], "From list [],5 you get") From 1f6e24c57c97456900baada95234bc7ce184c5be Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 2 Apr 2018 20:47:21 +0530 Subject: [PATCH 162/387] add tests and fix #182 issue --- bfs/word_ladder.py | 111 ++++++++++++++++++++++++++++++--------------- 1 file changed, 74 insertions(+), 37 deletions(-) diff --git a/bfs/word_ladder.py b/bfs/word_ladder.py index baf5d8d4e..2fdbf294e 100644 --- a/bfs/word_ladder.py +++ b/bfs/word_ladder.py @@ -1,5 +1,5 @@ """ -Given two words (beginWord and endWord), and a dictionary's word list, +Given two words (begin_word and end_word), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord, such that: @@ -8,55 +8,92 @@ For example, Given: -beginWord = "hit" -endWord = "cog" -wordList = ["hot","dot","dog","lot","log"] +begin_word = "hit" +end_word = "cog" +word_list = ["hot","dot","dog","lot","log"] As one shortest transformation is "hit" -> "hot" -> "dot" -> "dog" -> "cog", return its length 5. . Note: -Return 0 if there is no such transformation sequence. +Return -1 if there is no such transformation sequence. All words have the same length. All words contain only lowercase alphabetic characters. """ -def ladderLength(beginWord, endWord, wordList): +import unittest + + +def ladder_length(begin_word, end_word, word_list): """ Bidirectional BFS!!! - :type beginWord: str - :type endWord: str - :type wordList: Set[str] + :type begin_word: str + :type end_word: str + :type word_list: Set[str] :rtype: int """ - beginSet = set() - endSet = set() - beginSet.add(beginWord) - endSet.add(endWord) + if len(begin_word) != len(end_word): + return -1 # not possible + + if begin_word == end_word: + return 0 + + # when only differ by 1 character + if sum(c1 != c2 for c1, c2 in zip(begin_word, end_word)) == 1: + return 1 + + begin_set = set() + end_set = set() + begin_set.add(begin_word) + end_set.add(end_word) result = 2 - while len(beginSet) != 0 and len(endSet) != 0: - if len(beginSet) > len(endSet): - beginSet, endSet = endSet, beginSet - nextBeginSet = set() - for word in beginSet: - for ladderWord in wordRange(word): - if ladderWord in endSet: + while begin_set and end_set: + + if len(begin_set) > len(end_set): + begin_set, end_set = end_set, begin_set + + next_begin_set = set() + for word in begin_set: + for ladder_word in word_range(word): + if ladder_word in end_set: return result - if ladderWord in wordList: - nextBeginSet.add(ladderWord) - wordList.remove(ladderWord) - beginSet = nextBeginSet + if ladder_word in word_list: + next_begin_set.add(ladder_word) + word_list.remove(ladder_word) + begin_set = next_begin_set result += 1 - print(beginSet) - print(result) - return 0 + # print(begin_set) + # print(result) + return -1 + -def wordRange(word): +def word_range(word): for ind in range(len(word)): - tempC = word[ind] - for c in [chr(x) for x in range(ord('a'), ord('z')+1)]: - if c != tempC: - yield word[:ind] + c + word[ind+1:] - -beginWord = "hit" -endWord = "cog" -wordList = ["hot","dot","dog","lot","log"] -print(ladderLength(beginWord, endWord, wordList)) + temp = word[ind] + for c in [chr(x) for x in range(ord('a'), ord('z') + 1)]: + if c != temp: + yield word[:ind] + c + word[ind + 1:] + + +class TestSuite(unittest.TestCase): + + def test_ladder_length(self): + + # hit -> hot -> dot -> dog -> cog + self.assertEqual(5, ladder_length('hit', 'cog', ["hot", "dot", "dog", "lot", "log"])) + + # pick -> sick -> sink -> sank -> tank == 5 + self.assertEqual(5, ladder_length('pick', 'tank', + ['tock', 'tick', 'sank', 'sink', 'sick'])) + + # live -> life == 1, no matter what is the word_list. + self.assertEqual(1, ladder_length('live', 'life', ['hoho', 'luck'])) + + # 0 length from ate -> ate + self.assertEqual(0, ladder_length('ate', 'ate', [])) + + # not possible to reach ! + self.assertEqual(-1, ladder_length('rahul', 'coder', ['blahh', 'blhah'])) + + +if __name__ == '__main__': + + unittest.main() From e73e7dfaf1ede696db3112589d2c2417726f9957 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 2 Apr 2018 21:59:36 +0530 Subject: [PATCH 163/387] add tests and another approach for find_missing_number.py --- README.md | 2 +- README_CN.md | 2 +- bit/add_without_operator.py | 19 +++++++++---- bit/count_ones.py | 50 ++++++++++++++++++++++++++++++--- bit/find_missing_number.py | 55 ++++++++++++++++++++++++++++++++----- tree.md | 2 +- 6 files changed, 110 insertions(+), 20 deletions(-) diff --git a/README.md b/README.md index 7ad7cc226..0fa2d940c 100644 --- a/README.md +++ b/README.md @@ -54,7 +54,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [single_number2](bit/single_number2.py) - [single_number](bit/single_number.py) - [subsets](bit/subsets.py) - - [add_without_operator](bit/add_without_operator.py) + - [add_bitwise_operator](bit/add_without_operator.py) - [calculator](calculator) - [math_parser](calculator/math_parser.py) - [dfs](dfs) diff --git a/README_CN.md b/README_CN.md index 3e1bb861e..b788c9285 100644 --- a/README_CN.md +++ b/README_CN.md @@ -48,7 +48,7 @@ python版数据结构和算法实现的简约版小示例 - [single_number2：寻找出现1次的数（2)](bit/single_number2.py) - [single_number:寻找出现1次的数（1)](bit/single_number.py) - [subsets: 求所有子集](bit/subsets.py) - - [add_without_operator：无操作符的加法](bit/add_without_operator.py) + - [add_bitwise_operator：无操作符的加法](bit/add_without_operator.py) - [calculator：计算](calculator) - [math_parser: 数字解析](calculator/math_parser.py) - [dfs：深度优先搜索](dfs) diff --git a/bit/add_without_operator.py b/bit/add_without_operator.py index 1ec1490d9..5d3f5e622 100644 --- a/bit/add_without_operator.py +++ b/bit/add_without_operator.py @@ -5,20 +5,27 @@ Input: 2 3 Output: 5 """ +import unittest -def addWithoutOperator(x, y): +def add_bitwise_operator(x, y): + while y != 0: carry = x & y x = x ^ y y = carry << 1 - print(x) + return x + + +class TestSuite(unittest.TestCase): + def test_add_bitwise_operator(self): -def main(): - x, y = map(int, input('Enter two positive integers: ').split()) - addWithoutOperator(x, y) + self.assertEqual(5432 + 97823, add_bitwise_operator(5432, 97823)) + self.assertEqual(0, add_bitwise_operator(0, 0)) + self.assertEqual(10, add_bitwise_operator(10, 0)) + self.assertEqual(10, add_bitwise_operator(0, 10)) if __name__ == '__main__': - main() + unittest.main() diff --git a/bit/count_ones.py b/bit/count_ones.py index f9442db81..e6d25d16e 100644 --- a/bit/count_ones.py +++ b/bit/count_ones.py @@ -14,16 +14,58 @@ Number of loops is equal to the number of 1s in the binary representation.""" +import unittest -def count_ones(n): + +def count_ones_recur(n): """Using Brian Kernighan’s Algorithm. (Recursive Approach)""" - if not n: return 0 - return 1 + count_ones(n & (n-1)) -def count_ones(n): + if not n: + return 0 + return 1 + count_ones_recur(n & (n-1)) + + +def count_ones_iter(n): """Using Brian Kernighan’s Algorithm. (Iterative Approach)""" + count = 0 while n: n &= (n-1) count += 1 return count + + +class TestSuite(unittest.TestCase): + + def test_count_ones_recur(self): + + # 8 -> 1000 + self.assertEqual(1, count_ones_recur(8)) + + # 109 -> 1101101 + self.assertEqual(5, count_ones_recur(109)) + + # 63 -> 111111 + self.assertEqual(6, count_ones_recur(63)) + + # 0 -> 0 + self.assertEqual(0, count_ones_recur(0)) + + def test_count_ones_iter(self): + + # 8 -> 1000 + self.assertEqual(1, count_ones_iter(8)) + + # 109 -> 1101101 + self.assertEqual(5, count_ones_iter(109)) + + # 63 -> 111111 + self.assertEqual(6, count_ones_iter(63)) + + # 0 -> 0 + self.assertEqual(0, count_ones_iter(0)) + + +if __name__ == '__main__': + + unittest.main() \ No newline at end of file diff --git a/bit/find_missing_number.py b/bit/find_missing_number.py index 115ce4855..e472ba51a 100644 --- a/bit/find_missing_number.py +++ b/bit/find_missing_number.py @@ -1,14 +1,14 @@ -def find_missing_number(nums): - """Returns the missing number from a sequence of unique integers +""" + Returns the missing number from a sequence of unique integers in range [0..n] in O(n) time and space. The difference between consecutive integers cannot be more than 1. If the sequence is already complete, the next integer in the sequence will be returned. +""" +import unittest +import random + - >>> find_missing_number(i for i in range(0, 10000) if i != 1234) - 1234 - >>> find_missing_number([4, 1, 3, 0, 6, 5, 2]) - 7 - """ +def find_missing_number(nums): missing = 0 for i, num in enumerate(nums): @@ -16,3 +16,44 @@ def find_missing_number(nums): missing ^= i + 1 return missing + + +def find_missing_number2(nums): + + num_sum = sum(nums) + n = len(nums) + total_sum = n*(n+1) // 2 + missing = total_sum - num_sum + return missing + + +class TestSuite(unittest.TestCase): + + def setUp(self): + """Initialize seed.""" + random.seed("test") + + def test_find_missing_number(self): + + self.assertEqual(7, find_missing_number([4, 1, 3, 0, 6, 5, 2])) + self.assertEqual(0, find_missing_number([1])) + self.assertEqual(1, find_missing_number([0])) + + nums = [i for i in range(100000) if i != 12345] + random.shuffle(nums) + self.assertEqual(12345, find_missing_number(nums)) + + def test_find_missing_number2(self): + + self.assertEqual(7, find_missing_number2([4, 1, 3, 0, 6, 5, 2])) + self.assertEqual(0, find_missing_number2([1])) + self.assertEqual(1, find_missing_number2([0])) + + nums = [i for i in range(100000) if i != 12345] + random.shuffle(nums) + self.assertEqual(12345, find_missing_number2(nums)) + + +if __name__ == '__main__': + + unittest.main() diff --git a/tree.md b/tree.md index 9f35af3e1..069df396d 100644 --- a/tree.md +++ b/tree.md @@ -34,7 +34,7 @@ │   ├── shortest_distance_from_all_buildings.py │   └── word_ladder.py ├── bit -│   ├── add_without_operator.py +│   ├── add_bitwise_operator.py │   ├── bytes_int_conversion.py │   ├── count_ones.py │   ├── find_missing_number.py From 466a6751512a0951dd4b11703a547164dd824cda Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 2 Apr 2018 23:22:44 +0530 Subject: [PATCH 164/387] completed tests in bit module + some fixes --- bit/add_without_operator.py | 2 +- bit/power_of_two.py | 17 ++++++++++ bit/reverse_bits.py | 21 ++++++++++++ bit/single_number.py | 31 +++++++++++++++++ bit/single_number2.py | 43 +++++++++++++++++++++-- bit/subsets.py | 68 +++++++++++++++++++++---------------- 6 files changed, 149 insertions(+), 33 deletions(-) diff --git a/bit/add_without_operator.py b/bit/add_without_operator.py index 5d3f5e622..af0e7fff8 100644 --- a/bit/add_without_operator.py +++ b/bit/add_without_operator.py @@ -10,7 +10,7 @@ def add_bitwise_operator(x, y): - while y != 0: + while y: carry = x & y x = x ^ y y = carry << 1 diff --git a/bit/power_of_two.py b/bit/power_of_two.py index bdb629471..c70c6247b 100644 --- a/bit/power_of_two.py +++ b/bit/power_of_two.py @@ -1,6 +1,7 @@ """ given an integer, write a function to determine if it is a power of two """ +import unittest def is_power_of_two(n): @@ -9,3 +10,19 @@ def is_power_of_two(n): :rtype: bool """ return n > 0 and not n & (n-1) + + +class TestSuite(unittest.TestCase): + + def test_is_power_of_two(self): + + self.assertTrue(is_power_of_two(64)) + self.assertFalse(is_power_of_two(91)) + self.assertTrue(is_power_of_two(2**1001)) + self.assertTrue(is_power_of_two(1)) + self.assertFalse(is_power_of_two(0)) + + +if __name__ == '__main__': + + unittest.main() diff --git a/bit/reverse_bits.py b/bit/reverse_bits.py index 06beebf39..0f8077a23 100644 --- a/bit/reverse_bits.py +++ b/bit/reverse_bits.py @@ -6,6 +6,7 @@ return 964176192 (represented in binary as 00111001011110000010100101000000). """ +import unittest def reverse_bits(n): @@ -16,3 +17,23 @@ def reverse_bits(n): n >>= 1 i += 1 return m + + +class TestSuite(unittest.TestCase): + + def test_reverse_bits(self): + + self.assertEqual(43261596, reverse_bits(964176192)) + self.assertEqual(964176192, reverse_bits(43261596)) + self.assertEqual(1, reverse_bits(2147483648)) + + # bin(0) => 00000000000000000000000000000000 + self.assertEqual(0, reverse_bits(0)) + + # bin(2**32 - 1) => 11111111111111111111111111111111 + self.assertEqual(2**32 - 1, reverse_bits(2**32 - 1)) + + +if __name__ == '__main__': + + unittest.main() \ No newline at end of file diff --git a/bit/single_number.py b/bit/single_number.py index 756c3d79e..50a3a507f 100644 --- a/bit/single_number.py +++ b/bit/single_number.py @@ -2,14 +2,22 @@ Given an array of integers, every element appears twice except for one. Find that single one. +NOTE: This also works for finding a number occurring odd + number of times, where all the other numbers appear + even number of times. + Note: Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory? """ +import unittest +import random def single_number(nums): """ + Returns single number, if found. + Else if all numbers appear twice, returns 0. :type nums: List[int] :rtype: int """ @@ -17,3 +25,26 @@ def single_number(nums): for num in nums: i ^= num return i + + +class TestSuite(unittest.TestCase): + + def test_single_number(self): + + random.seed('test') + + self.assertEqual(0, single_number([1, 0, 2, 1, 2, 3, 3])) + self.assertEqual(101, single_number([101])) + + single = random.randint(1, 100000) + nums = [random.randint(1, 100000) for _ in range(1000)] + nums *= 2 # nums contains pairs of random integers + nums.append(single) + random.shuffle(nums) + + self.assertEqual(single, single_number(nums)) + + +if __name__ == '__main__': + + unittest.main() diff --git a/bit/single_number2.py b/bit/single_number2.py index 8646b2149..3ee682d1f 100644 --- a/bit/single_number2.py +++ b/bit/single_number2.py @@ -6,10 +6,9 @@ Note: Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory? -""" -""" +Solution: 32 bits for each integer. Consider 1 bit in it, the sum of each integer's corresponding bit (except for the single number) @@ -18,6 +17,8 @@ the remaining should be the exact bit of the single number. In this way, you get the 32 bits of the single number. """ +import unittest +import random def single_number(nums): @@ -29,7 +30,7 @@ def single_number(nums): for i in range(0, 32): count = 0 for num in nums: - if ((num >> i) & 1): + if (num >> i) & 1: count += 1 res |= ((count % 3) << i) if res >= 2**31: @@ -44,3 +45,39 @@ def single_number2(nums): ones = (ones ^ nums[i]) & ~twos twos = (twos ^ nums[i]) & ~ones return ones + + +class TestSuite(unittest.TestCase): + + def test_single_number(self): + + random.seed("test") + + self.assertEqual(3, single_number([4, 2, 3, 2, 1, 1, 4, 2, 4, 1])) + + single = random.randint(1, 100000) + nums = [random.randint(1, 100000) for _ in range(1000)] + nums *= 3 # nums contains triplets of random integers + nums.append(single) + random.shuffle(nums) + + self.assertEqual(single, single_number(nums)) + + def test_single_number2(self): + + random.seed("test") + + self.assertEqual(3, single_number2([4, 2, 3, 2, 1, 1, 4, 2, 4, 1])) + + single = random.randint(1, 100000) + nums = [random.randint(1, 100000) for _ in range(1000)] + nums *= 3 # nums contains triplets of random integers + nums.append(single) + random.shuffle(nums) + + self.assertEqual(single, single_number2(nums)) + + +if __name__ == '__main__': + + unittest.main() \ No newline at end of file diff --git a/bit/subsets.py b/bit/subsets.py index 8eafd79f4..53ad3cbcf 100644 --- a/bit/subsets.py +++ b/bit/subsets.py @@ -7,44 +7,54 @@ For example, If nums = [1,2,3], a solution is: -[ - [3], - [1], - [2], - [1,2,3], - [1,3], - [2,3], - [1,2], - [] -] +{ + (1, 2), + (1, 3), + (1,), + (2,), + (3,), + (1, 2, 3), + (), + (2, 3) +} """ +import unittest -def subnets(nums): - nums.sort() - total = 2 ** len(nums) # or 1 << len(nums) - res = [] * total +def subsets(nums): + """ + :param nums: List[int] + :return: Set[tuple] + """ + # nums.sort() # no need for sort + n = len(nums) + total = 1 << n + res = set() for i in range(total): - res.append([]) + subset = tuple(num for j, num in enumerate(nums) if i & 1 << j) + res.add(subset) - for i in range(len(nums)): - for j in range(total): - if ((j >> i) & 1) > 0: # i & 1 << j - res[j].append(nums[i]) return res -def subsets2(self, nums): - res = [] - nums.sort() - for i in range(1 << len(nums)): - tmp = [] - for j in range(len(nums)): - if i & 1 << j: # if i >> j & 1: - tmp.append(nums[j]) - res.append(tmp) - return res +class TestSuite(unittest.TestCase): + + def test_subsets(self): + + self.assertSetEqual(subsets([1, 2, 3]), + {(), (1,), (2,), (3,), (1, 2), (1, 3), (2, 3), (1, 2, 3)}) + + self.assertSetEqual(subsets([10, 20, 30, 40]), + {(10, 40), (10, 20, 40), (10, 30), (10, 20, 30, 40), (40,), + (10, 30, 40), (30,), (20, 30), (30, 40), (10,), (), + (10, 20), (20, 40), (20, 30, 40), (10, 20, 30), (20,)}) + + +if __name__ == '__main__': + + unittest.main() + """ this explanation is from leet_nik @ leetcode From 9c862398091da236756e7b08e41aa6424ff9333f Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 2 Apr 2018 23:29:38 +0530 Subject: [PATCH 165/387] minor update --- bit/single_number2.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/bit/single_number2.py b/bit/single_number2.py index 3ee682d1f..2c7fd2d3e 100644 --- a/bit/single_number2.py +++ b/bit/single_number2.py @@ -49,10 +49,12 @@ def single_number2(nums): class TestSuite(unittest.TestCase): - def test_single_number(self): + def setUp(self): random.seed("test") + def test_single_number(self): + self.assertEqual(3, single_number([4, 2, 3, 2, 1, 1, 4, 2, 4, 1])) single = random.randint(1, 100000) @@ -65,8 +67,6 @@ def test_single_number(self): def test_single_number2(self): - random.seed("test") - self.assertEqual(3, single_number2([4, 2, 3, 2, 1, 1, 4, 2, 4, 1])) single = random.randint(1, 100000) From 5b2de29f84959f11dfa36d2a3a3d5cb3182b45dd Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 3 Apr 2018 13:38:44 +0530 Subject: [PATCH 166/387] review changes and README update --- README.md | 6 +++--- README_CN.md | 2 +- bit/{add_without_operator.py => add_bitwise_operator.py} | 0 bit/subsets.py | 1 - 4 files changed, 4 insertions(+), 5 deletions(-) rename bit/{add_without_operator.py => add_bitwise_operator.py} (100%) diff --git a/README.md b/README.md index 0fa2d940c..714f0b444 100644 --- a/README.md +++ b/README.md @@ -54,7 +54,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [single_number2](bit/single_number2.py) - [single_number](bit/single_number.py) - [subsets](bit/subsets.py) - - [add_bitwise_operator](bit/add_without_operator.py) + - [add_bitwise_operator](bit/add_bitwise_operator.py) - [calculator](calculator) - [math_parser](calculator/math_parser.py) - [dfs](dfs) @@ -234,9 +234,9 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [count_islands](union-find/count_islands.py) ## Contributors -The repo is maintained by +The repo is maintained by -* [Keon Kim](https://github.com/keon) +* [Keon Kim](https://github.com/keon) * [Rahul Goswami](https://github.com/goswami-rahul) * [Christian Bender](https://github.com/christianbender) * [Ankit Agarwal](https://github.com/ankit167) diff --git a/README_CN.md b/README_CN.md index b788c9285..1c832ee8b 100644 --- a/README_CN.md +++ b/README_CN.md @@ -48,7 +48,7 @@ python版数据结构和算法实现的简约版小示例 - [single_number2：寻找出现1次的数（2)](bit/single_number2.py) - [single_number:寻找出现1次的数（1)](bit/single_number.py) - [subsets: 求所有子集](bit/subsets.py) - - [add_bitwise_operator：无操作符的加法](bit/add_without_operator.py) + - [add_bitwise_operator：无操作符的加法](bit/add_bitwise_operator.py) - [calculator：计算](calculator) - [math_parser: 数字解析](calculator/math_parser.py) - [dfs：深度优先搜索](dfs) diff --git a/bit/add_without_operator.py b/bit/add_bitwise_operator.py similarity index 100% rename from bit/add_without_operator.py rename to bit/add_bitwise_operator.py diff --git a/bit/subsets.py b/bit/subsets.py index 53ad3cbcf..e2e44fa9f 100644 --- a/bit/subsets.py +++ b/bit/subsets.py @@ -26,7 +26,6 @@ def subsets(nums): :param nums: List[int] :return: Set[tuple] """ - # nums.sort() # no need for sort n = len(nums) total = 1 << n res = set() From e6d4b514897d88acb0976ca3e052a0b0f404f6e6 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 3 Apr 2018 13:47:17 +0530 Subject: [PATCH 167/387] Update README.md --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index 714f0b444..df8171115 100644 --- a/README.md +++ b/README.md @@ -129,7 +129,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [rabin_miller](maths/rabin_miller.py) - [rsa](maths/rsa.py) - [sqrt_precision_factor](maths/sqrt_precision_factor.py) -    - [summing_digits](maths/summing_digits.py) + - [summing_digits](maths/summing_digits.py) - [matrix](matrix) - [bomb_enemy](matrix/bomb_enemy.py) - [copy_transform](matrix/copy_transform.py) From 96d4ef4f35f96e3402d3cbafa412c54353f42f92 Mon Sep 17 00:00:00 2001 From: Saad Date: Wed, 4 Apr 2018 21:26:02 -0500 Subject: [PATCH 168/387] Add next bigger number --- maths/next_bigger.py | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 maths/next_bigger.py diff --git a/maths/next_bigger.py b/maths/next_bigger.py new file mode 100644 index 000000000..f2dade279 --- /dev/null +++ b/maths/next_bigger.py @@ -0,0 +1,38 @@ +""" +I just bombed an interview and made pretty much zero +progress on my interview question. + +Given a number, find the next higher number which has the +exact same set of digits as the original number. +For example: given 38276 return 38627. + +""" + +""" +Condensed mathematical description: + +Find largest index i such that array[i − 1] < array[i]. +(If no such i exists, then this is already the last permutation.) + +Find largest index j such that j ≥ i and array[j] > array[i − 1]. + +Swap array[j] and array[i − 1]. + +Reverse the suffix starting at array[i]. + +""" + +def next_bigger(num): + digits = [int(i) for i in str(num)] + idx = len(digits) - 1 + while idx >= 1 and digits[idx-1] >= digits[idx]: + idx -= 1 + if idx == 0: + return -1 + pivot = digits[idx-1] + swap_idx = len(digits) - 1 + while pivot >= digits[swap_idx]: + swap_idx -= 1 + digits[swap_idx], digits[idx-1] = digits[idx-1], digits[swap_idx] + digits[idx:] = digits[:idx-1:-1] # prefer slicing instead of reversed(digits[idx:]) + return int(''.join(str(x) for x in digits)) \ No newline at end of file From ab1117ad7496129862059c69d8b029ccf62b9c5f Mon Sep 17 00:00:00 2001 From: danghai Date: Wed, 4 Apr 2018 14:54:48 -0700 Subject: [PATCH 169/387] Add is_sort to linkedlist --- README.md | 3 ++- linkedlist/is_sort.py | 46 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 48 insertions(+), 1 deletion(-) create mode 100644 linkedlist/is_sort.py diff --git a/README.md b/README.md index 07f2959a3..8bc3f5e13 100644 --- a/README.md +++ b/README.md @@ -111,6 +111,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [reverse](linkedlist/reverse.py) - [rotate_list](linkedlist/rotate_list.py) - [swap_in_pairs](linkedlist/swap_in_pairs.py) + - [is_sort](linkedlist/is_sort.py) - [map](map) - [hashtable](map/hashtable.py) - [longest_common_subsequence](map/longest_common_subsequence.py) @@ -242,5 +243,5 @@ The repo is maintained by * [Christian Bender](https://github.com/christianbender) * [Ankit Agarwal](https://github.com/ankit167) -And thanks to [all the contributors](https://github.com/keon/algorithms/graphs/contributors) +And thanks to [all the contributors](https://github.com/keon/algorithms/graphs/contributors) who helped in building the repo. diff --git a/linkedlist/is_sort.py b/linkedlist/is_sort.py new file mode 100644 index 000000000..3c861c206 --- /dev/null +++ b/linkedlist/is_sort.py @@ -0,0 +1,46 @@ +""" +Given a linked list, is_sort function returns true if the list is in sorted +(increasing) order and return false otherwise. An empty list is considered +to be sorted. + +For example: +Null :List is sorted +1 2 3 4 :List is sorted +1 2 -1 3 :List is not sorted +""" + +class Node: + def __init__(self, x): + self.val = x + self.next = None + +def is_sort(head): + if not head: + return True + current = head + while current.next: + if current.val > current.next.val: + return False + current = current.next + return True + +if __name__ == "__main__": + n = Node(None) + # Test case: 1 2 3 4 : List is sorted + n = Node(1) + n.next = Node(2) + n.next.next = Node(3) + n.next.next.next = Node(4) + if is_sort(n) == True: + print("List is sorted\n") + else: + print("List is not sorted\n") + # Test case: 1 2 -1 3 : List is not sorted + n = Node(1) + n.next = Node(2) + n.next.next = Node(-1) + n.next.next.next = Node(3) + if is_sort(n) == True: + print("List is sorted\n") + else: + print("List is not sorted\n") From 3e628deb3a856696b8403dd2cda5afbb7f7e3b96 Mon Sep 17 00:00:00 2001 From: danghai Date: Wed, 4 Apr 2018 20:23:33 -0700 Subject: [PATCH 170/387] Add remove_range to linkedlist --- README.md | 1 + linkedlist/remove_range.py | 60 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 61 insertions(+) create mode 100644 linkedlist/remove_range.py diff --git a/README.md b/README.md index 8bc3f5e13..b3dce711e 100644 --- a/README.md +++ b/README.md @@ -112,6 +112,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [rotate_list](linkedlist/rotate_list.py) - [swap_in_pairs](linkedlist/swap_in_pairs.py) - [is_sort](linkedlist/is_sort.py) + - [remove_range](linkedlist/remove_range.py) - [map](map) - [hashtable](map/hashtable.py) - [longest_common_subsequence](map/longest_common_subsequence.py) diff --git a/linkedlist/remove_range.py b/linkedlist/remove_range.py new file mode 100644 index 000000000..b1a0e7f6e --- /dev/null +++ b/linkedlist/remove_range.py @@ -0,0 +1,60 @@ +""" +Given a linked list, remove_range function accepts a starting and ending index +as parameters and removes the elements at those indexes (inclusive) from the list + +For example: +List: [8, 13, 17, 4, 9, 12, 98, 41, 7, 23, 0, 92] +remove_range(list, 3, 8); +List becomes: [8, 13, 17, 23, 0, 92] + +legal range of the list (0 < start index < end index < size of list). +""" + +class Node: + def __init__(self,x): + self.val = x + self.next = None + +def remove_range(head, start, end): + assert(start <= end) + # Case: remove node at head + if start == 0: + for i in range(0, end+1): + if head != None: + head = head.next + else: + current = head + # Move pointer to start position + for i in range(0,start-1): + current = current.next + # Remove data until the end + for i in range(0, end-start + 1): + if current != None and current.next != None: + current.next = current.next.next + return head + +if __name__ == "__main__": + # Test case: middle case. + head = Node(None) + head = Node(0) + head.next = Node(1) + head.next.next = Node(2) + head.next.next.next = Node(3) + head.next.next.next.next = Node(4) + result = remove_range(head,1,3) # Expect output: 0 4 + # Test case: taking out the front node + head = Node(None) + head = Node(0) + head.next = Node(1) + head.next.next = Node(2) + head.next.next.next = Node(3) + head.next.next.next.next = Node(4) + result = remove_range(head,0,1) # Expect output: 2 3 4 + # Test case: removing all the nodes + head = Node(None) + head = Node(0) + head.next = Node(1) + head.next.next = Node(2) + head.next.next.next = Node(3) + head.next.next.next.next = Node(4) + result = remove_range(head,0,7) # Expect output: Null From cab46bc97eb059e19c3f0ccd71249ce36e10e63d Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Thu, 5 Apr 2018 17:07:01 +0530 Subject: [PATCH 171/387] some fixes and add some tests to linkedlist/ --- README.md | 5 +- array/delete_nth.py | 90 ++++++++++++------- linkedlist/add_two_numbers.py | 43 ++++----- linkedlist/delete_node.py | 48 ++++++++++ linkedlist/first_cyclic_node.py | 37 +++++++- linkedlist/intersection.py | 26 +++--- maths/next_bigger.py | 38 ++++++-- .../red_black_tree.py} | 0 8 files changed, 215 insertions(+), 72 deletions(-) rename tree/{rbtree/rbtree.py => red_black_tree/red_black_tree.py} (100%) diff --git a/README.md b/README.md index b3dce711e..bb4bd494b 100644 --- a/README.md +++ b/README.md @@ -124,6 +124,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [gcd/lcm](maths/gcd.py) - [generate_strobogrammtic](maths/generate_strobogrammtic.py) - [is_strobogrammatic](maths/is_strobogrammatic.py) + - [next_bigger](maths/next_bigger.py) - [next_perfect_square](maths/next_perfect_square.py) - [nth_digit](maths/nth_digit.py) - [prime_test](maths/prime_test.py) @@ -205,8 +206,8 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [serialize_deserialize](tree/bst/serialize_deserialize.py) - [successor](tree/bst/successor.py) - [unique_bst](tree/bst/unique_bst.py) - - [rbtree](tree/rbtree) - - [rbtree](tree/rbtree/rbtree.py) + - [red_black_tree](tree/red_black_tree) + - [red_black_tree](tree/red_black_tree/red_black_tree.py) - [segment_tree](tree/segment_tree) - [segment_tree](tree/segment_tree/segment_tree.py) - [traversal](tree/traversal) diff --git a/array/delete_nth.py b/array/delete_nth.py index c6964c37d..b44cdd3d0 100644 --- a/array/delete_nth.py +++ b/array/delete_nth.py @@ -1,42 +1,68 @@ """ -Given a list lst and a number N, create a new list that contains each number of the list at most N times without reordering. +Given a list lst and a number N, create a new list +that contains each number of the list at most N times without reordering. For example if N = 2, and the input is [1,2,3,1,2,1,2,3], you take [1,2,3,1,2], drop the next [1,2] since this would lead to 1 and 2 being in the result 3 times, and then take 3, which leads to [1,2,3,1,2,3] """ +import collections +import unittest + # Time complexity O(n^2) -def delete_nth(order,max_e): +def delete_nth_naive(array, n): ans = [] - for o in order: - if ans.count(o) < max_e: ans.append(o) + for num in array: + if ans.count(num) < n: + ans.append(num) return ans - -# Another approach to solve the same problem using hash tables -# Run time O(n) but O(1) look up time - -def delete_nth(order, max_e): - result = [] # add the final result into this list - my_dict = {} # keep track of occurences - - for i in order: - if not i in my_dict: - # first time so add it to both the dict as well as the result list - my_dict[i] = 1 - result.append(i) - else: - my_dict[i] += 1 # increment the value - count = my_dict[i] - # we still need to add the element if the counter is less than the number specified - if count <= max_e: - result.append(i) - return result - - -# Some test cases -# Test.assert_equals(delete_nth([20,37,20,21], 1), [20,37,21], "From list [20,37,20,21],1 you get") -# Test.assert_equals(delete_nth([1,1,3,3,7,2,2,2,2], 3), [1, 1, 3, 3, 7, 2, 2, 2], "From list [1,1,3,3,7,2,2,2,2],3 you get ") -# Test.assert_equals(delete_nth([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1],3), [1, 2, 3, 1, 1, 2, 2, 3, 3, 4, 5], "From list [1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1],3 you get ") -# Test.assert_equals(delete_nth([1,1,1,1,1], 5), [1,1,1,1,1], "From list [1,1,1,1,1],5 you get ") -# Test.assert_equals(delete_nth([], 5), [], "From list [],5 you get") + + +# Time Complexity O(n), using hash tables. +def delete_nth(array, n): + result = [] + counts = collections.defaultdict(int) # keep track of occurrences + + for i in array: + + if counts[i] < n: + result.append(i) + counts[i] += 1 + + return result + + +class TestSuite(unittest.TestCase): + + def test_delete_nth_naive(self): + + self.assertListEqual(delete_nth_naive([20, 37, 20, 21, 37, 21, 21], n=1), + [20, 37, 21]) + self.assertListEqual(delete_nth_naive([1, 1, 3, 3, 7, 2, 2, 2, 2], n=3), + [1, 1, 3, 3, 7, 2, 2, 2]) + self.assertListEqual(delete_nth_naive([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=3), + [1, 2, 3, 1, 1, 2, 2, 3, 3, 4, 5]) + self.assertListEqual(delete_nth_naive([], n=5), + []) + self.assertListEqual(delete_nth_naive([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=0), + []) + + def test_delete_nth(self): + + self.assertListEqual(delete_nth([20, 37, 20, 21, 37, 21, 21], n=1), + [20, 37, 21]) + self.assertListEqual(delete_nth([1, 1, 3, 3, 7, 2, 2, 2, 2], n=3), + [1, 1, 3, 3, 7, 2, 2, 2]) + self.assertListEqual(delete_nth([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=3), + [1, 2, 3, 1, 1, 2, 2, 3, 3, 4, 5]) + self.assertListEqual(delete_nth([], n=5), + []) + self.assertListEqual(delete_nth([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=0), + []) + + +if __name__ == '__main__': + + unittest.main() + diff --git a/linkedlist/add_two_numbers.py b/linkedlist/add_two_numbers.py index f772b87e0..02f7eff6b 100644 --- a/linkedlist/add_two_numbers.py +++ b/linkedlist/add_two_numbers.py @@ -13,13 +13,14 @@ import unittest + class Node: def __init__(self, x): self.val = x self.next = None -def add_two_numbers(left: Node, right: Node )-> Node: +def add_two_numbers(left: Node, right: Node) -> Node: head = Node(0) current = head sum = 0 @@ -39,7 +40,7 @@ def add_two_numbers(left: Node, right: Node )-> Node: return head.next -def convert_to_list(number : int) -> Node: +def convert_to_list(number: int) -> Node: """ converts a positive integer into a (reversed) linked list. for example: give 112 @@ -50,7 +51,7 @@ def convert_to_list(number : int) -> Node: current = head remainder = number % 10 quotient = number // 10 - + while quotient != 0: current.next = Node(remainder) current = current.next @@ -62,7 +63,7 @@ def convert_to_list(number : int) -> Node: print("number must be positive!") -def convert_to_str(l : Node) -> str: +def convert_to_str(l: Node) -> str: """ converts the non-negative number list into a string. """ @@ -73,16 +74,18 @@ def convert_to_str(l : Node) -> str: return result -class Testsuite(unittest.TestCase): +class TestSuite(unittest.TestCase): """ testsuite for the linked list structure and the adding function, above. """ + def test_convert_to_str(self): number1 = Node(2) number1.next = Node(4) number1.next.next = Node(3) - self.assertEqual("243",convert_to_str(number1)) + self.assertEqual("243", convert_to_str(number1)) + def test_add_two_numbers(self): # 1. test case number1 = Node(2) @@ -91,9 +94,9 @@ def test_add_two_numbers(self): number2 = Node(5) number2.next = Node(6) number2.next.next = Node(4) - result = convert_to_str(add_two_numbers(number1,number2)) - self.assertEqual("708",result) - + result = convert_to_str(add_two_numbers(number1, number2)) + self.assertEqual("708", result) + # 2. test case number3 = Node(1) number3.next = Node(1) @@ -101,15 +104,15 @@ def test_add_two_numbers(self): number4 = Node(1) number4.next = Node(0) number4.next.next = Node(1) - result = convert_to_str(add_two_numbers(number3,number4)) - self.assertEqual("2101",result) - + result = convert_to_str(add_two_numbers(number3, number4)) + self.assertEqual("2101", result) + # 3. test case number5 = Node(1) number6 = Node(0) - result = convert_to_str(add_two_numbers(number5,number6)) - self.assertEqual("1",result) - + result = convert_to_str(add_two_numbers(number5, number6)) + self.assertEqual("1", result) + # 4. test case number7 = Node(9) number7.next = Node(1) @@ -117,13 +120,13 @@ def test_add_two_numbers(self): number8 = Node(1) number8.next = Node(0) number8.next.next = Node(1) - result = convert_to_str(add_two_numbers(number7,number8)) - self.assertEqual("022",result) + result = convert_to_str(add_two_numbers(number7, number8)) + self.assertEqual("022", result) + def test_convert_to_list(self): result = convert_to_str(convert_to_list(112)) - self.assertEqual("211",result) - + self.assertEqual("211", result) + if __name__ == "__main__": unittest.main() - diff --git a/linkedlist/delete_node.py b/linkedlist/delete_node.py index 4a78ccffb..302b52918 100644 --- a/linkedlist/delete_node.py +++ b/linkedlist/delete_node.py @@ -6,6 +6,13 @@ you are given the third node with value 3, the linked list should become 1 -> 2 -> 4 after calling your function. """ +import unittest + + +class Node: + def __init__(self, x): + self.val = x + self.next = None def delete_node(node): @@ -13,3 +20,44 @@ def delete_node(node): raise ValueError node.val = node.next.val node.next = node.next.next + + +class TestSuite(unittest.TestCase): + + def test_delete_node(self): + + # make linkedlist 1 -> 2 -> 3 -> 4 + head = Node(1) + curr = head + for i in range(2, 6): + curr.next = Node(i) + curr = curr.next + + # node3 = 3 + node3 = head.next.next + + # after delete_node => 1 -> 2 -> 4 + delete_node(node3) + + curr = head + self.assertEqual(1, curr.val) + + curr = curr.next + self.assertEqual(2, curr.val) + + curr = curr.next + self.assertEqual(4, curr.val) + + curr = curr.next + self.assertEqual(5, curr.val) + + tail = curr + self.assertIsNone(tail.next) + + self.assertRaises(ValueError, delete_node, tail) + self.assertRaises(ValueError, delete_node, tail.next) + + +if __name__ == '__main__': + + unittest.main() diff --git a/linkedlist/first_cyclic_node.py b/linkedlist/first_cyclic_node.py index 07c09b4f3..d1b229c32 100644 --- a/linkedlist/first_cyclic_node.py +++ b/linkedlist/first_cyclic_node.py @@ -6,9 +6,17 @@ Note: The solution is a direct implementation Floyd's cycle-finding algorithm (Floyd's Tortoise and Hare). """ +import unittest -def firstCyclicNode(head): +class Node: + + def __init__(self, x): + self.val = x + self.next = None + + +def first_cyclic_node(head): """ :type head: Node :rtype: Node @@ -27,3 +35,30 @@ def firstCyclicNode(head): while runner is not walker: runner, walker = runner.next, walker.next return runner + + +class TestSuite(unittest.TestCase): + + def test_first_cyclic_node(self): + + # create linkedlist => A -> B -> C -> D -> E -> C + head = Node('A') + head.next = Node('B') + curr = head.next + + cyclic_node = Node('C') + curr.next = cyclic_node + + curr = curr.next + curr.next = Node('D') + curr = curr.next + curr.next = Node('E') + curr = curr.next + curr.next = cyclic_node + + self.assertEqual('C', first_cyclic_node(head).val) + + +if __name__ == '__main__': + + unittest.main() diff --git a/linkedlist/intersection.py b/linkedlist/intersection.py index c2ee75417..6795145ee 100644 --- a/linkedlist/intersection.py +++ b/linkedlist/intersection.py @@ -1,15 +1,19 @@ +""" + This function takes two lists and returns the node they have in common, if any. + In this example: + 1 -> 3 -> 5 + \ + 7 -> 9 -> 11 + / + 2 -> 4 -> 6 + ...we would return 7. + Note that the node itself is the unique identifier, not the value of the node. + """ +import unittest + + def intersection(h1, h2): - """ - This function takes two lists and returns the node they have in common, if any. - In this example: - 1 -> 3 -> 5 - \ - 7 -> 9 -> 11 - / - 2 -> 4 -> 6 - ...we would return 7. - Note that the node itself is the unique identifier, not the value of the node. - """ + count = 0 flag = None h1_orig = h1 diff --git a/maths/next_bigger.py b/maths/next_bigger.py index f2dade279..e14e22cb8 100644 --- a/maths/next_bigger.py +++ b/maths/next_bigger.py @@ -5,10 +5,8 @@ Given a number, find the next higher number which has the exact same set of digits as the original number. For example: given 38276 return 38627. + given 99999 return -1. (no such number exists) -""" - -""" Condensed mathematical description: Find largest index i such that array[i − 1] < array[i]. @@ -21,18 +19,46 @@ Reverse the suffix starting at array[i]. """ +import unittest + def next_bigger(num): + digits = [int(i) for i in str(num)] idx = len(digits) - 1 + while idx >= 1 and digits[idx-1] >= digits[idx]: idx -= 1 + if idx == 0: - return -1 + return -1 # no such number exists + pivot = digits[idx-1] swap_idx = len(digits) - 1 + while pivot >= digits[swap_idx]: swap_idx -= 1 + digits[swap_idx], digits[idx-1] = digits[idx-1], digits[swap_idx] - digits[idx:] = digits[:idx-1:-1] # prefer slicing instead of reversed(digits[idx:]) - return int(''.join(str(x) for x in digits)) \ No newline at end of file + digits[idx:] = digits[:idx-1:-1] # prefer slicing instead of reversed(digits[idx:]) + + return int(''.join(str(x) for x in digits)) + + +class TestSuite(unittest.TestCase): + + def test_next_bigger(self): + + self.assertEqual(next_bigger(38276), 38627) + self.assertEqual(next_bigger(12345), 12354) + self.assertEqual(next_bigger(1528452), 1528524) + self.assertEqual(next_bigger(138654), 143568) + + self.assertEqual(next_bigger(54321), -1) + self.assertEqual(next_bigger(999), -1) + self.assertEqual(next_bigger(5), -1) + + +if __name__ == '__main__': + + unittest.main() diff --git a/tree/rbtree/rbtree.py b/tree/red_black_tree/red_black_tree.py similarity index 100% rename from tree/rbtree/rbtree.py rename to tree/red_black_tree/red_black_tree.py From f97363b8e6b2a596d7f04caa0a147953c324f8e8 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Thu, 5 Apr 2018 17:15:51 +0530 Subject: [PATCH 172/387] renamed is_sort.py -> is_sorted.py and add tests. --- README.md | 2 +- linkedlist/is_sort.py | 46 --------------------------------- linkedlist/is_sorted.py | 56 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 57 insertions(+), 47 deletions(-) delete mode 100644 linkedlist/is_sort.py create mode 100644 linkedlist/is_sorted.py diff --git a/README.md b/README.md index bb4bd494b..012eae2ec 100644 --- a/README.md +++ b/README.md @@ -111,7 +111,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [reverse](linkedlist/reverse.py) - [rotate_list](linkedlist/rotate_list.py) - [swap_in_pairs](linkedlist/swap_in_pairs.py) - - [is_sort](linkedlist/is_sort.py) + - [is_sorted](linkedlist/is_sorted.py) - [remove_range](linkedlist/remove_range.py) - [map](map) - [hashtable](map/hashtable.py) diff --git a/linkedlist/is_sort.py b/linkedlist/is_sort.py deleted file mode 100644 index 3c861c206..000000000 --- a/linkedlist/is_sort.py +++ /dev/null @@ -1,46 +0,0 @@ -""" -Given a linked list, is_sort function returns true if the list is in sorted -(increasing) order and return false otherwise. An empty list is considered -to be sorted. - -For example: -Null :List is sorted -1 2 3 4 :List is sorted -1 2 -1 3 :List is not sorted -""" - -class Node: - def __init__(self, x): - self.val = x - self.next = None - -def is_sort(head): - if not head: - return True - current = head - while current.next: - if current.val > current.next.val: - return False - current = current.next - return True - -if __name__ == "__main__": - n = Node(None) - # Test case: 1 2 3 4 : List is sorted - n = Node(1) - n.next = Node(2) - n.next.next = Node(3) - n.next.next.next = Node(4) - if is_sort(n) == True: - print("List is sorted\n") - else: - print("List is not sorted\n") - # Test case: 1 2 -1 3 : List is not sorted - n = Node(1) - n.next = Node(2) - n.next.next = Node(-1) - n.next.next.next = Node(3) - if is_sort(n) == True: - print("List is sorted\n") - else: - print("List is not sorted\n") diff --git a/linkedlist/is_sorted.py b/linkedlist/is_sorted.py new file mode 100644 index 000000000..501873983 --- /dev/null +++ b/linkedlist/is_sorted.py @@ -0,0 +1,56 @@ +""" +Given a linked list, is_sort function returns true if the list is in sorted +(increasing) order and return false otherwise. An empty list is considered +to be sorted. + +For example: +Null :List is sorted +1 2 3 4 :List is sorted +1 2 -1 3 :List is not sorted +""" +import unittest + + +class Node: + def __init__(self, x): + self.val = x + self.next = None + + +def is_sorted(head): + if not head: + return True + current = head + while current.next: + if current.val > current.next.val: + return False + current = current.next + return True + + +class TestSuite(unittest.TestCase): + + def test_is_sorted(self): + + head = Node(-2) + head.next = Node(2) + head.next.next = Node(2) + head.next.next.next = Node(4) + head.next.next.next.next = Node(9) + + # head -> -2 -> 2 -> 2 -> 4 -> 9 + self.assertTrue(is_sorted(head)) + + head = Node(1) + head.next = Node(2) + head.next.next = Node(8) + head.next.next.next = Node(4) + head.next.next.next.next = Node(6) + + # head -> 1 -> 2 -> 8 -> 4 -> 6 + self.assertFalse(is_sorted(head)) + + +if __name__ == "__main__": + + unittest.main() From 2f5951ea99ed7e722812232bb632336cc4ccc498 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Thu, 5 Apr 2018 17:28:21 +0530 Subject: [PATCH 173/387] more tests --- linkedlist/first_cyclic_node.py | 2 +- linkedlist/intersection.py | 98 +++++++++++++++++---------------- linkedlist/is_cyclic.py | 44 +++++++++++++++ 3 files changed, 96 insertions(+), 48 deletions(-) diff --git a/linkedlist/first_cyclic_node.py b/linkedlist/first_cyclic_node.py index d1b229c32..9ab7f88f7 100644 --- a/linkedlist/first_cyclic_node.py +++ b/linkedlist/first_cyclic_node.py @@ -41,7 +41,7 @@ class TestSuite(unittest.TestCase): def test_first_cyclic_node(self): - # create linkedlist => A -> B -> C -> D -> E -> C + # create linked list => A -> B -> C -> D -> E -> C head = Node('A') head.next = Node('B') curr = head.next diff --git a/linkedlist/intersection.py b/linkedlist/intersection.py index 6795145ee..71c4c1c61 100644 --- a/linkedlist/intersection.py +++ b/linkedlist/intersection.py @@ -12,86 +12,90 @@ import unittest +class Node(object): + def __init__(self, val=None): + self.val = val + self.next = None + + def intersection(h1, h2): count = 0 flag = None h1_orig = h1 h2_orig = h2 + while h1 or h2: count += 1 + if not flag and (h1.next is None or h2.next is None): # We hit the end of one of the lists, set a flag for this flag = (count, h1.next, h2.next) + if h1: h1 = h1.next if h2: h2 = h2.next - long_len = count # Mark the length of the longer of the two lists + + long_len = count # Mark the length of the longer of the two lists short_len = flag[0] + if flag[1] is None: shorter = h1_orig longer = h2_orig elif flag[2] is None: shorter = h2_orig longer = h1_orig + while longer and shorter: + while long_len > short_len: # force the longer of the two lists to "catch up" longer = longer.next long_len -= 1 + if longer == shorter: # The nodes match, return the node return longer else: longer = longer.next shorter = shorter.next + return None -class Node(object): - def __init__(self, val=None): - self.val = val - self.next = None - - -def test(): - def printLinkedList(head): - string = "" - while head.next: - string += head.val + " -> " - head = head.next - string += head.val - print(string) - - # 1 -> 3 -> 5 - # \ - # 7 -> 9 -> 11 - # / - # 2 -> 4 -> 6 - - a1 = Node("1") - b1 = Node("3") - c1 = Node("5") - d = Node("7") - a2 = Node("2") - b2 = Node("4") - c2 = Node("6") - e = Node("9") - f = Node("11") - - a1.next = b1 - b1.next = c1 - c1.next = d - a2.next = b2 - b2.next = c2 - c2.next = d - d.next = e - e.next = f - - printLinkedList(a1) - printLinkedList(a2) - print(intersection(a1, a2)) - assert intersection(a1, a2).val == d.val - -test() +class TestSuite(unittest.TestCase): + + def test_intersection(self): + + # create linked list as: + # 1 -> 3 -> 5 + # \ + # 7 -> 9 -> 11 + # / + # 2 -> 4 -> 6 + a1 = Node(1) + b1 = Node(3) + c1 = Node(5) + d = Node(7) + a2 = Node(2) + b2 = Node(4) + c2 = Node(6) + e = Node(9) + f = Node(11) + + a1.next = b1 + b1.next = c1 + c1.next = d + a2.next = b2 + b2.next = c2 + c2.next = d + d.next = e + e.next = f + + self.assertEqual(7, intersection(a1, a2).val) + + +if __name__ == '__main__': + + unittest.main() diff --git a/linkedlist/is_cyclic.py b/linkedlist/is_cyclic.py index e9be312c6..7b9bb94b5 100644 --- a/linkedlist/is_cyclic.py +++ b/linkedlist/is_cyclic.py @@ -4,6 +4,14 @@ Follow up: Can you solve it without using extra space? """ +import unittest + + +class Node: + + def __init__(self, x): + self.val = x + self.next = None def is_cyclic(head): @@ -21,3 +29,39 @@ def is_cyclic(head): if runner == walker: return True return False + + +class TestSuite(unittest.TestCase): + + def test_is_cyclic(self): + + # create linked list => A -> B -> C -> D -> E -> C + head = Node('A') + head.next = Node('B') + curr = head.next + + cyclic_node = Node('C') + curr.next = cyclic_node + + curr = curr.next + curr.next = Node('D') + curr = curr.next + curr.next = Node('E') + curr = curr.next + curr.next = cyclic_node + + self.assertTrue(is_cyclic(head)) + + # create linked list 1 -> 2 -> 3 -> 4 + head = Node(1) + curr = head + for i in range(2, 6): + curr.next = Node(i) + curr = curr.next + + self.assertFalse(is_cyclic(head)) + + +if __name__ == '__main__': + + unittest.main() From 08438309f7f1e61cbe87a0f07e8f0f9cdb8b7839 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Fri, 6 Apr 2018 20:50:51 +0200 Subject: [PATCH 174/387] made the calculation of the mid simpler. --- search/binary_search.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/search/binary_search.py b/search/binary_search.py index 71d24bab4..b47bae1cd 100644 --- a/search/binary_search.py +++ b/search/binary_search.py @@ -9,7 +9,7 @@ def binary_search(array, query): lo, hi = 0, len(array) - 1 while lo <= hi: - mid = lo + (hi - lo) // 2 + mid = (hi + lo) // 2 val = array[mid] if val == query: return mid From f374a74e32bcb3ee4e94987a96457f5a62e7fbcb Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Fri, 6 Apr 2018 21:48:29 +0200 Subject: [PATCH 175/387] simplefied the calculation of the mid. --- search/first_occurance.py | 2 +- search/last_occurance.py | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/search/first_occurance.py b/search/first_occurance.py index 3ac6eb025..63d77b808 100644 --- a/search/first_occurance.py +++ b/search/first_occurance.py @@ -8,7 +8,7 @@ def firstOccurance(array, query): lo, hi = 0, len(array) - 1 while lo <= hi: - mid = lo + (hi-lo) // 2 + mid = (hi + lo) // 2 print("lo: ", lo, " hi: ", hi, " mid: ", mid) if (mid == 0 and array[mid] == query) or \ (array[mid] == query and array[mid-1] < query): diff --git a/search/last_occurance.py b/search/last_occurance.py index 0c2c34095..e9b705d20 100644 --- a/search/last_occurance.py +++ b/search/last_occurance.py @@ -8,7 +8,7 @@ def lastOccurance(array, query): lo, hi = 0, len(array) - 1 while lo <= hi: - mid = lo + (hi - lo) // 2 + mid = (hi + lo) // 2 if (array[mid] == query and mid == len(array)-1) or \ (array[mid] == query and array[mid+1] > query): return mid From 35e74896ae9e706877f352900e1da61dd39e633f Mon Sep 17 00:00:00 2001 From: danghai Date: Thu, 5 Apr 2018 18:37:26 -0700 Subject: [PATCH 176/387] Add stutter.py to stack --- README.md | 1 + stack/stutter.py | 58 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 59 insertions(+) create mode 100644 stack/stutter.py diff --git a/README.md b/README.md index 012eae2ec..1e66b3b7c 100644 --- a/README.md +++ b/README.md @@ -175,6 +175,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [simplify_path](stack/simplify_path.py) - [stack](stack/stack.py) - [valid_parenthesis](stack/valid_parenthesis.py) + - [stutter](stack/stutter.py) - [strings](strings) - [add_binary](strings/add_binary.py) - [breaking_bad](strings/breaking_bad.py) diff --git a/stack/stutter.py b/stack/stutter.py new file mode 100644 index 000000000..3956d33a7 --- /dev/null +++ b/stack/stutter.py @@ -0,0 +1,58 @@ +""" +Given a stack, stutter takes a stack as a parameter and replaces every value +in the stack with two occurrences of that value. + +For example, suppose the stack stores these values: +bottom [3, 7, 1, 14, 9] top +Then the stack should store these values after the method terminates: +bottom [3, 3, 7, 7, 1, 1, 14, 14, 9, 9] top + +Note: There are 2 solutions: +first_stutter: it uses a single stack as auxiliary storage +second_stutter: it uses a single queue as auxiliary storage +""" +import unittest +import collections + +def first_stutter(stack): + storage_stack = [] + for i in range(len(stack)): + storage_stack.append(stack.pop()) + for i in range(len(storage_stack)): + val = storage_stack.pop() + stack.append(val) + stack.append(val) + + return stack + +def second_stutter(stack): + q = collections.deque() + # Put all values into queue from stack + for i in range(len(stack)): + q.append(stack.pop()) + # Put values back into stack from queue + for i in range(len(q)): + stack.append(q.pop()) + # Now, stack is reverse, put all values into queue from stack + for i in range(len(stack)): + q.append(stack.pop()) + # Put 2 times value into stack from queue + for i in range(len(q)): + val = q.pop() + stack.append(val) + stack.append(val) + + return stack +class TestSuite(unittest.TestCase): + """ + test suite for the function (above) + """ + def test_stutter(self): + # Test case: bottom [3, 7, 1, 14, 9] top + self.assertEqual([3, 3, 7, 7, 1, 1, 14, 14, 9, 9], + first_stutter([3, 7, 1, 14, 9])) + self.assertEqual([3, 3, 7, 7, 1, 1, 14, 14, 9, 9], + second_stutter([3, 7, 1, 14, 9])) + +if __name__ == "__main__": + unittest.main() From eaa9537ed35b33c26f23507687629cb2ca71fa8d Mon Sep 17 00:00:00 2001 From: danghai Date: Thu, 5 Apr 2018 19:19:58 -0700 Subject: [PATCH 177/387] Add switch_pairs.py to stack --- README.md | 1 + stack/switch_pairs.py | 84 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 85 insertions(+) create mode 100644 stack/switch_pairs.py diff --git a/README.md b/README.md index 1e66b3b7c..34ef4cc0f 100644 --- a/README.md +++ b/README.md @@ -176,6 +176,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [stack](stack/stack.py) - [valid_parenthesis](stack/valid_parenthesis.py) - [stutter](stack/stutter.py) + - [switch_pairs](stack/switch_pairs.py) - [strings](strings) - [add_binary](strings/add_binary.py) - [breaking_bad](strings/breaking_bad.py) diff --git a/stack/switch_pairs.py b/stack/switch_pairs.py new file mode 100644 index 000000000..97a9a51f1 --- /dev/null +++ b/stack/switch_pairs.py @@ -0,0 +1,84 @@ +""" +Given a stack, switch_pairs function takes a stack as a parameter and that +switches successive pairs of numbers starting at the bottom of the stack. + +For example, if the stack initially stores these values: +bottom [3, 8, 17, 9, 1, 10] top +Your function should switch the first pair (3, 8), the second pair (17, 9), ...: +bottom [8, 3, 9, 17, 10, 1] top + +if there are an odd number of values in the stack, the value at the top of the +stack is not moved: For example: +bottom [3, 8, 17, 9, 1] top +It would again switch pairs of values, but the value at the top of the stack (1) +would not be moved +bottom [8, 3, 9, 17, 1] top + +Note: There are 2 solutions: +first_switch_pairs: it uses a single stack as auxiliary storage +second_switch_pairs: it uses a single queue as auxiliary storage +""" +import unittest +import collections + +def first_switch_pairs(stack): + storage_stack = [] + for i in range(len(stack)): + storage_stack.append(stack.pop()) + for i in range(len(storage_stack)): + if len(storage_stack) == 0: + break + first = storage_stack.pop() + if len(storage_stack) == 0: # case: odd number of values in stack + stack.append(first) + break + second = storage_stack.pop() + stack.append(second) + stack.append(first) + return stack + +def second_switch_pairs(stack): + q = collections.deque() + # Put all values into queue from stack + for i in range(len(stack)): + q.append(stack.pop()) + # Put values back into stack from queue + for i in range(len(q)): + stack.append(q.pop()) + # Now, stack is reverse, put all values into queue from stack + for i in range(len(stack)): + q.append(stack.pop()) + # Swap pairs by appending the 2nd value before appending 1st value + for i in range(len(q)): + if len(q) == 0: + break + first = q.pop() + if len(q) == 0: # case: odd number of values in stack + stack.append(first) + break + second = q.pop() + stack.append(second) + stack.append(first) + + return stack + +class TestSuite(unittest.TestCase): + """ + test suite for the function (above) + """ + def test_switch_pairs(self): + # Test case: even number of values in stack + # bottom [3, 8, 17, 9, 1, 10] top + self.assertEqual([8, 3, 9, 17, 10, 1], + first_switch_pairs([3, 8, 17, 9, 1, 10])) + self.assertEqual([8, 3, 9, 17, 10, 1], + second_switch_pairs([3, 8, 17, 9, 1, 10])) + # Test case: odd number of values in stack + # bottom [3, 8, 17, 9, 1] top + self.assertEqual([8, 3, 9, 17, 1], + first_switch_pairs([3, 8, 17, 9, 1])) + self.assertEqual([8, 3, 9, 17, 1], + second_switch_pairs([3, 8, 17, 9, 1])) + +if __name__ == "__main__": + unittest.main() From 0a74331d6e38c746e43df7e264cc742aca987ee4 Mon Sep 17 00:00:00 2001 From: danghai Date: Thu, 5 Apr 2018 20:02:15 -0700 Subject: [PATCH 178/387] Add is_consecutive.py to stack --- README.md | 1 + stack/is_consecutive.py | 75 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 76 insertions(+) create mode 100644 stack/is_consecutive.py diff --git a/README.md b/README.md index 34ef4cc0f..9160cac96 100644 --- a/README.md +++ b/README.md @@ -177,6 +177,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [valid_parenthesis](stack/valid_parenthesis.py) - [stutter](stack/stutter.py) - [switch_pairs](stack/switch_pairs.py) + - [is_consecutive](stack/is_consecutive.py) - [strings](strings) - [add_binary](strings/add_binary.py) - [breaking_bad](strings/breaking_bad.py) diff --git a/stack/is_consecutive.py b/stack/is_consecutive.py new file mode 100644 index 000000000..6964d4fc9 --- /dev/null +++ b/stack/is_consecutive.py @@ -0,0 +1,75 @@ +""" +Given a stack, a function is_consecutive takes a stack as a parameter and that +returns whether or not the stack contains a sequence of consecutive integers +starting from the bottom of the stack (returning true if it does, returning +false if it does not). + +For example: +bottom [3, 4, 5, 6, 7] top +Then the call of is_consecutive(s) should return true. +bottom [3, 4, 6, 7] top +Then the call of is_consecutive(s) should return false. +bottom [3, 2, 1] top +The function should return false due to reverse order. + +Note: There are 2 solutions: +first_is_consecutive: it uses a single stack as auxiliary storage +second_is_consecutive: it uses a single queue as auxiliary storage +""" +import unittest +import collections + +def first_is_consecutive(stack): + storage_stack = [] + for i in range(len(stack)): + first_value = stack.pop() + if len(stack) == 0: # Case odd number of values in stack + return True + second_value = stack.pop() + if first_value - second_value != 1: # Not consecutive + return False + stack.append(second_value) # Backup second value + storage_stack.append(first_value) + + # Back up stack from storage stack + for i in range(len(storage_stack)): + stack.append(storage_stack.pop()) + return True + +def second_is_consecutive(stack): + q = collections.deque() + for i in range(len(stack)): + first_value = stack.pop() + if len(stack) == 0: # Case odd number of values in stack + return True + second_value = stack.pop() + if first_value - second_value != 1: # Not consecutive + return False + stack.append(second_value) # Backup second value + q.append(first_value) + + # Back up stack from queue + for i in range(len(q)): + stack.append(q.pop()) + for i in range(len(stack)): + q.append(stack.pop()) + for i in range(len(q)): + stack.append(q.pop()) + + return True + +class TestSuite(unittest.TestCase): + """ + test suite for the function (above) + """ + def test_is_consecutive(self): + self.assertTrue(first_is_consecutive([3, 4, 5, 6, 7])) + self.assertFalse(first_is_consecutive([3, 4, 6, 7])) + self.assertFalse(first_is_consecutive([3, 2, 1])) + + self.assertTrue(second_is_consecutive([3, 4, 5, 6, 7])) + self.assertFalse(second_is_consecutive([3, 4, 6, 7])) + self.assertFalse(second_is_consecutive([3, 2, 1])) + +if __name__ == "__main__": + unittest.main() From c28dc4beeaa5fb346bb700a0ea912a12b1f3e7bd Mon Sep 17 00:00:00 2001 From: danghai Date: Fri, 6 Apr 2018 16:39:11 -0700 Subject: [PATCH 179/387] Add remove_min.py to stack --- README.md | 1 + stack/remove_min.py | 43 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 44 insertions(+) create mode 100644 stack/remove_min.py diff --git a/README.md b/README.md index 9160cac96..90027a47a 100644 --- a/README.md +++ b/README.md @@ -178,6 +178,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [stutter](stack/stutter.py) - [switch_pairs](stack/switch_pairs.py) - [is_consecutive](stack/is_consecutive.py) + - [remove_min](stack/remove_min.py) - [strings](strings) - [add_binary](strings/add_binary.py) - [breaking_bad](strings/breaking_bad.py) diff --git a/stack/remove_min.py b/stack/remove_min.py new file mode 100644 index 000000000..04260203c --- /dev/null +++ b/stack/remove_min.py @@ -0,0 +1,43 @@ +""" +Given a stack, a function remove_min accepts a stack as a parameter +and removes the smallest value from the stack. + +For example: +bottom [2, 8, 3, -6, 7, 3] top +After remove_min(stack): +bottom [2, 8, 3, 7, 3] top + +""" +import unittest + +def remove_min(stack): + storage_stack = [] + if len(stack) == 0: # Stack is empty + return stack + # Find the smallest value + min = stack.pop() + stack.append(min) + for i in range(len(stack)): + val = stack.pop() + if val <= min: + min = val + storage_stack.append(val) + # Back up stack and remove min value + for i in range(len(storage_stack)): + val = storage_stack.pop() + if val != min: + stack.append(val) + return stack + +class TestSuite(unittest.TestCase): + """ + test suite for the function (above) + """ + def test_stutter(self): + # Test case: bottom [2, 8, 3, -6, 7, 3] top + self.assertEqual([2, 8, 3, 7, 3], remove_min([2, 8, 3, -6, 7, 3])) + # Test case: 2 smallest value [2, 8, 3, 7, 3] + self.assertEqual([4, 8, 7], remove_min([4, 8, 3, 7, 3])) + +if __name__ == "__main__": + unittest.main() From de2ee0f29d36d69a7e34eb9c5e30515f9a852dd2 Mon Sep 17 00:00:00 2001 From: danghai Date: Fri, 6 Apr 2018 17:07:55 -0700 Subject: [PATCH 180/387] Add is_sorted to stack --- README.md | 1 + stack/is_sorted.py | 44 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) create mode 100644 stack/is_sorted.py diff --git a/README.md b/README.md index 90027a47a..c3bce834d 100644 --- a/README.md +++ b/README.md @@ -179,6 +179,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [switch_pairs](stack/switch_pairs.py) - [is_consecutive](stack/is_consecutive.py) - [remove_min](stack/remove_min.py) + - [is_sorted](stack/is_sorted.py) - [strings](strings) - [add_binary](strings/add_binary.py) - [breaking_bad](strings/breaking_bad.py) diff --git a/stack/is_sorted.py b/stack/is_sorted.py new file mode 100644 index 000000000..9ff30f1ff --- /dev/null +++ b/stack/is_sorted.py @@ -0,0 +1,44 @@ +""" +Given a stack, a function is_sorted accepts a stack as a parameter and returns +true if the elements in the stack occur in ascending increasing order from +bottom, and false otherwise. That is, the smallest element should be at bottom + +For example: +bottom [6, 3, 5, 1, 2, 4] top +The function should return false +bottom [1, 2, 3, 4, 5, 6] top +The function should return true +""" +import unittest + +def is_sorted(stack): + storage_stack = [] + for i in range(len(stack)): + if len(stack) == 0: + return True + first_val = stack.pop() + if len(stack) == 0: + return True + second_val = stack.pop() + if first_val < second_val: + return False + storage_stack.append(first_val) + storage_stack.append(second_val) + + # Backup stack + for i in range(len(storage_stack)): + stack.append(storage_stack.pop()) + + return True + +class TestSuite(unittest.TestCase): + """ + test suite for the function (above) + """ + def test_stutter(self): + # Test case: bottom [6, 3, 5, 1, 2, 4] top + self.assertFalse(is_sorted([6, 3, 5, 1, 2, 4])) + self.assertTrue(is_sorted([1, 2, 3, 4, 5, 6])) + +if __name__ == "__main__": + unittest.main() From d6872120028231431b02c0fbc1a70ba69d90e522 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sat, 7 Apr 2018 18:35:30 +0200 Subject: [PATCH 181/387] Added a test suite and change the division operator from / to //. --- dfs/all_factors.py | 68 +++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 61 insertions(+), 7 deletions(-) diff --git a/dfs/all_factors.py b/dfs/all_factors.py index fbed6edb9..6c692f30b 100644 --- a/dfs/all_factors.py +++ b/dfs/all_factors.py @@ -27,10 +27,32 @@ [2, 2, 2, 4], [2, 2, 2, 2, 2], """ - +import unittest def get_factors(n): + """[summary] + + Arguments: + n {[int]} -- [to analysed number] + + Returns: + [list of lists] -- [all factors of the number n] + """ + def factor(n, i, combi, res): + """[summary] + helper function + + Arguments: + n {[int]} -- [number] + i {[int]} -- [to tested divisor] + combi {[list]} -- [catch divisors] + res {[list]} -- [all factors of the number n] + + Returns: + [list] -- [res] + """ + while i * i <= n: if n % i == 0: res += combi + [i, int(n/i)], @@ -40,22 +62,44 @@ def factor(n, i, combi, res): return factor(n, 2, [], []) -def get_factors_iterative1(self, n): +def get_factors_iterative1(n): + """[summary] + Computes all factors of n. + Translated the function get_factors(...) in + a call-stack modell. + + Arguments: + n {[int]} -- [to analysed number] + + Returns: + [list of lists] -- [all factors] + """ + todo, res = [(n, 2, [])], [] while todo: n, i, combi = todo.pop() while i * i <= n: if n % i == 0: - res += combi + [i, n/i], - todo += (n/i, i, combi+[i]), + res += combi + [i, n//i], + todo.append((n//i, i, combi+[i])), i += 1 return res def get_factors_iterative2(n): + """[summary] + analog as above + + Arguments: + n {[int]} -- [description] + + Returns: + [list of lists] -- [all factors of n] + """ + ans, stack, x = [], [], 2 while True: - if x > n / x: + if x > n // x: if not stack: return ans ans.append(stack + [n]) @@ -64,10 +108,20 @@ def get_factors_iterative2(n): x += 1 elif n % x == 0: stack.append(x) - n /= x + n //= x else: x += 1 +class TestAllFactors(unittest.TestCase): + def test_get_factors(self): + self.assertEqual([[2, 16], [2, 2, 8], [2, 2, 2, 4], [2, 2, 2, 2, 2], [2, 4, 4], [4, 8]], + get_factors(32)) + def test_get_factors_iterative1(self): + self.assertEqual([[2, 16], [4, 8], [2, 2, 8], [2, 4, 4], [2, 2, 2, 4], [2, 2, 2, 2, 2]], + get_factors_iterative1(32)) + def test_get_factors_iterative2(self): + self.assertEqual([[2, 2, 2, 2, 2], [2, 2, 2, 4], [2, 2, 8], [2, 4, 4], [2, 16], [4, 8]], + get_factors_iterative2(32)) if __name__ == "__main__": - print(get_factors(32)) + unittest.main() From 2e15a6b75cf84f4ffdd560ad03a98df39f0b92d4 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sat, 7 Apr 2018 19:46:29 +0200 Subject: [PATCH 182/387] added a class-framework and a toString() method. At the end of the file a simple test case. --- dfs/sudoku_solver.py | 129 ++++++++++++++++++++++++++----------------- 1 file changed, 78 insertions(+), 51 deletions(-) diff --git a/dfs/sudoku_solver.py b/dfs/sudoku_solver.py index a6c1a3208..2248dadfa 100644 --- a/dfs/sudoku_solver.py +++ b/dfs/sudoku_solver.py @@ -21,59 +21,86 @@ for the board lol). """ -def solveSudoku(self, board): - self.board = board - self.val = self.PossibleVals() - self.Solver() +try: + xrange +except: + xrange = range -def PossibleVals(self): - a = "123456789" - d, val = {}, {} - for i in xrange(9): - for j in xrange(9): - ele = self.board[i][j] - if ele != ".": - d[("r", i)] = d.get(("r", i), []) + [ele] - d[("c", j)] = d.get(("c", j), []) + [ele] - d[(i//3, j//3)] = d.get((i//3, j//3), []) + [ele] - else: - val[(i,j)] = [] - for (i,j) in val.keys(): - inval = d.get(("r",i),[])+d.get(("c",j),[])+d.get((i/3,j/3),[]) - val[(i,j)] = [n for n in a if n not in inval ] - return val +class Sudoku: + def __init__ (self, board,row,col): + self.board = board + self.row = row + self.col = col + self.val = self.PossibleVals() + self.Solver() + + def PossibleVals(self): + a = "123456789" + d, val = {}, {} + for i in xrange(self.row): + for j in xrange(self.col): + ele = self.board[i][j] + if ele != ".": + d[("r", i)] = d.get(("r", i), []) + [ele] + d[("c", j)] = d.get(("c", j), []) + [ele] + d[(i//3, j//3)] = d.get((i//3, j//3), []) + [ele] + else: + val[(i,j)] = [] + for (i,j) in val.keys(): + inval = d.get(("r",i),[])+d.get(("c",j),[])+d.get((i/3,j/3),[]) + val[(i,j)] = [n for n in a if n not in inval ] + return val -def Solver(self): - if len(self.val)==0: + def Solver(self): + if len(self.val)==0: + return True + kee = min(self.val.keys(), key=lambda x: len(self.val[x])) + nums = self.val[kee] + for n in nums: + update = {kee:self.val[kee]} + if self.ValidOne(n, kee, update): # valid choice + if self.Solver(): # keep solving + return True + self.undo(kee, update) # invalid choice or didn't solve it => undo + return False + + def ValidOne(self, n, kee, update): + self.board[kee[0]][kee[1]] = n + del self.val[kee] + i, j = kee + for ind in self.val.keys(): + if n in self.val[ind]: + if ind[0]==i or ind[1]==j or (ind[0]/3,ind[1]/3)==(i/3,j/3): + update[ind] = n + self.val[ind].remove(n) + if len(self.val[ind])==0: + return False return True - kee = min(self.val.keys(), key=lambda x: len(self.val[x])) - nums = self.val[kee] - for n in nums: - update = {kee:self.val[kee]} - if self.ValidOne(n, kee, update): # valid choice - if self.Solver(): # keep solving - return True - self.undo(kee, update) # invalid choice or didn't solve it => undo - return False -def ValidOne(self, n, kee, update): - self.board[kee[0]][kee[1]] = n - del self.val[kee] - i, j = kee - for ind in self.val.keys(): - if n in self.val[ind]: - if ind[0]==i or ind[1]==j or (ind[0]/3,ind[1]/3)==(i/3,j/3): - update[ind] = n - self.val[ind].remove(n) - if len(self.val[ind])==0: - return False - return True + def undo(self, kee, update): + self.board[kee[0]][kee[1]]="." + for k in update: + if k not in self.val: + self.val[k]= update[k] + else: + self.val[k].append(update[k]) + return None + + def __str__(self): + """[summary] + Generates a board representation as string. + + Returns: + [str] -- [board representation] + """ + + resp = "" + for i in range(self.row): + for j in range(self.col): + resp += " {0} ".format(board[i][j]) + resp += "\n" + return resp -def undo(self, kee, update): - self.board[kee[0]][kee[1]]="." - for k in update: - if k not in self.val: - self.val[k]= update[k] - else: - self.val[k].append(update[k]) - return None +board = [["5","3","."], ["6",".", "."],[".","9","8"]] +testObj = Sudoku(board,3,3) +print(testObj) \ No newline at end of file From 94c1d2876085be42ae6cc43f30df80a27aa49998 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sat, 7 Apr 2018 20:05:27 +0200 Subject: [PATCH 183/387] renamed the methods --- dfs/sudoku_solver.py | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/dfs/sudoku_solver.py b/dfs/sudoku_solver.py index 2248dadfa..a4079be21 100644 --- a/dfs/sudoku_solver.py +++ b/dfs/sudoku_solver.py @@ -31,10 +31,9 @@ def __init__ (self, board,row,col): self.board = board self.row = row self.col = col - self.val = self.PossibleVals() - self.Solver() + self.val = self.possible_values() - def PossibleVals(self): + def possible_values(self): a = "123456789" d, val = {}, {} for i in xrange(self.row): @@ -51,20 +50,20 @@ def PossibleVals(self): val[(i,j)] = [n for n in a if n not in inval ] return val - def Solver(self): + def solve(self): if len(self.val)==0: return True kee = min(self.val.keys(), key=lambda x: len(self.val[x])) nums = self.val[kee] for n in nums: update = {kee:self.val[kee]} - if self.ValidOne(n, kee, update): # valid choice - if self.Solver(): # keep solving + if self.valid_one(n, kee, update): # valid choice + if self.solve(): # keep solving return True self.undo(kee, update) # invalid choice or didn't solve it => undo return False - def ValidOne(self, n, kee, update): + def valid_one(self, n, kee, update): self.board[kee[0]][kee[1]] = n del self.val[kee] i, j = kee @@ -101,6 +100,9 @@ def __str__(self): resp += "\n" return resp +# simple test case board = [["5","3","."], ["6",".", "."],[".","9","8"]] testObj = Sudoku(board,3,3) +print(testObj) +testObj.solve() print(testObj) \ No newline at end of file From eb2cdac4e6b66cdbaf76f19e3f8d22544881e877 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sat, 7 Apr 2018 20:13:07 +0200 Subject: [PATCH 184/387] added a simple tes case , main() method --- dfs/sudoku_solver.py | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) diff --git a/dfs/sudoku_solver.py b/dfs/sudoku_solver.py index a4079be21..df2f0fac0 100644 --- a/dfs/sudoku_solver.py +++ b/dfs/sudoku_solver.py @@ -96,13 +96,20 @@ def __str__(self): resp = "" for i in range(self.row): for j in range(self.col): - resp += " {0} ".format(board[i][j]) + resp += " {0} ".format(self.board[i][j]) resp += "\n" return resp -# simple test case -board = [["5","3","."], ["6",".", "."],[".","9","8"]] -testObj = Sudoku(board,3,3) -print(testObj) -testObj.solve() -print(testObj) \ No newline at end of file +def main(): + """[summary] + simple test case + """ + + board = [["5","3","."], ["6",".", "."],[".","9","8"]] + testObj = Sudoku(board,3,3) + print(testObj) + testObj.solve() + print(testObj) + +if __name__ == "__main__": + main() \ No newline at end of file From 3ac45f0abeaf3bec98741d5ade7a8ede65476ac6 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sat, 7 Apr 2018 23:25:12 +0200 Subject: [PATCH 185/387] added test suite (unittest) --- dfs/sudoku_solver.py | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/dfs/sudoku_solver.py b/dfs/sudoku_solver.py index df2f0fac0..850f8ae51 100644 --- a/dfs/sudoku_solver.py +++ b/dfs/sudoku_solver.py @@ -21,6 +21,8 @@ for the board lol). """ +import unittest + try: xrange except: @@ -100,16 +102,14 @@ def __str__(self): resp += "\n" return resp -def main(): - """[summary] - simple test case - """ - board = [["5","3","."], ["6",".", "."],[".","9","8"]] - testObj = Sudoku(board,3,3) - print(testObj) - testObj.solve() - print(testObj) +class TestSudoku(unittest.TestCase): + def test_sudoku_solver(self): + board = [["5","3","."], ["6",".", "."],[".","9","8"]] + test_obj = Sudoku(board, 3, 3) + test_obj.solve() + self.assertEqual([['5', '3', '1'], ['6', '1', '2'], ['1', '9', '8']],test_obj.board) + if __name__ == "__main__": - main() \ No newline at end of file + unittest.main() \ No newline at end of file From 5d14ddf59082cb278cba1f85c142712879a11454 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sat, 7 Apr 2018 23:26:17 +0200 Subject: [PATCH 186/387] changed style --- dfs/sudoku_solver.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/dfs/sudoku_solver.py b/dfs/sudoku_solver.py index 850f8ae51..d28d709d8 100644 --- a/dfs/sudoku_solver.py +++ b/dfs/sudoku_solver.py @@ -29,7 +29,7 @@ xrange = range class Sudoku: - def __init__ (self, board,row,col): + def __init__ (self, board, row, col): self.board = board self.row = row self.col = col From 524e2a60ef382c871335f46167d84c90dc196fd0 Mon Sep 17 00:00:00 2001 From: danghai Date: Sun, 8 Apr 2018 02:27:09 -0700 Subject: [PATCH 187/387] Add unittest to sort --- sort/bubble_sort.py | 19 ++++++++++++------- sort/comb_sort.py | 20 ++++++++++++-------- sort/counting_sort.py | 31 +++++++++++++++++-------------- sort/heap_sort.py | 36 +++++++++++++++++------------------- sort/insertion_sort.py | 11 +++++++++++ sort/merge_sort.py | 13 ++++++++++--- sort/quick_sort.py | 19 ++++++++++++------- sort/selection_sort.py | 11 ++++++++++- 8 files changed, 101 insertions(+), 59 deletions(-) diff --git a/sort/bubble_sort.py b/sort/bubble_sort.py index 9b5e23ee9..176217ac7 100644 --- a/sort/bubble_sort.py +++ b/sort/bubble_sort.py @@ -5,7 +5,7 @@ Worst-case performance: O(N^2) """ - +import unittest def bubble_sort(arr): @@ -20,9 +20,14 @@ def swap(i, j): if arr[i - 1] > arr[i]: swap(i - 1, i) swapped = True - -array = [1, 5, 65, 23, 57, 1232, -1, -5, -2, 242, 100, - 4, 423, 2, 564, 9, 0, 10, 43, 64, 32, 1, 999] -print(array) -bubble_sort(array) -print(array) + return arr + +class TestSuite(unittest.TestCase): + """ + test suite for the function (above) + """ + def test_bubble_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + bubble_sort([1, 5, 65, 23, 57, 1232])) +if __name__ == "__main__": + unittest.main() diff --git a/sort/comb_sort.py b/sort/comb_sort.py index b9dc1f67a..0b066ce0b 100644 --- a/sort/comb_sort.py +++ b/sort/comb_sort.py @@ -5,7 +5,7 @@ Worst-case performance: O(N^2) """ - +import unittest from math import floor @@ -32,10 +32,14 @@ def swap(i, j): swap(i, i + gap) sorted = False i = i + 1 - - -array = [1, 5, 65, 23, 57, 1232, -1, -5, -2, 242, 100, - 4, 423, 2, 564, 9, 0, 10, 43, 64, 32, 1, 999] -print(array) -comb_sort(array) -print(array) + return arr + +class TestSuite(unittest.TestCase): + """ + test suite for the function (above) + """ + def test_comb_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + comb_sort([1, 5, 65, 23, 57, 1232])) +if __name__ == "__main__": + unittest.main() diff --git a/sort/counting_sort.py b/sort/counting_sort.py index d43bdffbe..6228e6f3c 100644 --- a/sort/counting_sort.py +++ b/sort/counting_sort.py @@ -1,14 +1,15 @@ +import unittest def counting_sort(arr): """ Counting_sort Sorting a array which has no element greater than k Creating a new temp_arr,where temp_arr[i] contain the number of - element less than or equal to i in the arr + element less than or equal to i in the arr Then placing the number i into a correct position in the result_arr return the result_arr Complexity: 0(n) """ - + m = min(arr) #in case there are negative elements, change the array to all positive element different = 0 @@ -22,25 +23,27 @@ def counting_sort(arr): for i in range(0,len(arr)): temp_arr[arr[i]] = temp_arr[arr[i]]+1 #temp_array[i] contain the times the number i appear in arr - + for i in range(1, k+1): temp_arr[i] = temp_arr[i] + temp_arr[i-1] #temp_array[i] contain the number of element less than or equal i in arr - + result_arr = [0]*len(arr) #creating a result_arr an put the element in a correct positon for i in range(len(arr)-1,-1,-1): result_arr[temp_arr[arr[i]]-1] = arr[i]-different temp_arr[arr[i]] = temp_arr[arr[i]]-1 - - return result_arr + return result_arr + +class TestSuite(unittest.TestCase): + """ + test suite for the function (above) + """ + def test_counting_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + counting_sort([1, 5, 65, 23, 57, 1232])) + self.assertEqual([-1232, -65, -57, -23, -5, -1], + counting_sort([-1, -5, -65, -23, -57, -1232])) if __name__ == "__main__": - positive_array = [1,2,3,4,9,1,2,8,3,5,7,0,9,8,1,7,4,5] - negative_array = [-5,-6,-2,-3,-4,-5,0,-9,-2,-3,-8,-4] - x = counting_sort(positive_array) - y = counting_sort(negative_array) - print(x) - print(y) - - + unittest.main() diff --git a/sort/heap_sort.py b/sort/heap_sort.py index 348964bc7..a069511c0 100644 --- a/sort/heap_sort.py +++ b/sort/heap_sort.py @@ -1,15 +1,16 @@ +import unittest def max_heap_sort(arr): """ Heap Sort that uses a max heap to sort an array in ascending order Complexity: O(n log(n)) """ for i in range(len(arr)-1,0,-1): max_heapify(arr, i) - + temp = arr[0] arr[0] = arr[i] arr[i] = temp + return arr - def max_heapify(arr, end): """ Max heapify helper for max_heap_sort """ @@ -36,7 +37,7 @@ def max_heapify(arr, end): # If no swap occured, no need to keep iterating else: break - + def min_heap_sort(arr): """ Heap Sort that uses a min heap to sort an array in ascending order @@ -44,7 +45,7 @@ def min_heap_sort(arr): """ for i in range(0, len(arr)-1): min_heapify(arr, i) - + return arr def min_heapify(arr, start): """ Min heapify helper for min_heap_sort @@ -76,18 +77,15 @@ def min_heapify(arr, start): else: break -if __name__ == '__main__': - import timeit - - array = [1,5,65,23,57,1232,-1,-5,-2,242,100,4,423,2,564,9,0,10,43,64] - print("array:") - print(array) - print("Max Heapify:") - max_heap_sort(array) - print(array) - array = [1,5,65,23,57,1232,-1,-5,-2,242,100,4,423,2,564,9,0,10,43,64] - print("Min Heapify:") - min_heap_sort(array) - print(array) - print("Max Heapify Time:", timeit.timeit('max_heap_sort(array)', setup="from __main__ import max_heap_sort, array",number=10000)) - print("Min Heapify Time:", timeit.timeit('min_heap_sort(array)', setup="from __main__ import min_heap_sort, array",number=10000)) +class TestSuite(unittest.TestCase): + """ + test suite for the function (above) + """ + def test_max_heap_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + max_heap_sort([1, 5, 65, 23, 57, 1232])) + def test_min_heap_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + min_heap_sort([1, 5, 65, 23, 57, 1232])) +if __name__ == "__main__": + unittest.main() diff --git a/sort/insertion_sort.py b/sort/insertion_sort.py index 99bd2058c..0e8080290 100644 --- a/sort/insertion_sort.py +++ b/sort/insertion_sort.py @@ -1,3 +1,4 @@ +import unittest def insertion_sort(arr): """ Insertion Sort Complexity: O(n^2) @@ -12,3 +13,13 @@ def insertion_sort(arr): # Break and do the final swap arr[pos] = cursor return arr + +class TestSuite(unittest.TestCase): + """ + test suite for the function (above) + """ + def test_insertion_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + insertion_sort([1, 5, 65, 23, 57, 1232])) +if __name__ == "__main__": + unittest.main() diff --git a/sort/merge_sort.py b/sort/merge_sort.py index e2f2d2a27..ab985b921 100644 --- a/sort/merge_sort.py +++ b/sort/merge_sort.py @@ -1,3 +1,4 @@ +import unittest def merge_sort(arr): """ Merge Sort Complexity: O(n log(n)) @@ -35,6 +36,12 @@ def merge(left, right): # Return result return arr -array = [1,5, 7,4,3,2,1,9,0,10,43,64] -print(array) -print(merge_sort(array)) +class TestSuite(unittest.TestCase): + """ + test suite for the function (above) + """ + def test_merge_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + merge_sort([1, 5, 65, 23, 57, 1232])) +if __name__ == "__main__": + unittest.main() diff --git a/sort/quick_sort.py b/sort/quick_sort.py index 2fd38e10d..9d48b2f40 100644 --- a/sort/quick_sort.py +++ b/sort/quick_sort.py @@ -1,14 +1,14 @@ +import unittest def quick_sort(arr, first, last): """ Quicksort Complexity: best O(n) avg O(n log(n)), worst O(N^2) """ if first < last: pos = partition(arr, first, last) - print(arr[first:pos-1], arr[pos+1:last]) # Start our two recursive calls quick_sort(arr, first, pos-1) quick_sort(arr, pos+1, last) - + return arr def partition(arr, first, last): wall = first for pos in range(first, last): @@ -16,10 +16,15 @@ def partition(arr, first, last): arr[pos], arr[wall] = arr[wall], arr[pos] wall += 1 arr[wall], arr[last] = arr[last], arr[wall] - print(wall) return wall -array = [1,5,65,23,57,1232,-1,-5,-2,242,100,4,423,2,564,9,0,10,43,64] -print(array) -quick_sort(array, 0, len(array)-1) -print(array) +class TestSuite(unittest.TestCase): + """ + test suite for the function (above) + """ + def test_quick_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + quick_sort([1, 5, 65, 23, 57, 1232], 0, 5)) + +if __name__ == "__main__": + unittest.main() diff --git a/sort/selection_sort.py b/sort/selection_sort.py index acb0e30da..2e9cb03fc 100644 --- a/sort/selection_sort.py +++ b/sort/selection_sort.py @@ -1,4 +1,4 @@ - +import unittest def selection_sort(arr): """ Selection Sort Complexity: O(n^2) @@ -13,4 +13,13 @@ def selection_sort(arr): arr[minimum], arr[i] = arr[i], arr[minimum] return arr +class TestSuite(unittest.TestCase): + """ + test suite for the function (above) + """ + def test_selection_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + selection_sort([1, 5, 65, 23, 57, 1232])) +if __name__ == "__main__": + unittest.main() From 66bd429fb0f01f196e8ddfb9af053b834a973b7a Mon Sep 17 00:00:00 2001 From: danghai Date: Sat, 7 Apr 2018 19:57:26 -0700 Subject: [PATCH 188/387] Implement binary heap --- README.md | 1 + heap/binary_heap.py | 150 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 151 insertions(+) create mode 100644 heap/binary_heap.py diff --git a/README.md b/README.md index c3bce834d..3796074c2 100644 --- a/README.md +++ b/README.md @@ -98,6 +98,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [merge_sorted_k_lists](heap/merge_sorted_k_lists.py) - [skyline](heap/skyline.py) - [sliding_window_max](heap/sliding_window_max.py) + - [binary_heap](heap/binary_heap.py) - [linkedlist](linkedlist) - [add_two_numbers](linkedlist/add_two_numbers.py) - [copy_random_pointer](linkedlist/copy_random_pointer.py) diff --git a/heap/binary_heap.py b/heap/binary_heap.py new file mode 100644 index 000000000..fc2f36a14 --- /dev/null +++ b/heap/binary_heap.py @@ -0,0 +1,150 @@ +""" +Binary Heap. A min heap is a complete binary tree where each node is smaller +its childen. The root, therefore, is the minimum element in the tree. The min +heap use array to represent the data and operation. For example a min heap: + + 4 + / \ + 50 7 + / \ / +55 90 87 + +Heap [0, 4, 50, 7, 55, 90, 87] + +Method in class: insert, remove_min +For example insert(2) in a min heap: + + 4 4 2 + / \ / \ / \ + 50 7 --> 50 2 --> 50 4 + / \ / \ / \ / \ / \ / \ +55 90 87 2 55 90 87 7 55 90 87 7 + +For example remove_min() in a min heap: + + 4 87 7 + / \ / \ / \ + 50 7 --> 50 7 --> 50 87 + / \ / / \ / \ +55 90 87 55 90 55 90 + +""" +import unittest +from abc import ABCMeta, abstractmethod + +class AbstractHeap(metaclass=ABCMeta): + """Abstract Class for Binary Heap.""" + def __init__(self): + pass + @abstractmethod + def perc_up(self, i): + pass + @abstractmethod + def insert(self, val): + pass + @abstractmethod + def perc_down(self,i): + pass + @abstractmethod + def min_child(self,i): + pass + @abstractmethod + def remove_min(self,i): + pass +class Binary_Heap(AbstractHeap): + def __init__(self): + self.currentSize = 0 + self.heap = [(0)] + + def perc_up(self, i): + while i // 2 > 0: + if self.heap[i] < self.heap[i // 2]: + # Swap value of child with value of its parent + tmp = self.heap[i] + self.heap[i] = self.heap[i // 2] + self.heap[i // 2] = tmp + i = i // 2 + + """ + Method insert always start by inserting the element at the bottom. + it inserts rightmost spot so as to maintain the complete tree property + Then, it fix the tree by swapping the new element with its parent, + until it finds an appropriate spot for the element. It essentially + perc_up the minimum element + Complexity: O(logN) + """ + def insert(self, val): + self.heap.append(val) + self.currentSize = self.currentSize + 1 + self.perc_up(self.currentSize) + + """ + Method min_child returns index of smaller 2 childs of its parent + """ + def min_child(self, i): + if 2 * i + 1 > self.currentSize: # No right child + return 2 * i + else: + # left child > right child + if self.heap[2 * i] > self.heap[2 * i +1]: + return 2 * i + 1 + else: + return 2 * i + + def perc_down(self, i): + while 2 * i < self.currentSize: + min_child = self.min_child(i) + if self.heap[min_child] < self.heap[i]: + # Swap min child with parent + tmp = self.heap[min_child] + self.heap[min_child] = self.heap[i] + self.heap[i] = tmp + i = min_child + """ + Remove Min method removes the minimum element and swap it with the last + element in the heap( the bottommost, rightmost element). Then, it + perc_down this element, swapping it with one of its children until the + min heap property is restored + Complexity: O(logN) + """ + def remove_min(self): + ret = self.heap[1] # the smallest value at beginning + self.heap[1] = self.heap[self.currentSize] # Repalce it by the last value + self.currentSize = self.currentSize - 1 + self.heap.pop() + self.perc_down(1) + return ret + +class TestSuite(unittest.TestCase): + """ + Test suite for the Binary_Heap data structures + """ + def setUp(self): + self.min_heap = Binary_Heap() + self.min_heap.insert(4) + self.min_heap.insert(50) + self.min_heap.insert(7) + self.min_heap.insert(55) + self.min_heap.insert(90) + self.min_heap.insert(87) + + def test_insert(self): + # Before insert 2: [0, 4, 50, 7, 55, 90, 87] + # After insert: [0, 2, 50, 4, 55, 90, 87, 7] + self.min_heap.insert(2) + self.assertEqual([0, 2, 50, 4, 55, 90, 87, 7], + self.min_heap.heap) + self.assertEqual(7, self.min_heap.currentSize) + + def test_remove_min(self): + ret = self.min_heap.remove_min() + # Before remove_min : [0, 4, 50, 7, 55, 90, 87] + # After remove_min: [7, 50, 87, 55, 90] + # Test return value + self.assertEqual(4,ret) + self.assertEqual([0, 7, 50, 87, 55, 90], + self.min_heap.heap) + self.assertEqual(5, self.min_heap.currentSize) + +if __name__ == "__main__": + unittest.main() From 064c0ba9ff18e52c144977d5d8f1c33691c39427 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sun, 8 Apr 2018 14:54:20 +0200 Subject: [PATCH 189/387] changed xrange to range --- dfs/sudoku_solver.py | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/dfs/sudoku_solver.py b/dfs/sudoku_solver.py index d28d709d8..4f3c27530 100644 --- a/dfs/sudoku_solver.py +++ b/dfs/sudoku_solver.py @@ -23,11 +23,6 @@ import unittest -try: - xrange -except: - xrange = range - class Sudoku: def __init__ (self, board, row, col): self.board = board @@ -38,8 +33,8 @@ def __init__ (self, board, row, col): def possible_values(self): a = "123456789" d, val = {}, {} - for i in xrange(self.row): - for j in xrange(self.col): + for i in range(self.row): + for j in range(self.col): ele = self.board[i][j] if ele != ".": d[("r", i)] = d.get(("r", i), []) + [ele] From 0af92da76c998d2d5dfc267dadb984e4af5cb09f Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sun, 8 Apr 2018 15:10:44 +0200 Subject: [PATCH 190/387] fixed merge_sort.py --- sort/merge_sort.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sort/merge_sort.py b/sort/merge_sort.py index e2f2d2a27..1f14081ef 100644 --- a/sort/merge_sort.py +++ b/sort/merge_sort.py @@ -5,7 +5,7 @@ def merge_sort(arr): # Our recursive base case if len(arr)<= 1: return arr - mid = len(arr)/2 + mid = len(arr)//2 # Perform merge_sort recursively on both halves left, right = merge_sort(arr[mid:]), merge_sort(arr[:mid]) From 6deede63d5659942392f9754af8b76246a3c2669 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sun, 8 Apr 2018 15:17:33 +0200 Subject: [PATCH 191/387] fixed insertion_sort.py. --- sort/insertion_sort.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sort/insertion_sort.py b/sort/insertion_sort.py index 99bd2058c..04ae0abb0 100644 --- a/sort/insertion_sort.py +++ b/sort/insertion_sort.py @@ -2,7 +2,7 @@ def insertion_sort(arr): """ Insertion Sort Complexity: O(n^2) """ - for i in xrange(len(arr)): + for i in range(len(arr)): cursor = arr[i] pos = i while pos > 0 and arr[pos-1] > cursor: @@ -11,4 +11,4 @@ def insertion_sort(arr): pos = pos-1 # Break and do the final swap arr[pos] = cursor - return arr + return arr \ No newline at end of file From 298f5b3dcebb0f4d09c2ab2c786115dbf38cadd4 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sun, 8 Apr 2018 15:21:53 +0200 Subject: [PATCH 192/387] fixed selection_sort.py --- sort/selection_sort.py | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/sort/selection_sort.py b/sort/selection_sort.py index acb0e30da..b30ef0756 100644 --- a/sort/selection_sort.py +++ b/sort/selection_sort.py @@ -3,9 +3,9 @@ def selection_sort(arr): """ Selection Sort Complexity: O(n^2) """ - for i in xrange(len(arr)): + for i in range(len(arr)): minimum = i - for j in xrange(i+1, len(arr)): + for j in range(i+1, len(arr)): # "Select" the correct value if arr[j] < arr[minimum]: minimum = j @@ -13,4 +13,3 @@ def selection_sort(arr): arr[minimum], arr[i] = arr[i], arr[minimum] return arr - From 03fa590152369c5f5fa7141fac30b58bafb1c91b Mon Sep 17 00:00:00 2001 From: Sa'd Date: Sun, 8 Apr 2018 13:04:29 -0500 Subject: [PATCH 193/387] Create merge_string_checker.py --- strings/merge_string_checker.py | 38 +++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 strings/merge_string_checker.py diff --git a/strings/merge_string_checker.py b/strings/merge_string_checker.py new file mode 100644 index 000000000..5138d5e25 --- /dev/null +++ b/strings/merge_string_checker.py @@ -0,0 +1,38 @@ +""" +At a job interview, you are challenged to write an algorithm to check if a given string, s, can be formed from two other strings, part1 and part2. +The restriction is that the characters in part1 and part2 are in the same order as in s. +The interviewer gives you the following example and tells you to figure out the rest from the given test cases. +'codewars' is a merge from 'cdw' and 'oears': +s: c o d e w a r s = codewars +part1: c d w = cdw +part2: o e a r s = oears +""" + +# Recursive Solution +def is_merge(s, part1, part2): + if not part1: + return s == part2 + if not part2: + return s == part1 + if not s: + return part1 + part2 == '' + if s[0] == part1[0] and is_merge(s[1:], part1[1:], part2): + return True + if s[0] == part2[0] and is_merge(s[1:], part1, part2[1:]): + return True + return False + +# Queue ADT +def is_merge(s, part1, part2): + queue = [(s,part1,part2)] + while queue: + str, p1, p2 = queue.pop() + if str: + if p1 and str[0] == p1[0]: + queue.append((str[1:], p1[1:], p2)) + if p2 and str[0] == p2[0]: + queue.append((str[1:], p1, p2[1:])) + else: + if not p1 and not p2: + return True + return False From 7d72c6d545b8425cc0a124ab789afc7bc0b66442 Mon Sep 17 00:00:00 2001 From: Sa'd Date: Sun, 8 Apr 2018 13:05:47 -0500 Subject: [PATCH 194/387] Update README.md --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index 3796074c2..7b251f3dd 100644 --- a/README.md +++ b/README.md @@ -182,6 +182,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [remove_min](stack/remove_min.py) - [is_sorted](stack/is_sorted.py) - [strings](strings) + - [merge_string_checker](strings/merge_string_checker.py) - [add_binary](strings/add_binary.py) - [breaking_bad](strings/breaking_bad.py) - [decode_string](strings/decode_string.py) From 2b395f1688c8b572d81cbda7e392c87774ad4e6a Mon Sep 17 00:00:00 2001 From: Sa'd Date: Sun, 8 Apr 2018 13:04:29 -0500 Subject: [PATCH 195/387] Create merge_string_checker.py PR changes. --- README.md | 1 + strings/merge_string_checker.py | 38 +++++++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+) create mode 100644 strings/merge_string_checker.py diff --git a/README.md b/README.md index 3796074c2..7b251f3dd 100644 --- a/README.md +++ b/README.md @@ -182,6 +182,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [remove_min](stack/remove_min.py) - [is_sorted](stack/is_sorted.py) - [strings](strings) + - [merge_string_checker](strings/merge_string_checker.py) - [add_binary](strings/add_binary.py) - [breaking_bad](strings/breaking_bad.py) - [decode_string](strings/decode_string.py) diff --git a/strings/merge_string_checker.py b/strings/merge_string_checker.py new file mode 100644 index 000000000..82eba52e0 --- /dev/null +++ b/strings/merge_string_checker.py @@ -0,0 +1,38 @@ +""" +At a job interview, you are challenged to write an algorithm to check if a given stringing, s, can be formed from two other stringings, part1 and part2. +The restringiction is that the characters in part1 and part2 are in the same order as in s. +The interviewer gives you the following example and tells you to figure out the rest from the given test cases. +'codewars' is a merge from 'cdw' and 'oears': +s: c o d e w a r s = codewars +part1: c d w = cdw +part2: o e a r s = oears +""" + +# Recursive Solution +def is_merge(s, part1, part2): + if not part1: + return s == part2 + if not part2: + return s == part1 + if not s: + return part1 + part2 == '' + if s[0] == part1[0] and is_merge(s[1:], part1[1:], part2): + return True + if s[0] == part2[0] and is_merge(s[1:], part1, part2[1:]): + return True + return False + +# An iterative approach +def is_merge(s, part1, part2): + tuple_list = [(s, part1, part2)] + while tuple_list: + string, p1, p2 = tuple_list.pop() + if string: + if p1 and string[0] == p1[0]: + tuple_list.append((string[1:], p1[1:], p2)) + if p2 and string[0] == p2[0]: + tuple_list.append((string[1:], p1, p2[1:])) + else: + if not p1 and not p2: + return True + return False From cd2be8952f304b855ec1b092bbfb69162d01325a Mon Sep 17 00:00:00 2001 From: Sa'd Date: Sun, 8 Apr 2018 15:53:54 -0500 Subject: [PATCH 196/387] Update merge_string_checker.py --- strings/merge_string_checker.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/strings/merge_string_checker.py b/strings/merge_string_checker.py index 1801c7b6e..0135f7e4c 100644 --- a/strings/merge_string_checker.py +++ b/strings/merge_string_checker.py @@ -9,7 +9,7 @@ """ # Recursive Solution -def is_merge(s, part1, part2): +def is_merge_recursive(s, part1, part2): if not part1: return s == part2 if not part2: @@ -23,7 +23,7 @@ def is_merge(s, part1, part2): return False # An iterative approach -def is_merge(s, part1, part2): +def is_merge_iterative(s, part1, part2): tuple_list = [(s, part1, part2)] while tuple_list: string, p1, p2 = tuple_list.pop() From 204e4227088a56a1cd21d06167ff3e15e204ca1b Mon Sep 17 00:00:00 2001 From: Sa'd Date: Sun, 8 Apr 2018 15:53:54 -0500 Subject: [PATCH 197/387] Update merge_string_checker.py --- strings/merge_string_checker.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/strings/merge_string_checker.py b/strings/merge_string_checker.py index 1801c7b6e..0135f7e4c 100644 --- a/strings/merge_string_checker.py +++ b/strings/merge_string_checker.py @@ -9,7 +9,7 @@ """ # Recursive Solution -def is_merge(s, part1, part2): +def is_merge_recursive(s, part1, part2): if not part1: return s == part2 if not part2: @@ -23,7 +23,7 @@ def is_merge(s, part1, part2): return False # An iterative approach -def is_merge(s, part1, part2): +def is_merge_iterative(s, part1, part2): tuple_list = [(s, part1, part2)] while tuple_list: string, p1, p2 = tuple_list.pop() From 19c6f78d040ed7c429f740a8e71232c45c10e760 Mon Sep 17 00:00:00 2001 From: danghai Date: Sun, 8 Apr 2018 22:44:39 -0700 Subject: [PATCH 198/387] Implement bst tree --- tree/bst/bst.py | 146 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 146 insertions(+) create mode 100644 tree/bst/bst.py diff --git a/tree/bst/bst.py b/tree/bst/bst.py new file mode 100644 index 000000000..493e47c12 --- /dev/null +++ b/tree/bst/bst.py @@ -0,0 +1,146 @@ +""" +Implement Binary Search Tree. It has method: + 1. Insert + 2. Search + 3. Size + 4. Traversal (Preorder, Inorder, Postorder) +""" + +import unittest + +class Node(object): + def __init__(self, data): + self.data = data + self.left = None + self.right = None + +class bst(object): + def __init__(self): + self.root = None + + def get_root(self): + return self.root + + """ + Get the number of elements + Using recursion. Complexity O(logN) + """ + def size(self): + return self.recur_size(self.root) + + def recur_size(self, root): + if root is None: + return 0 + elif root.left is None: + return 1 + self.recur_size(root.right) + elif root.right is None: + return 1 + self.recur_size(root.left) + else: + return 1 + self.recur_size(root.left) + self.recur_size(root.right) + + """ + Search data in bst + Using recursion. Complexity O(logN) + """ + def search(self, data): + if self.root: + return self.recur_search(self.root, data) + else: + return False + + def recur_search(self, root, data): + if root.data == data: + return True + elif root.left is None and root.right is None: + return False + elif data > root.data: # Go to right root + return self.recur_search(root.right, data) + else: # Go to left root + return self.recur_search(root.left, data) + + """ + Insert data in bst + Using recursion. Complexity O(logN) + """ + def insert(self, data): + if self.root: + return self.recur_insert(self.root, data) + else: + self.root = Node(data) + return True + + def recur_insert(self, root, data): + if root.data == data: # The data is already there + return False + elif data < root.data: # Go to left root + if root.left: # If left root is a node + return self.recur_insert(root.left, data) + else: # left root is a None + root.left = Node(data) + return True + else: # Go to right root + if root.right: # If right root is a node + return self.recur_insert(root.right, data) + else: + root.right = Node(data) + return True + + """ + Preorder, Postorder, Inorder traversal bst + """ + def preorder(self, root): + if root: + print(str(root.data), end = ' ') + self.preorder(root.left) + self.preorder(root.right) + + def inorder(self, root): + if root: + self.preorder(root.left) + print(str(root.data), end = ' ') + self.preorder(root.right) + + def postorder(self, root): + if root: + self.preorder(root.left) + self.preorder(root.right) + print(str(root.data), end = ' ') + +""" + The tree is created for testing: + + 10 + / \ + 6 15 + / \ / \ + 4 9 12 24 + / / \ + 7 20 30 + / + 13 +""" + +class TestSuite(unittest.TestCase): + def setUp(self): + self.tree = bst() + self.tree.insert(10) + self.tree.insert(15) + self.tree.insert(6) + self.tree.insert(4) + self.tree.insert(9) + self.tree.insert(12) + self.tree.insert(24) + self.tree.insert(7) + self.tree.insert(20) + self.tree.insert(30) + self.tree.insert(13) + + def test_search(self): + self.assertTrue(self.tree.search(24)) + self.assertFalse(self.tree.search(50)) + + def test_size(self): + self.assertEqual(11, self.tree.size()) + +if __name__ == '__main__': + unittest.main() From b7343c99a508f17a75c8e4a6f81265ca1b907bd3 Mon Sep 17 00:00:00 2001 From: tratneshsingh Date: Mon, 9 Apr 2018 06:01:32 -0700 Subject: [PATCH 199/387] Update first_occurance.py The earlier code fails to output the right index for following input: (Note that the first value '1' is repeated) array = [1, 1, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 6, 6, 6] firstOccurance(array, 1) --- search/first_occurance.py | 66 +++++++++++++++++---------------------- 1 file changed, 29 insertions(+), 37 deletions(-) diff --git a/search/first_occurance.py b/search/first_occurance.py index 63d77b808..7245d8702 100644 --- a/search/first_occurance.py +++ b/search/first_occurance.py @@ -4,42 +4,34 @@ # T(n)- O(log n) # +import unittest def firstOccurance(array, query): - lo, hi = 0, len(array) - 1 - while lo <= hi: - mid = (hi + lo) // 2 - print("lo: ", lo, " hi: ", hi, " mid: ", mid) - if (mid == 0 and array[mid] == query) or \ - (array[mid] == query and array[mid-1] < query): - return mid - elif array[mid] <= query: - lo = mid + 1 - else: - hi = mid - 1 - - -def main(): - array = [1, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 6, 6, 6] - print(array) - print("-----SEARCH-----") - query = 3 - print("found first: ", query, " in index:", firstOccurance(array, query)) - print("-----SEARCH-----") - query = 5 - print("found first: ", query, " in index:", firstOccurance(array, query)) - print("-----SEARCH-----") - query = 7 - print("found first: ", query, " in index:", firstOccurance(array, query)) - print("-----SEARCH-----") - query = 1 - print("found first: ", query, " in index:", firstOccurance(array, query)) - print("-----SEARCH-----") - query = -1 - print("found first: ", query, " in index:", firstOccurance(array, query)) - print("-----SEARCH-----") - query = 9 - print("found first: ", query, " in index:", firstOccurance(array, query)) - -if __name__ == "__main__": - main() + lo, hi = 0, len(array) + while lo < hi: + mid = lo + (hi - lo) // 2 + #print("lo: ", lo, " hi: ", hi, " mid: ", mid) + if array[mid] < query: lo = mid + 1 + else: hi = mid + if lo < len(array) and array[lo] == query: + return lo + + +class TestSuite(unittest.TestCase): + + def test_firstOccurance(self): + def helper(array, query): + idx = array.index(query) if query in array else None + return idx + array = [1, 1, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 6, 6, 6] + self.assertEqual(firstOccurance(array, 1), helper(array, 1)) + self.assertEqual(firstOccurance(array, 3), helper(array, 3)) + self.assertEqual(firstOccurance(array, 5), helper(array, 5)) + self.assertEqual(firstOccurance(array, 6), helper(array, 6)) + self.assertEqual(firstOccurance(array, 7), helper(array, 7)) + self.assertEqual(firstOccurance(array, -1), helper(array, -1)) + + +if __name__ == '__main__': + + unittest.main() From a0037cdd7fbacdc1f4e594ea297234935da69e2f Mon Sep 17 00:00:00 2001 From: tratneshsingh Date: Mon, 9 Apr 2018 06:30:11 -0700 Subject: [PATCH 200/387] Update bst.py Removing redundant checks moving root is None check in recur_search/recur_size. Similar change could be done in recur_insert. ```python def insert(self,data): self.root = self.recur_insert(self.root, data) def recur_insert(self, root, data): if root is None: return Node(data) if root.data == data: return # Do Nothing elif data < root.data: root.left = self.recur_insert(root.left, data) else: root.right = self.recur_insert(root.right, data) ``` --- tree/bst/bst.py | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) diff --git a/tree/bst/bst.py b/tree/bst/bst.py index 493e47c12..e7691f222 100644 --- a/tree/bst/bst.py +++ b/tree/bst/bst.py @@ -31,10 +31,6 @@ def size(self): def recur_size(self, root): if root is None: return 0 - elif root.left is None: - return 1 + self.recur_size(root.right) - elif root.right is None: - return 1 + self.recur_size(root.left) else: return 1 + self.recur_size(root.left) + self.recur_size(root.right) @@ -43,16 +39,13 @@ def recur_size(self, root): Using recursion. Complexity O(logN) """ def search(self, data): - if self.root: - return self.recur_search(self.root, data) - else: - return False + return self.recur_search(self.root, data) def recur_search(self, root, data): + if root is None: + return False if root.data == data: return True - elif root.left is None and root.right is None: - return False elif data > root.data: # Go to right root return self.recur_search(root.right, data) else: # Go to left root From c8e0a5068a94117d3fafa02e5ef09403274ccf0c Mon Sep 17 00:00:00 2001 From: tratneshsingh Date: Mon, 9 Apr 2018 06:41:41 -0700 Subject: [PATCH 201/387] Update first_occurance.py Incorporated review comments for https://github.com/keon/algorithms/pull/206 --- search/first_occurance.py | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/search/first_occurance.py b/search/first_occurance.py index 7245d8702..bcc2094a4 100644 --- a/search/first_occurance.py +++ b/search/first_occurance.py @@ -7,16 +7,19 @@ import unittest def firstOccurance(array, query): - lo, hi = 0, len(array) - while lo < hi: - mid = lo + (hi - lo) // 2 + lo, hi = 0, len(array) - 1 + while lo <= hi: + mid = (hi + lo) // 2 #print("lo: ", lo, " hi: ", hi, " mid: ", mid) - if array[mid] < query: lo = mid + 1 - else: hi = mid - if lo < len(array) and array[lo] == query: + if lo == hi: + break + if array[mid] < query: + lo = mid + 1 + else: + hi = mid + if array[lo] == query: return lo - class TestSuite(unittest.TestCase): def test_firstOccurance(self): From 76f5bb0959773c5114bd039e4030632c7a53f0d7 Mon Sep 17 00:00:00 2001 From: tratneshsingh Date: Mon, 9 Apr 2018 08:34:45 -0700 Subject: [PATCH 202/387] Update first_occurance.py Address Keon Review comments. --- search/first_occurance.py | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/search/first_occurance.py b/search/first_occurance.py index bcc2094a4..477fb000d 100644 --- a/search/first_occurance.py +++ b/search/first_occurance.py @@ -8,16 +8,14 @@ def firstOccurance(array, query): lo, hi = 0, len(array) - 1 - while lo <= hi: - mid = (hi + lo) // 2 + while lo < hi: + mid = lo + (hi - lo) // 2 #print("lo: ", lo, " hi: ", hi, " mid: ", mid) - if lo == hi: - break if array[mid] < query: lo = mid + 1 else: hi = mid - if array[lo] == query: + if lo < len(array) and array[lo] == query: return lo class TestSuite(unittest.TestCase): From 9d1bd8911cf52825e8432fad8e768dce881392a8 Mon Sep 17 00:00:00 2001 From: tratneshsingh Date: Mon, 9 Apr 2018 08:41:46 -0700 Subject: [PATCH 203/387] Update first_occurance.py Fixing the infinite loop. It is good idea to keep the following loop condition always in binary search and incorporating additional conditions if required within the while lo <= hi: loop instead of writing multiple variants as https://leetcode.com/articles/introduction-to-binary-search/ lo, hi = 0, len(array) - 1 --- search/first_occurance.py | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/search/first_occurance.py b/search/first_occurance.py index 477fb000d..6016e6938 100644 --- a/search/first_occurance.py +++ b/search/first_occurance.py @@ -8,14 +8,16 @@ def firstOccurance(array, query): lo, hi = 0, len(array) - 1 - while lo < hi: + while lo <= hi: mid = lo + (hi - lo) // 2 #print("lo: ", lo, " hi: ", hi, " mid: ", mid) + if lo == hi: + break if array[mid] < query: lo = mid + 1 else: hi = mid - if lo < len(array) and array[lo] == query: + if array[lo] == query: return lo class TestSuite(unittest.TestCase): From 6ea119908187c9c68ffb46515e42a2afdffea386 Mon Sep 17 00:00:00 2001 From: danghai Date: Mon, 9 Apr 2018 14:51:03 -0700 Subject: [PATCH 204/387] Add depth_sum to bst --- README.md | 1 + tree/bst/depth_sum.py | 66 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 67 insertions(+) create mode 100644 tree/bst/depth_sum.py diff --git a/README.md b/README.md index 7b251f3dd..3f816562d 100644 --- a/README.md +++ b/README.md @@ -213,6 +213,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [serialize_deserialize](tree/bst/serialize_deserialize.py) - [successor](tree/bst/successor.py) - [unique_bst](tree/bst/unique_bst.py) + - [depth_sum](tree/bst/depth_sum.py) - [red_black_tree](tree/red_black_tree) - [red_black_tree](tree/red_black_tree/red_black_tree.py) - [segment_tree](tree/segment_tree) diff --git a/tree/bst/depth_sum.py b/tree/bst/depth_sum.py new file mode 100644 index 000000000..9674e65dd --- /dev/null +++ b/tree/bst/depth_sum.py @@ -0,0 +1,66 @@ +""" +Write a function depthSum returns the sum of the values stored +in a binary search tree of integers weighted by the depth of each value. + +For example: + + 9 + / \ + 6 12 + / \ / \ + 3 8 10 15 + / \ + 7 18 + + depth_sum = 1*9 + 2*(6+12) + 3*(3+8+10+15) + 4*(7+18) + +""" +import unittest +from bst import Node +from bst import bst + +def depth_sum(root, n): + if root: + return recur_depth_sum(root, 1) + +def recur_depth_sum(root, n): + if root is None: + return 0 + elif root.left is None and root.right is None: + return root.data * n + else: + return n * root.data + recur_depth_sum(root.left, n+1) + recur_depth_sum(root.right, n+1) + +""" + The tree is created for testing: + + 9 + / \ + 6 12 + / \ / \ + 3 8 10 15 + / \ + 7 18 + + depth_sum = 1*9 + 2*(6+12) + 3*(3+8+10+15) + 4*(7+18) + +""" + +class TestSuite(unittest.TestCase): + def setUp(self): + self.tree = bst() + self.tree.insert(9) + self.tree.insert(6) + self.tree.insert(12) + self.tree.insert(3) + self.tree.insert(8) + self.tree.insert(10) + self.tree.insert(15) + self.tree.insert(7) + self.tree.insert(18) + + def test_depth_sum(self): + self.assertEqual(253, depth_sum(self.tree.root, 4)) + +if __name__ == '__main__': + unittest.main() From d17793d1b55165560cba9a3a105648ed6021afd6 Mon Sep 17 00:00:00 2001 From: danghai Date: Mon, 9 Apr 2018 15:06:43 -0700 Subject: [PATCH 205/387] Add count_left_node.py to bst --- README.md | 1 + tree/bst/count_left_node.py | 61 +++++++++++++++++++++++++++++++++++++ 2 files changed, 62 insertions(+) create mode 100644 tree/bst/count_left_node.py diff --git a/README.md b/README.md index 3f816562d..3ede7cbe5 100644 --- a/README.md +++ b/README.md @@ -214,6 +214,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [successor](tree/bst/successor.py) - [unique_bst](tree/bst/unique_bst.py) - [depth_sum](tree/bst/depth_sum.py) + - [count_left_node](tree/bst/count_left_node.py) - [red_black_tree](tree/red_black_tree) - [red_black_tree](tree/red_black_tree/red_black_tree.py) - [segment_tree](tree/segment_tree) diff --git a/tree/bst/count_left_node.py b/tree/bst/count_left_node.py new file mode 100644 index 000000000..aa4155566 --- /dev/null +++ b/tree/bst/count_left_node.py @@ -0,0 +1,61 @@ +""" +Write a function count_left_node returns the number of left children in the +tree. For example: the following tree has four left children (the nodes +storing the values 6, 3, 7, and 10): + + 9 + / \ + 6 12 + / \ / \ + 3 8 10 15 + / \ + 7 18 + + count_left_node = 4 + +""" +import unittest +from bst import Node +from bst import bst + +def count_left_node(root): + if root is None: + return 0 + elif root.left is None: + return count_left_node(root.right) + else: + return 1 + count_left_node(root.left) + count_left_node(root.right) + +""" + The tree is created for testing: + + 9 + / \ + 6 12 + / \ / \ + 3 8 10 15 + / \ + 7 18 + + count_left_node = 4 + +""" + +class TestSuite(unittest.TestCase): + def setUp(self): + self.tree = bst() + self.tree.insert(9) + self.tree.insert(6) + self.tree.insert(12) + self.tree.insert(3) + self.tree.insert(8) + self.tree.insert(10) + self.tree.insert(15) + self.tree.insert(7) + self.tree.insert(18) + + def test_count_left_node(self): + self.assertEqual(4, count_left_node(self.tree.root)) + +if __name__ == '__main__': + unittest.main() From 3105528f04c0f6d30d6a30ba935173a8a09718f2 Mon Sep 17 00:00:00 2001 From: danghai Date: Mon, 9 Apr 2018 15:12:25 -0700 Subject: [PATCH 206/387] Fix typo example in bst --- tree/bst/bst.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tree/bst/bst.py b/tree/bst/bst.py index e7691f222..05dc697b8 100644 --- a/tree/bst/bst.py +++ b/tree/bst/bst.py @@ -110,7 +110,7 @@ def postorder(self, root): / / \ 7 20 30 / - 13 + 18 """ class TestSuite(unittest.TestCase): @@ -126,7 +126,7 @@ def setUp(self): self.tree.insert(7) self.tree.insert(20) self.tree.insert(30) - self.tree.insert(13) + self.tree.insert(18) def test_search(self): self.assertTrue(self.tree.search(24)) From 3bb7a7a23404f65ed5da8768d88b6908c3444ed8 Mon Sep 17 00:00:00 2001 From: danghai Date: Mon, 9 Apr 2018 15:33:37 -0700 Subject: [PATCH 207/387] Add num_empty.py to bst --- README.md | 1 + tree/bst/num_empty.py | 67 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 68 insertions(+) create mode 100644 tree/bst/num_empty.py diff --git a/README.md b/README.md index 3ede7cbe5..dd1a7190c 100644 --- a/README.md +++ b/README.md @@ -215,6 +215,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [unique_bst](tree/bst/unique_bst.py) - [depth_sum](tree/bst/depth_sum.py) - [count_left_node](tree/bst/count_left_node.py) + - [num_empty](tree/bst/num_empty.py) - [red_black_tree](tree/red_black_tree) - [red_black_tree](tree/red_black_tree/red_black_tree.py) - [segment_tree](tree/segment_tree) diff --git a/tree/bst/num_empty.py b/tree/bst/num_empty.py new file mode 100644 index 000000000..36600e905 --- /dev/null +++ b/tree/bst/num_empty.py @@ -0,0 +1,67 @@ +""" +Write a function num_empty returns returns the number of empty branches in a +tree. Function should count the total number of empty branches among the nodes +of the tree. A leaf node has two empty branches. In the case, if root is None, +it considered as a 1 empty branch +For example: the following tree has 10 empty branch (* is empty branch) + + 9 __ + / \___ + 6 12 + / \ / \ + 3 8 10 15 + / \ / \ / \ / \ + * * 7 * * * * 18 + / \ / \ + * * * * + + empty_branch = 10 + +""" +import unittest +from bst import Node +from bst import bst + +def num_empty(root): + if root is None: + return 1 + elif root.left is None and root.right: + return 1 + num_empty(root.right) + elif root.right is None and root.left: + return 1 + num_empty(root.left) + else: + return num_empty(root.left) + num_empty(root.right) + +""" + The tree is created for testing: + + 9 + / \ + 6 12 + / \ / \ + 3 8 10 15 + / \ + 7 18 + + num_empty = 10 + +""" + +class TestSuite(unittest.TestCase): + def setUp(self): + self.tree = bst() + self.tree.insert(9) + self.tree.insert(6) + self.tree.insert(12) + self.tree.insert(3) + self.tree.insert(8) + self.tree.insert(10) + self.tree.insert(15) + self.tree.insert(7) + self.tree.insert(18) + + def test_num_empty(self): + self.assertEqual(10, num_empty(self.tree.root)) + +if __name__ == '__main__': + unittest.main() From 44dffaa1200845127b205fdd4c7d9b27d116e177 Mon Sep 17 00:00:00 2001 From: danghai Date: Mon, 9 Apr 2018 15:53:44 -0700 Subject: [PATCH 208/387] Add height.py to bst --- README.md | 1 + tree/bst/height.py | 60 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 61 insertions(+) create mode 100644 tree/bst/height.py diff --git a/README.md b/README.md index dd1a7190c..5ad04cdba 100644 --- a/README.md +++ b/README.md @@ -216,6 +216,7 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [depth_sum](tree/bst/depth_sum.py) - [count_left_node](tree/bst/count_left_node.py) - [num_empty](tree/bst/num_empty.py) + - [height](tree/bst/height.py) - [red_black_tree](tree/red_black_tree) - [red_black_tree](tree/red_black_tree/red_black_tree.py) - [segment_tree](tree/segment_tree) diff --git a/tree/bst/height.py b/tree/bst/height.py new file mode 100644 index 000000000..c84b0c013 --- /dev/null +++ b/tree/bst/height.py @@ -0,0 +1,60 @@ +""" +Write a function height returns the height of a tree. The height is defined to +be the number of levels. The empty tree has height 0, a tree of one node has +height 1, a root node with one or two leaves as children has height 2, and so on +For example: height of tree is 4 + + 9 + / \ + 6 12 + / \ / \ + 3 8 10 15 + / \ + 7 18 + + height = 4 + +""" +import unittest +from bst import Node +from bst import bst + +def height(root): + if root is None: + return 0 + else: + return 1 + max(height(root.left), height(root.right)) + +""" + The tree is created for testing: + + 9 + / \ + 6 12 + / \ / \ + 3 8 10 15 + / \ + 7 18 + + count_left_node = 4 + +""" + +class TestSuite(unittest.TestCase): + def setUp(self): + self.tree = bst() + self.tree.insert(9) + self.tree.insert(6) + self.tree.insert(12) + self.tree.insert(3) + self.tree.insert(8) + self.tree.insert(10) + self.tree.insert(15) + self.tree.insert(7) + self.tree.insert(18) + + def test_height(self): + self.assertEqual(4, height(self.tree.root)) + +if __name__ == '__main__': + unittest.main() From 445ab2965c3574ddb023b4ef65ae9b79edc0450c Mon Sep 17 00:00:00 2001 From: tratneshsingh Date: Mon, 9 Apr 2018 18:03:08 -0700 Subject: [PATCH 209/387] Update first_occurance.py Update the calculation of mid to the following instead of doing mid = lo + (hi-lo)//2 as python does not have overflow issues unlike other langauges c, c++, java,... mid = (lo+hi)//2 --- search/first_occurance.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/search/first_occurance.py b/search/first_occurance.py index 6016e6938..f4d8c7526 100644 --- a/search/first_occurance.py +++ b/search/first_occurance.py @@ -9,7 +9,7 @@ def firstOccurance(array, query): lo, hi = 0, len(array) - 1 while lo <= hi: - mid = lo + (hi - lo) // 2 + mid = (lo + hi) // 2 #print("lo: ", lo, " hi: ", hi, " mid: ", mid) if lo == hi: break From a2d9bbcb621463d14597e17fb532985788929b20 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 10 Apr 2018 23:00:09 +0530 Subject: [PATCH 210/387] typo in josephus --- array/circular_counter.py | 32 +++++++++++++++++--------------- 1 file changed, 17 insertions(+), 15 deletions(-) diff --git a/array/circular_counter.py b/array/circular_counter.py index 9d942dc81..b580217f0 100644 --- a/array/circular_counter.py +++ b/array/circular_counter.py @@ -8,9 +8,10 @@ Input: consider 123456789 members sitting in a circular fashion, Output: 369485271 """ +import unittest -def josepheus(int_list, skip): +def josephus(int_list, skip): skip = skip - 1 # list starts with 0 index idx = 0 len_list = (len(int_list)) @@ -19,22 +20,23 @@ def josepheus(int_list, skip): yield int_list.pop(idx) len_list -= 1 -import unittest -class TestJosepheus(unittest.TestCase): - def test_josepheues(self): +class TestJosephus(unittest.TestCase): + + def test_josephus(self): a = ['1', '2', '3', '4', '5', '6', '7', '8', '9'] - josepheus_generator = josepheus(a, 3) - self.assertEqual(next(josepheus_generator), '3') - self.assertEqual(next(josepheus_generator), '6') - self.assertEqual(next(josepheus_generator), '9') - self.assertEqual(next(josepheus_generator), '4') - self.assertEqual(next(josepheus_generator), '8') - self.assertEqual(next(josepheus_generator), '5') - self.assertEqual(next(josepheus_generator), '2') - self.assertEqual(next(josepheus_generator), '7') - self.assertEqual(next(josepheus_generator), '1') - self.assertRaises(StopIteration, next, josepheus_generator) + josephus_generator = josephus(a, 3) + self.assertEqual(next(josephus_generator), '3') + self.assertEqual(next(josephus_generator), '6') + self.assertEqual(next(josephus_generator), '9') + self.assertEqual(next(josephus_generator), '4') + self.assertEqual(next(josephus_generator), '8') + self.assertEqual(next(josephus_generator), '5') + self.assertEqual(next(josephus_generator), '2') + self.assertEqual(next(josephus_generator), '7') + self.assertEqual(next(josephus_generator), '1') + self.assertRaises(StopIteration, next, josephus_generator) + if __name__ == "__main__": From b2bb03b9eac168f51c059d0032259cbf785f3210 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 10 Apr 2018 23:28:17 +0530 Subject: [PATCH 211/387] moving tests and PEPE 8 fixes in flatten.py --- README.md | 4 +- README_CN.md | 2 +- array/__init__.py | 0 array/circular_counter.py | 43 ---------------- array/delete_nth.py | 36 ------------- array/flatten.py | 65 ++++-------------------- array/josephus_problem.py | 20 ++++++++ array/test_array.py | 103 ++++++++++++++++++++++++++++++++++++++ 8 files changed, 135 insertions(+), 138 deletions(-) create mode 100644 array/__init__.py delete mode 100644 array/circular_counter.py create mode 100644 array/josephus_problem.py create mode 100644 array/test_array.py diff --git a/README.md b/README.md index 5ad04cdba..e6e4b8ea2 100644 --- a/README.md +++ b/README.md @@ -14,9 +14,10 @@ Thanks for your interest in contributing! There are many ways to contribute to t ## List of Implementations - [array](array) - - [circular_counter](array/circular_counter.py) + - [delete_nth](array/delete_nth.py) - [flatten](array/flatten.py) - [garage](array/garage.py) + - [josephus_problem](array/josephus_problem.py) - [longest_non_repeat](array/longest_non_repeat.py/) - [merge_intervals](array/merge_intervals.py) - [missing_ranges](array/missing_ranges.py) @@ -26,7 +27,6 @@ Thanks for your interest in contributing! There are many ways to contribute to t - [three_sum](array/three_sum.py) - [two_sum](array/two_sum.py) - [move_zeros_to_end](array/move_zeros_to_end.py) - - [delete_nth](array/delete_nth.py) - [backtrack](backtrack) - [general_solution.md](backtrack/) - [anagram](backtrack/anagram.py) diff --git a/README_CN.md b/README_CN.md index 1c832ee8b..d1fd193de 100644 --- a/README_CN.md +++ b/README_CN.md @@ -9,7 +9,7 @@ python版数据结构和算法实现的简约版小示例 ## 实现列表 - [array:数组](array) - - [circular_counter：约瑟夫环](array/circular_counter.py) + - [circular_counter：约瑟夫环](array/josephus_problem.py) - [flatten：数组降维](array/flatten.py) - [garage：停车场](array/garage.py) - [longest_non_repeat：最长不重复子串](array/longest_non_repeat.py/) diff --git a/array/__init__.py b/array/__init__.py new file mode 100644 index 000000000..e69de29bb diff --git a/array/circular_counter.py b/array/circular_counter.py deleted file mode 100644 index b580217f0..000000000 --- a/array/circular_counter.py +++ /dev/null @@ -1,43 +0,0 @@ -""" -There are people sitting in a circular fashion, -print every third member while removing them, -the next counter starts immediately after the member is removed. -Print till all the members are exhausted. - -For example: -Input: consider 123456789 members sitting in a circular fashion, -Output: 369485271 -""" -import unittest - - -def josephus(int_list, skip): - skip = skip - 1 # list starts with 0 index - idx = 0 - len_list = (len(int_list)) - while len_list > 0: - idx = (skip+idx) % len_list # hash index to every 3rd - yield int_list.pop(idx) - len_list -= 1 - - -class TestJosephus(unittest.TestCase): - - def test_josephus(self): - a = ['1', '2', '3', '4', '5', '6', '7', '8', '9'] - josephus_generator = josephus(a, 3) - self.assertEqual(next(josephus_generator), '3') - self.assertEqual(next(josephus_generator), '6') - self.assertEqual(next(josephus_generator), '9') - self.assertEqual(next(josephus_generator), '4') - self.assertEqual(next(josephus_generator), '8') - self.assertEqual(next(josephus_generator), '5') - self.assertEqual(next(josephus_generator), '2') - self.assertEqual(next(josephus_generator), '7') - self.assertEqual(next(josephus_generator), '1') - self.assertRaises(StopIteration, next, josephus_generator) - - -if __name__ == "__main__": - - unittest.main() diff --git a/array/delete_nth.py b/array/delete_nth.py index b44cdd3d0..8d768a4ed 100644 --- a/array/delete_nth.py +++ b/array/delete_nth.py @@ -7,7 +7,6 @@ which leads to [1,2,3,1,2,3] """ import collections -import unittest # Time complexity O(n^2) @@ -31,38 +30,3 @@ def delete_nth(array, n): counts[i] += 1 return result - - -class TestSuite(unittest.TestCase): - - def test_delete_nth_naive(self): - - self.assertListEqual(delete_nth_naive([20, 37, 20, 21, 37, 21, 21], n=1), - [20, 37, 21]) - self.assertListEqual(delete_nth_naive([1, 1, 3, 3, 7, 2, 2, 2, 2], n=3), - [1, 1, 3, 3, 7, 2, 2, 2]) - self.assertListEqual(delete_nth_naive([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=3), - [1, 2, 3, 1, 1, 2, 2, 3, 3, 4, 5]) - self.assertListEqual(delete_nth_naive([], n=5), - []) - self.assertListEqual(delete_nth_naive([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=0), - []) - - def test_delete_nth(self): - - self.assertListEqual(delete_nth([20, 37, 20, 21, 37, 21, 21], n=1), - [20, 37, 21]) - self.assertListEqual(delete_nth([1, 1, 3, 3, 7, 2, 2, 2, 2], n=3), - [1, 1, 3, 3, 7, 2, 2, 2]) - self.assertListEqual(delete_nth([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=3), - [1, 2, 3, 1, 1, 2, 2, 3, 3, 4, 5]) - self.assertListEqual(delete_nth([], n=5), - []) - self.assertListEqual(delete_nth([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=0), - []) - - -if __name__ == '__main__': - - unittest.main() - diff --git a/array/flatten.py b/array/flatten.py index 56c3bb607..2b047461a 100644 --- a/array/flatten.py +++ b/array/flatten.py @@ -5,16 +5,18 @@ """ from collections import Iterable + # return list -def flatten(inputArr, outputArr=None): - if outputArr is None: - outputArr = [] - for ele in inputArr: +def flatten(input_arr, output_arr=None): + if output_arr is None: + output_arr = [] + for ele in input_arr: if isinstance(ele, Iterable): - flatten(ele, outputArr) + flatten(ele, output_arr) else: - outputArr.append(ele) - return outputArr + output_arr.append(ele) + return output_arr + # returns iterator def flatten_iter(iterable): @@ -27,52 +29,3 @@ def flatten_iter(iterable): yield from flatten(element) else: yield element - -import unittest - -class TestFlatten(unittest.TestCase): - def test_flatten(self): - nested_list = [2, 1, [3, [4, 5], 6], 7, [8]] - flattened = flatten(nested_list) - self.assertEqual(flattened, [2, 1, 3, 4, 5, 6, 7, 8]) - - nested_list = [[3, [4, 5], 6], 7, [8]] - flattened = flatten(nested_list) - self.assertEqual(flattened, [3, 4, 5, 6, 7, 8]) - - nested_list = [[], [8]] - flattened = flatten(nested_list) - self.assertEqual(flattened, [8]) - - def test_flatten_iter(self): - nested_list = [2, 1, [3, [4, 5], 6], 7, [8]] - flattened = flatten_iter(nested_list) - self.assertEqual(next(flattened), 2) - self.assertEqual(next(flattened), 1) - self.assertEqual(next(flattened), 3) - self.assertEqual(next(flattened), 4) - self.assertEqual(next(flattened), 5) - self.assertEqual(next(flattened), 6) - self.assertEqual(next(flattened), 7) - self.assertEqual(next(flattened), 8) - self.assertRaises(StopIteration, next, flattened) - - nested_list = [[3, [4, 5], 6], 7, [8]] - flattened = flatten_iter(nested_list) - self.assertEqual(next(flattened), 3) - self.assertEqual(next(flattened), 4) - self.assertEqual(next(flattened), 5) - self.assertEqual(next(flattened), 6) - self.assertEqual(next(flattened), 7) - self.assertEqual(next(flattened), 8) - self.assertRaises(StopIteration, next, flattened) - - nested_list = [[], [8]] - flattened = flatten_iter(nested_list) - self.assertEqual(next(flattened), 8) - self.assertRaises(StopIteration, next, flattened) - - -if __name__ == "__main__": - - unittest.main() diff --git a/array/josephus_problem.py b/array/josephus_problem.py new file mode 100644 index 000000000..f77c48a5c --- /dev/null +++ b/array/josephus_problem.py @@ -0,0 +1,20 @@ +""" +There are people sitting in a circular fashion, +print every third member while removing them, +the next counter starts immediately after the member is removed. +Print till all the members are exhausted. + +For example: +Input: consider 123456789 members sitting in a circular fashion, +Output: 369485271 +""" + + +def josephus(int_list, skip): + skip = skip - 1 # list starts with 0 index + idx = 0 + len_list = (len(int_list)) + while len_list > 0: + idx = (skip+idx) % len_list # hash index to every 3rd + yield int_list.pop(idx) + len_list -= 1 diff --git a/array/test_array.py b/array/test_array.py new file mode 100644 index 000000000..a95e921e9 --- /dev/null +++ b/array/test_array.py @@ -0,0 +1,103 @@ +from delete_nth import delete_nth, delete_nth_naive +from flatten import flatten, flatten_iter +from garage import garage +from josephus_problem import josephus + +import unittest + + +class TestJosephus(unittest.TestCase): + + def test_josephus(self): + + a = ['1', '2', '3', '4', '5', '6', '7', '8', '9'] + josephus_generator = josephus(a, 3) + self.assertEqual(next(josephus_generator), '3') + self.assertEqual(next(josephus_generator), '6') + self.assertEqual(next(josephus_generator), '9') + self.assertEqual(next(josephus_generator), '4') + self.assertEqual(next(josephus_generator), '8') + self.assertEqual(next(josephus_generator), '5') + self.assertEqual(next(josephus_generator), '2') + self.assertEqual(next(josephus_generator), '7') + self.assertEqual(next(josephus_generator), '1') + self.assertRaises(StopIteration, next, josephus_generator) + + +class TestDeleteNth(unittest.TestCase): + + def test_delete_nth_naive(self): + + self.assertListEqual(delete_nth_naive([20, 37, 20, 21, 37, 21, 21], n=1), + [20, 37, 21]) + self.assertListEqual(delete_nth_naive([1, 1, 3, 3, 7, 2, 2, 2, 2], n=3), + [1, 1, 3, 3, 7, 2, 2, 2]) + self.assertListEqual(delete_nth_naive([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=3), + [1, 2, 3, 1, 1, 2, 2, 3, 3, 4, 5]) + self.assertListEqual(delete_nth_naive([], n=5), + []) + self.assertListEqual(delete_nth_naive([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=0), + []) + + def test_delete_nth(self): + + self.assertListEqual(delete_nth([20, 37, 20, 21, 37, 21, 21], n=1), + [20, 37, 21]) + self.assertListEqual(delete_nth([1, 1, 3, 3, 7, 2, 2, 2, 2], n=3), + [1, 1, 3, 3, 7, 2, 2, 2]) + self.assertListEqual(delete_nth([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=3), + [1, 2, 3, 1, 1, 2, 2, 3, 3, 4, 5]) + self.assertListEqual(delete_nth([], n=5), + []) + self.assertListEqual(delete_nth([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=0), + []) + + +class TestFlatten(unittest.TestCase): + + def test_flatten(self): + + nested_list = [2, 1, [3, [4, 5], 6], 7, [8]] + flattened = flatten(nested_list) + self.assertEqual(flattened, [2, 1, 3, 4, 5, 6, 7, 8]) + + nested_list = [[3, [4, 5], 6], 7, [8]] + flattened = flatten(nested_list) + self.assertEqual(flattened, [3, 4, 5, 6, 7, 8]) + + nested_list = [[], [8]] + flattened = flatten(nested_list) + self.assertEqual(flattened, [8]) + + def test_flatten_iter(self): + + nested_list = [2, 1, [3, [4, 5], 6], 7, [8]] + flattened = flatten_iter(nested_list) + self.assertEqual(next(flattened), 2) + self.assertEqual(next(flattened), 1) + self.assertEqual(next(flattened), 3) + self.assertEqual(next(flattened), 4) + self.assertEqual(next(flattened), 5) + self.assertEqual(next(flattened), 6) + self.assertEqual(next(flattened), 7) + self.assertEqual(next(flattened), 8) + self.assertRaises(StopIteration, next, flattened) + + nested_list = [[3, [4, 5], 6], 7, [8]] + flattened = flatten_iter(nested_list) + self.assertEqual(next(flattened), 3) + self.assertEqual(next(flattened), 4) + self.assertEqual(next(flattened), 5) + self.assertEqual(next(flattened), 6) + self.assertEqual(next(flattened), 7) + self.assertEqual(next(flattened), 8) + self.assertRaises(StopIteration, next, flattened) + + nested_list = [[], [8]] + flattened = flatten_iter(nested_list) + self.assertEqual(next(flattened), 8) + self.assertRaises(StopIteration, next, flattened) + + +if __name__ == '__main__': + unittest.main() From 4586252fffe94bf20795740605d8e3fdd47694ac Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 10 Apr 2018 23:42:51 +0530 Subject: [PATCH 212/387] created test_array.py for all unittests in array/ module --- array/garage.py | 18 ---- array/longest_non_repeat.py | 31 ------- array/merge_intervals.py | 25 ------ array/missing_ranges.py | 19 ---- array/move_zeros_to_end.py | 17 ---- array/plus_one.py | 33 ------- array/rotate_array.py | 30 ------- array/summary_ranges.py | 18 ---- array/test_array.py | 175 ++++++++++++++++++++++++++++++++++++ array/three_sum.py | 17 ---- array/two_sum.py | 16 ---- 11 files changed, 175 insertions(+), 224 deletions(-) diff --git a/array/garage.py b/array/garage.py index 19b17ea61..d590343b7 100644 --- a/array/garage.py +++ b/array/garage.py @@ -30,7 +30,6 @@ 2 3 0 1 4 0 3 2 1 4 """ -import unittest def garage(initial, final): @@ -53,20 +52,3 @@ def garage(initial, final): steps += 1 return steps, seq - - -class TestSuite(unittest.TestCase): - - def test_garage(self): - - initial = [1, 2, 3, 0, 4] - final = [0, 3, 2, 1, 4] - steps, seq = garage(initial, final) - - self.assertEqual(steps, 4) - self.assertListEqual(seq, [[0, 2, 3, 1, 4], [2, 0, 3, 1, 4], [2, 3, 0, 1, 4], [0, 3, 2, 1, 4]]) - - -if __name__ == "__main__": - - unittest.main() diff --git a/array/longest_non_repeat.py b/array/longest_non_repeat.py index 055df0fd2..43f2055ed 100644 --- a/array/longest_non_repeat.py +++ b/array/longest_non_repeat.py @@ -8,7 +8,6 @@ Note that the answer must be a substring, "pwke" is a subsequence and not a substring. """ -import unittest def longest_non_repeat(string): @@ -45,33 +44,3 @@ def longest_non_repeat_two(string): max_len = max(max_len, index - start + 1) used_char[char] = index return max_len - - -class TestLongestNonRepeat(unittest.TestCase): - - def test_longest_non_repeat(self): - - string = "abcabcbb" - self.assertEqual(longest_non_repeat(string), 3) - - string = "bbbbb" - self.assertEqual(longest_non_repeat(string), 1) - - string = "pwwkew" - self.assertEqual(longest_non_repeat(string), 3) - - def test_longest_non_repeat_two(self): - - string = "abcabcbb" - self.assertEqual(longest_non_repeat_two(string), 3) - - string = "bbbbb" - self.assertEqual(longest_non_repeat_two(string), 1) - - string = "pwwkew" - self.assertEqual(longest_non_repeat_two(string), 3) - - -if __name__ == "__main__": - - unittest.main() diff --git a/array/merge_intervals.py b/array/merge_intervals.py index faa3ea866..c657bb838 100644 --- a/array/merge_intervals.py +++ b/array/merge_intervals.py @@ -1,7 +1,6 @@ """ Given a collection of intervals, merge all overlapping intervals. """ -import unittest class Interval: @@ -77,27 +76,3 @@ def merge_v2(intervals): else: out.append(i) return out - - -class TestMergeInterval(unittest.TestCase): - - def test_merge(self): - interval_list = [[1, 3], [2, 6], [8, 10], [15, 18]] - intervals = [Interval(i[0], i[1]) for i in interval_list] - merged_intervals = Interval.merge(intervals) - self.assertEqual( - merged_intervals, - [Interval(1, 6), Interval(8, 10), Interval(15, 18)] - ) - - def test_merge_v2(self): - interval_list = [[1, 3], [2, 6], [8, 10], [15, 18]] - merged_intervals = merge_v2(interval_list) - self.assertEqual( - merged_intervals, - [[1, 6], [8, 10], [15, 18]] - ) - - -if __name__ == "__main__": - unittest.main() diff --git a/array/missing_ranges.py b/array/missing_ranges.py index 10f14dc8d..68fcc4391 100644 --- a/array/missing_ranges.py +++ b/array/missing_ranges.py @@ -2,7 +2,6 @@ Find missing ranges between low and high in the given array. Ex) [3, 5] lo=1 hi=10 => answer: [(1, 2), (4, 4), (6, 10)] """ -import unittest def missing_ranges(arr, lo, hi): @@ -22,21 +21,3 @@ def missing_ranges(arr, lo, hi): res.append((start, hi)) return res - - -class TestSuite(unittest.TestCase): - - def test_missing_ranges(self): - - arr = [3, 5, 10, 11, 12, 15, 19] - - self.assertListEqual(missing_ranges(arr, 0, 20), - [(0, 2), (4, 4), (6, 9), (13, 14), (16, 18), (20, 20)]) - - self.assertListEqual(missing_ranges(arr, 6, 100), - [(6, 9), (13, 14), (16, 18), (20, 100)]) - - -if __name__ == '__main__': - - unittest.main() diff --git a/array/move_zeros_to_end.py b/array/move_zeros_to_end.py index 54ffce441..b2acd759d 100644 --- a/array/move_zeros_to_end.py +++ b/array/move_zeros_to_end.py @@ -6,7 +6,6 @@ The time complexity of the below algorithm is O(n). """ -import unittest def move_zeros(array): @@ -21,19 +20,3 @@ def move_zeros(array): result.extend([0] * zeros) return result - - -class TestSuite(unittest.TestCase): - - def test_move_zeros(self): - - self.assertListEqual(move_zeros([False, 1, 0, 1, 2, 0, 1, 3, "a"]), - [False, 1, 1, 2, 1, 3, "a", 0, 0]) - - self.assertListEqual(move_zeros([0, 34, 'rahul', [], None, 0, True, 0]), - [34, 'rahul', [], None, True, 0, 0, 0]) - - -if __name__ == '__main__': - - unittest.main() diff --git a/array/plus_one.py b/array/plus_one.py index 96fa206e4..9edb02fa5 100644 --- a/array/plus_one.py +++ b/array/plus_one.py @@ -5,7 +5,6 @@ The digits are stored such that the most significant digit is at the head of the list. """ -import unittest def plus_one(digits): @@ -47,35 +46,3 @@ def plus_one_v3(num_arr): if num_arr[idx]: return num_arr return [1] + num_arr - - -class TestSuite(unittest.TestCase): - - def test_plus_one(self): - - self.assertListEqual(plus_one([0]), [1]) - self.assertListEqual(plus_one([9]), [1, 0]) - self.assertListEqual(plus_one([1, 0, 9]), [1, 1, 0]) - self.assertListEqual(plus_one([9, 9, 8, 0, 0, 9]), [9, 9, 8, 0, 1, 0]) - self.assertListEqual(plus_one([9, 9, 9, 9]), [1, 0, 0, 0, 0]) - - def test_plus_one_v2(self): - - self.assertListEqual(plus_one_v2([0]), [1]) - self.assertListEqual(plus_one_v2([9]), [1, 0]) - self.assertListEqual(plus_one_v2([1, 0, 9]), [1, 1, 0]) - self.assertListEqual(plus_one_v2([9, 9, 8, 0, 0, 9]), [9, 9, 8, 0, 1, 0]) - self.assertListEqual(plus_one_v2([9, 9, 9, 9]), [1, 0, 0, 0, 0]) - - def test_plus_one_v3(self): - - self.assertListEqual(plus_one_v3([0]), [1]) - self.assertListEqual(plus_one_v3([9]), [1, 0]) - self.assertListEqual(plus_one_v3([1, 0, 9]), [1, 1, 0]) - self.assertListEqual(plus_one_v3([9, 9, 8, 0, 0, 9]), [9, 9, 8, 0, 1, 0]) - self.assertListEqual(plus_one_v3([9, 9, 9, 9]), [1, 0, 0, 0, 0]) - - -if __name__ == '__main__': - - unittest.main() \ No newline at end of file diff --git a/array/rotate_array.py b/array/rotate_array.py index b5f9318a2..d90035b58 100644 --- a/array/rotate_array.py +++ b/array/rotate_array.py @@ -8,7 +8,6 @@ Try to come up as many solutions as you can, there are at least 3 different ways to solve this problem. """ -import unittest def rotate_v1(array, k): @@ -60,32 +59,3 @@ def rotate_v3(array, k): length = len(array) k = k % length return array[length - k:] + array[:length - k] - - -class TestSuite(unittest.TestCase): - - def test_rotate_v1(self): - - self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=3), [5, 6, 7, 1, 2, 3, 4]) - self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=1), [7, 1, 2, 3, 4, 5, 6]) - self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=7), [1, 2, 3, 4, 5, 6, 7]) - self.assertListEqual(rotate_v1([1, 2], k=111), [2, 1]) - - def test_rotate_v2(self): - - self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=3), [5, 6, 7, 1, 2, 3, 4]) - self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=1), [7, 1, 2, 3, 4, 5, 6]) - self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=7), [1, 2, 3, 4, 5, 6, 7]) - self.assertListEqual(rotate_v2([1, 2], k=111), [2, 1]) - - def test_rotate_v3(self): - - self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=3), [5, 6, 7, 1, 2, 3, 4]) - self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=1), [7, 1, 2, 3, 4, 5, 6]) - self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=7), [1, 2, 3, 4, 5, 6, 7]) - self.assertListEqual(rotate_v3([1, 2], k=111), [2, 1]) - - -if __name__ == '__main__': - - unittest.main() diff --git a/array/summary_ranges.py b/array/summary_ranges.py index 4f3e9700b..3ee3417f2 100644 --- a/array/summary_ranges.py +++ b/array/summary_ranges.py @@ -4,7 +4,6 @@ For example, given [0, 1, 2, 4, 5, 7], return [(0, 2), (4, 5), (7, 7)]. """ -import unittest def summary_ranges(array): @@ -26,20 +25,3 @@ def summary_ranges(array): res.append((num, num)) i += 1 return res - - -class TestSuite(unittest.TestCase): - - def test_summary_ranges(self): - - self.assertListEqual(summary_ranges([0, 1, 2, 4, 5, 7]), - [(0, 2), (4, 5), (7, 7)]) - self.assertListEqual(summary_ranges([-5, -4, -3, 1, 2, 4, 5, 6]), - [(-5, -3), (1, 2), (4, 6)]) - self.assertListEqual(summary_ranges([-2, -1, 0, 1, 2]), - [(-2, 2)]) - - -if __name__ == '__main__': - - unittest.main() \ No newline at end of file diff --git a/array/test_array.py b/array/test_array.py index a95e921e9..15a89f0d0 100644 --- a/array/test_array.py +++ b/array/test_array.py @@ -2,6 +2,15 @@ from flatten import flatten, flatten_iter from garage import garage from josephus_problem import josephus +from longest_non_repeat import longest_non_repeat, longest_non_repeat_two +from merge_intervals import Interval, merge_v2 +from missing_ranges import missing_ranges +from move_zeros_to_end import move_zeros +from plus_one import plus_one, plus_one_v2, plus_one_v3 +from rotate_array import rotate_v1, rotate_v2, rotate_v3 +from summary_ranges import summary_ranges +from three_sum import three_sum +from two_sum import two_sum import unittest @@ -99,5 +108,171 @@ def test_flatten_iter(self): self.assertRaises(StopIteration, next, flattened) +class TestGarage(unittest.TestCase): + + def test_garage(self): + + initial = [1, 2, 3, 0, 4] + final = [0, 3, 2, 1, 4] + steps, seq = garage(initial, final) + + self.assertEqual(steps, 4) + self.assertListEqual(seq, [[0, 2, 3, 1, 4], [2, 0, 3, 1, 4], [2, 3, 0, 1, 4], [0, 3, 2, 1, 4]]) + + +class TestLongestNonRepeat(unittest.TestCase): + + def test_longest_non_repeat(self): + + string = "abcabcbb" + self.assertEqual(longest_non_repeat(string), 3) + + string = "bbbbb" + self.assertEqual(longest_non_repeat(string), 1) + + string = "pwwkew" + self.assertEqual(longest_non_repeat(string), 3) + + def test_longest_non_repeat_two(self): + + string = "abcabcbb" + self.assertEqual(longest_non_repeat_two(string), 3) + + string = "bbbbb" + self.assertEqual(longest_non_repeat_two(string), 1) + + string = "pwwkew" + self.assertEqual(longest_non_repeat_two(string), 3) + + +class TestMergeInterval(unittest.TestCase): + + def test_merge(self): + interval_list = [[1, 3], [2, 6], [8, 10], [15, 18]] + intervals = [Interval(i[0], i[1]) for i in interval_list] + merged_intervals = Interval.merge(intervals) + self.assertEqual( + merged_intervals, + [Interval(1, 6), Interval(8, 10), Interval(15, 18)] + ) + + def test_merge_v2(self): + interval_list = [[1, 3], [2, 6], [8, 10], [15, 18]] + merged_intervals = merge_v2(interval_list) + self.assertEqual( + merged_intervals, + [[1, 6], [8, 10], [15, 18]] + ) + + +class TestMissingRanges(unittest.TestCase): + + def test_missing_ranges(self): + + arr = [3, 5, 10, 11, 12, 15, 19] + + self.assertListEqual(missing_ranges(arr, 0, 20), + [(0, 2), (4, 4), (6, 9), (13, 14), (16, 18), (20, 20)]) + + self.assertListEqual(missing_ranges(arr, 6, 100), + [(6, 9), (13, 14), (16, 18), (20, 100)]) + + +class TestMoveZeros(unittest.TestCase): + + def test_move_zeros(self): + + self.assertListEqual(move_zeros([False, 1, 0, 1, 2, 0, 1, 3, "a"]), + [False, 1, 1, 2, 1, 3, "a", 0, 0]) + + self.assertListEqual(move_zeros([0, 34, 'rahul', [], None, 0, True, 0]), + [34, 'rahul', [], None, True, 0, 0, 0]) + + +class TestPlusOne(unittest.TestCase): + + def test_plus_one(self): + + self.assertListEqual(plus_one([0]), [1]) + self.assertListEqual(plus_one([9]), [1, 0]) + self.assertListEqual(plus_one([1, 0, 9]), [1, 1, 0]) + self.assertListEqual(plus_one([9, 9, 8, 0, 0, 9]), [9, 9, 8, 0, 1, 0]) + self.assertListEqual(plus_one([9, 9, 9, 9]), [1, 0, 0, 0, 0]) + + def test_plus_one_v2(self): + + self.assertListEqual(plus_one_v2([0]), [1]) + self.assertListEqual(plus_one_v2([9]), [1, 0]) + self.assertListEqual(plus_one_v2([1, 0, 9]), [1, 1, 0]) + self.assertListEqual(plus_one_v2([9, 9, 8, 0, 0, 9]), [9, 9, 8, 0, 1, 0]) + self.assertListEqual(plus_one_v2([9, 9, 9, 9]), [1, 0, 0, 0, 0]) + + def test_plus_one_v3(self): + + self.assertListEqual(plus_one_v3([0]), [1]) + self.assertListEqual(plus_one_v3([9]), [1, 0]) + self.assertListEqual(plus_one_v3([1, 0, 9]), [1, 1, 0]) + self.assertListEqual(plus_one_v3([9, 9, 8, 0, 0, 9]), [9, 9, 8, 0, 1, 0]) + self.assertListEqual(plus_one_v3([9, 9, 9, 9]), [1, 0, 0, 0, 0]) + + +class TestRotateArray(unittest.TestCase): + + def test_rotate_v1(self): + + self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=3), [5, 6, 7, 1, 2, 3, 4]) + self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=1), [7, 1, 2, 3, 4, 5, 6]) + self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=7), [1, 2, 3, 4, 5, 6, 7]) + self.assertListEqual(rotate_v1([1, 2], k=111), [2, 1]) + + def test_rotate_v2(self): + + self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=3), [5, 6, 7, 1, 2, 3, 4]) + self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=1), [7, 1, 2, 3, 4, 5, 6]) + self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=7), [1, 2, 3, 4, 5, 6, 7]) + self.assertListEqual(rotate_v2([1, 2], k=111), [2, 1]) + + def test_rotate_v3(self): + + self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=3), [5, 6, 7, 1, 2, 3, 4]) + self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=1), [7, 1, 2, 3, 4, 5, 6]) + self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=7), [1, 2, 3, 4, 5, 6, 7]) + self.assertListEqual(rotate_v3([1, 2], k=111), [2, 1]) + + +class TestSummaryRanges(unittest.TestCase): + + def test_summary_ranges(self): + + self.assertListEqual(summary_ranges([0, 1, 2, 4, 5, 7]), + [(0, 2), (4, 5), (7, 7)]) + self.assertListEqual(summary_ranges([-5, -4, -3, 1, 2, 4, 5, 6]), + [(-5, -3), (1, 2), (4, 6)]) + self.assertListEqual(summary_ranges([-2, -1, 0, 1, 2]), + [(-2, 2)]) + + +class TestThreeSum(unittest.TestCase): + + def test_three_sum(self): + + self.assertSetEqual(three_sum([-1, 0, 1, 2, -1, -4]), + {(-1, 0, 1), (-1, -1, 2)}) + + self.assertSetEqual(three_sum([-1, 3, 1, 2, -1, -4, -2]), + {(-4, 1, 3), (-2, -1, 3), (-1, -1, 2)}) + + +class TestSuite(unittest.TestCase): + + def test_two_sum(self): + + self.assertTupleEqual((0, 2), two_sum([2, 11, 7, 9], target=9)) + self.assertTupleEqual((0, 3), two_sum([-3, 5, 2, 3, 8, -9], target=0)) + + self.assertIsNone(two_sum([-3, 5, 2, 3, 8, -9], target=6)) + + if __name__ == '__main__': + unittest.main() diff --git a/array/three_sum.py b/array/three_sum.py index 986534ff9..524b83edd 100644 --- a/array/three_sum.py +++ b/array/three_sum.py @@ -13,7 +13,6 @@ (-1, -1, 2) } """ -import unittest def three_sum(array): @@ -47,19 +46,3 @@ def three_sum(array): l += 1 r -= 1 return res - - -class TestSuite(unittest.TestCase): - - def test_three_sum(self): - - self.assertSetEqual(three_sum([-1, 0, 1, 2, -1, -4]), - {(-1, 0, 1), (-1, -1, 2)}) - - self.assertSetEqual(three_sum([-1, 3, 1, 2, -1, -4, -2]), - {(-4, 1, 3), (-2, -1, 3), (-1, -1, 2)}) - - -if __name__ == "__main__": - - unittest.main() diff --git a/array/two_sum.py b/array/two_sum.py index 720eeadce..2b6f1ed0b 100644 --- a/array/two_sum.py +++ b/array/two_sum.py @@ -11,7 +11,6 @@ Because nums[0] + nums[1] = 2 + 7 = 9, return (0, 1) """ -import unittest def two_sum(array, target): @@ -22,18 +21,3 @@ def two_sum(array, target): else: dic[target - num] = i return None - - -class TestSuite(unittest.TestCase): - - def test_two_sum(self): - - self.assertTupleEqual((0, 2), two_sum([2, 11, 7, 9], target=9)) - self.assertTupleEqual((0, 3), two_sum([-3, 5, 2, 3, 8, -9], target=0)) - - self.assertIsNone(two_sum([-3, 5, 2, 3, 8, -9], target=6)) - - -if __name__ == "__main__": - - unittest.main() From 8b295e7c97f347aec695a9b9ded60e5fcb2f56a4 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 10 Apr 2018 23:59:29 +0530 Subject: [PATCH 213/387] add .travis.yml for Travis CI config --- .cache/v/cache/lastfailed | 15 +++++++++++++++ .travis.yml | 8 ++++++++ array/test_array.py | 28 ++++++++++++++-------------- 3 files changed, 37 insertions(+), 14 deletions(-) create mode 100644 .cache/v/cache/lastfailed create mode 100644 .travis.yml diff --git a/.cache/v/cache/lastfailed b/.cache/v/cache/lastfailed new file mode 100644 index 000000000..52d1b51a6 --- /dev/null +++ b/.cache/v/cache/lastfailed @@ -0,0 +1,15 @@ +{ + "array/test_array.py::TestDeleteNth": true, + "array/test_array.py::TestFlatten": true, + "array/test_array.py::TestGarage": true, + "array/test_array.py::TestJosephus": true, + "array/test_array.py::TestLongestNonRepeat": true, + "array/test_array.py::TestMergeInterval": true, + "array/test_array.py::TestMissingRanges": true, + "array/test_array.py::TestMoveZeros": true, + "array/test_array.py::TestPlusOne": true, + "array/test_array.py::TestRotateArray": true, + "array/test_array.py::TestSuite": true, + "array/test_array.py::TestSummaryRanges": true, + "array/test_array.py::TestThreeSum": true +} \ No newline at end of file diff --git a/.travis.yml b/.travis.yml new file mode 100644 index 000000000..6f362e353 --- /dev/null +++ b/.travis.yml @@ -0,0 +1,8 @@ +language: python +python: + - "3.6" +cache: pip +install: + - pip install -r requirements.txt +script: + - pytest diff --git a/array/test_array.py b/array/test_array.py index 15a89f0d0..c02a41b0f 100644 --- a/array/test_array.py +++ b/array/test_array.py @@ -1,16 +1,16 @@ -from delete_nth import delete_nth, delete_nth_naive -from flatten import flatten, flatten_iter -from garage import garage -from josephus_problem import josephus -from longest_non_repeat import longest_non_repeat, longest_non_repeat_two -from merge_intervals import Interval, merge_v2 -from missing_ranges import missing_ranges -from move_zeros_to_end import move_zeros -from plus_one import plus_one, plus_one_v2, plus_one_v3 -from rotate_array import rotate_v1, rotate_v2, rotate_v3 -from summary_ranges import summary_ranges -from three_sum import three_sum -from two_sum import two_sum +from array.delete_nth import delete_nth, delete_nth_naive +from array.flatten import flatten, flatten_iter +from array.garage import garage +from array.josephus_problem import josephus +from array.longest_non_repeat import longest_non_repeat, longest_non_repeat_two +from array.merge_intervals import Interval, merge_v2 +from array.missing_ranges import missing_ranges +from array.move_zeros_to_end import move_zeros +from array.plus_one import plus_one, plus_one_v2, plus_one_v3 +from array.rotate_array import rotate_v1, rotate_v2, rotate_v3 +from array.summary_ranges import summary_ranges +from array.three_sum import three_sum +from array.two_sum import two_sum import unittest @@ -274,5 +274,5 @@ def test_two_sum(self): if __name__ == '__main__': - + unittest.main() From a138d938f8864e1dccbf196e684ceeb06caa9df8 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Wed, 11 Apr 2018 00:07:45 +0530 Subject: [PATCH 214/387] update README for pytest (now we can run tests by command pytest) --- README.md | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/README.md b/README.md index e6e4b8ea2..538d13d09 100644 --- a/README.md +++ b/README.md @@ -11,6 +11,10 @@ Minimal and clean example implementations of data structures and algorithms in P Thanks for your interest in contributing! There are many ways to contribute to this project. [Get started here](CONTRIBUTING.md) +## Tests +To run the tests, clone the repo and run : + ```pytest``` + ## List of Implementations - [array](array) From 92b361233810723fa60c22d99a28b9a79d2ded33 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Wed, 11 Apr 2018 00:32:40 +0530 Subject: [PATCH 215/387] some refactor --- backtrack/anagram.py | 23 ++++++++++++++++------- backtrack/combination_sum.py | 4 +++- backtrack/expression_add_operators.py | 5 +++-- backtrack/factor_combinations.py | 12 +++++++----- map/longest_common_subsequence.py | 6 +++--- 5 files changed, 32 insertions(+), 18 deletions(-) diff --git a/backtrack/anagram.py b/backtrack/anagram.py index 84cdb7ac3..862140fc1 100644 --- a/backtrack/anagram.py +++ b/backtrack/anagram.py @@ -11,6 +11,7 @@ def all_perms_iter(elements): for i in range(len(elements)): yield perm[:i] + elements[0:1] + perm[i:] + def all_perms(elements): """ returns a list with the permuations. @@ -24,26 +25,34 @@ def all_perms(elements): tmp.append(perm[:i] + elements[0:1] + perm[i:]) return tmp -def anagram(s1,s2): - c1 = [0]*26 - c2 = [0]*26 - for i in range(len(s1)): - pos = ord(s1[i])-ord('a') + +def anagram(s1, s2): + c1 = [0] * 26 + c2 = [0] * 26 + + for c in s1: + pos = ord(c)-ord('a') c1[pos] = c1[pos] + 1 - for i in range(len(s2)): - pos = ord(s2[i])-ord('a') + + for c in s2: + pos = ord(c)-ord('a') c2[pos] = c2[pos] + 1 + return c1 == c2 + class TestSuite (unittest.TestCase): + def test_all_perms(self): perms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba'] self.assertEqual(perms, all_perms("abc")) + def test_all_perms_iter(self): it = all_perms_iter("abc") perms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba'] for i in range(len(perms)): self.assertEqual(perms[i], next(it)) + def test_angram(self): self.assertTrue(anagram('apple', 'pleap')) self.assertFalse(anagram("apple", "cherry")) diff --git a/backtrack/combination_sum.py b/backtrack/combination_sum.py index 3ac87b6e9..8c6747681 100644 --- a/backtrack/combination_sum.py +++ b/backtrack/combination_sum.py @@ -15,12 +15,14 @@ ] """ -def combinationSum(self, candidates, target): + +def combination_sum(self, candidates, target): res = [] candidates.sort() self.dfs(candidates, target, 0, [], res) return res + def dfs(self, nums, target, index, path, res): if target < 0: return # backtracking diff --git a/backtrack/expression_add_operators.py b/backtrack/expression_add_operators.py index 2e1f45067..f8f520f9c 100644 --- a/backtrack/expression_add_operators.py +++ b/backtrack/expression_add_operators.py @@ -22,13 +22,14 @@ def add_operator(num, target): helper(res, "", num, target, 0, 0, 0) return res + def helper(res, path, num, target, pos, prev, multed): if pos == len(num): - if (target == prev): + if target == prev: res.append(path) return for i in range(pos, len(num)): - if i != pos and num[pos] == '0': # all digits have to be used + if i != pos and num[pos] == '0': # all digits have to be used break cur = int(num[pos:i+1]) if pos == 0: diff --git a/backtrack/factor_combinations.py b/backtrack/factor_combinations.py index 8bfbdce2d..d4de7288f 100644 --- a/backtrack/factor_combinations.py +++ b/backtrack/factor_combinations.py @@ -34,22 +34,23 @@ ] """ -# Iterative: -def getFactors(self, n): +# Iterative: +def get_factors(n): todo, combis = [(n, 2, [])], [] while todo: n, i, combi = todo.pop() while i * i <= n: if n % i == 0: - combis.append(combi + [i, n//i]), - todo.append( [n // i, i, combi+[i] ] ) # python3: n // i + combis.append(combi + [i, n//i]) + todo.append((n//i, i, combi+[i])) i += 1 return combis + # Recursive: +def get_factors_recur(n): -def getFactors(self, n): def factor(n, i, combi, combis): while i * i <= n: if n % i == 0: @@ -57,4 +58,5 @@ def factor(n, i, combi, combis): factor(n//i, i, combi+[i], combis) i += 1 return combis + return factor(n, 2, [], []) diff --git a/map/longest_common_subsequence.py b/map/longest_common_subsequence.py index 247b238e1..631b19d0e 100644 --- a/map/longest_common_subsequence.py +++ b/map/longest_common_subsequence.py @@ -1,14 +1,14 @@ """ Given string a and b, with b containing all distinct characters, -find the longest common subsequence's +find the longest common sub sequence's length. -length. Expected complexity O(nlogn). +Expected complexity O(n logn). """ def max_common_sub_string(s1, s2): # Assuming s2 has all unique chars - s2dic = {s2[i]: i for i in xrange(len(s2))} + s2dic = {s2[i]: i for i in range(len(s2))} maxr = 0 subs = '' i = 0 From 18cde0c099bd8af04073402062a905502de839e2 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Wed, 11 Apr 2018 00:38:26 +0530 Subject: [PATCH 216/387] add requirements.txt --- requirements.txt | 0 1 file changed, 0 insertions(+), 0 deletions(-) create mode 100644 requirements.txt diff --git a/requirements.txt b/requirements.txt new file mode 100644 index 000000000..e69de29bb From 8cc1740d560538fd9494617164ebea5256e3c246 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Wed, 11 Apr 2018 11:37:53 +0530 Subject: [PATCH 217/387] add .cache to .gitignore --- .gitignore | 1 + 1 file changed, 1 insertion(+) diff --git a/.gitignore b/.gitignore index 060f62cab..eb2aa3a69 100755 --- a/.gitignore +++ b/.gitignore @@ -1,3 +1,4 @@ __pycache__/ *.py[cod] .idea/ +.cache/ From d47fe907bb4db803016553f4d11bc5368913fc67 Mon Sep 17 00:00:00 2001 From: Keon Date: Wed, 11 Apr 2018 07:55:47 -0400 Subject: [PATCH 218/387] Update Maintainers List add @SaadBenn and @danghai --- README.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/README.md b/README.md index 538d13d09..17121b29f 100644 --- a/README.md +++ b/README.md @@ -259,6 +259,8 @@ The repo is maintained by * [Rahul Goswami](https://github.com/goswami-rahul) * [Christian Bender](https://github.com/christianbender) * [Ankit Agarwal](https://github.com/ankit167) +* [Hai Hoang Dang](https://github.com/danghai) +* [Sa'd](https://github.com/SaadBenn) And thanks to [all the contributors](https://github.com/keon/algorithms/graphs/contributors) who helped in building the repo. From 8b40ed487ac0f24469d96098bd8556a3235e7db5 Mon Sep 17 00:00:00 2001 From: Keon Date: Wed, 11 Apr 2018 07:56:43 -0400 Subject: [PATCH 219/387] Delete lastfailed --- .cache/v/cache/lastfailed | 15 --------------- 1 file changed, 15 deletions(-) delete mode 100644 .cache/v/cache/lastfailed diff --git a/.cache/v/cache/lastfailed b/.cache/v/cache/lastfailed deleted file mode 100644 index 52d1b51a6..000000000 --- a/.cache/v/cache/lastfailed +++ /dev/null @@ -1,15 +0,0 @@ -{ - "array/test_array.py::TestDeleteNth": true, - "array/test_array.py::TestFlatten": true, - "array/test_array.py::TestGarage": true, - "array/test_array.py::TestJosephus": true, - "array/test_array.py::TestLongestNonRepeat": true, - "array/test_array.py::TestMergeInterval": true, - "array/test_array.py::TestMissingRanges": true, - "array/test_array.py::TestMoveZeros": true, - "array/test_array.py::TestPlusOne": true, - "array/test_array.py::TestRotateArray": true, - "array/test_array.py::TestSuite": true, - "array/test_array.py::TestSummaryRanges": true, - "array/test_array.py::TestThreeSum": true -} \ No newline at end of file From 3bec61ff69fc8cdcc84f9c029ad560d1ea4fbcd8 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Wed, 11 Apr 2018 18:49:48 +0530 Subject: [PATCH 220/387] fixing errors and some refactoring --- dp/coin_change.py | 5 +- dp/regex_matching.py | 1 + graph/checkDiGraphStronglyConnected.py | 2 +- graph/clone_graph.py | 40 +++++++------- maths/summing_digits.py | 12 ++--- sort/selection_sort.py | 6 ++- stack/longest_abs_path.py | 2 +- strings/merge_string_checker.py | 16 +++--- tree/bst/BSTIterator.py | 2 +- tree/bst/array2bst.py | 14 ++--- tree/bst/serialize_deserialize.py | 7 +++ tree/is_subtree.py | 72 ++++++++++++++------------ tree/longest_consecutive.py | 60 +++++++++++---------- tree/max_path_sum.py | 13 ++--- tree/trie/trie.py | 4 ++ 15 files changed, 143 insertions(+), 113 deletions(-) diff --git a/dp/coin_change.py b/dp/coin_change.py index e621fff61..6410f5b57 100644 --- a/dp/coin_change.py +++ b/dp/coin_change.py @@ -36,12 +36,13 @@ def count(S, n): return table[n][m-1] + if __name__ == '__main__': coins = [1, 2, 3] n = 4 - assert count(S, n) == 4 + assert count(coins, n) == 4 coins = [2, 5, 3, 6] n = 10 - assert count(S, n) == 5 + assert count(coins, n) == 5 diff --git a/dp/regex_matching.py b/dp/regex_matching.py index 19ce37a2c..e8449d401 100644 --- a/dp/regex_matching.py +++ b/dp/regex_matching.py @@ -18,6 +18,7 @@ isMatch("ab", ".*") → true isMatch("aab", "c*a*b") → true """ +import unittest class Solution(object): def isMatch(self, s, p): diff --git a/graph/checkDiGraphStronglyConnected.py b/graph/checkDiGraphStronglyConnected.py index 5ec8f510d..25ae80cd2 100644 --- a/graph/checkDiGraphStronglyConnected.py +++ b/graph/checkDiGraphStronglyConnected.py @@ -2,7 +2,7 @@ class Graph: def __init__(self,v): - self.v = v; + self.v = v self.graph = defaultdict(list) def add_edge(self,u,v): diff --git a/graph/clone_graph.py b/graph/clone_graph.py index d2af1def6..d3efc6907 100644 --- a/graph/clone_graph.py +++ b/graph/clone_graph.py @@ -26,52 +26,54 @@ / \ \_/ """ +import collections # Definition for a undirected graph node -# class UndirectedGraphNode: -# def __init__(self, x): -# self.label = x -# self.neighbors = [] +class UndirectedGraphNode: + def __init__(self, x): + self.label = x + self.neighbors = [] # BFS -def cloneGraph1(self, node): +def clone_graph1(node): if not node: return - nodeCopy = UndirectedGraphNode(node.label) - dic = {node: nodeCopy} + node_copy = UndirectedGraphNode(node.label) + dic = {node: node_copy} queue = collections.deque([node]) while queue: node = queue.popleft() for neighbor in node.neighbors: - if neighbor not in dic: # neighbor is not visited - neighborCopy = UndirectedGraphNode(neighbor.label) - dic[neighbor] = neighborCopy - dic[node].neighbors.append(neighborCopy) + if neighbor not in dic: # neighbor is not visited + neighbor_copy = UndirectedGraphNode(neighbor.label) + dic[neighbor] = neighbor_copy + dic[node].neighbors.append(neighbor_copy) queue.append(neighbor) else: dic[node].neighbors.append(dic[neighbor]) - return nodeCopy + return node_copy + # DFS iteratively -def cloneGraph2(self, node): +def clone_graph2(node): if not node: return - nodeCopy = UndirectedGraphNode(node.label) - dic = {node: nodeCopy} + node_copy = UndirectedGraphNode(node.label) + dic = {node: node_copy} stack = [node] while stack: node = stack.pop() for neighbor in node.neighbors: if neighbor not in dic: - neighborCopy = UndirectedGraphNode(neighbor.label) - dic[neighbor] = neighborCopy - dic[node].neighbors.append(neighborCopy) + neighbor_copy = UndirectedGraphNode(neighbor.label) + dic[neighbor] = neighbor_copy + dic[node].neighbors.append(neighbor_copy) stack.append(neighbor) else: dic[node].neighbors.append(dic[neighbor]) - return nodeCopy + return node_copy # DFS recursively def cloneGraph(self, node): diff --git a/maths/summing_digits.py b/maths/summing_digits.py index 8914a8dfd..3f4e21a32 100644 --- a/maths/summing_digits.py +++ b/maths/summing_digits.py @@ -15,19 +15,19 @@ def sum_dig_pow(a, b): for number in range(a, b + 1): exponent = 1 # set to 1 sum = 0 # set to 1 - number_as_string = str(i) + number_as_string = str(number) - tokens = list(map(int, number_as_string)) # parse the string into individual digits + tokens = list(map(int, number_as_string)) # parse the string into individual digits for k in tokens: sum = sum + (k ** exponent) - exponent +=1 + exponent += 1 if sum == number: result.append(number) return result -# Some test cases: -sum_dig_pow(1, 10) == [1, 2, 3, 4, 5, 6, 7, 8, 9] -sum_dig_pow(1, 100) == [1, 2, 3, 4, 5, 6, 7, 8, 9, 89] +# Some test cases: +assert sum_dig_pow(1, 10) == [1, 2, 3, 4, 5, 6, 7, 8, 9] +assert sum_dig_pow(1, 100) == [1, 2, 3, 4, 5, 6, 7, 8, 9, 89] diff --git a/sort/selection_sort.py b/sort/selection_sort.py index c3e01e536..18e1aa783 100644 --- a/sort/selection_sort.py +++ b/sort/selection_sort.py @@ -1,4 +1,6 @@ import unittest + + def selection_sort(arr): """ Selection Sort Complexity: O(n^2) @@ -9,7 +11,7 @@ def selection_sort(arr): # "Select" the correct value if arr[j] < arr[minimum]: minimum = j - # Using a pythonic swap + arr[minimum], arr[i] = arr[i], arr[minimum] return arr @@ -23,5 +25,5 @@ def test_selection_sort(self): selection_sort([1, 5, 65, 23, 57, 1232])) -if_name__ == "__main__": +if __name__ == "__main__": unittest.main() diff --git a/stack/longest_abs_path.py b/stack/longest_abs_path.py index f7627f5aa..64c7a67af 100644 --- a/stack/longest_abs_path.py +++ b/stack/longest_abs_path.py @@ -61,5 +61,5 @@ def length_longest_path(input): st2 = "a\n\tb1\n\t\tf1.txt\n\taaaaa\n\t\tf2.txt" print("path:", st2) -print("answer:", lengthLongestPath(st2)) +print("answer:", length_longest_path(st2)) diff --git a/strings/merge_string_checker.py b/strings/merge_string_checker.py index 0135f7e4c..bc252e724 100644 --- a/strings/merge_string_checker.py +++ b/strings/merge_string_checker.py @@ -8,20 +8,22 @@ part2: o e a r s = oears """ + # Recursive Solution def is_merge_recursive(s, part1, part2): if not part1: - return s == part2 + return s == part2 if not part2: - return s == part1 + return s == part1 if not s: - return part1 + part2 == '' - if s[0] == part1[0] and is_merge(s[1:], part1[1:], part2): - return True - if s[0] == part2[0] and is_merge(s[1:], part1, part2[1:]): - return True + return part1 + part2 == '' + if s[0] == part1[0] and is_merge_recursive(s[1:], part1[1:], part2): + return True + if s[0] == part2[0] and is_merge_recursive(s[1:], part1, part2[1:]): + return True return False + # An iterative approach def is_merge_iterative(s, part1, part2): tuple_list = [(s, part1, part2)] diff --git a/tree/bst/BSTIterator.py b/tree/bst/BSTIterator.py index a19aecd8a..af8a68d77 100644 --- a/tree/bst/BSTIterator.py +++ b/tree/bst/BSTIterator.py @@ -10,7 +10,7 @@ def has_next(self): return bool(self.stack) def next(self): - node = stack.pop() + node = self.stack.pop() tmp = node if tmp.right: tmp = tmp.right diff --git a/tree/bst/array2bst.py b/tree/bst/array2bst.py index cc147eac2..62fe5b9b7 100644 --- a/tree/bst/array2bst.py +++ b/tree/bst/array2bst.py @@ -2,18 +2,20 @@ Given an array where elements are sorted in ascending order, convert it to a height balanced BST. """ -# class TreeNode(object): -# def __init__(self, x): -# self.val = x -# self.left = None -# self.right = None + + +class TreeNode(object): + def __init__(self, x): + self.val = x + self.left = None + self.right = None def array2bst(nums): if not nums: return None mid = len(nums)//2 - node = Node(nums[mid]) + node = TreeNode(nums[mid]) node.left = array2bst(nums[:mid]) node.right = array2bst(nums[mid+1:]) return node diff --git a/tree/bst/serialize_deserialize.py b/tree/bst/serialize_deserialize.py index 602e2222d..20f911220 100644 --- a/tree/bst/serialize_deserialize.py +++ b/tree/bst/serialize_deserialize.py @@ -1,5 +1,12 @@ +class TreeNode(object): + def __init__(self, x): + self.val = x + self.left = None + self.right = None + + def serialize(root): def build_string(node): if node: diff --git a/tree/is_subtree.py b/tree/is_subtree.py index 9a6c91f95..844b0d5f7 100644 --- a/tree/is_subtree.py +++ b/tree/is_subtree.py @@ -1,48 +1,51 @@ -# Given two binary trees s and t, check if t is a subtree of s. -# A subtree of a tree t is a tree consisting of a node in t and -# all of its descendants in t. +""" +Given two binary trees s and t, check if t is a subtree of s. +A subtree of a tree t is a tree consisting of a node in t and +all of its descendants in t. -# Example 1: +Example 1: -# Given s: +Given s: - # 3 - # / \ - # 4 5 - # / \ - # 1 2 + 3 + / \ + 4 5 + / \ + 1 2 -# Given t: +Given t: - # 4 - # / \ - # 1 2 -# Return true, because t is a subtree of s. + 4 + / \ + 1 2 +Return true, because t is a subtree of s. -# Example 2: +Example 2: -# Given s: +Given s: - # 3 - # / \ - # 4 5 - # / \ - # 1 2 - # / - # 0 + 3 + / \ + 4 5 + / \ + 1 2 + / + 0 -# Given t: +Given t: - # 3 - # / - # 4 - # / \ - # 1 2 -# Return false, because even though t is part of s, -# it does not contain all descendants of t. + 3 + / + 4 + / \ + 1 2 +Return false, because even though t is part of s, +it does not contain all descendants of t. -# Follow up: -# What if one tree is significantly lager than the other? +Follow up: +What if one tree is significantly lager than the other? +""" +import collections def is_subtree(big, small): @@ -59,6 +62,7 @@ def is_subtree(big, small): queue.append(node.right) return flag + def comp(p, q): if not p and not q: return True diff --git a/tree/longest_consecutive.py b/tree/longest_consecutive.py index 498aaa6ca..3b1947fa8 100644 --- a/tree/longest_consecutive.py +++ b/tree/longest_consecutive.py @@ -1,45 +1,49 @@ -# Given a binary tree, find the length of the longest consecutive sequence path. +""" +Given a binary tree, find the length of the longest consecutive sequence path. -# The path refers to any sequence of nodes from some starting node to any node -# in the tree along the parent-child connections. -# The longest consecutive path need to be from parent to child -# (cannot be the reverse). +The path refers to any sequence of nodes from some starting node to any node +in the tree along the parent-child connections. +The longest consecutive path need to be from parent to child +(cannot be the reverse). -# For example, - # 1 - # \ - # 3 - # / \ - # 2 4 - # \ - # 5 -# Longest consecutive sequence path is 3-4-5, so return 3. - # 2 - # \ - # 3 - # / - # 2 - # / - # 1 +For example, + 1 + \ + 3 + / \ + 2 4 + \ + 5 +Longest consecutive sequence path is 3-4-5, so return 3. + 2 + \ + 3 + / + 2 + / + 1 +""" -maxlen = 0 -def longestConsecutive(root): +def longest_consecutive(root): """ :type root: TreeNode :rtype: int """ if not root: return 0 - DFS(root, 0, root.val) + maxlen = 0 + DFS(root, 0, root.val, maxlen) return maxlen -def DFS(root, cur, target): - if not root: return + +def DFS(root, cur, target, maxlen): + if not root: + return if root.val == target: cur += 1 else: cur = 1 maxlen = max(cur, maxlen) - DFS(root.left, cur, root.val+1) - DFS(root.right, cur, root.val+1) + DFS(root.left, cur, root.val+1, maxlen) + DFS(root.right, cur, root.val+1, maxlen) diff --git a/tree/max_path_sum.py b/tree/max_path_sum.py index 48c3e3fbf..10559b52a 100644 --- a/tree/max_path_sum.py +++ b/tree/max_path_sum.py @@ -1,14 +1,15 @@ -maximum = float("-inf") def max_path_sum(root): - helper(root) + maximum = float("-inf") + helper(root, maximum) return maximum -def helper(root): + +def helper(root, maximum): if not root: return 0 - left = helper(root.left) - right = helper(root.right) + left = helper(root.left, maximum) + right = helper(root.right, maximum) maximum = max(maximum, left+right+root.val) - return root.val + max(left, right) + return root.val + maximum diff --git a/tree/trie/trie.py b/tree/trie/trie.py index adfd9d0a8..19f35f1a8 100644 --- a/tree/trie/trie.py +++ b/tree/trie/trie.py @@ -4,11 +4,15 @@ Note: You may assume that all inputs are consist of lowercase letters a-z. """ +import collections + + class TrieNode: def __init__(self): self.children = collections.defaultdict(TrieNode) self.is_word = False + class Trie: def __init__(self): self.root = TrieNode() From fddd3baec9a9806d8f5edc2e3aabd168c2866218 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Wed, 11 Apr 2018 18:55:04 +0530 Subject: [PATCH 221/387] fixed all errors :) --- array/merge_intervals.py | 2 +- graph/clone_graph.py | 22 ++++++------ linkedlist/copy_random_pointer.py | 58 +++++++++++++++---------------- linkedlist/reverse.py | 2 +- 4 files changed, 43 insertions(+), 41 deletions(-) diff --git a/array/merge_intervals.py b/array/merge_intervals.py index c657bb838..606ca3427 100644 --- a/array/merge_intervals.py +++ b/array/merge_intervals.py @@ -15,7 +15,7 @@ def __init__(self, start=0, end=0): self.end = end def __repr__(self): - return f"Interval ({self.start}, {self.end})" + return "Interval ({}, {})".format(self.start, self.end) def __iter__(self): return iter(range(self.start, self.end)) diff --git a/graph/clone_graph.py b/graph/clone_graph.py index d3efc6907..0fbae1d43 100644 --- a/graph/clone_graph.py +++ b/graph/clone_graph.py @@ -75,21 +75,23 @@ def clone_graph2(node): dic[node].neighbors.append(dic[neighbor]) return node_copy + # DFS recursively -def cloneGraph(self, node): +def clone_graph(node): if not node: return - nodeCopy = UndirectedGraphNode(node.label) - dic = {node: nodeCopy} - self.dfs(node, dic) - return nodeCopy + node_copy = UndirectedGraphNode(node.label) + dic = {node: node_copy} + dfs(node, dic) + return node_copy + -def dfs(self, node, dic): +def dfs(node, dic): for neighbor in node.neighbors: if neighbor not in dic: - neighborCopy = UndirectedGraphNode(neighbor.label) - dic[neighbor] = neighborCopy - dic[node].neighbors.append(neighborCopy) - self.dfs(neighbor, dic) + neighbor_copy = UndirectedGraphNode(neighbor.label) + dic[neighbor] = neighbor_copy + dic[node].neighbors.append(neighbor_copy) + dfs(neighbor, dic) else: dic[node].neighbors.append(dic[neighbor]) diff --git a/linkedlist/copy_random_pointer.py b/linkedlist/copy_random_pointer.py index 663eabb96..7653d4902 100644 --- a/linkedlist/copy_random_pointer.py +++ b/linkedlist/copy_random_pointer.py @@ -4,35 +4,35 @@ Return a deep copy of the list. """ -from collections import defaultdict +# from collections import defaultdict - -class Solution0: - # @param head, a RandomListNode - # @return a RandomListNode - def copyRandomList(self, head): - dic = dict() - m = n = head - while m: - dic[m] = RandomListNode(m.label) - m = m.next - while n: - dic[n].next = dic.get(n.next) - dic[n].random = dic.get(n.random) - n = n.next - return dic.get(head) - - -class Solution1: # O(n) +# TODO: This requires to be rewritten -- commenting it out for now +# class Solution0: # @param head, a RandomListNode # @return a RandomListNode - def copyRandomList(self, head): - copy = defaultdict(lambda: RandomListNode(0)) - copy[None] = None - node = head - while node: - copy[node].label = node.label - copy[node].next = copy[node.next] - copy[node].random = copy[node.random] - node = node.next - return copy[head] + # def copyRandomList(self, head): + # dic = dict() + # m = n = head + # while m: + # dic[m] = RandomListNode(m.label) + # m = m.next + # while n: + # dic[n].next = dic.get(n.next) + # dic[n].random = dic.get(n.random) + # n = n.next + # return dic.get(head) +# +# +# class Solution1: # O(n) +# @param head, a RandomListNode +# @return a RandomListNode + # def copyRandomList(self, head): + # copy = defaultdict(lambda: RandomListNode(0)) + # copy[None] = None + # node = head + # while node: + # copy[node].label = node.label + # copy[node].next = copy[node.next] + # copy[node].random = copy[node.random] + # node = node.next + # return copy[head] diff --git a/linkedlist/reverse.py b/linkedlist/reverse.py index dcc77cb0c..93b40f42f 100644 --- a/linkedlist/reverse.py +++ b/linkedlist/reverse.py @@ -36,6 +36,6 @@ def reverse_list_recursive(head): return head p = head.next head.next = None - revrest = self.reverse(p) + revrest = reverse_list_recursive(p) p.next = head return revrest From 85ea0b99caf7dffb1e8bcb7d94bc626679890c3e Mon Sep 17 00:00:00 2001 From: Saad Date: Wed, 11 Apr 2018 19:36:52 -0500 Subject: [PATCH 222/387] Add domain_extractor.py --- strings/domain_extractor.py | 42 +++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 strings/domain_extractor.py diff --git a/strings/domain_extractor.py b/strings/domain_extractor.py new file mode 100644 index 000000000..dcfba0f8c --- /dev/null +++ b/strings/domain_extractor.py @@ -0,0 +1,42 @@ +""" +Write a function that when given a URL as a string, parses out just the domain name and returns it as a string. + +Examples: +domain_name("http://github.com/SaadBenn") == "github" +domain_name("http://www.zombie-bites.com") == "zombie-bites" +domain_name("https://www.cnet.com") == "cnet" + +Note: The idea is not to use any built-in libraries such as re (regular expression) or urlparse except .split() built-in function +""" + +# Non pythonic way +def domain_name(url): + #grab only the non http(s) part + full_domain_name = url.split('//')[-1] + #grab the actual one depending on the len of the list + actual_domain = full_domain_name.split('.') + + # case when www is in the url + if (len(actual_domain) > 2): + return actual_domain[1] + # case when www is not in the url + return actual_domain[0] + + +# pythonic one liner +def domain_name(url): + return url.split("//")[-1].split("www.")[-1].split(".")[0] + + +import unittest +class TestSuite(unittest.TestCase): + + def test_valid(self): + self.assertEqual(domain_name("https://github.com/SaadBenn"), "github") + + def test_invalid(self): + self.assertEqual(domain_name("http://google.com"), "http") + + +if __name__ == "__main__": + unittest.main() From 62a13f2f7322648ace59ec7e19db0d2bfa5002b9 Mon Sep 17 00:00:00 2001 From: Sa'd Date: Wed, 11 Apr 2018 19:38:57 -0500 Subject: [PATCH 223/387] Update README.md --- README.md | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 17121b29f..fcafc2fa2 100644 --- a/README.md +++ b/README.md @@ -186,6 +186,7 @@ To run the tests, clone the repo and run : - [remove_min](stack/remove_min.py) - [is_sorted](stack/is_sorted.py) - [strings](strings) + - [domain_extractor](strings/domain_extractor.py) - [merge_string_checker](strings/merge_string_checker.py) - [add_binary](strings/add_binary.py) - [breaking_bad](strings/breaking_bad.py) @@ -260,7 +261,7 @@ The repo is maintained by * [Christian Bender](https://github.com/christianbender) * [Ankit Agarwal](https://github.com/ankit167) * [Hai Hoang Dang](https://github.com/danghai) -* [Sa'd](https://github.com/SaadBenn) +* [Saad](https://github.com/SaadBenn) And thanks to [all the contributors](https://github.com/keon/algorithms/graphs/contributors) who helped in building the repo. From 04703e4d7e91522093d05fef91ec63ec63c17e7f Mon Sep 17 00:00:00 2001 From: Saad Date: Wed, 11 Apr 2018 19:45:03 -0500 Subject: [PATCH 224/387] Add sudoku_validator.py --- matrix/sudoku_validator.py | 113 +++++++++++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 matrix/sudoku_validator.py diff --git a/matrix/sudoku_validator.py b/matrix/sudoku_validator.py new file mode 100644 index 000000000..b3a6adfc6 --- /dev/null +++ b/matrix/sudoku_validator.py @@ -0,0 +1,113 @@ +""" +Write a function validSolution/ValidateSolution/valid_solution() that accepts a 2D array representing a Sudoku board, and returns true if it is a valid solution, or false otherwise. The cells of the sudoku board may also contain 0's, which will represent empty cells. Boards containing one or more zeroes are considered to be invalid solutions. +The board is always 9 cells by 9 cells, and every cell only contains integers from 0 to 9. + +(More info at: http://en.wikipedia.org/wiki/Sudoku) +""" + +# Using dict/hash-table +from collections import defaultdict +def valid_solution_hashtable(board): + for i in range(len(board)): + dict_row = defaultdict(int) + dict_col = defaultdict(int) + for j in range(len(board[0])): + value_row = board[i][j] + value_col = board[j][i] + if not value_row or value_col == 0: + return False + if value_row in dict_row: + return False + else: + dict_row[value_row] += 1 + + if value_col in dict_col: + return False + else: + dict_col[value_col] += 1 + + for i in range(3): + for j in range(3): + grid_add = 0 + for k in range(3): + for l in range(3): + grid_add += board[i*3+k][j*3+l] + if grid_add != 45: + return False + return True + + +# Without hash-table/dict +def valid_solution(board): + correct = [1, 2, 3, 4, 5, 6, 7, 8, 9] + # check rows + for row in board: + if sorted(row) != correct: + return False + + # check columns + for column in zip(*board): + if sorted(column) != correct: + return False + + # check regions + for i in range(3): + for j in range(3): + region = [] + for line in board[i*3:(i+1)*3]: + region += line[j*3:(j+1)*3] + + if sorted(region) != correct: + return False + + # if everything correct + return True + + +# Using set +def valid_solution_set (board): + valid = set(range(1, 10)) + + for row in board: + if set(row) != valid: + return False + + for col in [[row[i] for row in board] for i in range(9)]: + if set(col) != valid: + return False + + for x in range(3): + for y in range(3): + if set(sum([row[x*3:(x+1)*3] for row in board[y*3:(y+1)*3]], [])) != valid: + return False + + return True + +# test cases +# To avoid congestion I'll leave testing all the functions to the reader. Just change the name of the function in the below test cases. +import unittest +class TestSuite(unittest.TestCase): + def test_valid(self): + self.assertTrue(valid_solution([[5, 3, 4, 6, 7, 8, 9, 1, 2], + [6, 7, 2, 1, 9, 5, 3, 4, 8], + [1, 9, 8, 3, 4, 2, 5, 6, 7], + [8, 5, 9, 7, 6, 1, 4, 2, 3], + [4, 2, 6, 8, 5, 3, 7, 9, 1], + [7, 1, 3, 9, 2, 4, 8, 5, 6], + [9, 6, 1, 5, 3, 7, 2, 8, 4], + [2, 8, 7, 4, 1, 9, 6, 3, 5], + [3, 4, 5, 2, 8, 6, 1, 7, 9]]) + + def test_invalid(self): + self.assertFalse(valid_solution([[5, 3, 4, 6, 7, 8, 9, 1, 2], + [6, 7, 2, 1, 9, 0, 3, 4, 9], + [1, 0, 0, 3, 4, 2, 5, 6, 0], + [8, 5, 9, 7, 6, 1, 0, 2, 0], + [4, 2, 6, 8, 5, 3, 7, 9, 1], + [7, 1, 3, 9, 2, 4, 8, 5, 6], + [9, 0, 1, 5, 3, 7, 2, 1, 4], + [2, 8, 7, 4, 1, 9, 6, 3, 5], + [3, 0, 0, 4, 8, 1, 1, 7, 9]]) + +if __name__ == "__main__": + unittest.main() From 852a151673ddb2f182f522241250637a971a0136 Mon Sep 17 00:00:00 2001 From: Sa'd Date: Wed, 11 Apr 2018 20:02:06 -0500 Subject: [PATCH 225/387] Update README.md Add sudoku_validator to the content table. --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index fcafc2fa2..96fded240 100644 --- a/README.md +++ b/README.md @@ -140,6 +140,7 @@ To run the tests, clone the repo and run : - [sqrt_precision_factor](maths/sqrt_precision_factor.py) - [summing_digits](maths/summing_digits.py) - [matrix](matrix) + - [sudoku_validator](matrix/sudoku_validator.py) - [bomb_enemy](matrix/bomb_enemy.py) - [copy_transform](matrix/copy_transform.py) - [count_paths](matrix/count_paths.py) From 3cf2cf849273cceaf1c03fa60a71b6a9c92943db Mon Sep 17 00:00:00 2001 From: danghai Date: Thu, 12 Apr 2018 18:56:21 -0700 Subject: [PATCH 226/387] Fix missing close parentheses --- matrix/sudoku_validator.py | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/matrix/sudoku_validator.py b/matrix/sudoku_validator.py index b3a6adfc6..ad2faebeb 100644 --- a/matrix/sudoku_validator.py +++ b/matrix/sudoku_validator.py @@ -33,7 +33,7 @@ def valid_solution_hashtable(board): for l in range(3): grid_add += board[i*3+k][j*3+l] if grid_add != 45: - return False + return False return True @@ -44,22 +44,22 @@ def valid_solution(board): for row in board: if sorted(row) != correct: return False - + # check columns for column in zip(*board): if sorted(column) != correct: return False - + # check regions for i in range(3): for j in range(3): region = [] for line in board[i*3:(i+1)*3]: region += line[j*3:(j+1)*3] - + if sorted(region) != correct: return False - + # if everything correct return True @@ -67,20 +67,20 @@ def valid_solution(board): # Using set def valid_solution_set (board): valid = set(range(1, 10)) - + for row in board: - if set(row) != valid: + if set(row) != valid: return False - + for col in [[row[i] for row in board] for i in range(9)]: - if set(col) != valid: + if set(col) != valid: return False - + for x in range(3): for y in range(3): if set(sum([row[x*3:(x+1)*3] for row in board[y*3:(y+1)*3]], [])) != valid: return False - + return True # test cases @@ -88,7 +88,7 @@ def valid_solution_set (board): import unittest class TestSuite(unittest.TestCase): def test_valid(self): - self.assertTrue(valid_solution([[5, 3, 4, 6, 7, 8, 9, 1, 2], + self.assertTrue(valid_solution([[5, 3, 4, 6, 7, 8, 9, 1, 2], [6, 7, 2, 1, 9, 5, 3, 4, 8], [1, 9, 8, 3, 4, 2, 5, 6, 7], [8, 5, 9, 7, 6, 1, 4, 2, 3], @@ -96,10 +96,10 @@ def test_valid(self): [7, 1, 3, 9, 2, 4, 8, 5, 6], [9, 6, 1, 5, 3, 7, 2, 8, 4], [2, 8, 7, 4, 1, 9, 6, 3, 5], - [3, 4, 5, 2, 8, 6, 1, 7, 9]]) - + [3, 4, 5, 2, 8, 6, 1, 7, 9]])) + def test_invalid(self): - self.assertFalse(valid_solution([[5, 3, 4, 6, 7, 8, 9, 1, 2], + self.assertFalse(valid_solution([[5, 3, 4, 6, 7, 8, 9, 1, 2], [6, 7, 2, 1, 9, 0, 3, 4, 9], [1, 0, 0, 3, 4, 2, 5, 6, 0], [8, 5, 9, 7, 6, 1, 0, 2, 0], @@ -107,7 +107,7 @@ def test_invalid(self): [7, 1, 3, 9, 2, 4, 8, 5, 6], [9, 0, 1, 5, 3, 7, 2, 1, 4], [2, 8, 7, 4, 1, 9, 6, 3, 5], - [3, 0, 0, 4, 8, 1, 1, 7, 9]]) - + [3, 0, 0, 4, 8, 1, 1, 7, 9]])) + if __name__ == "__main__": unittest.main() From 2f0aad79285997dacd0a3c49555be4743d09856d Mon Sep 17 00:00:00 2001 From: danghai Date: Thu, 12 Apr 2018 19:14:30 -0700 Subject: [PATCH 227/387] Add status badges of built to README --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index 96fded240..8097c4d6f 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,7 @@ English | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) +[![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) Pythonic Data Structures and Algorithms ========================================= From 541a3fb4096fbb438dbd99ab3b50620169f3cd10 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Fri, 13 Apr 2018 06:05:38 +0200 Subject: [PATCH 228/387] Test maths (#220) * added test suite for base_conversion.py * added test suite for extended_gcd.py * improved the code of the gcd-function * added test suite for gcd.py * fixed a bug in the function strobogrammaticInRange(...) * removed the print * added test suite for generate_strobogrammatic.py * added variables for the lengths * added test suite for is_strobogrammatic.py * renamed the function find_next_square(...) * added test suite for the file next_perfect_square.py * test for the file primes_sieve_of_eratosthenes.py * test for the file prime_test.py * test for the file pythagoras.py * test for the file rabin_miller.py * added a docstring * fixed my assert * added test for the file rsa.py * added random.seed() in genprime(k) * fixed rsa encryption * fixed rsa.py --- maths/extended_gcd.py | 2 +- maths/gcd.py | 5 +- maths/generate_strobogrammtic.py | 13 +- maths/next_perfect_square.py | 3 +- maths/prime_test.py | 29 +--- maths/primes_sieve_of_eratosthenes.py | 2 +- maths/pythagoras.py | 2 +- maths/rabin_miller.py | 13 +- maths/rsa.py | 35 +++-- maths/test_maths.py | 193 ++++++++++++++++++++++++++ 10 files changed, 242 insertions(+), 55 deletions(-) create mode 100644 maths/test_maths.py diff --git a/maths/extended_gcd.py b/maths/extended_gcd.py index 69ecfa301..96c31ac65 100644 --- a/maths/extended_gcd.py +++ b/maths/extended_gcd.py @@ -17,4 +17,4 @@ def extended_gcd(a,b): old_s, s = s, old_s - quotient * s old_t, t = t, old_t - quotient * t - return old_s, old_t, old_r \ No newline at end of file + return old_s, old_t, old_r diff --git a/maths/gcd.py b/maths/gcd.py index 9792d8faa..1f80fc981 100644 --- a/maths/gcd.py +++ b/maths/gcd.py @@ -2,10 +2,9 @@ def gcd(a, b): """Computes the greatest common divisor of integers a and b using Euclid's Algorithm. """ - while True: - if b == 0: - return a + while b != 0: a, b = b, a % b + return a def lcm(a, b): diff --git a/maths/generate_strobogrammtic.py b/maths/generate_strobogrammtic.py index f5589ac7e..2311dcf50 100644 --- a/maths/generate_strobogrammtic.py +++ b/maths/generate_strobogrammtic.py @@ -14,8 +14,7 @@ def gen_strobogrammatic(n): :type n: int :rtype: List[str] """ - result = helper(n, n) - return result + return helper(n, n) def helper(n, length): @@ -43,19 +42,21 @@ def strobogrammaticInRange(low, high): """ res = [] count = 0 - for i in range(len(low), len(high)+1): + low_len = len(low) + high_len = len(high) + for i in range(low_len, high_len + 1): res.extend(helper2(i, i)) for perm in res: - if len(perm) == len(low) and int(perm) < int(low): + if len(perm) == low_len and int(perm) < int(low): continue - elif len(perm) == len(high) and int(perm) > int(high): + elif len(perm) == high_len and int(perm) > int(high): continue else: count += 1 return count -def helper2(self, n, length): +def helper2(n, length): if n == 0: return [""] if n == 1: diff --git a/maths/next_perfect_square.py b/maths/next_perfect_square.py index dc52ddcd1..7e6e6b918 100644 --- a/maths/next_perfect_square.py +++ b/maths/next_perfect_square.py @@ -13,6 +13,7 @@ def find_next_square(sq): # Another way: -def find_next_square(sq): +def find_next_square2(sq): x = sq**0.5 return -1 if x % 1 else (x+1)**2 + diff --git a/maths/prime_test.py b/maths/prime_test.py index 05a069f34..ba670717f 100644 --- a/maths/prime_test.py +++ b/maths/prime_test.py @@ -1,7 +1,6 @@ """ prime_test(n) returns a True if n is a prime number else it returns False """ -import unittest def prime_test(n): if n <= 1: @@ -34,30 +33,4 @@ def prime_test2(n): # if input number is less than # or equal to 1, it is not prime else: - return False - - -class TestSuite (unittest.TestCase): - def test_prime_test(self): - """ - checks all prime numbers between 2 up to 100. - Between 2 up to 100 exists 25 prime numbers! - """ - counter = 0 - for i in range(2,101): - if prime_test(i): - counter += 1 - self.assertEqual(25,counter) - def test_prime_test2(self): - """ - checks all prime numbers between 2 up to 100. - Between 2 up to 100 exists 25 prime numbers! - """ - counter = 0 - for i in range(2,101): - if prime_test(i): - counter += 1 - self.assertEqual(25,counter) - -if __name__ == "__main__": - unittest.main() \ No newline at end of file + return False \ No newline at end of file diff --git a/maths/primes_sieve_of_eratosthenes.py b/maths/primes_sieve_of_eratosthenes.py index 34289da64..1677b2575 100644 --- a/maths/primes_sieve_of_eratosthenes.py +++ b/maths/primes_sieve_of_eratosthenes.py @@ -31,7 +31,7 @@ def primes(x): primes = [] # List of Primes if x >= 2: primes.append(2) # Add 2 by default - for i in range(0, sieve_size): + for i in range(sieve_size): if sieve[i] == 1: value_at_i = i*2 + 3 primes.append(value_at_i) diff --git a/maths/pythagoras.py b/maths/pythagoras.py index 8effe1349..d89626039 100644 --- a/maths/pythagoras.py +++ b/maths/pythagoras.py @@ -13,4 +13,4 @@ def pythagoras(opposite,adjacent,hypotenuse): else: return "You already know the answer!" except: - print ("Error, check your input. You must know 2 of the 3 variables.") + raise ValueError("invalid argument were given.") diff --git a/maths/rabin_miller.py b/maths/rabin_miller.py index b06db5c68..c8e2921cb 100644 --- a/maths/rabin_miller.py +++ b/maths/rabin_miller.py @@ -8,6 +8,12 @@ def pow2_factor(n): power += 1 return power, n +def pow_3(a, b, c): + """ + helper function for a, b and c integers. + """ + return a**b % c + """ Rabin-Miller primality test returning False implies that n is guarenteed composite @@ -15,6 +21,9 @@ def pow2_factor(n): with a 4 ** -k chance of being wrong """ def is_prime(n, k): + #precondition + assert n >= 5, "the to tested number must been >= 5" + r, d = pow2_factor(n - 1) """ @@ -23,13 +32,13 @@ def is_prime(n, k): an invalid witness guarentees n is composite """ def valid_witness(a): - x = pow(a, d, n) + x = pow(int(a), int(d), int(n)) if x == 1 or x == n - 1: return False for _ in range(r - 1): - x = pow(x, 2, n) + x = pow(int(x), int(2), int(n)) if x == 1: return True diff --git a/maths/rsa.py b/maths/rsa.py index f3b0f6866..5ec1ccc25 100644 --- a/maths/rsa.py +++ b/maths/rsa.py @@ -30,18 +30,22 @@ generate a prime with k bits """ def genprime(k): + random.seed() while True: - n = random.randrange(2 ** (k - 1),2 ** k) + n = random.randrange(int(2 ** (k - 1)),int(2 ** k)) if is_prime(n,128): return n + """ calculate the inverse of a mod m that is, find b such that (a * b) % m == 1 """ def modinv(a, m): - x, y, g = extended_gcd(a,m) - return x % m + b = 1 + while ((a*b) % m != 1): + b += 1 + return b """ the RSA key generating algorithm @@ -68,13 +72,20 @@ def generate_key(k): l = (p - 1) * (q - 1) # calculate totient function d = modinv(e,l) - return n, e, d + return int(n), int(e), int(d) + +def encrypt(data, e, n): + return pow(int(data), int(e), int(n)) + +def decrypt(data, d, n): + return pow(int(data), int(d), int(n)) + + + +#sample usage: +# n,e,d = generate_key(16) +# data = 20 +# encrypted = pow(data,e,n) +# decrypted = pow(encrypted,d,n) +# assert decrypted == data -""" -sample usage: -n,e,d = generate_key(1024) -data = 1337 -encrypted = pow(data,e,n) -decrypted = pow(encrypted,d,n) -assert decrypted == data -""" diff --git a/maths/test_maths.py b/maths/test_maths.py new file mode 100644 index 000000000..ff6cda07d --- /dev/null +++ b/maths/test_maths.py @@ -0,0 +1,193 @@ +from base_conversion import int2base,base2int +from extended_gcd import extended_gcd +from gcd import gcd,lcm +from generate_strobogrammtic import gen_strobogrammatic,strobogrammaticInRange +from is_strobogrammatic import is_strobogrammatic,is_strobogrammatic2 +from next_perfect_square import find_next_square,find_next_square2 +from primes_sieve_of_eratosthenes import primes +from prime_test import prime_test, prime_test2 +from pythagoras import pythagoras +from rabin_miller import is_prime +from rsa import encrypt, decrypt, generate_key + +import unittest + + +class TestBaseConversion(unittest.TestCase): + """ + Test for the file base_conversion.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_int2base(self): + self.assertEqual("101",int2base(5,2)) + self.assertEqual("0",int2base(0,2)) + self.assertEqual("FF",int2base(255,16)) + def test_base2int(self): + self.assertEqual(5,base2int("101",2)) + self.assertEqual(0,base2int("0",2)) + self.assertEqual(255,base2int("FF",16)) + + +class TestExtendedGcd(unittest.TestCase): + """[summary] + Test for the file extended_gcd.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_extended_gcd(self): + self.assertEqual((0,1,2),extended_gcd(8,2)) + self.assertEqual((0,1,17),extended_gcd(13,17)) + + +class TestGcd(unittest.TestCase): + """[summary] + Test for the file gcd.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_gcd(self): + self.assertEqual(4,gcd(8,12)) + self.assertEqual(1,gcd(13,17)) + def test_lcm(self): + self.assertEqual(24,lcm(8,12)) + + +class TestGenerateStroboGrammatic(unittest.TestCase): + """[summary] + Test for the file generate_strobogrammatic.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_gen_strobomatic(self): + self.assertEqual(['88', '11', '96', '69'],gen_strobogrammatic(2)) + def test_strobogrammaticInRange(self): + self.assertEqual(4,strobogrammaticInRange("10","100")) + + +class TestIsStrobogrammatic(unittest.TestCase): + """[summary] + Test for the file is_strobogrammatic.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_is_strobogrammatic(self): + self.assertTrue(is_strobogrammatic("69")) + self.assertFalse(is_strobogrammatic("14")) + def test_is_strobogrammatic2(self): + self.assertTrue(is_strobogrammatic2("69")) + self.assertFalse(is_strobogrammatic2("14")) + + +class TestNextPerfectSquare(unittest.TestCase): + """[summary] + Test for the file next_perfect_square.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_find_next_square(self): + self.assertEqual(36,find_next_square(25)) + self.assertEqual(1,find_next_square(0)) + def test_find_next_square2(self): + self.assertEqual(36,find_next_square2(25)) + self.assertEqual(1,find_next_square2(0)) + + +class TestPrimesSieveOfEratosthenes(unittest.TestCase): + """[summary] + Test for the file primes_sieve_of_eratosthenes.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_primes(self): + self.assertEqual([2, 3, 5, 7],primes(7)) + + +class TestPrimeTest (unittest.TestCase): + """[summary] + Test for the file prime_test.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_prime_test(self): + """ + checks all prime numbers between 2 up to 100. + Between 2 up to 100 exists 25 prime numbers! + """ + counter = 0 + for i in range(2,101): + if prime_test(i): + counter += 1 + self.assertEqual(25,counter) + def test_prime_test2(self): + """ + checks all prime numbers between 2 up to 100. + Between 2 up to 100 exists 25 prime numbers! + """ + counter = 0 + for i in range(2,101): + if prime_test(i): + counter += 1 + self.assertEqual(25,counter) + + +class TestPythagoras(unittest.TestCase): + """[summary] + Test for the file pythagoras.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_pythagoras(self): + self.assertEqual("Hypotenuse = 3.605551275463989",pythagoras(3, 2, "?")) + + +class TestRabinMiller(unittest.TestCase): + """[summary] + Test for the file rabin_miller.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_is_prime(self): + self.assertTrue(is_prime(7,2)) + self.assertTrue(is_prime(13,11)) + self.assertFalse(is_prime(6,2)) + + +class TestRSA(unittest.TestCase): + """[summary] + Test for the file rsa.py + + Arguments: + unittest {[type]} -- [description] + """ + def test_encrypt_decrypt(self): + self.assertEqual(7,decrypt(encrypt(7, 23, 143), 47, 143)) + def test_key_generator(self): + n, e, d = generate_key(8) + data = 2 + en = encrypt(data, e, n) + dec = decrypt(en, d, n) + self.assertEqual(data,dec) + +if __name__ == "__main__": + unittest.main() \ No newline at end of file From f81bb05da571da8f3a4a4f3078f8e5fe4c14d23a Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Fri, 13 Apr 2018 01:04:32 -0700 Subject: [PATCH 229/387] Separate test case for sort (#222) * Add test_sort.py and separate test for bubble sort * Separate test for comb_sort * Add separate test for counting_sort * Separate test for heap_sort * Separate test for insertion_sort * Separate test for merge_sort * Separate test for quick_sort * Separate test for selection_sort * remove unused import * removed unused import --- sort/bubble_sort.py | 12 ---------- sort/comb_sort.py | 11 ---------- sort/counting_sort.py | 13 ----------- sort/heap_sort.py | 14 ------------ sort/insertion_sort.py | 14 +----------- sort/merge_sort.py | 11 ---------- sort/quick_sort.py | 12 ---------- sort/selection_sort.py | 16 -------------- sort/test_sort.py | 50 ++++++++++++++++++++++++++++++++++++++++++ 9 files changed, 51 insertions(+), 102 deletions(-) create mode 100644 sort/test_sort.py diff --git a/sort/bubble_sort.py b/sort/bubble_sort.py index 176217ac7..da9cebdf1 100644 --- a/sort/bubble_sort.py +++ b/sort/bubble_sort.py @@ -5,8 +5,6 @@ Worst-case performance: O(N^2) """ -import unittest - def bubble_sort(arr): def swap(i, j): @@ -21,13 +19,3 @@ def swap(i, j): swap(i - 1, i) swapped = True return arr - -class TestSuite(unittest.TestCase): - """ - test suite for the function (above) - """ - def test_bubble_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - bubble_sort([1, 5, 65, 23, 57, 1232])) -if __name__ == "__main__": - unittest.main() diff --git a/sort/comb_sort.py b/sort/comb_sort.py index 0b066ce0b..338771d2b 100644 --- a/sort/comb_sort.py +++ b/sort/comb_sort.py @@ -5,7 +5,6 @@ Worst-case performance: O(N^2) """ -import unittest from math import floor @@ -33,13 +32,3 @@ def swap(i, j): sorted = False i = i + 1 return arr - -class TestSuite(unittest.TestCase): - """ - test suite for the function (above) - """ - def test_comb_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - comb_sort([1, 5, 65, 23, 57, 1232])) -if __name__ == "__main__": - unittest.main() diff --git a/sort/counting_sort.py b/sort/counting_sort.py index 6228e6f3c..9b11af3cc 100644 --- a/sort/counting_sort.py +++ b/sort/counting_sort.py @@ -1,4 +1,3 @@ -import unittest def counting_sort(arr): """ Counting_sort @@ -35,15 +34,3 @@ def counting_sort(arr): temp_arr[arr[i]] = temp_arr[arr[i]]-1 return result_arr - -class TestSuite(unittest.TestCase): - """ - test suite for the function (above) - """ - def test_counting_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - counting_sort([1, 5, 65, 23, 57, 1232])) - self.assertEqual([-1232, -65, -57, -23, -5, -1], - counting_sort([-1, -5, -65, -23, -57, -1232])) -if __name__ == "__main__": - unittest.main() diff --git a/sort/heap_sort.py b/sort/heap_sort.py index a069511c0..5cdc78665 100644 --- a/sort/heap_sort.py +++ b/sort/heap_sort.py @@ -1,4 +1,3 @@ -import unittest def max_heap_sort(arr): """ Heap Sort that uses a max heap to sort an array in ascending order Complexity: O(n log(n)) @@ -76,16 +75,3 @@ def min_heapify(arr, start): # If no swap occured, no need to keep iterating else: break - -class TestSuite(unittest.TestCase): - """ - test suite for the function (above) - """ - def test_max_heap_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - max_heap_sort([1, 5, 65, 23, 57, 1232])) - def test_min_heap_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - min_heap_sort([1, 5, 65, 23, 57, 1232])) -if __name__ == "__main__": - unittest.main() diff --git a/sort/insertion_sort.py b/sort/insertion_sort.py index 6f2430a49..07a0a5265 100644 --- a/sort/insertion_sort.py +++ b/sort/insertion_sort.py @@ -1,4 +1,3 @@ -import unittest def insertion_sort(arr): """ Insertion Sort Complexity: O(n^2) @@ -12,16 +11,5 @@ def insertion_sort(arr): pos = pos-1 # Break and do the final swap arr[pos] = cursor - - return arr -class TestSuite(unittest.TestCase): - """ - test suite for the function (above) - """ - def test_insertion_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - insertion_sort([1, 5, 65, 23, 57, 1232])) - -if __name__ == "__main__": - unittest.main() + return arr diff --git a/sort/merge_sort.py b/sort/merge_sort.py index 69c095c99..e1b62b337 100644 --- a/sort/merge_sort.py +++ b/sort/merge_sort.py @@ -1,4 +1,3 @@ -import unittest def merge_sort(arr): """ Merge Sort Complexity: O(n log(n)) @@ -35,13 +34,3 @@ def merge(left, right): # Return result return arr - -class TestSuite(unittest.TestCase): - """ - test suite for the function (above) - """ - def test_merge_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - merge_sort([1, 5, 65, 23, 57, 1232])) -if __name__ == "__main__": - unittest.main() diff --git a/sort/quick_sort.py b/sort/quick_sort.py index 9d48b2f40..bec81328e 100644 --- a/sort/quick_sort.py +++ b/sort/quick_sort.py @@ -1,4 +1,3 @@ -import unittest def quick_sort(arr, first, last): """ Quicksort Complexity: best O(n) avg O(n log(n)), worst O(N^2) @@ -17,14 +16,3 @@ def partition(arr, first, last): wall += 1 arr[wall], arr[last] = arr[last], arr[wall] return wall - -class TestSuite(unittest.TestCase): - """ - test suite for the function (above) - """ - def test_quick_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - quick_sort([1, 5, 65, 23, 57, 1232], 0, 5)) - -if __name__ == "__main__": - unittest.main() diff --git a/sort/selection_sort.py b/sort/selection_sort.py index 18e1aa783..fed1c3466 100644 --- a/sort/selection_sort.py +++ b/sort/selection_sort.py @@ -1,6 +1,3 @@ -import unittest - - def selection_sort(arr): """ Selection Sort Complexity: O(n^2) @@ -14,16 +11,3 @@ def selection_sort(arr): arr[minimum], arr[i] = arr[i], arr[minimum] return arr - - -class TestSuite(unittest.TestCase): - """ - test suite for the function (above) - """ - def test_selection_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - selection_sort([1, 5, 65, 23, 57, 1232])) - - -if __name__ == "__main__": - unittest.main() diff --git a/sort/test_sort.py b/sort/test_sort.py new file mode 100644 index 000000000..085a12ff0 --- /dev/null +++ b/sort/test_sort.py @@ -0,0 +1,50 @@ +from bubble_sort import bubble_sort +from comb_sort import comb_sort +from counting_sort import counting_sort +from heap_sort import max_heap_sort, min_heap_sort +from insertion_sort import insertion_sort +from merge_sort import merge_sort +from quick_sort import quick_sort +from selection_sort import selection_sort + +import unittest + +class TestSuite(unittest.TestCase): + def test_bubble_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + bubble_sort([1, 5, 65, 23, 57, 1232])) + + def test_comb_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + comb_sort([1, 5, 65, 23, 57, 1232])) + + def test_counting_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + counting_sort([1, 5, 65, 23, 57, 1232])) + self.assertEqual([-1232, -65, -57, -23, -5, -1], + counting_sort([-1, -5, -65, -23, -57, -1232])) + + def test_heap_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + max_heap_sort([1, 5, 65, 23, 57, 1232])) + self.assertEqual([1, 5, 23, 57, 65, 1232], + min_heap_sort([1, 5, 65, 23, 57, 1232])) + + def test_insertion_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + insertion_sort([1, 5, 65, 23, 57, 1232])) + + def test_merge_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + merge_sort([1, 5, 65, 23, 57, 1232])) + + def test_quick_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + quick_sort([1, 5, 65, 23, 57, 1232], 0, 5)) + + def test_selection_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + selection_sort([1, 5, 65, 23, 57, 1232])) + +if __name__ == "__main__": + unittest.main() From ba45a71f904e18ab3a1c5154baf9cd2f8ce21f4a Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Fri, 13 Apr 2018 17:41:36 +0200 Subject: [PATCH 230/387] update information in CONTRIBUTING.md * added some informations * added a sentence --- CONTRIBUTING.md | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md index f18759299..28b379cca 100644 --- a/CONTRIBUTING.md +++ b/CONTRIBUTING.md @@ -3,16 +3,21 @@ We love pull requests from everyone. By contributing to this repository, you agree to abide by the [Code of Conduct](CODE_OF_CONDUCT.md). -## Get Started -First [fork][fork] the repository and then clone it using: +## Get Started - git clone git@github.com:your-username/algorithms.git +* First [fork][fork] the repository and then clone it using: + git clone git@github.com:your-username/algorithms.git + +* After that create a branch for your changes. For example: + * add_XXX if you will add new algorithms or data structures. + * fix_XXX if you will fixe a bug on a certain algorithm or data structure. + * test_XXX if you wrote a test/s. You may contribute by: - implementing new algorithms in the repo. Be sure to keep it under right section (e.g. [array](array), [dp](dp), etc). Make a new section for it if -it doesn't fall under any section. +it doesn't fall under any section. Make sure that your implementation works. - optimizing or improving the existing algorithms. - adding a different solution for the problem. - finding and fixing bugs. From 73ab539aa1c0bc6c9b02a5a8ccb0fcbf7c53a098 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Fri, 13 Apr 2018 21:51:26 +0530 Subject: [PATCH 231/387] added seed in maths/rsa.py and pep8 fixes in test_maths.py --- maths/rabin_miller.py | 63 ++++++++++++++---------------- maths/rsa.py | 70 ++++++++++++++++++--------------- maths/test_maths.py | 91 ++++++++++++++++++++++++------------------- 3 files changed, 118 insertions(+), 106 deletions(-) diff --git a/maths/rabin_miller.py b/maths/rabin_miller.py index c8e2921cb..ecb038afb 100644 --- a/maths/rabin_miller.py +++ b/maths/rabin_miller.py @@ -1,54 +1,51 @@ -import random,sys - -# factor n into a power of 2 times an odd number -def pow2_factor(n): - power = 0 - while n % 2 == 0: - n /= 2 - power += 1 - return power, n - -def pow_3(a, b, c): - """ - helper function for a, b and c integers. - """ - return a**b % c - """ Rabin-Miller primality test -returning False implies that n is guarenteed composite -returning True means that n is probably prime +returning False implies that n is guaranteed composite +returning True means that n is probaly prime with a 4 ** -k chance of being wrong """ +import random + + def is_prime(n, k): - #precondition - assert n >= 5, "the to tested number must been >= 5" - r, d = pow2_factor(n - 1) - - """ - returns true if a is a valid 'witness' for n - a valid witness increases chances of n being prime - an invalid witness guarentees n is composite - """ + def pow2_factor(num): + """factor n into a power of 2 times an odd number""" + power = 0 + while num % 2 == 0: + num /= 2 + power += 1 + return power, num + def valid_witness(a): + """ + returns true if a is a valid 'witness' for n + a valid witness increases chances of n being prime + an invalid witness guarantees n is composite + """ x = pow(int(a), int(d), int(n)) - + if x == 1 or x == n - 1: return False - + for _ in range(r - 1): x = pow(int(x), int(2), int(n)) - + if x == 1: return True if x == n - 1: return False - + return True - + + # precondition n >= 5 + if n < 5: + return n == 2 or n == 3 # True for prime + + r, d = pow2_factor(n - 1) + for _ in range(k): if valid_witness(random.randrange(2, n - 2)): return False - return True \ No newline at end of file + return True diff --git a/maths/rsa.py b/maths/rsa.py index 5ec1ccc25..e3f29956c 100644 --- a/maths/rsa.py +++ b/maths/rsa.py @@ -23,66 +23,72 @@ import random -from rabin_miller import * # is_prime -from extended_gcd import * # extended_gcd -""" -generate a prime with k bits -""" -def genprime(k): - random.seed() - while True: - n = random.randrange(int(2 ** (k - 1)),int(2 ** k)) - if is_prime(n,128): - return n - - -""" -calculate the inverse of a mod m -that is, find b such that (a * b) % m == 1 -""" def modinv(a, m): - b = 1 - while ((a*b) % m != 1): - b += 1 - return b + """calculate the inverse of a mod m + that is, find b such that (a * b) % m == 1""" + b = 1 + while not (a * b) % m == 1: + b += 1 + return b + + +def generate_key(k, seed=None): + """ + the RSA key generating algorithm + k is the number of bits in n + """ + + def gen_prime(k, seed=None): + """generate a prime with k bits""" + + def is_prime(num): + if num == 2: + return True + for i in range(2, int(num ** 0.5) + 1): + if num % i == 0: + return False + return True + + random.seed(seed) + while True: + key = random.randrange(int(2 ** (k - 1)), int(2 ** k)) + if is_prime(key): + return key -""" -the RSA key generating algorithm -k is the number of bits in n -""" -def generate_key(k): # size in bits of p and q need to add up to the size of n p_size = k / 2 q_size = k - p_size - e = genprime(k) # in many cases, e is also chosen to be a small constant + e = gen_prime(k, seed) # in many cases, e is also chosen to be a small constant while True: - p = genprime(k / 2) + p = gen_prime(p_size, seed) if p % e != 1: break while True: - q = genprime(k - k / 2) + q = gen_prime(q_size, seed) if q % e != 1: break n = p * q - l = (p - 1) * (q - 1) # calculate totient function - d = modinv(e,l) + l = (p - 1) * (q - 1) # calculate totient function + d = modinv(e, l) return int(n), int(e), int(d) + def encrypt(data, e, n): return pow(int(data), int(e), int(n)) + def decrypt(data, d, n): return pow(int(data), int(d), int(n)) -#sample usage: +# sample usage: # n,e,d = generate_key(16) # data = 20 # encrypted = pow(data,e,n) diff --git a/maths/test_maths.py b/maths/test_maths.py index ff6cda07d..63cb389f9 100644 --- a/maths/test_maths.py +++ b/maths/test_maths.py @@ -1,17 +1,17 @@ -from base_conversion import int2base,base2int +import unittest + +from base_conversion import int2base, base2int from extended_gcd import extended_gcd -from gcd import gcd,lcm -from generate_strobogrammtic import gen_strobogrammatic,strobogrammaticInRange -from is_strobogrammatic import is_strobogrammatic,is_strobogrammatic2 -from next_perfect_square import find_next_square,find_next_square2 +from gcd import gcd, lcm +from generate_strobogrammtic import gen_strobogrammatic, strobogrammaticInRange +from is_strobogrammatic import is_strobogrammatic, is_strobogrammatic2 +from next_perfect_square import find_next_square, find_next_square2 +from prime_test import prime_test from primes_sieve_of_eratosthenes import primes -from prime_test import prime_test, prime_test2 from pythagoras import pythagoras -from rabin_miller import is_prime +from rabin_miller import is_prime from rsa import encrypt, decrypt, generate_key -import unittest - class TestBaseConversion(unittest.TestCase): """ @@ -22,13 +22,14 @@ class TestBaseConversion(unittest.TestCase): """ def test_int2base(self): - self.assertEqual("101",int2base(5,2)) - self.assertEqual("0",int2base(0,2)) - self.assertEqual("FF",int2base(255,16)) + self.assertEqual("101", int2base(5, 2)) + self.assertEqual("0", int2base(0, 2)) + self.assertEqual("FF", int2base(255, 16)) + def test_base2int(self): - self.assertEqual(5,base2int("101",2)) - self.assertEqual(0,base2int("0",2)) - self.assertEqual(255,base2int("FF",16)) + self.assertEqual(5, base2int("101", 2)) + self.assertEqual(0, base2int("0", 2)) + self.assertEqual(255, base2int("FF", 16)) class TestExtendedGcd(unittest.TestCase): @@ -40,8 +41,8 @@ class TestExtendedGcd(unittest.TestCase): """ def test_extended_gcd(self): - self.assertEqual((0,1,2),extended_gcd(8,2)) - self.assertEqual((0,1,17),extended_gcd(13,17)) + self.assertEqual((0, 1, 2), extended_gcd(8, 2)) + self.assertEqual((0, 1, 17), extended_gcd(13, 17)) class TestGcd(unittest.TestCase): @@ -53,10 +54,11 @@ class TestGcd(unittest.TestCase): """ def test_gcd(self): - self.assertEqual(4,gcd(8,12)) - self.assertEqual(1,gcd(13,17)) + self.assertEqual(4, gcd(8, 12)) + self.assertEqual(1, gcd(13, 17)) + def test_lcm(self): - self.assertEqual(24,lcm(8,12)) + self.assertEqual(24, lcm(8, 12)) class TestGenerateStroboGrammatic(unittest.TestCase): @@ -68,9 +70,10 @@ class TestGenerateStroboGrammatic(unittest.TestCase): """ def test_gen_strobomatic(self): - self.assertEqual(['88', '11', '96', '69'],gen_strobogrammatic(2)) + self.assertEqual(['88', '11', '96', '69'], gen_strobogrammatic(2)) + def test_strobogrammaticInRange(self): - self.assertEqual(4,strobogrammaticInRange("10","100")) + self.assertEqual(4, strobogrammaticInRange("10", "100")) class TestIsStrobogrammatic(unittest.TestCase): @@ -84,6 +87,7 @@ class TestIsStrobogrammatic(unittest.TestCase): def test_is_strobogrammatic(self): self.assertTrue(is_strobogrammatic("69")) self.assertFalse(is_strobogrammatic("14")) + def test_is_strobogrammatic2(self): self.assertTrue(is_strobogrammatic2("69")) self.assertFalse(is_strobogrammatic2("14")) @@ -98,11 +102,12 @@ class TestNextPerfectSquare(unittest.TestCase): """ def test_find_next_square(self): - self.assertEqual(36,find_next_square(25)) - self.assertEqual(1,find_next_square(0)) + self.assertEqual(36, find_next_square(25)) + self.assertEqual(1, find_next_square(0)) + def test_find_next_square2(self): - self.assertEqual(36,find_next_square2(25)) - self.assertEqual(1,find_next_square2(0)) + self.assertEqual(36, find_next_square2(25)) + self.assertEqual(1, find_next_square2(0)) class TestPrimesSieveOfEratosthenes(unittest.TestCase): @@ -114,10 +119,10 @@ class TestPrimesSieveOfEratosthenes(unittest.TestCase): """ def test_primes(self): - self.assertEqual([2, 3, 5, 7],primes(7)) + self.assertEqual([2, 3, 5, 7], primes(7)) -class TestPrimeTest (unittest.TestCase): +class TestPrimeTest(unittest.TestCase): """[summary] Test for the file prime_test.py @@ -131,21 +136,22 @@ def test_prime_test(self): Between 2 up to 100 exists 25 prime numbers! """ counter = 0 - for i in range(2,101): + for i in range(2, 101): if prime_test(i): counter += 1 - self.assertEqual(25,counter) + self.assertEqual(25, counter) + def test_prime_test2(self): """ checks all prime numbers between 2 up to 100. Between 2 up to 100 exists 25 prime numbers! """ counter = 0 - for i in range(2,101): + for i in range(2, 101): if prime_test(i): counter += 1 - self.assertEqual(25,counter) - + self.assertEqual(25, counter) + class TestPythagoras(unittest.TestCase): """[summary] @@ -156,7 +162,7 @@ class TestPythagoras(unittest.TestCase): """ def test_pythagoras(self): - self.assertEqual("Hypotenuse = 3.605551275463989",pythagoras(3, 2, "?")) + self.assertEqual("Hypotenuse = 3.605551275463989", pythagoras(3, 2, "?")) class TestRabinMiller(unittest.TestCase): @@ -168,9 +174,9 @@ class TestRabinMiller(unittest.TestCase): """ def test_is_prime(self): - self.assertTrue(is_prime(7,2)) - self.assertTrue(is_prime(13,11)) - self.assertFalse(is_prime(6,2)) + self.assertTrue(is_prime(7, 2)) + self.assertTrue(is_prime(13, 11)) + self.assertFalse(is_prime(6, 2)) class TestRSA(unittest.TestCase): @@ -180,14 +186,17 @@ class TestRSA(unittest.TestCase): Arguments: unittest {[type]} -- [description] """ + def test_encrypt_decrypt(self): - self.assertEqual(7,decrypt(encrypt(7, 23, 143), 47, 143)) + self.assertEqual(7, decrypt(encrypt(7, 23, 143), 47, 143)) + def test_key_generator(self): - n, e, d = generate_key(8) + n, e, d = generate_key(8, seed='test') data = 2 en = encrypt(data, e, n) dec = decrypt(en, d, n) - self.assertEqual(data,dec) + self.assertEqual(data, dec) + if __name__ == "__main__": - unittest.main() \ No newline at end of file + unittest.main() From d05237bc0e2f515c7dc25f0a4372d36994fee9b1 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Fri, 13 Apr 2018 21:58:10 +0530 Subject: [PATCH 232/387] Update rabin_miller.py --- maths/rabin_miller.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/maths/rabin_miller.py b/maths/rabin_miller.py index ecb038afb..a3aad8ef2 100644 --- a/maths/rabin_miller.py +++ b/maths/rabin_miller.py @@ -1,7 +1,7 @@ """ Rabin-Miller primality test returning False implies that n is guaranteed composite -returning True means that n is probaly prime +returning True means that n is probably prime with a 4 ** -k chance of being wrong """ import random From 8a51db21efec6c67cabe0666cb36cc8317012aea Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Fri, 13 Apr 2018 21:54:22 -0700 Subject: [PATCH 233/387] Separate test for bit (#230) * Add test_bit to bit * Separate test for add_bitwise_operator * Separate test for count_ones * Separate test for find_missing_number * Separate test for power_of_two * Separate test for reverse_bits * Separate test for single_number * Separate test for single_number2 * Separate test for subsets --- bit/add_bitwise_operator.py | 17 ----- bit/count_ones.py | 45 +------------ bit/find_missing_number.py | 36 ---------- bit/power_of_two.py | 19 ------ bit/reverse_bits.py | 23 ------- bit/single_number.py | 27 -------- bit/single_number2.py | 40 ----------- bit/subsets.py | 23 ------- bit/test_bit.py | 129 ++++++++++++++++++++++++++++++++++++ 9 files changed, 132 insertions(+), 227 deletions(-) create mode 100644 bit/test_bit.py diff --git a/bit/add_bitwise_operator.py b/bit/add_bitwise_operator.py index af0e7fff8..d9704decb 100644 --- a/bit/add_bitwise_operator.py +++ b/bit/add_bitwise_operator.py @@ -5,9 +5,6 @@ Input: 2 3 Output: 5 """ -import unittest - - def add_bitwise_operator(x, y): while y: @@ -15,17 +12,3 @@ def add_bitwise_operator(x, y): x = x ^ y y = carry << 1 return x - - -class TestSuite(unittest.TestCase): - - def test_add_bitwise_operator(self): - - self.assertEqual(5432 + 97823, add_bitwise_operator(5432, 97823)) - self.assertEqual(0, add_bitwise_operator(0, 0)) - self.assertEqual(10, add_bitwise_operator(10, 0)) - self.assertEqual(10, add_bitwise_operator(0, 10)) - - -if __name__ == '__main__': - unittest.main() diff --git a/bit/count_ones.py b/bit/count_ones.py index e6d25d16e..700efe9e2 100644 --- a/bit/count_ones.py +++ b/bit/count_ones.py @@ -6,17 +6,14 @@ For example, the 32-bit integer ’11' has binary representation 00000000000000000000000000001011, so the function should return 3. - + T(n)- O(k) : k is the number of 1s present in binary representation. -NOTE: this complexity is better than O(log n). +NOTE: this complexity is better than O(log n). e.g. for n = 00010100000000000000000000000000 only 2 iterations are required. Number of loops is equal to the number of 1s in the binary representation.""" -import unittest - - def count_ones_recur(n): """Using Brian Kernighan’s Algorithm. (Recursive Approach)""" @@ -30,42 +27,6 @@ def count_ones_iter(n): count = 0 while n: - n &= (n-1) + n &= (n-1) count += 1 return count - - -class TestSuite(unittest.TestCase): - - def test_count_ones_recur(self): - - # 8 -> 1000 - self.assertEqual(1, count_ones_recur(8)) - - # 109 -> 1101101 - self.assertEqual(5, count_ones_recur(109)) - - # 63 -> 111111 - self.assertEqual(6, count_ones_recur(63)) - - # 0 -> 0 - self.assertEqual(0, count_ones_recur(0)) - - def test_count_ones_iter(self): - - # 8 -> 1000 - self.assertEqual(1, count_ones_iter(8)) - - # 109 -> 1101101 - self.assertEqual(5, count_ones_iter(109)) - - # 63 -> 111111 - self.assertEqual(6, count_ones_iter(63)) - - # 0 -> 0 - self.assertEqual(0, count_ones_iter(0)) - - -if __name__ == '__main__': - - unittest.main() \ No newline at end of file diff --git a/bit/find_missing_number.py b/bit/find_missing_number.py index e472ba51a..9aedc508b 100644 --- a/bit/find_missing_number.py +++ b/bit/find_missing_number.py @@ -4,10 +4,6 @@ consecutive integers cannot be more than 1. If the sequence is already complete, the next integer in the sequence will be returned. """ -import unittest -import random - - def find_missing_number(nums): missing = 0 @@ -25,35 +21,3 @@ def find_missing_number2(nums): total_sum = n*(n+1) // 2 missing = total_sum - num_sum return missing - - -class TestSuite(unittest.TestCase): - - def setUp(self): - """Initialize seed.""" - random.seed("test") - - def test_find_missing_number(self): - - self.assertEqual(7, find_missing_number([4, 1, 3, 0, 6, 5, 2])) - self.assertEqual(0, find_missing_number([1])) - self.assertEqual(1, find_missing_number([0])) - - nums = [i for i in range(100000) if i != 12345] - random.shuffle(nums) - self.assertEqual(12345, find_missing_number(nums)) - - def test_find_missing_number2(self): - - self.assertEqual(7, find_missing_number2([4, 1, 3, 0, 6, 5, 2])) - self.assertEqual(0, find_missing_number2([1])) - self.assertEqual(1, find_missing_number2([0])) - - nums = [i for i in range(100000) if i != 12345] - random.shuffle(nums) - self.assertEqual(12345, find_missing_number2(nums)) - - -if __name__ == '__main__': - - unittest.main() diff --git a/bit/power_of_two.py b/bit/power_of_two.py index c70c6247b..01587788a 100644 --- a/bit/power_of_two.py +++ b/bit/power_of_two.py @@ -1,28 +1,9 @@ """ given an integer, write a function to determine if it is a power of two """ -import unittest - - def is_power_of_two(n): """ :type n: int :rtype: bool """ return n > 0 and not n & (n-1) - - -class TestSuite(unittest.TestCase): - - def test_is_power_of_two(self): - - self.assertTrue(is_power_of_two(64)) - self.assertFalse(is_power_of_two(91)) - self.assertTrue(is_power_of_two(2**1001)) - self.assertTrue(is_power_of_two(1)) - self.assertFalse(is_power_of_two(0)) - - -if __name__ == '__main__': - - unittest.main() diff --git a/bit/reverse_bits.py b/bit/reverse_bits.py index 0f8077a23..410c63d57 100644 --- a/bit/reverse_bits.py +++ b/bit/reverse_bits.py @@ -6,9 +6,6 @@ return 964176192 (represented in binary as 00111001011110000010100101000000). """ -import unittest - - def reverse_bits(n): m = 0 i = 0 @@ -17,23 +14,3 @@ def reverse_bits(n): n >>= 1 i += 1 return m - - -class TestSuite(unittest.TestCase): - - def test_reverse_bits(self): - - self.assertEqual(43261596, reverse_bits(964176192)) - self.assertEqual(964176192, reverse_bits(43261596)) - self.assertEqual(1, reverse_bits(2147483648)) - - # bin(0) => 00000000000000000000000000000000 - self.assertEqual(0, reverse_bits(0)) - - # bin(2**32 - 1) => 11111111111111111111111111111111 - self.assertEqual(2**32 - 1, reverse_bits(2**32 - 1)) - - -if __name__ == '__main__': - - unittest.main() \ No newline at end of file diff --git a/bit/single_number.py b/bit/single_number.py index 50a3a507f..6e0b6f705 100644 --- a/bit/single_number.py +++ b/bit/single_number.py @@ -10,10 +10,6 @@ Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory? """ -import unittest -import random - - def single_number(nums): """ Returns single number, if found. @@ -25,26 +21,3 @@ def single_number(nums): for num in nums: i ^= num return i - - -class TestSuite(unittest.TestCase): - - def test_single_number(self): - - random.seed('test') - - self.assertEqual(0, single_number([1, 0, 2, 1, 2, 3, 3])) - self.assertEqual(101, single_number([101])) - - single = random.randint(1, 100000) - nums = [random.randint(1, 100000) for _ in range(1000)] - nums *= 2 # nums contains pairs of random integers - nums.append(single) - random.shuffle(nums) - - self.assertEqual(single, single_number(nums)) - - -if __name__ == '__main__': - - unittest.main() diff --git a/bit/single_number2.py b/bit/single_number2.py index 2c7fd2d3e..9aff72cfe 100644 --- a/bit/single_number2.py +++ b/bit/single_number2.py @@ -17,10 +17,6 @@ the remaining should be the exact bit of the single number. In this way, you get the 32 bits of the single number. """ -import unittest -import random - - def single_number(nums): """ :type nums: List[int] @@ -45,39 +41,3 @@ def single_number2(nums): ones = (ones ^ nums[i]) & ~twos twos = (twos ^ nums[i]) & ~ones return ones - - -class TestSuite(unittest.TestCase): - - def setUp(self): - - random.seed("test") - - def test_single_number(self): - - self.assertEqual(3, single_number([4, 2, 3, 2, 1, 1, 4, 2, 4, 1])) - - single = random.randint(1, 100000) - nums = [random.randint(1, 100000) for _ in range(1000)] - nums *= 3 # nums contains triplets of random integers - nums.append(single) - random.shuffle(nums) - - self.assertEqual(single, single_number(nums)) - - def test_single_number2(self): - - self.assertEqual(3, single_number2([4, 2, 3, 2, 1, 1, 4, 2, 4, 1])) - - single = random.randint(1, 100000) - nums = [random.randint(1, 100000) for _ in range(1000)] - nums *= 3 # nums contains triplets of random integers - nums.append(single) - random.shuffle(nums) - - self.assertEqual(single, single_number2(nums)) - - -if __name__ == '__main__': - - unittest.main() \ No newline at end of file diff --git a/bit/subsets.py b/bit/subsets.py index e2e44fa9f..6d5a0a284 100644 --- a/bit/subsets.py +++ b/bit/subsets.py @@ -18,9 +18,6 @@ (2, 3) } """ -import unittest - - def subsets(nums): """ :param nums: List[int] @@ -35,26 +32,6 @@ def subsets(nums): res.add(subset) return res - - -class TestSuite(unittest.TestCase): - - def test_subsets(self): - - self.assertSetEqual(subsets([1, 2, 3]), - {(), (1,), (2,), (3,), (1, 2), (1, 3), (2, 3), (1, 2, 3)}) - - self.assertSetEqual(subsets([10, 20, 30, 40]), - {(10, 40), (10, 20, 40), (10, 30), (10, 20, 30, 40), (40,), - (10, 30, 40), (30,), (20, 30), (30, 40), (10,), (), - (10, 20), (20, 40), (20, 30, 40), (10, 20, 30), (20,)}) - - -if __name__ == '__main__': - - unittest.main() - - """ this explanation is from leet_nik @ leetcode This is an amazing solution. Learnt a lot. diff --git a/bit/test_bit.py b/bit/test_bit.py new file mode 100644 index 000000000..4a4c13856 --- /dev/null +++ b/bit/test_bit.py @@ -0,0 +1,129 @@ +from add_bitwise_operator import add_bitwise_operator +from count_ones import count_ones_iter, count_ones_recur +from find_missing_number import find_missing_number, find_missing_number2 +from power_of_two import is_power_of_two +from reverse_bits import reverse_bits +from single_number import single_number +from single_number2 import single_number2 +from subsets import subsets + +import unittest +import random + +class TestSuite(unittest.TestCase): + + def test_add_bitwise_operator(self): + self.assertEqual(5432 + 97823, add_bitwise_operator(5432, 97823)) + self.assertEqual(0, add_bitwise_operator(0, 0)) + self.assertEqual(10, add_bitwise_operator(10, 0)) + self.assertEqual(10, add_bitwise_operator(0, 10)) + + def test_count_ones_recur(self): + + # 8 -> 1000 + self.assertEqual(1, count_ones_recur(8)) + + # 109 -> 1101101 + self.assertEqual(5, count_ones_recur(109)) + + # 63 -> 111111 + self.assertEqual(6, count_ones_recur(63)) + + # 0 -> 0 + self.assertEqual(0, count_ones_recur(0)) + + def test_count_ones_iter(self): + + # 8 -> 1000 + self.assertEqual(1, count_ones_iter(8)) + + # 109 -> 1101101 + self.assertEqual(5, count_ones_iter(109)) + + # 63 -> 111111 + self.assertEqual(6, count_ones_iter(63)) + + # 0 -> 0 + self.assertEqual(0, count_ones_iter(0)) + + def setUp(self): + """Initialize seed.""" + random.seed("test") + + def test_find_missing_number(self): + + self.assertEqual(7, find_missing_number([4, 1, 3, 0, 6, 5, 2])) + self.assertEqual(0, find_missing_number([1])) + self.assertEqual(1, find_missing_number([0])) + + nums = [i for i in range(100000) if i != 12345] + random.shuffle(nums) + self.assertEqual(12345, find_missing_number(nums)) + + def test_find_missing_number2(self): + + self.assertEqual(7, find_missing_number2([4, 1, 3, 0, 6, 5, 2])) + self.assertEqual(0, find_missing_number2([1])) + self.assertEqual(1, find_missing_number2([0])) + + nums = [i for i in range(100000) if i != 12345] + random.shuffle(nums) + self.assertEqual(12345, find_missing_number2(nums)) + + def test_is_power_of_two(self): + + self.assertTrue(is_power_of_two(64)) + self.assertFalse(is_power_of_two(91)) + self.assertTrue(is_power_of_two(2**1001)) + self.assertTrue(is_power_of_two(1)) + self.assertFalse(is_power_of_two(0)) + + def test_reverse_bits(self): + + self.assertEqual(43261596, reverse_bits(964176192)) + self.assertEqual(964176192, reverse_bits(43261596)) + self.assertEqual(1, reverse_bits(2147483648)) + + # bin(0) => 00000000000000000000000000000000 + self.assertEqual(0, reverse_bits(0)) + + # bin(2**32 - 1) => 11111111111111111111111111111111 + self.assertEqual(2**32 - 1, reverse_bits(2**32 - 1)) + + def test_single_number(self): + + random.seed('test') + + self.assertEqual(0, single_number([1, 0, 2, 1, 2, 3, 3])) + self.assertEqual(101, single_number([101])) + + single = random.randint(1, 100000) + nums = [random.randint(1, 100000) for _ in range(1000)] + nums *= 2 # nums contains pairs of random integers + nums.append(single) + random.shuffle(nums) + + self.assertEqual(single, single_number(nums)) + + def test_single_number2(self): + + self.assertEqual(3, single_number2([4, 2, 3, 2, 1, 1, 4, 2, 4, 1])) + single = random.randint(1, 100000) + nums = [random.randint(1, 100000) for _ in range(1000)] + nums *= 3 # nums contains triplets of random integers + nums.append(single) + random.shuffle(nums) + self.assertEqual(single, single_number2(nums)) + + def test_subsets(self): + + self.assertSetEqual(subsets([1, 2, 3]), + {(), (1,), (2,), (3,), (1, 2), (1, 3), (2, 3), (1, 2, 3)}) + + self.assertSetEqual(subsets([10, 20, 30, 40]), + {(10, 40), (10, 20, 40), (10, 30), (10, 20, 30, 40), (40,), + (10, 30, 40), (30,), (20, 30), (30, 40), (10,), (), + (10, 20), (20, 40), (20, 30, 40), (10, 20, 30), (20,)}) + +if __name__ == '__main__': + unittest.main() From 063b3f4f45f2d224e0902ce46ed6095b181eb9f6 Mon Sep 17 00:00:00 2001 From: Murilo Camargos Date: Sat, 14 Apr 2018 17:21:40 -0300 Subject: [PATCH 234/387] Refactor Tarjan (#231) * Place tarjan's graph helpers at graph.py for reuse * Transforms tarjan algorithm into class * Add tarjan's examples as test cases * Comment out testing lines --- .gitignore | 1 + graph/graph.py | 80 ++++++++++++++++-- graph/tarjan.py | 197 +++++++++++--------------------------------- graph/test_graph.py | 44 ++++++++++ 4 files changed, 168 insertions(+), 154 deletions(-) create mode 100644 graph/test_graph.py diff --git a/.gitignore b/.gitignore index eb2aa3a69..409fb539f 100755 --- a/.gitignore +++ b/.gitignore @@ -2,3 +2,4 @@ __pycache__/ *.py[cod] .idea/ .cache/ +.pytest_cache/ \ No newline at end of file diff --git a/graph/graph.py b/graph/graph.py index 7e551f3d6..3cc41793d 100644 --- a/graph/graph.py +++ b/graph/graph.py @@ -1,3 +1,69 @@ +""" +These are classes to represent a Graph and its elements. +It can be shared across graph algorithms. +""" + +class Node(object): + def __init__(self, name): + self.name = name + + def __eq__(self, obj): + if isinstance(obj, Node): + return obj.name == self.name + elif isinstance(obj, str): + return obj == self.name + return False + + def __repr__(self): + return self.name + + def __hash__(self): + return hash(self.name) + +class DirectedEdge(object): + def __init__(self, node_from, node_to): + self.nf = node_from + self.nt = node_to + + def __eq__(self, obj): + if isinstance(obj, DirectedEdge): + return obj.nf == self.nf and obj.nt == self.nt + return False + + def __repr__(self): + return '({0} -> {1})'.format(self.nf, self.nt) + +class DirectedGraph(object): + def __init__(self, load_dict={}): + self.nodes = [] + self.edges = [] + self.adjmt = {} + + if load_dict and type(load_dict) == dict: + for v in load_dict: + node_from = self.add_node(v) + self.adjmt[node_from] = [] + for w in load_dict[v]: + node_to = self.add_node(w) + self.adjmt[node_from].append(node_to) + self.add_edge(v, w) + + def add_node(self, node_name): + try: + return self.nodes[self.nodes.index(node_name)] + except ValueError: + node = Node(node_name) + self.nodes.append(node) + return node + + def add_edge(self, node_name_from, node_name_to): + try: + node_from = self.nodes[self.nodes.index(node_name_from)] + node_to = self.nodes[self.nodes.index(node_name_to)] + self.edges.append(DirectedEdge(node_from, node_to)) + except ValueError: + pass + class Graph: def __init__(self, vertices): # No. of vertices @@ -16,10 +82,10 @@ def add_edge(self, u, v): else: self.graph[u] = [v] -g = Graph(4) -g.add_edge(0, 1) -g.add_edge(0, 2) -g.add_edge(1, 2) -g.add_edge(2, 0) -g.add_edge(2, 3) -g.add_edge(3, 3) +#g = Graph(4) +#g.add_edge(0, 1) +#g.add_edge(0, 2) +#g.add_edge(1, 2) +#g.add_edge(2, 0) +#g.add_edge(2, 3) +#g.add_edge(3, 3) diff --git a/graph/tarjan.py b/graph/tarjan.py index ffeb3542f..f998bd78b 100644 --- a/graph/tarjan.py +++ b/graph/tarjan.py @@ -3,151 +3,54 @@ in a graph. https://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm """ - -class Node(object): - def __init__(self, name): - self.name = name - - def __eq__(self, obj): - if isinstance(obj, Node): - return obj.name == self.name - elif isinstance(obj, str): - return obj == self.name - return False - - def __repr__(self): - return self.name - - def __hash__(self): - return hash(self.name) - -class DirectedEdge(object): - def __init__(self, node_from, node_to): - self.nf = node_from - self.nt = node_to - - def __eq__(self, obj): - if isinstance(obj, DirectedEdge): - return obj.nf == self.nf and obj.nt == self.nt - return False - - def __repr__(self): - return '({0} -> {1})'.format(self.nf, self.nt) - -class DirectedGraph(object): - def __init__(self, load_dict={}): - self.nodes = [] - self.edges = [] - self.adjmt = {} - - if load_dict and type(load_dict) == dict: - for v in load_dict: - node_from = self.add_node(v) - self.adjmt[node_from] = [] - for w in load_dict[v]: - node_to = self.add_node(w) - self.adjmt[node_from].append(node_to) - self.add_edge(v, w) - - def add_node(self, node_name): - try: - return self.nodes[self.nodes.index(node_name)] - except ValueError: - node = Node(node_name) - self.nodes.append(node) - return node - - def add_edge(self, node_name_from, node_name_to): - try: - node_from = self.nodes[self.nodes.index(node_name_from)] - node_to = self.nodes[self.nodes.index(node_name_to)] - self.edges.append(DirectedEdge(node_from, node_to)) - except ValueError: - pass - - - - -INDEX = 0 -STACK = [] - -def strongconnect(graph, v, sccs): - global INDEX, STACK - # Set the depth index for v to the smallest unused index - v.index = INDEX - v.lowlink = INDEX - INDEX += 1 - STACK.append(v) - v.on_stack = True - - # Consider successors of v - for w in graph.adjmt[v]: - if w.index == None: - # Successor w has not yet been visited; recurse on it - strongconnect(graph, w, sccs) - v.lowlink = min(v.lowlink, w.lowlink) - elif w.on_stack: - # Successor w is in stack S and hence in the current SCC - # If w is not on stack, then (v, w) is a cross-edge in the DFS tree and must be ignored - # Note: The next line may look odd - but is correct. - # It says w.index not w.lowlink; that is deliberate and from the original paper - v.lowlink = min(v.lowlink, w.index) - - # If v is a root node, pop the stack and generate an SCC - if v.lowlink == v.index: - # start a new strongly connected component - scc = [] - while True: - w = STACK.pop() - w.on_stack = False - scc.append(w) - if w == v: - break - sccs.append(scc) - - -def tarjan(graph): - # Set all node index to None - for v in graph.nodes: - v.index = None - - sccs = [] - for v in graph.nodes: - if v.index == None: - strongconnect(graph, v, sccs) - - return sccs - - -if __name__ == '__main__': - # Graph from https://en.wikipedia.org/wiki/File:Scc.png - example = { - 'A': ['B'], - 'B': ['C', 'E', 'F'], - 'C': ['D', 'G'], - 'D': ['C', 'H'], - 'E': ['A', 'F'], - 'F': ['G'], - 'G': ['F'], - 'H': ['D', 'G'] - } - - g = DirectedGraph(example) - print(tarjan(g)) - - # Graph from https://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm#/media/File:Tarjan%27s_Algorithm_Animation.gif - example = { - 'A': ['E'], - 'B': ['A'], - 'C': ['B', 'D'], - 'D': ['C'], - 'E': ['B'], - 'F': ['B', 'E', 'G'], - 'G': ['F', 'C'], - 'H': ['G', 'H', 'D'] - } - - g = DirectedGraph(example) - print(tarjan(g)) - +from graph import DirectedGraph + +class Tarjan(object): + def __init__(self, dict_graph): + self.graph = DirectedGraph(dict_graph) + self.index = 0 + self.stack = [] + + # Runs Tarjan + # Set all node index to None + for v in self.graph.nodes: + v.index = None + + self.sccs = [] + for v in self.graph.nodes: + if v.index == None: + self.strongconnect(v, self.sccs) + + def strongconnect(self, v, sccs): + # Set the depth index for v to the smallest unused index + v.index = self.index + v.lowlink = self.index + self.index += 1 + self.stack.append(v) + v.on_stack = True + + # Consider successors of v + for w in self.graph.adjmt[v]: + if w.index == None: + # Successor w has not yet been visited; recurse on it + self.strongconnect(w, sccs) + v.lowlink = min(v.lowlink, w.lowlink) + elif w.on_stack: + # Successor w is in stack S and hence in the current SCC + # If w is not on stack, then (v, w) is a cross-edge in the DFS tree and must be ignored + # Note: The next line may look odd - but is correct. + # It says w.index not w.lowlink; that is deliberate and from the original paper + v.lowlink = min(v.lowlink, w.index) + + # If v is a root node, pop the stack and generate an SCC + if v.lowlink == v.index: + # start a new strongly connected component + scc = [] + while True: + w = self.stack.pop() + w.on_stack = False + scc.append(w) + if w == v: + break + sccs.append(scc) \ No newline at end of file diff --git a/graph/test_graph.py b/graph/test_graph.py new file mode 100644 index 000000000..08402d25d --- /dev/null +++ b/graph/test_graph.py @@ -0,0 +1,44 @@ +from tarjan import Tarjan + +import unittest + + +class TestTarjan(unittest.TestCase): + """ + Test for the file tarjan.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_tarjan_example_1(self): + # Graph from https://en.wikipedia.org/wiki/File:Scc.png + example = { + 'A': ['B'], + 'B': ['C', 'E', 'F'], + 'C': ['D', 'G'], + 'D': ['C', 'H'], + 'E': ['A', 'F'], + 'F': ['G'], + 'G': ['F'], + 'H': ['D', 'G'] + } + + g = Tarjan(example) + self.assertEqual(g.sccs, [['F', 'G'], ['H', 'D', 'C'], ['E', 'B', 'A']]) + + def test_tarjan_example_2(self): + # Graph from https://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm#/media/File:Tarjan%27s_Algorithm_Animation.gif + example = { + 'A': ['E'], + 'B': ['A'], + 'C': ['B', 'D'], + 'D': ['C'], + 'E': ['B'], + 'F': ['B', 'E', 'G'], + 'G': ['F', 'C'], + 'H': ['G', 'H', 'D'] + } + + g = Tarjan(example) + self.assertEqual(g.sccs, [['B', 'E', 'A'], ['D', 'C'], ['G', 'F'], ['H']]) \ No newline at end of file From 533d9be5e80dcbbbef4eadcb86079f83b679e706 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sat, 14 Apr 2018 22:34:58 +0200 Subject: [PATCH 235/387] rewrote math.rsa test and commented it out * added a new test. * comment out * removed import math --- maths/rsa.py | 1 + maths/test_maths.py | 15 ++++++++------- 2 files changed, 9 insertions(+), 7 deletions(-) diff --git a/maths/rsa.py b/maths/rsa.py index 5ec1ccc25..e004103e0 100644 --- a/maths/rsa.py +++ b/maths/rsa.py @@ -26,6 +26,7 @@ from rabin_miller import * # is_prime from extended_gcd import * # extended_gcd + """ generate a prime with k bits """ diff --git a/maths/test_maths.py b/maths/test_maths.py index ff6cda07d..0ba638bf8 100644 --- a/maths/test_maths.py +++ b/maths/test_maths.py @@ -12,7 +12,6 @@ import unittest - class TestBaseConversion(unittest.TestCase): """ Test for the file base_conversion.py @@ -182,12 +181,14 @@ class TestRSA(unittest.TestCase): """ def test_encrypt_decrypt(self): self.assertEqual(7,decrypt(encrypt(7, 23, 143), 47, 143)) - def test_key_generator(self): - n, e, d = generate_key(8) - data = 2 - en = encrypt(data, e, n) - dec = decrypt(en, d, n) - self.assertEqual(data,dec) + # def test_key_generator(self): # this test takes a while! + # for i in range(100): + # print("step {0}".format(i)) + # n, e, d = generate_key(26) + # data = 2 + # en = encrypt(data, e, n) + # dec = decrypt(en, d, n) + # self.assertEqual(data,dec) if __name__ == "__main__": unittest.main() \ No newline at end of file From 0d3b951d553d9f3c7365d0b41f7f91b75f1bb83d Mon Sep 17 00:00:00 2001 From: Sa'd Date: Sun, 15 Apr 2018 12:47:59 -0500 Subject: [PATCH 236/387] Add strings/strip_url_params file. (#232) * Add strip_url_params function. The function removes duplicate query strings based off of an optional argument passed to the function. * Fix indentation error in strip_url_params.py * Import urlparse library in strip_url_param * Update README.md by adding strip_url_params.py * added the changes I requested on the review. - refactored names of urllib - add separate testcase for all 3 algorithms - renamed algorithms --- README.md | 1 + strings/strip_url_params.py | 118 ++++++++++++++++++++++++++++++++++++ 2 files changed, 119 insertions(+) create mode 100644 strings/strip_url_params.py diff --git a/README.md b/README.md index 8097c4d6f..7db62fbc6 100644 --- a/README.md +++ b/README.md @@ -188,6 +188,7 @@ To run the tests, clone the repo and run : - [remove_min](stack/remove_min.py) - [is_sorted](stack/is_sorted.py) - [strings](strings) + - [strip_url_params](strings/strip_url_params.py) - [domain_extractor](strings/domain_extractor.py) - [merge_string_checker](strings/merge_string_checker.py) - [add_binary](strings/add_binary.py) diff --git a/strings/strip_url_params.py b/strings/strip_url_params.py new file mode 100644 index 000000000..4a07752c2 --- /dev/null +++ b/strings/strip_url_params.py @@ -0,0 +1,118 @@ +""" +Write a function that does the following: +Removes any duplicate query string parameters from the url +Removes any query string parameters specified within the 2nd argument (optional array) + +An example: +www.saadbenn.com?a=1&b=2&a=2') // returns 'www.saadbenn.com?a=1&b=2' +""" +import unittest +from collections import defaultdict +import urllib +import urllib.parse + +# Here is a very non-pythonic grotesque solution +def strip_url_params1(url, params_to_strip=None): + + if not params_to_strip: + params_to_strip = [] + if url: + result = '' # final result to be returned + tokens = url.split('?') + domain = tokens[0] + query_string = tokens[-1] + result += domain + # add the '?' to our result if it is in the url + if len(tokens) > 1: + result += '?' + if not query_string: + return url + else: + # logic for removing duplicate query strings + # build up the list by splitting the query_string using digits + key_value_string = [] + string = '' + for char in query_string: + if char.isdigit(): + key_value_string.append(string + char) + string = '' + else: + string += char + dict = defaultdict(int) + # logic for checking whether we should add the string to our result + for i in key_value_string: + _token = i.split('=') + if _token[0]: + length = len(_token[0]) + if length == 1: + if _token and (not(_token[0] in dict)): + if params_to_strip: + if _token[0] != params_to_strip[0]: + dict[_token[0]] = _token[1] + result = result + _token[0] + '=' + _token[1] + else: + if not _token[0] in dict: + dict[_token[0]] = _token[1] + result = result + _token[0] + '=' + _token[1] + else: + check = _token[0] + letter = check[1] + if _token and (not(letter in dict)): + if params_to_strip: + if letter != params_to_strip[0]: + dict[letter] = _token[1] + result = result + _token[0] + '=' + _token[1] + else: + if not letter in dict: + dict[letter] = _token[1] + result = result + _token[0] + '=' + _token[1] + return result + +# A very friendly pythonic solution (easy to follow) +def strip_url_params2(url, param_to_strip=[]): + if '?' not in url: + return url + + queries = (url.split('?')[1]).split('&') + queries_obj = [query[0] for query in queries] + for i in range(len(queries_obj) - 1, 0, -1): + if queries_obj[i] in param_to_strip or queries_obj[i] in queries_obj[0:i]: + queries.pop(i) + + return url.split('?')[0] + '?' + '&'.join(queries) + + +# Here is my friend's solution using python's builtin libraries +def strip_url_params3(url, strip=None): + if not strip: strip = [] + + parse = urllib.parse.urlparse(url) + query = urllib.parse.parse_qs(parse.query) + + query = {k: v[0] for k, v in query.items() if k not in strip} + query = urllib.parse.urlencode(query) + new = parse._replace(query=query) + + return new.geturl() + + +class TestSuite(unittest.TestCase): + + def test_strip_url_params1(self): + + self.assertEqual(strip_url_params1("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") + self.assertEqual(strip_url_params1("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") + + + def test_strip_url_params2(self): + + self.assertEqual(strip_url_params2("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") + self.assertEqual(strip_url_params2("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") + + def test_strip_url_params3(self): + + self.assertEqual(strip_url_params3("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") + self.assertEqual(strip_url_params3("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") + +if __name__ == "__main__": + unittest.main() From bd62587d18d73a643c214aac8c573a589a26826f Mon Sep 17 00:00:00 2001 From: danghai Date: Mon, 16 Apr 2018 18:45:19 -0700 Subject: [PATCH 237/387] Add name's collaborators to CONTRIBUTING.md --- CONTRIBUTING.md | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md index 28b379cca..380bd3d64 100644 --- a/CONTRIBUTING.md +++ b/CONTRIBUTING.md @@ -30,7 +30,7 @@ Push to your fork and [submit a pull request][pr]. We will review and may suggest some changes or improvements or alternatives. Some things that will increase the chance that your pull request is accepted: -* All algorithms should be written in **Python 3**. +* All algorithms should be written in **Python 3**. (There are a few algorithms still in _Python 2_ syntax. You can start by converting [those][issue120] to _Python 3_.) * Write clean and understandable code. @@ -45,14 +45,20 @@ Submit a [new issue][newissue] if there is an algorithm to add, or if a bug was ## Collaborators You can ask for any help or clarifications from the collaborators. -[Keon Kim](https://github.com/keon) -[Rahul Goswami](https://github.com/goswami-rahul) +[Keon Kim](https://github.com/keon) + +[Rahul Goswami](https://github.com/goswami-rahul) + [Ankit Agarwal](https://github.com/ankit167) +[Hai Hoang Dang](https://github.com/danghai) + +[Saad](https://github.com/SaadBenn) + [fork]: https://help.github.com/articles/fork-a-repo/ [docstr]: https://www.python.org/dev/peps/pep-0257/#multi-line-docstrings [commit]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html [pr]: https://github.com/keon/algorithms/compare/ -[newissue]: https://github.com/keon/algorithms/issues/new +[newissue]: https://github.com/keon/algorithms/issues/new [issue120]: https://github.com/keon/algorithms/issues/120 [issues]: https://github.com/keon/algorithms/issues/ From 84966bd17e283a0308524bd18ff1a5d5636ced34 Mon Sep 17 00:00:00 2001 From: danghai Date: Mon, 16 Apr 2018 22:20:38 -0700 Subject: [PATCH 238/387] Separate test for linkedlist --- linkedlist/is_cyclic.py | 40 ----------- linkedlist/is_sorted.py | 37 ---------- linkedlist/remove_range.py | 32 --------- linkedlist/reverse.py | 8 ++- linkedlist/swap_in_pairs.py | 41 ++++------- linkedlist/test_linkedlist.py | 124 ++++++++++++++++++++++++++++++++++ 6 files changed, 142 insertions(+), 140 deletions(-) create mode 100644 linkedlist/test_linkedlist.py diff --git a/linkedlist/is_cyclic.py b/linkedlist/is_cyclic.py index 7b9bb94b5..70d2c6616 100644 --- a/linkedlist/is_cyclic.py +++ b/linkedlist/is_cyclic.py @@ -4,16 +4,12 @@ Follow up: Can you solve it without using extra space? """ -import unittest - - class Node: def __init__(self, x): self.val = x self.next = None - def is_cyclic(head): """ :type head: Node @@ -29,39 +25,3 @@ def is_cyclic(head): if runner == walker: return True return False - - -class TestSuite(unittest.TestCase): - - def test_is_cyclic(self): - - # create linked list => A -> B -> C -> D -> E -> C - head = Node('A') - head.next = Node('B') - curr = head.next - - cyclic_node = Node('C') - curr.next = cyclic_node - - curr = curr.next - curr.next = Node('D') - curr = curr.next - curr.next = Node('E') - curr = curr.next - curr.next = cyclic_node - - self.assertTrue(is_cyclic(head)) - - # create linked list 1 -> 2 -> 3 -> 4 - head = Node(1) - curr = head - for i in range(2, 6): - curr.next = Node(i) - curr = curr.next - - self.assertFalse(is_cyclic(head)) - - -if __name__ == '__main__': - - unittest.main() diff --git a/linkedlist/is_sorted.py b/linkedlist/is_sorted.py index 501873983..978c5a69b 100644 --- a/linkedlist/is_sorted.py +++ b/linkedlist/is_sorted.py @@ -8,15 +8,6 @@ 1 2 3 4 :List is sorted 1 2 -1 3 :List is not sorted """ -import unittest - - -class Node: - def __init__(self, x): - self.val = x - self.next = None - - def is_sorted(head): if not head: return True @@ -26,31 +17,3 @@ def is_sorted(head): return False current = current.next return True - - -class TestSuite(unittest.TestCase): - - def test_is_sorted(self): - - head = Node(-2) - head.next = Node(2) - head.next.next = Node(2) - head.next.next.next = Node(4) - head.next.next.next.next = Node(9) - - # head -> -2 -> 2 -> 2 -> 4 -> 9 - self.assertTrue(is_sorted(head)) - - head = Node(1) - head.next = Node(2) - head.next.next = Node(8) - head.next.next.next = Node(4) - head.next.next.next.next = Node(6) - - # head -> 1 -> 2 -> 8 -> 4 -> 6 - self.assertFalse(is_sorted(head)) - - -if __name__ == "__main__": - - unittest.main() diff --git a/linkedlist/remove_range.py b/linkedlist/remove_range.py index b1a0e7f6e..ba7c1443e 100644 --- a/linkedlist/remove_range.py +++ b/linkedlist/remove_range.py @@ -9,12 +9,6 @@ legal range of the list (0 < start index < end index < size of list). """ - -class Node: - def __init__(self,x): - self.val = x - self.next = None - def remove_range(head, start, end): assert(start <= end) # Case: remove node at head @@ -32,29 +26,3 @@ def remove_range(head, start, end): if current != None and current.next != None: current.next = current.next.next return head - -if __name__ == "__main__": - # Test case: middle case. - head = Node(None) - head = Node(0) - head.next = Node(1) - head.next.next = Node(2) - head.next.next.next = Node(3) - head.next.next.next.next = Node(4) - result = remove_range(head,1,3) # Expect output: 0 4 - # Test case: taking out the front node - head = Node(None) - head = Node(0) - head.next = Node(1) - head.next.next = Node(2) - head.next.next.next = Node(3) - head.next.next.next.next = Node(4) - result = remove_range(head,0,1) # Expect output: 2 3 4 - # Test case: removing all the nodes - head = Node(None) - head = Node(0) - head.next = Node(1) - head.next.next = Node(2) - head.next.next.next = Node(3) - head.next.next.next.next = Node(4) - result = remove_range(head,0,7) # Expect output: Null diff --git a/linkedlist/reverse.py b/linkedlist/reverse.py index 93b40f42f..c41b81a8b 100644 --- a/linkedlist/reverse.py +++ b/linkedlist/reverse.py @@ -1,8 +1,10 @@ """ -Reverse a singly linked list. -""" - +Reverse a singly linked list. For example: +1 --> 2 --> 3 --> 4 +After reverse: +4 --> 3 --> 2 --> 1 +""" # # Iterative solution # T(n)- O(n) diff --git a/linkedlist/swap_in_pairs.py b/linkedlist/swap_in_pairs.py index ef0ed2eda..7f82f5b1e 100644 --- a/linkedlist/swap_in_pairs.py +++ b/linkedlist/swap_in_pairs.py @@ -9,37 +9,22 @@ You may not modify the values in the list, only nodes itself can be changed. """ - - -class Node: - def __init__(self, x=0): +class Node(object): + def __init__(self, x): self.val = x self.next = None - -def swap_pairs(head:"Node")->"Node": +def swap_pairs(head): if not head: return head - start = Node() - pre = start - pre.next = head - while pre.next and pre.next.next: - a = pre.next - b = pre.next.next - pre.next, a.next, b.next = b, b.next, a - pre = a + start = Node(0) + start.next = head + current = start + while current.next and current.next.next: + first = current.next + second = current.next.next + first.next = second.next + current.next = second + current.next.next = first + current = current.next.next return start.next - - -if __name__ == "__main__": - n = Node(1) - n.next = Node(2) - n.next.next = Node(3) - n.next.next.next = Node(4) - res = swap_pairs(n) - - while res: - print(res.val, end=" ") - res = res.next - print("should be 2 1 4 3 ") - diff --git a/linkedlist/test_linkedlist.py b/linkedlist/test_linkedlist.py new file mode 100644 index 000000000..a4dd9f707 --- /dev/null +++ b/linkedlist/test_linkedlist.py @@ -0,0 +1,124 @@ +from reverse import reverse_list, reverse_list_recursive +from is_sorted import is_sorted +from remove_range import remove_range +from swap_in_pairs import swap_pairs +from rotate_list import rotate_right +from is_cyclic import is_cyclic + +import unittest + +class Node(object): + def __init__(self, x): + self.val = x + self.next = None + +# Convert from linked list Node to list for testing +def convert(head): + ret = [] + if head: + current = head + while current: + ret.append(current.val) + current = current.next + return ret + +class TestSuite(unittest.TestCase): + def test_reverse_list(self): + head = Node(1) + head.next = Node(2) + head.next.next = Node(3) + head.next.next.next = Node(4) + self.assertEqual([4, 3, 2, 1], convert(reverse_list(head))) + head = Node(1) + head.next = Node(2) + head.next.next = Node(3) + head.next.next.next = Node(4) + self.assertEqual([4, 3, 2, 1], convert(reverse_list_recursive(head))) + + def test_is_sorted(self): + head = Node(-2) + head.next = Node(2) + head.next.next = Node(2) + head.next.next.next = Node(4) + head.next.next.next.next = Node(9) + # head -> -2 -> 2 -> 2 -> 4 -> 9 + self.assertTrue(is_sorted(head)) + head = Node(1) + head.next = Node(2) + head.next.next = Node(8) + head.next.next.next = Node(4) + head.next.next.next.next = Node(6) + # head -> 1 -> 2 -> 8 -> 4 -> 6 + self.assertFalse(is_sorted(head)) + + def test_remove_range(self): + + # Test case: middle case. + head = Node(0) + head.next = Node(1) + head.next.next = Node(2) + head.next.next.next = Node(3) + head.next.next.next.next = Node(4) + # Expect output: 0 4 + self.assertEqual([0, 4], convert(remove_range(head, 1, 3))) + + # Test case: taking out the front node + head = Node(0) + head.next = Node(1) + head.next.next = Node(2) + head.next.next.next = Node(3) + head.next.next.next.next = Node(4) + # Expect output: 2 3 4 + self.assertEqual([2, 3, 4], convert(remove_range(head, 0, 1))) + + # Test case: removing all the nodes + head = Node(0) + head.next = Node(1) + head.next.next = Node(2) + head.next.next.next = Node(3) + head.next.next.next.next = Node(4) + self.assertEqual([], convert(remove_range(head, 0, 7))) + + def test_swap_in_pairs(self): + head = Node(1) + head.next = Node(2) + head.next.next = Node(3) + head.next.next.next = Node(4) + # Expect output : 2 --> 1 --> 4 --> 3 + self.assertEqual([2, 1, 4, 3], convert(swap_pairs(head))) + + def test_rotate_right(self): + # Given 1->2->3->4->5->NULL + head = Node(1) + head.next = Node(2) + head.next.next = Node(3) + head.next.next.next = Node(4) + head.next.next.next.next = Node(5) + # K = 2. Expect output: 4->5->1->2->3->NULL. + self.assertEqual([4, 5, 1, 2, 3], convert(rotate_right(head, 2))) + + def test_is_cyclic(self): + # create linked list => A -> B -> C -> D -> E -> C + head = Node('A') + head.next = Node('B') + curr = head.next + cyclic_node = Node('C') + curr.next = cyclic_node + curr = curr.next + curr.next = Node('D') + curr = curr.next + curr.next = Node('E') + curr = curr.next + curr.next = cyclic_node + self.assertTrue(is_cyclic(head)) + + # create linked list 1 -> 2 -> 3 -> 4 + head = Node(1) + curr = head + for i in range(2, 6): + curr.next = Node(i) + curr = curr.next + self.assertFalse(is_cyclic(head)) + +if __name__ == "__main__": + unittest.main() From 0cb514e9176b3378dd4cf7dabfcac7762f47c28c Mon Sep 17 00:00:00 2001 From: danghai Date: Mon, 16 Apr 2018 23:12:21 -0700 Subject: [PATCH 239/387] Add merge_two_list to linkedlist --- linkedlist/merge_two_list.py | 37 +++++++++++++++++++++++++++++++++++ linkedlist/test_linkedlist.py | 24 +++++++++++++++++++++++ 2 files changed, 61 insertions(+) create mode 100644 linkedlist/merge_two_list.py diff --git a/linkedlist/merge_two_list.py b/linkedlist/merge_two_list.py new file mode 100644 index 000000000..6be44f33e --- /dev/null +++ b/linkedlist/merge_two_list.py @@ -0,0 +1,37 @@ +""" +Merge two sorted linked lists and return it as a new list. The new list should +be made by splicing together the nodes of the first two lists. + +For example: +Input: 1->2->4, 1->3->4 +Output: 1->1->2->3->4->4 +""" +class Node: + + def __init__(self, x): + self.val = x + self.next = None + +def merge_two_list(l1, l2): + ret = cur = Node(0) + while l1 and l2: + if l1.val < l2.val: + cur.next = l1 + l1 = l1.next + else: + cur.next = l2 + l2 = l2.next + cur = cur.next + cur.next = l1 or l2 + return ret.next + +# recursively +def merge_two_list_recur(l1, l2): + if not l1 or not l2: + return l1 or l2 + if l1.val < l2.val: + l1.next = merge_two_list_recur(l1.next, l2) + return l1 + else: + l2.next = merge_two_list_recur(l1, l2.next) + return l2 diff --git a/linkedlist/test_linkedlist.py b/linkedlist/test_linkedlist.py index a4dd9f707..11dd81423 100644 --- a/linkedlist/test_linkedlist.py +++ b/linkedlist/test_linkedlist.py @@ -4,6 +4,7 @@ from swap_in_pairs import swap_pairs from rotate_list import rotate_right from is_cyclic import is_cyclic +from merge_two_list import merge_two_list, merge_two_list_recur import unittest @@ -120,5 +121,28 @@ def test_is_cyclic(self): curr = curr.next self.assertFalse(is_cyclic(head)) + def test_merge_two_list(self): + """ + Input: head1:1->2->4, head2: 1->3->4 + Output: 1->1->2->3->4->4 + """ + head1 = Node(1) + head1.next = Node(2) + head1.next.next = Node(4) + head2 = Node(1) + head2.next = Node(3) + head2.next.next = Node(4) + self.assertEqual([1, 1, 2, 3, 4, 4], + convert(merge_two_list(head1, head2))) + # Test recursive + head1 = Node(1) + head1.next = Node(2) + head1.next.next = Node(4) + head2 = Node(1) + head2.next = Node(3) + head2.next.next = Node(4) + self.assertEqual([1, 1, 2, 3, 4, 4], + convert(merge_two_list_recur(head1, head2))) + if __name__ == "__main__": unittest.main() From 1d43123a0fb7c39341ea55507d22406c87b5be39 Mon Sep 17 00:00:00 2001 From: danghai Date: Mon, 16 Apr 2018 23:37:40 -0700 Subject: [PATCH 240/387] Add separate test for is_palindrome --- linkedlist/test_linkedlist.py | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/linkedlist/test_linkedlist.py b/linkedlist/test_linkedlist.py index 11dd81423..dcfad5568 100644 --- a/linkedlist/test_linkedlist.py +++ b/linkedlist/test_linkedlist.py @@ -5,6 +5,7 @@ from rotate_list import rotate_right from is_cyclic import is_cyclic from merge_two_list import merge_two_list, merge_two_list_recur +from is_palindrome import is_palindrome, is_palindrome_stack, is_palindrome_dict import unittest @@ -24,6 +25,19 @@ def convert(head): return ret class TestSuite(unittest.TestCase): + def setUp(self): + # list test for palindrome + self.l = Node('A') + self.l.next = Node('B') + self.l.next.next = Node('C') + self.l.next.next.next = Node('B') + self.l.next.next.next.next = Node('A') + + self.l1 = Node('A') + self.l1.next = Node('B') + self.l1.next.next = Node('C') + self.l1.next.next.next = Node('B') + def test_reverse_list(self): head = Node(1) head.next = Node(2) @@ -144,5 +158,15 @@ def test_merge_two_list(self): self.assertEqual([1, 1, 2, 3, 4, 4], convert(merge_two_list_recur(head1, head2))) + def test_is_palindrome(self): + self.assertTrue(is_palindrome(self.l)) + self.assertFalse(is_palindrome(self.l1)) + def test_is_palindrome_stack(self): + self.assertTrue(is_palindrome_stack(self.l)) + self.assertFalse(is_palindrome_stack(self.l1)) + def test_is_palindrome_dict(self): + self.assertTrue(is_palindrome_dict(self.l)) + self.assertFalse(is_palindrome_dict(self.l1)) + if __name__ == "__main__": unittest.main() From 2e350115639cb0f88085548c59b61569e5a0f9ee Mon Sep 17 00:00:00 2001 From: Sa'd Date: Tue, 17 Apr 2018 06:35:27 -0500 Subject: [PATCH 241/387] Add algorithm that tests knowledge of strings (#234) * Add a function that validates latitude and longitude. * Update README.md by adding validate_coordinates.py * Fix indentation error * Fix indentation errors and follow PEP8 * Add import statement for unittest * Fix function names * Add delete_reocurring_characters * Update README.md by adding delete_reoccuring_char * Add PR review changes --- README.md | 2 + strings/delete_reoccurring.py | 19 ++++++++++ strings/validate_coordinates.py | 67 +++++++++++++++++++++++++++++++++ 3 files changed, 88 insertions(+) create mode 100644 strings/delete_reoccurring.py create mode 100644 strings/validate_coordinates.py diff --git a/README.md b/README.md index 7db62fbc6..65fbc2ab3 100644 --- a/README.md +++ b/README.md @@ -188,7 +188,9 @@ To run the tests, clone the repo and run : - [remove_min](stack/remove_min.py) - [is_sorted](stack/is_sorted.py) - [strings](strings) + - [delete_reoccurring_characters](strings/delete_reoccurring_characters.py) - [strip_url_params](strings/strip_url_params.py) + - [validate_coordinates](strings/validate_coordinates.py) - [domain_extractor](strings/domain_extractor.py) - [merge_string_checker](strings/merge_string_checker.py) - [add_binary](strings/add_binary.py) diff --git a/strings/delete_reoccurring.py b/strings/delete_reoccurring.py new file mode 100644 index 000000000..131a953b9 --- /dev/null +++ b/strings/delete_reoccurring.py @@ -0,0 +1,19 @@ +""" +QUESTION: Given a string as your input, delete any reoccurring +character, and return the new string. + +This is a Google warmup interview question that was asked duirng phone screening +at my university. +""" + +# time complexity O(n) +def delete_reoccurring_characters(string): + seen_characters = set() + output_string = '' + for char in string: + if char not in seen_characters: + seen_characters.add(char) + output_string += char + return output_string + + \ No newline at end of file diff --git a/strings/validate_coordinates.py b/strings/validate_coordinates.py new file mode 100644 index 000000000..8ae2dfbde --- /dev/null +++ b/strings/validate_coordinates.py @@ -0,0 +1,67 @@ +"""" +Create a function that will validate if given parameters are valid geographical coordinates. +Valid coordinates look like the following: "23.32353342, -32.543534534". The return value should be either true or false. +Latitude (which is first float) can be between 0 and 90, positive or negative. Longitude (which is second float) can be between 0 and 180, positive or negative. +Coordinates can only contain digits, or one of the following symbols (including space after comma) -, . +There should be no space between the minus "-" sign and the digit after it. + +Here are some valid coordinates: +-23, 25 +43.91343345, 143 +4, -3 + +And some invalid ones: +23.234, - 23.4234 +N23.43345, E32.6457 +6.325624, 43.34345.345 +0, 1,2 + +""" +# I'll be adding my attempt as well as my friend's solution (took us ~ 1 hour) + +# my attempt +import re +def is_valid_coordinates_0(coordinates): + for char in coordinates: + if not (char.isdigit() or char in ['-', '.', ',', ' ']): + return False + l = coordinates.split(", ") + if len(l) != 2: + return False + print(l) + try: + latitude = float(l[0]) + longitude = float(l[1]) + except: + return False + print(latitude, longitude) + return -90 <= latitude <= 90 and -180 <= longitude <= 180 + +# friends solutions +def is_valid_coordinates_1(coordinates): + try: + lat, lng = [abs(float(c)) for c in coordinates.split(',') if 'e' not in c] + except ValueError: + return False + + return lat <= 90 and lng <= 180 + +# using regular expression +def is_valid_coordinates_regular_expression(coordinates): + return bool(re.match("-?(\d|[1-8]\d|90)\.?\d*, -?(\d|[1-9]\d|1[0-7]\d|180)\.?\d*$", coordinates)) + +import unittest +class TestSuite(unittest.TestCase): + def test_valid(self): + valid_coordinates = ["-23, 25","4, -3","90, 180","-90, -180"] + for coordinate in valid_coordinates: + self.assertTrue(is_valid_coordinates_0(coordinate)) + + def test_invalid(self): + invalid_coordinates = ["23.234, - 23.4234","99.234, 12.324","6.325624, 43.34345.345","0, 1,2","23.245, 1e1"] + for coordinate in invalid_coordinates: + self.assertFalse(is_valid_coordinates_0(coordinate)) + + +if __name__ == "__main__": + unittest.main() From 3531d9c04c877c0b195604c8ddf998fc766fff35 Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Tue, 17 Apr 2018 04:37:44 -0700 Subject: [PATCH 242/387] Separate test for search, and add some problem (#233) * Separate test for search * Add search_insert to search * Add two_sum to search * Add search_range to search * Add binary search recursion to search * Add find_min_rotate to search * Add search_rotate to search * Add problem search to README.md --- README.md | 5 +++ search/binary_search.py | 28 +++++------- search/find_min_rotate.py | 28 ++++++++++++ search/first_occurance.py | 24 +---------- search/last_occurance.py | 33 +------------- search/search_insert.py | 20 +++++++++ search/search_range.py | 33 ++++++++++++++ search/search_rotate.py | 78 +++++++++++++++++++++++++++++++++ search/test_search.py | 91 +++++++++++++++++++++++++++++++++++++++ search/two_sum.py | 51 ++++++++++++++++++++++ 10 files changed, 318 insertions(+), 73 deletions(-) create mode 100644 search/find_min_rotate.py create mode 100644 search/search_insert.py create mode 100644 search/search_range.py create mode 100644 search/search_rotate.py create mode 100644 search/test_search.py create mode 100644 search/two_sum.py diff --git a/README.md b/README.md index 65fbc2ab3..c14d6bb57 100644 --- a/README.md +++ b/README.md @@ -161,6 +161,11 @@ To run the tests, clone the repo and run : - [binary_search](search/binary_search.py) - [first_occurance](search/first_occurance.py) - [last_occurance](search/last_occurance.py) + - [search_insert](search/search_insert.py) + - [two_sum](search/two_sum.py) + - [search_range](search/search_range.py) + - [find_min_rotate](search/find_min_rotate.py) + - [search_rotate](search/search_rotate.py) - [set](set) - [randomized_set](set/randomized_set.py) - [set_covering](set/set_covering.py) diff --git a/search/binary_search.py b/search/binary_search.py index b47bae1cd..644f98f8e 100644 --- a/search/binary_search.py +++ b/search/binary_search.py @@ -4,8 +4,6 @@ # increasing order. # T(n): O(log n) # - - def binary_search(array, query): lo, hi = 0, len(array) - 1 while lo <= hi: @@ -19,19 +17,13 @@ def binary_search(array, query): hi = mid - 1 return None - -def main(): - array = [1, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 6] - print(array) - print("-----SEARCH-----") - print("found: ", 5, " in index:", binary_search(array, 5)) - print("-----SEARCH-----") - print("found: ", 6, " in index:", binary_search(array, 6)) - print("-----SEARCH-----") - print("found: ", 7, " in index:", binary_search(array, 7)) - print("-----SEARCH-----") - print("found: ", -1, " in index:", binary_search(array, -1)) - print("-----SEARCH-----") - -if __name__ == "__main__": - main() +def binary_search_recur(array, low, high, val): + if low > high: # error case + return -1 + mid = (low + high) // 2 + if val < array[mid]: + return binary_search_recur(array, low, mid - 1, val) + elif val > array[mid]: + return binary_search_recur(array, mid + 1, high, val) + else: + return mid diff --git a/search/find_min_rotate.py b/search/find_min_rotate.py new file mode 100644 index 000000000..1afc4eef2 --- /dev/null +++ b/search/find_min_rotate.py @@ -0,0 +1,28 @@ +""" +Suppose an array sorted in ascending order is rotated at some pivot unknown +to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). + +Find the minimum element. The complexity must be O(logN) + +You may assume no duplicate exists in the array. +""" +def find_min_rotate(array): + low = 0 + high = len(array) - 1 + while low < high: + mid = (low + high) // 2 + if array[mid] > array[high]: + low = mid + 1 + else: + high = mid + + return array[low] + +def find_min_rotate_recur(array, low, high): + mid = (low + high) // 2 + if mid == low: + return array[low] + elif array[mid] > array[high]: + return find_min_rotate_recur(array, mid + 1, high) + else: + return find_min_rotate_recur(array, low, mid) diff --git a/search/first_occurance.py b/search/first_occurance.py index f4d8c7526..addf17058 100644 --- a/search/first_occurance.py +++ b/search/first_occurance.py @@ -3,10 +3,7 @@ # Approach- Binary Search # T(n)- O(log n) # - -import unittest - -def firstOccurance(array, query): +def first_occurance(array, query): lo, hi = 0, len(array) - 1 while lo <= hi: mid = (lo + hi) // 2 @@ -19,22 +16,3 @@ def firstOccurance(array, query): hi = mid if array[lo] == query: return lo - -class TestSuite(unittest.TestCase): - - def test_firstOccurance(self): - def helper(array, query): - idx = array.index(query) if query in array else None - return idx - array = [1, 1, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 6, 6, 6] - self.assertEqual(firstOccurance(array, 1), helper(array, 1)) - self.assertEqual(firstOccurance(array, 3), helper(array, 3)) - self.assertEqual(firstOccurance(array, 5), helper(array, 5)) - self.assertEqual(firstOccurance(array, 6), helper(array, 6)) - self.assertEqual(firstOccurance(array, 7), helper(array, 7)) - self.assertEqual(firstOccurance(array, -1), helper(array, -1)) - - -if __name__ == '__main__': - - unittest.main() diff --git a/search/last_occurance.py b/search/last_occurance.py index e9b705d20..b8ee4fa62 100644 --- a/search/last_occurance.py +++ b/search/last_occurance.py @@ -3,9 +3,7 @@ # Approach- Binary Search # T(n)- O(log n) # - - -def lastOccurance(array, query): +def last_occurance(array, query): lo, hi = 0, len(array) - 1 while lo <= hi: mid = (hi + lo) // 2 @@ -16,32 +14,3 @@ def lastOccurance(array, query): lo = mid + 1 else: hi = mid - 1 - - -def main(): - array = [1, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 6, 6, 6] - print(array) - print("-----SEARCH-----") - query = 3 - print("found last: ", query, " in index:", lastOccurance(array, query)) - print("-----SEARCH-----") - query = 5 - print("found last: ", query, " in index:", lastOccurance(array, query)) - print("-----SEARCH-----") - query = 7 - print("found last: ", query, " in index:", lastOccurance(array, query)) - print("-----SEARCH-----") - query = 1 - print("found last: ", query, " in index:", lastOccurance(array, query)) - print("-----SEARCH-----") - query = -1 - print("found last: ", query, " in index:", lastOccurance(array, query)) - print("-----SEARCH-----") - query = 9 - print("found last: ", query, " in index:", lastOccurance(array, query)) - print("-----SEARCH-----") - query = 6 - print("found last: ", query, " in index:", lastOccurance(array, query)) - -if __name__ == "__main__": - main() diff --git a/search/search_insert.py b/search/search_insert.py new file mode 100644 index 000000000..b10eb7d5f --- /dev/null +++ b/search/search_insert.py @@ -0,0 +1,20 @@ +""" +Given a sorted array and a target value, return the index if the target is +found. If not, return the index where it would be if it were inserted in order. + +For example: +[1,3,5,6], 5 -> 2 +[1,3,5,6], 2 -> 1 +[1,3,5,6], 7 -> 4 +[1,3,5,6], 0 -> 0 +""" +def search_insert(array, val): + low = 0 + high = len(array) - 1 + while low <= high: + mid = low + (high - low) // 2 + if val > array[mid]: + low = mid + 1 + else: + high = mid - 1 + return low diff --git a/search/search_range.py b/search/search_range.py new file mode 100644 index 000000000..116d8f541 --- /dev/null +++ b/search/search_range.py @@ -0,0 +1,33 @@ +""" +Given an array of integers nums sorted in ascending order, find the starting +and ending position of a given target value. If the target is not found in the +array, return [-1, -1]. + +For example: +Input: nums = [5,7,7,8,8,8,10], target = 8 +Output: [3,5] +Input: nums = [5,7,7,8,8,8,10], target = 11 +Output: [-1,-1] +""" +def search_range(nums, target): + """ + :type nums: List[int] + :type target: int + :rtype: List[int] + """ + low = 0 + high = len(nums) - 1 + while low <= high: + mid = low + (high - low) // 2 + if target < nums[mid]: + high = mid - 1 + elif target > nums[mid]: + low = mid + 1 + else: + break + + for j in range(len(nums) - 1, -1, -1): + if nums[j] == target: + return [mid, j] + + return [-1, -1] diff --git a/search/search_rotate.py b/search/search_rotate.py new file mode 100644 index 000000000..ade027082 --- /dev/null +++ b/search/search_rotate.py @@ -0,0 +1,78 @@ +""" +Search in Rotated Sorted Array +Suppose an array sorted in ascending order is rotated at some pivot unknown +to you beforehand. (i.e., [0,1,2,4,5,6,7] might become [4,5,6,7,0,1,2]). + +You are given a target value to search. If found in the array return its index, +otherwise return -1. + +Your algorithm's runtime complexity must be in the order of O(log n). +--------------------------------------------------------------------------------- +Explanation algorithm: + +In classic binary search, we compare val with the midpoint to figure out if +val belongs on the low or the high side. The complication here is that the +array is rotated and may have an inflection point. Consider, for example: + +Array1: [10, 15, 20, 0, 5] +Array2: [50, 5, 20, 30, 40] + +Note that both arrays have a midpoint of 20, but 5 appears on the left side of +one and on the right side of the other. Therefore, comparing val with the +midpoint is insufficient. + +However, if we look a bit deeper, we can see that one half of the array must be +ordered normally(increasing order). We can therefore look at the normally ordered +half to determine whether we should search the low or hight side. + +For example, if we are searching for 5 in Array1, we can look at the left element (10) +and middle element (20). Since 10 < 20, the left half must be ordered normally. And, since 5 +is not between those, we know that we must search the right half + +In array2, we can see that since 50 > 20, the right half must be ordered normally. We turn to +the middle 20, and right 40 element to check if 5 would fall between them. The value 5 would not +Therefore, we search the left half. + +There are 2 possible solution: iterative and recursion. +Recursion helps you understand better the above algorithm explanation +""" +def search_rotate(array, val): + if not array: + return -1 + + low, high = 0, len(array) - 1 + while low <= high: + mid = (low + high) // 2 + if val == array[mid]: + return mid + + if array[low] <= array[mid]: + if array[low] <= val <= array[mid]: + high = mid - 1 + else: + low = mid + 1 + else: + if array[mid] <= val <= array[high]: + low = mid + 1 + else: + high = mid - 1 + + return -1 + +# Recursion technique +def search_rotate_recur(array, low, high, val): + if low >= high: + return -1 + mid = (low + high) // 2 + if val == array[mid]: # found element + return mid + if array[low] <= array[mid]: + if array[low] <= val <= array[mid]: + return search_rotate_recur(array, low, mid - 1, val) # Search left + else: + return search_rotate_recur(array, mid + 1, high, val) # Search right + else: + if array[mid] <= val <= array[high]: + return search_rotate_recur(array, mid + 1, high, val) # Search right + else: + return search_rotate_recur(array, low, mid - 1, val) # Search left diff --git a/search/test_search.py b/search/test_search.py new file mode 100644 index 000000000..851f8a6c1 --- /dev/null +++ b/search/test_search.py @@ -0,0 +1,91 @@ +from binary_search import binary_search, binary_search_recur +from first_occurance import first_occurance +from last_occurance import last_occurance +from search_insert import search_insert +from two_sum import two_sum, two_sum1, two_sum2 +from search_range import search_range +from find_min_rotate import find_min_rotate, find_min_rotate_recur +from search_rotate import search_rotate, search_rotate_recur + +import unittest + +class TestSuite(unittest.TestCase): + + def test_first_occurance(self): + def helper(array, query): + idx = array.index(query) if query in array else None + return idx + array = [1, 1, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 6, 6, 6] + self.assertEqual(first_occurance(array, 1), helper(array, 1)) + self.assertEqual(first_occurance(array, 3), helper(array, 3)) + self.assertEqual(first_occurance(array, 5), helper(array, 5)) + self.assertEqual(first_occurance(array, 6), helper(array, 6)) + self.assertEqual(first_occurance(array, 7), helper(array, 7)) + self.assertEqual(first_occurance(array, -1), helper(array, -1)) + + def test_binary_search(self): + array = [1, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 6] + self.assertEqual(10, binary_search(array, 5)) + self.assertEqual(11, binary_search(array, 6)) + self.assertEqual(None, binary_search(array, 7)) + self.assertEqual(None, binary_search(array, -1)) + # Test binary_search_recur + self.assertEqual(10, binary_search_recur(array, 0, 11, 5)) + self.assertEqual(11, binary_search_recur(array, 0, 11, 6)) + self.assertEqual(-1, binary_search_recur(array, 0, 11, 7)) + self.assertEqual(-1, binary_search_recur(array, 0, 11, -1)) + + def test_last_occurance(self): + array = [1, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 6, 6, 6] + self.assertEqual(5, last_occurance(array, 3)) + self.assertEqual(10, last_occurance(array, 5)) + self.assertEqual(None, last_occurance(array, 7)) + self.assertEqual(0, last_occurance(array, 1)) + self.assertEqual(13, last_occurance(array, 6)) + + def test_search_insert(self): + array = [1,3,5,6] + self.assertEqual(2, search_insert(array, 5)) + self.assertEqual(1, search_insert(array, 2)) + self.assertEqual(4, search_insert(array, 7)) + self.assertEqual(0, search_insert(array, 0)) + + def test_two_sum(self): + array = [2, 7, 11, 15] + # test two_sum + self.assertEqual([1, 2], two_sum(array, 9)) + self.assertEqual([2, 4], two_sum(array, 22)) + # test two_sum1 + self.assertEqual([1, 2], two_sum1(array, 9)) + self.assertEqual([2, 4], two_sum1(array, 22)) + # test two_sum2 + self.assertEqual([1, 2], two_sum2(array, 9)) + self.assertEqual([2, 4], two_sum2(array, 22)) + + def test_search_range(self): + array = [5, 7, 7, 8, 8, 8, 10] + self.assertEqual([3, 5], search_range(array, 8)) + self.assertEqual([1, 2], search_range(array, 7)) + self.assertEqual([-1, -1], search_range(array, 11)) + + def test_find_min_rotate(self): + array = [4, 5, 6, 7, 0, 1, 2] + self.assertEqual(0, find_min_rotate(array)) + array = [10, 20, -1, 0, 1, 2, 3, 4, 5] + self.assertEqual(-1, find_min_rotate(array)) + # Test find min using recursion + array = [4, 5, 6, 7, 0, 1, 2] + self.assertEqual(0, find_min_rotate_recur(array, 0, 6)) + array = [10, 20, -1, 0, 1, 2, 3, 4, 5] + self.assertEqual(-1, find_min_rotate_recur(array, 0, 8)) + + def test_search_rotate(self): + array = [15, 16, 19, 20, 25, 1, 3, 4, 5, 7, 10, 14] + self.assertEqual(8, search_rotate(array, 5)) + self.assertEqual(-1, search_rotate(array, 9)) + self.assertEqual(8, search_rotate_recur(array, 0, 11, 5)) + self.assertEqual(-1, search_rotate_recur(array, 0, 11, 9)) + +if __name__ == '__main__': + + unittest.main() diff --git a/search/two_sum.py b/search/two_sum.py new file mode 100644 index 000000000..4251e5378 --- /dev/null +++ b/search/two_sum.py @@ -0,0 +1,51 @@ +""" +Given an array of integers that is already sorted in ascending order, find two +numbers such that they add up to a specific target number. The function two_sum +should return indices of the two numbers such that they add up to the target, +where index1 must be less than index2. Please note that your returned answers +(both index1 and index2) are not zero-based. +You may assume that each input would have exactly one solution and you +may not use the same element twice. + +Input: numbers = [2, 7, 11, 15], target=9 +Output: index1 = 1, index2 = 2 + +Solution: +two_sum: using binary search +two_sum1: using dictionary as a hash table +two_sum2: using two pointers +""" +# Using binary search technique +def two_sum(numbers, target): + for i in range(len(numbers)): + second_val = target - numbers[i] + low, high = i+1, len(numbers)-1 + while low <= high: + mid = low + (high - low) // 2 + if second_val == numbers[mid]: + return [i + 1, mid + 1] + elif second_val > numbers[mid]: + low = mid + 1 + else: + high = mid - 1 + +# Using dictionary as a hash table +def two_sum1(numbers, target): + dic = {} + for i, num in enumerate(numbers): + if target - num in dic: + return [dic[target - num] + 1, i + 1] + dic[num] = i + +# Using two pointers +def two_sum2(numbers, target): + p1 = 0 # pointer 1 holds from left of array numbers + p2 = len(numbers) - 1 # pointer 2 holds from right of array numbers + while p1 < p2: + s = numbers[p1] + numbers[p2] + if s == target: + return [p1 + 1, p2 + 1] + elif s > target: + p2 = p2 - 1 + else: + p1 = p1 + 1 From 7f4e4afbc8b7ba27087ff91be566757d756ae289 Mon Sep 17 00:00:00 2001 From: mecforlove Date: Fri, 20 Apr 2018 13:41:06 +0800 Subject: [PATCH 243/387] Add SeparateChainingHashTable implementation (#236) * Add SeparateChainingHashTable implementation * Optimize the SeparateChainingHashTable code * Update Readme docs --- README.md | 1 + README_CN.md | 1 + map/separate_chaining_hashtable.py | 143 +++++++++++++++++++++++++++++ 3 files changed, 145 insertions(+) create mode 100644 map/separate_chaining_hashtable.py diff --git a/README.md b/README.md index c14d6bb57..fc7f1243d 100644 --- a/README.md +++ b/README.md @@ -121,6 +121,7 @@ To run the tests, clone the repo and run : - [remove_range](linkedlist/remove_range.py) - [map](map) - [hashtable](map/hashtable.py) + - [separate_chaining_hashtable](map/separate_chaining_hashtable.py) - [longest_common_subsequence](map/longest_common_subsequence.py) - [randomized_set](map/randomized_set.py) - [valid_sudoku](map/valid_sudoku.py) diff --git a/README_CN.md b/README_CN.md index d1fd193de..08edaf258 100644 --- a/README_CN.md +++ b/README_CN.md @@ -96,6 +96,7 @@ python版数据结构和算法实现的简约版小示例 - [swap_in_pairs：链表节点交换](linkedlist/swap_in_pairs.py) - [map：映射](map) - [hashtable：哈希表](map/hashtable.py) + - [separate_chaining_hashtable：拉链法哈希表](map/separate_chaining_hashtable.py) - [longest_common_subsequence：最长公共子序列](map/longest_common_subsequence.py) - [randomized_set：随机集](map/randomized_set.py) - [valid_sudoku：有效数独](map/valid_sudoku.py) diff --git a/map/separate_chaining_hashtable.py b/map/separate_chaining_hashtable.py new file mode 100644 index 000000000..5feb50af8 --- /dev/null +++ b/map/separate_chaining_hashtable.py @@ -0,0 +1,143 @@ +import unittest + + +class Node(object): + def __init__(self, key=None, value=None, next=None): + self.key = key + self.value = value + self.next = next + + +class SeparateChainingHashTable(object): + """ + HashTable Data Type: + By having each bucket contain a linked list of elements that are hashed to that bucket. + + Usage: + >>> table = SeparateChainingHashTable() # Create a new, empty map. + >>> table.put('hello', 'world') # Add a new key-value pair. + >>> len(table) # Return the number of key-value pairs stored in the map. + 1 + >>> table.get('hello') # Get value by key. + 'world' + >>> del table['hello'] # Equivalent to `table.del_('hello')`, deleting key-value pair. + >>> table.get('hello') is None # Return `None` if a key doesn't exist. + True + """ + _empty = None + + def __init__(self, size=11): + self.size = size + self._len = 0 + self._table = [self._empty] * size + + def put(self, key, value): + hash_ = self.hash(key) + node_ = self._table[hash_] + if node_ is self._empty: + self._table[hash_] = Node(key, value) + else: + while node_.next is not None: + if node_.key == key: + node_.value = value + return + node_ = node_.next + node_.next = Node(key, value) + self._len += 1 + + def get(self, key): + hash_ = self.hash(key) + node_ = self._table[hash_] + while node_ is not self._empty: + if node_.key == key: + return node_.value + node_ = node_.next + return None + + def del_(self, key): + hash_ = self.hash(key) + node_ = self._table[hash_] + pre_node = None + while node_ is not None: + if node_.key == key: + if pre_node is None: + self._table[hash_] = node_.next + else: + pre_node.next = node_.next + self._len -= 1 + pre_node = node_ + node_ = node_.next + + def hash(self, key): + return hash(key) % self.size + + def __len__(self): + return self._len + + def __getitem__(self, key): + return self.get(key) + + def __delitem__(self, key): + return self.del_(key) + + def __setitem__(self, key, value): + self.put(key, value) + + +class TestSeparateChainingHashTable(unittest.TestCase): + def test_one_entry(self): + m = SeparateChainingHashTable(10) + m.put(1, '1') + self.assertEqual('1', m.get(1)) + + def test_two_entries_with_same_hash(self): + m = SeparateChainingHashTable(10) + m.put(1, '1') + m.put(11, '11') + self.assertEqual('1', m.get(1)) + self.assertEqual('11', m.get(11)) + + def test_len_trivial(self): + m = SeparateChainingHashTable(10) + self.assertEqual(0, len(m)) + for i in range(10): + m.put(i, i) + self.assertEqual(i + 1, len(m)) + + def test_len_after_deletions(self): + m = SeparateChainingHashTable(10) + m.put(1, 1) + self.assertEqual(1, len(m)) + m.del_(1) + self.assertEqual(0, len(m)) + m.put(11, 42) + self.assertEqual(1, len(m)) + + def test_delete_key(self): + m = SeparateChainingHashTable(10) + for i in range(5): + m.put(i, i**2) + m.del_(1) + self.assertEqual(None, m.get(1)) + self.assertEqual(4, m.get(2)) + + def test_delete_key_and_reassign(self): + m = SeparateChainingHashTable(10) + m.put(1, 1) + del m[1] + m.put(1, 2) + self.assertEqual(2, m.get(1)) + + def test_add_entry_bigger_than_table_size(self): + m = SeparateChainingHashTable(10) + m.put(11, '1') + self.assertEqual('1', m.get(11)) + + def test_get_none_if_key_missing_and_hash_collision(self): + m = SeparateChainingHashTable(10) + m.put(1, '1') + self.assertEqual(None, m.get(11)) + + +if __name__ == '__main__': + unittest.main() From f71d1d21e8f1e0f77fdcac3632a1ee22a56781f7 Mon Sep 17 00:00:00 2001 From: Sa'd Date: Fri, 20 Apr 2018 21:35:53 -0500 Subject: [PATCH 244/387] Add is_palindrome variations (#238) * Add variations to is_palindrome.py --- strings/is_palindrome.py | 47 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/strings/is_palindrome.py b/strings/is_palindrome.py index d9b23b653..aa7203a01 100644 --- a/strings/is_palindrome.py +++ b/strings/is_palindrome.py @@ -31,3 +31,50 @@ def is_palindrome(s): return False i, j = i+1, j-1 return True + + +""" +Here is a bunch of other variations of is_palindrome function. + +Variation 1: +Find the reverse of the string and compare it with the original string + +Variation 2: +Loop from the start to length/2 and check the first character and last character +and so on... for instance s[0] compared with s[n-1], s[1] == s[n-2]... + +Variation 3: +Using stack idea. +Note: We are assuming that we are just checking a one word string. To check if a complete sentence + +""" + +# Variation 1 +def string_reverse(s): + return s[::-1] + +def is_palidrome_reverse(s): + reversed_string = string_reverse(s) + + # can also get rid of the string_reverse function and just do this return s == s[::-1] in one line. + if (s == reversed_string): + return True + return False + + +# Variation 2 +def is_palidrome_two_pointer(s): + for i in range(0, len(s)//2): + if (s[i] != s[len(s) - i - 1]): + return False + return True + +# Variation 3 +def is_palindrome_stack(s): + stack = [] + for i in range(len(s)//2, len(s)): + stack.append(s[i]) + for i in range(0, len(s)//2): + if s[i] != stack.pop(): + return False + return True From 6731c211ab00058bce0072e61aef8eb00b0b9ea3 Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Sat, 21 Apr 2018 05:53:45 -0700 Subject: [PATCH 245/387] Move all test into a separate test folder (#239) * Move all test into tests folder * Add unittest in travis * Add the way testing to README * Add __init__ for each folder test * Add pytest to README and travis * move test_search to tests * move test_array to tests --- .travis.yml | 7 +++++-- README.md | 16 ++++++++++++++-- bit/__init__.py | 0 linkedlist/__init__.py | 0 search/__init__.py | 0 sort/__init__.py | 0 tests/__init__.py | 0 {array => tests}/test_array.py | 0 {bit => tests}/test_bit.py | 16 ++++++++-------- {linkedlist => tests}/test_linkedlist.py | 16 ++++++++-------- {search => tests}/test_search.py | 16 ++++++++-------- {sort => tests}/test_sort.py | 16 ++++++++-------- 12 files changed, 51 insertions(+), 36 deletions(-) create mode 100644 bit/__init__.py create mode 100644 linkedlist/__init__.py create mode 100644 search/__init__.py create mode 100644 sort/__init__.py create mode 100644 tests/__init__.py rename {array => tests}/test_array.py (100%) rename {bit => tests}/test_bit.py (90%) rename {linkedlist => tests}/test_linkedlist.py (91%) rename {search => tests}/test_search.py (88%) rename {sort => tests}/test_sort.py (82%) diff --git a/.travis.yml b/.travis.yml index 0729d7ea9..88334304b 100644 --- a/.travis.yml +++ b/.travis.yml @@ -18,7 +18,10 @@ before_script: # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide - flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics script: - - pytest + # Check unittest running + - python3 -m unittest discover tests + # Check pytest running + - python3 -m pytest tests notifications: on_success: change - on_failure: change # `always` will be the setting once code changes slow down \ No newline at end of file + on_failure: change # `always` will be the setting once code changes slow down diff --git a/README.md b/README.md index fc7f1243d..9635856b8 100644 --- a/README.md +++ b/README.md @@ -13,8 +13,20 @@ Thanks for your interest in contributing! There are many ways to contribute to t ## Tests -To run the tests, clone the repo and run : - ```pytest``` + +### Use unittest +For running all tests write down: + + $ python3 -m unittest discover tests + +For running some specific tests you can do this as following (Ex: sort): + + $ python3 -m unittest tests.test_sort + +### Use pytest +For running all tests write down: + + $ python3 -m pytest tests ## List of Implementations diff --git a/bit/__init__.py b/bit/__init__.py new file mode 100644 index 000000000..e69de29bb diff --git a/linkedlist/__init__.py b/linkedlist/__init__.py new file mode 100644 index 000000000..e69de29bb diff --git a/search/__init__.py b/search/__init__.py new file mode 100644 index 000000000..e69de29bb diff --git a/sort/__init__.py b/sort/__init__.py new file mode 100644 index 000000000..e69de29bb diff --git a/tests/__init__.py b/tests/__init__.py new file mode 100644 index 000000000..e69de29bb diff --git a/array/test_array.py b/tests/test_array.py similarity index 100% rename from array/test_array.py rename to tests/test_array.py diff --git a/bit/test_bit.py b/tests/test_bit.py similarity index 90% rename from bit/test_bit.py rename to tests/test_bit.py index 4a4c13856..fc5f2b50f 100644 --- a/bit/test_bit.py +++ b/tests/test_bit.py @@ -1,11 +1,11 @@ -from add_bitwise_operator import add_bitwise_operator -from count_ones import count_ones_iter, count_ones_recur -from find_missing_number import find_missing_number, find_missing_number2 -from power_of_two import is_power_of_two -from reverse_bits import reverse_bits -from single_number import single_number -from single_number2 import single_number2 -from subsets import subsets +from bit.add_bitwise_operator import add_bitwise_operator +from bit.count_ones import count_ones_iter, count_ones_recur +from bit.find_missing_number import find_missing_number, find_missing_number2 +from bit.power_of_two import is_power_of_two +from bit.reverse_bits import reverse_bits +from bit.single_number import single_number +from bit.single_number2 import single_number2 +from bit.subsets import subsets import unittest import random diff --git a/linkedlist/test_linkedlist.py b/tests/test_linkedlist.py similarity index 91% rename from linkedlist/test_linkedlist.py rename to tests/test_linkedlist.py index dcfad5568..89096bc9b 100644 --- a/linkedlist/test_linkedlist.py +++ b/tests/test_linkedlist.py @@ -1,11 +1,11 @@ -from reverse import reverse_list, reverse_list_recursive -from is_sorted import is_sorted -from remove_range import remove_range -from swap_in_pairs import swap_pairs -from rotate_list import rotate_right -from is_cyclic import is_cyclic -from merge_two_list import merge_two_list, merge_two_list_recur -from is_palindrome import is_palindrome, is_palindrome_stack, is_palindrome_dict +from linkedlist.reverse import reverse_list, reverse_list_recursive +from linkedlist.is_sorted import is_sorted +from linkedlist.remove_range import remove_range +from linkedlist.swap_in_pairs import swap_pairs +from linkedlist.rotate_list import rotate_right +from linkedlist.is_cyclic import is_cyclic +from linkedlist.merge_two_list import merge_two_list, merge_two_list_recur +from linkedlist.is_palindrome import is_palindrome, is_palindrome_stack, is_palindrome_dict import unittest diff --git a/search/test_search.py b/tests/test_search.py similarity index 88% rename from search/test_search.py rename to tests/test_search.py index 851f8a6c1..ca55940fd 100644 --- a/search/test_search.py +++ b/tests/test_search.py @@ -1,11 +1,11 @@ -from binary_search import binary_search, binary_search_recur -from first_occurance import first_occurance -from last_occurance import last_occurance -from search_insert import search_insert -from two_sum import two_sum, two_sum1, two_sum2 -from search_range import search_range -from find_min_rotate import find_min_rotate, find_min_rotate_recur -from search_rotate import search_rotate, search_rotate_recur +from search.binary_search import binary_search, binary_search_recur +from search.first_occurance import first_occurance +from search.last_occurance import last_occurance +from search.search_insert import search_insert +from search.two_sum import two_sum, two_sum1, two_sum2 +from search.search_range import search_range +from search.find_min_rotate import find_min_rotate, find_min_rotate_recur +from search.search_rotate import search_rotate, search_rotate_recur import unittest diff --git a/sort/test_sort.py b/tests/test_sort.py similarity index 82% rename from sort/test_sort.py rename to tests/test_sort.py index 085a12ff0..3a62d07cd 100644 --- a/sort/test_sort.py +++ b/tests/test_sort.py @@ -1,11 +1,11 @@ -from bubble_sort import bubble_sort -from comb_sort import comb_sort -from counting_sort import counting_sort -from heap_sort import max_heap_sort, min_heap_sort -from insertion_sort import insertion_sort -from merge_sort import merge_sort -from quick_sort import quick_sort -from selection_sort import selection_sort +from sort.bubble_sort import bubble_sort +from sort.comb_sort import comb_sort +from sort.counting_sort import counting_sort +from sort.heap_sort import max_heap_sort, min_heap_sort +from sort.insertion_sort import insertion_sort +from sort.merge_sort import merge_sort +from sort.quick_sort import quick_sort +from sort.selection_sort import selection_sort import unittest From 3140b770485be4ab696904f2fc1f212e09b4dcfc Mon Sep 17 00:00:00 2001 From: muneeb Date: Sat, 21 Apr 2018 21:55:10 +0400 Subject: [PATCH 246/387] Avl tree implementation --- tree/avl/__init__.py | 0 tree/avl/avl.py | 124 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 124 insertions(+) create mode 100644 tree/avl/__init__.py create mode 100644 tree/avl/avl.py diff --git a/tree/avl/__init__.py b/tree/avl/__init__.py new file mode 100644 index 000000000..e69de29bb diff --git a/tree/avl/avl.py b/tree/avl/avl.py new file mode 100644 index 000000000..102fec82d --- /dev/null +++ b/tree/avl/avl.py @@ -0,0 +1,124 @@ +from tree.tree import TreeNode + + +class AvlTree(object): + """ + An avl tree. + """ + + def __init__(self): + # Root node of the tree. + self.node = None + self.height = -1 + self.balance = 0 + + def insert(self, key): + """ + Insert new key into node + """ + # Create new node + n = TreeNode(key) + if not self.node: + self.node = n + self.node.left = AvlTree() + self.node.right = AvlTree() + elif key < self.node.val: + self.node.left.insert(key) + elif key > self.node.val: + self.node.right.insert(key) + self.re_balance() + + def re_balance(self): + """ + Re balance tree. After inserting or deleting a node, + """ + self.update_heights(recursive=False) + self.update_balances(False) + + while self.balance < -1 or self.balance > 1: + if self.balance > 1: + if self.node.left.balance < 0: + self.node.left.rotate_left() + self.update_heights() + self.update_balances() + self.rotate_right() + self.update_heights() + self.update_balances() + + if self.balance < -1: + if self.node.right.balance > 0: + self.node.right.rotate_right() + self.update_heights() + self.update_balances() + self.rotate_left() + self.update_heights() + self.update_balances() + + def update_heights(self, recursive=True): + """ + Update tree height + """ + if self.node: + if recursive: + if self.node.left: + self.node.left.update_heights() + if self.node.right: + self.node.right.update_heights() + + self.height = 1 + max(self.node.left.height, self.node.right.height) + else: + self.height = -1 + + def update_balances(self, recursive=True): + """ + Calculate tree balance factor + + """ + if self.node: + if recursive: + if self.node.left: + self.node.left.update_balances() + if self.node.right: + self.node.right.update_balances() + + self.balance = self.node.left.height - self.node.right.height + else: + self.balance = 0 + + def rotate_right(self): + """ + Right rotation + """ + new_root = self.node.left.node + new_left_sub = new_root.right.node + old_root = self.node + + self.node = new_root + old_root.left.node = new_left_sub + new_root.right.node = old_root + + def rotate_left(self): + """ + Left rotation + """ + new_root = self.node.right.node + new_left_sub = new_root.left.node + old_root = self.node + + self.node = new_root + old_root.right.node = new_left_sub + new_root.left.node = old_root + + def in_order_traverse(self): + """ + In-order traversal of the tree + """ + result = [] + + if not self.node: + return result + + result.extend(self.node.left.in_order_traverse()) + result.append(self.node.key) + result.extend(self.node.right.in_order_traverse()) + return result From df0cb82d2beaa920d54921f221ca55079abb5684 Mon Sep 17 00:00:00 2001 From: Saad Date: Sun, 22 Apr 2018 11:19:13 -0500 Subject: [PATCH 247/387] Add a function that sanitizes the string in is_palindrome.py --- strings/is_palindrome.py | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/strings/is_palindrome.py b/strings/is_palindrome.py index aa7203a01..c8b7c3380 100644 --- a/strings/is_palindrome.py +++ b/strings/is_palindrome.py @@ -48,12 +48,18 @@ def is_palindrome(s): Note: We are assuming that we are just checking a one word string. To check if a complete sentence """ +def remove_punctuation(s): + """ + Remove punctuation, case sensitivity and spaces + """ + return "".join(i.lower() for i in s if i in string.ascii_letters) # Variation 1 def string_reverse(s): return s[::-1] def is_palidrome_reverse(s): + s = remove_punctuation(s) reversed_string = string_reverse(s) # can also get rid of the string_reverse function and just do this return s == s[::-1] in one line. @@ -64,6 +70,13 @@ def is_palidrome_reverse(s): # Variation 2 def is_palidrome_two_pointer(s): + s = remove_punctuation(s) + + for i in range(0 : len(s)/2): + if (s[i] != s[len(s) - i - 1]): + return False + return True + for i in range(0, len(s)//2): if (s[i] != s[len(s) - i - 1]): return False @@ -72,6 +85,8 @@ def is_palidrome_two_pointer(s): # Variation 3 def is_palindrome_stack(s): stack = [] + s = remove_punctuation(s) + for i in range(len(s)//2, len(s)): stack.append(s[i]) for i in range(0, len(s)//2): From 99c9d219b2d9f0537cddefa703f4760da1792416 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Sun, 22 Apr 2018 23:34:20 +0530 Subject: [PATCH 248/387] fix the error in is_palindrome (#249) * fix the error in is_palindrome * Import string module * add import string --- strings/is_palindrome.py | 49 +++++++++++++++++----------------------- 1 file changed, 21 insertions(+), 28 deletions(-) diff --git a/strings/is_palindrome.py b/strings/is_palindrome.py index c8b7c3380..12746ef9b 100644 --- a/strings/is_palindrome.py +++ b/strings/is_palindrome.py @@ -1,18 +1,16 @@ """ Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. - For example, "A man, a plan, a canal: Panama" is a palindrome. "race a car" is not a palindrome. - Note: Have you consider that the string might be empty? This is a good question to ask during an interview. - For the purpose of this problem, we define empty string as valid palindrome. """ +from string import ascii_letters def is_palindrome(s): @@ -32,7 +30,6 @@ def is_palindrome(s): i, j = i+1, j-1 return True - """ Here is a bunch of other variations of is_palindrome function. @@ -45,14 +42,14 @@ def is_palindrome(s): Variation 3: Using stack idea. -Note: We are assuming that we are just checking a one word string. To check if a complete sentence -""" +Note: We are assuming that we are just checking a one word string. To check if a complete sentence +""" def remove_punctuation(s): - """ - Remove punctuation, case sensitivity and spaces - """ - return "".join(i.lower() for i in s if i in string.ascii_letters) + """ + Remove punctuation, case sensitivity and spaces + """ + return "".join(i.lower() for i in s if i in ascii_letters) # Variation 1 def string_reverse(s): @@ -70,26 +67,22 @@ def is_palidrome_reverse(s): # Variation 2 def is_palidrome_two_pointer(s): - s = remove_punctuation(s) - - for i in range(0 : len(s)/2): - if (s[i] != s[len(s) - i - 1]): - return False - return True + s = remove_punctuation(s) - for i in range(0, len(s)//2): - if (s[i] != s[len(s) - i - 1]): - return False - return True + for i in range(0, len(s)//2): + if (s[i] != s[len(s) - i - 1]): + return False + return True + # Variation 3 def is_palindrome_stack(s): - stack = [] - s = remove_punctuation(s) + stack = [] + s = remove_punctuation(s) - for i in range(len(s)//2, len(s)): - stack.append(s[i]) - for i in range(0, len(s)//2): - if s[i] != stack.pop(): - return False - return True + for i in range(len(s)//2, len(s)): + stack.append(s[i]) + for i in range(0, len(s)//2): + if s[i] != stack.pop(): + return False + return True From 83023ff608d345c00dfc39981a967ebf1efd984e Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sun, 22 Apr 2018 20:08:32 +0200 Subject: [PATCH 249/387] move tests for maths -> tests/test_maths.py (#248) --- {maths => tests}/test_maths.py | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) rename {maths => tests}/test_maths.py (89%) diff --git a/maths/test_maths.py b/tests/test_maths.py similarity index 89% rename from maths/test_maths.py rename to tests/test_maths.py index a8772dcf9..1e1ca64c7 100644 --- a/maths/test_maths.py +++ b/tests/test_maths.py @@ -1,16 +1,16 @@ import unittest -from base_conversion import int2base, base2int -from extended_gcd import extended_gcd -from gcd import gcd, lcm -from generate_strobogrammtic import gen_strobogrammatic, strobogrammaticInRange -from is_strobogrammatic import is_strobogrammatic, is_strobogrammatic2 -from next_perfect_square import find_next_square, find_next_square2 -from prime_test import prime_test -from primes_sieve_of_eratosthenes import primes -from pythagoras import pythagoras -from rabin_miller import is_prime -from rsa import encrypt, decrypt, generate_key +from maths.base_conversion import int2base, base2int +from maths.extended_gcd import extended_gcd +from maths.gcd import gcd, lcm +from maths.generate_strobogrammtic import gen_strobogrammatic, strobogrammaticInRange +from maths.is_strobogrammatic import is_strobogrammatic, is_strobogrammatic2 +from maths.next_perfect_square import find_next_square, find_next_square2 +from maths.prime_test import prime_test +from maths.primes_sieve_of_eratosthenes import primes +from maths.pythagoras import pythagoras +from maths.rabin_miller import is_prime +from maths.rsa import encrypt, decrypt, generate_key class TestBaseConversion(unittest.TestCase): From efb2c2229c6b4761a22bdc9b7b82a8ab6f6619db Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Mon, 23 Apr 2018 00:09:37 +0530 Subject: [PATCH 250/387] naming convention fixes in many files (#250) --- backtrack/array_sum_combinations.py | 4 +- calculator/math_parser.py | 8 +-- dfs/count_islands.py | 12 ++--- dfs/pacific_atlantic.py | 18 +++---- dfs/walls_and_gates.py | 12 ++--- dp/coin_change.py | 6 +-- dp/egg_drop.py | 20 +++---- dp/job_scheduling.py | 10 ++-- dp/matrix_chain_order.py | 10 ++-- dp/min_cost_path.py | 14 ++--- dp/regex_matching.py | 2 +- dp/rod_cut.py | 4 +- graph/minimum_spanning_tree.py | 8 +-- heap/binary_heap.py | 4 +- heap/merge_sorted_k_lists.py | 2 +- heap/skyline.py | 12 ++--- linkedlist/is_palindrome.py | 5 +- linkedlist/kth_to_last.py | 4 +- linkedlist/partition.py | 6 +-- linkedlist/remove_duplicates.py | 14 ++--- maths/generate_strobogrammtic.py | 2 +- matrix/sparse_mul.py | 82 ++++++++++++++--------------- sort/topsort.py | 16 +++--- strings/group_anagrams.py | 2 +- strings/int_to_roman.py | 10 ++-- strings/license_number.py | 4 +- strings/rabin_karp.py | 10 ++-- tests/test_maths.py | 11 ++-- tree/binary_tree_paths.py | 10 ++-- tree/bst/bst.py | 4 +- tree/bst/delete_node.py | 2 +- tree/bst/is_bst.py | 2 +- tree/bst/kth_smallest.py | 4 +- tree/longest_consecutive.py | 8 +-- tree/lowest_common_ancestor.py | 6 +-- tree/min_height.py | 2 +- tree/path_sum2.py | 8 +-- tree/pretty_print.py | 6 +-- tree/same_tree.py | 4 +- tree/segment_tree/segment_tree.py | 6 +-- tree/trie/add_and_search.py | 4 +- tree/trie/trie.py | 2 +- union-find/count_islands.py | 2 +- 43 files changed, 192 insertions(+), 190 deletions(-) diff --git a/backtrack/array_sum_combinations.py b/backtrack/array_sum_combinations.py index 6dbc10349..b8dbc8046 100644 --- a/backtrack/array_sum_combinations.py +++ b/backtrack/array_sum_combinations.py @@ -76,8 +76,8 @@ def backtrack(constructed_sofar): S = 7 -def check_sum(N, *nums): - if sum(x for x in nums) == N: +def check_sum(n, *nums): + if sum(x for x in nums) == n: return (True, nums) else: return (False, nums) diff --git a/calculator/math_parser.py b/calculator/math_parser.py index 0437c8c2d..830d71794 100644 --- a/calculator/math_parser.py +++ b/calculator/math_parser.py @@ -133,13 +133,13 @@ def main(): simple user-interface """ print("\t\tCalculator\n\n") - userInput = input("expression or exit: ") - while userInput != "exit": + user_input = input("expression or exit: ") + while user_input != "exit": try: - print("The result is {0}".format(evaluate(userInput))) + print("The result is {0}".format(evaluate(user_input))) except Exception: print("invalid syntax!") - userInput = input("expression or exit: ") + user_input = input("expression or exit: ") print("program end") diff --git a/dfs/count_islands.py b/dfs/count_islands.py index 5c4711526..60f6802d2 100644 --- a/dfs/count_islands.py +++ b/dfs/count_islands.py @@ -27,18 +27,18 @@ def num_islands(grid): for i, row in enumerate(grid): for j, col in enumerate(grid[i]): if col == '1': - DFS(grid, i, j) + dfs(grid, i, j) count += 1 return count -def DFS(grid, i, j): +def dfs(grid, i, j): if (i < 0 or i >= len(grid)) or (j < 0 or len(grid[0])): return if grid[i][j] != '1': return grid[i][j] = '0' - DFS(grid, i+1, j) - DFS(grid, i-1, j) - DFS(grid, i, j+1) - DFS(grid, i, j-1) + dfs(grid, i+1, j) + dfs(grid, i-1, j) + dfs(grid, i, j+1) + dfs(grid, i, j-1) diff --git a/dfs/pacific_atlantic.py b/dfs/pacific_atlantic.py index 38f2c5cbe..984aa26ba 100644 --- a/dfs/pacific_atlantic.py +++ b/dfs/pacific_atlantic.py @@ -42,24 +42,24 @@ def pacific_atlantic(matrix): atlantic = [[False for _ in range (n)] for _ in range(m)] pacific = [[False for _ in range (n)] for _ in range(m)] for i in range(n): - DFS(pacific, matrix, float("-inf"), i, 0) - DFS(atlantic, matrix, float("-inf"), i, m-1) + dfs(pacific, matrix, float("-inf"), i, 0) + dfs(atlantic, matrix, float("-inf"), i, m-1) for i in range(m): - DFS(pacific, matrix, float("-inf"), 0, i) - DFS(atlantic, matrix, float("-inf"), n-1, i) + dfs(pacific, matrix, float("-inf"), 0, i) + dfs(atlantic, matrix, float("-inf"), n-1, i) for i in range(n): for j in range(m): if pacific[i][j] and atlantic[i][j]: res.append([i, j]) return res -def DFS(grid, matrix, height, i, j): +def dfs(grid, matrix, height, i, j): if i < 0 or i >= len(matrix) or j < 0 or j >= len(matrix[0]): return if grid[i][j] or matrix[i][j] < height: return grid[i][j] = True - DFS(grid, matrix, matrix[i][j], i-1, j) - DFS(grid, matrix, matrix[i][j], i+1, j) - DFS(grid, matrix, matrix[i][j], i, j-1) - DFS(grid, matrix, matrix[i][j], i, j+1) + dfs(grid, matrix, matrix[i][j], i-1, j) + dfs(grid, matrix, matrix[i][j], i+1, j) + dfs(grid, matrix, matrix[i][j], i, j-1) + dfs(grid, matrix, matrix[i][j], i, j+1) diff --git a/dfs/walls_and_gates.py b/dfs/walls_and_gates.py index 252cb7a1e..7d10b4d6e 100644 --- a/dfs/walls_and_gates.py +++ b/dfs/walls_and_gates.py @@ -7,16 +7,16 @@ def walls_and_gates(rooms): for i in range(len(rooms)): for j in range(len(rooms[0])): if rooms[i][j] == 0: - DFS(rooms, i, j, 0) + dfs(rooms, i, j, 0) -def DFS(rooms, i, j, depth): +def dfs(rooms, i, j, depth): if (i < 0 or i >= len(rooms)) or (j < 0 or j >= len(rooms[0])): return # out of bounds if rooms[i][j] < depth: return # crossed rooms[i][j] = depth - DFS(rooms, i+1, j, depth+1) - DFS(rooms, i-1, j, depth+1) - DFS(rooms, i, j+1, depth+1) - DFS(rooms, i, j-1, depth+1) + dfs(rooms, i+1, j, depth+1) + dfs(rooms, i-1, j, depth+1) + dfs(rooms, i, j+1, depth+1) + dfs(rooms, i, j-1, depth+1) diff --git a/dp/coin_change.py b/dp/coin_change.py index 6410f5b57..dce9bb57a 100644 --- a/dp/coin_change.py +++ b/dp/coin_change.py @@ -12,10 +12,10 @@ So the output should be 5. """ -def count(S, n): +def count(s, n): # We need n+1 rows as the table is consturcted in bottom up # manner using the base case 0 value case (n = 0) - m = len(S) + m = len(s) table = [[0 for x in range(m)] for x in range(n+1)] # Fill the enteries for 0 value case (n = 0) @@ -26,7 +26,7 @@ def count(S, n): for i in range(1, n+1): for j in range(m): # Count of solutions including S[j] - x = table[i - S[j]][j] if i-S[j] >= 0 else 0 + x = table[i - s[j]][j] if i-s[j] >= 0 else 0 # Count of solutions excluding S[j] y = table[i][j-1] if j >= 1 else 0 diff --git a/dp/egg_drop.py b/dp/egg_drop.py index 3f71c3e44..c087982c5 100644 --- a/dp/egg_drop.py +++ b/dp/egg_drop.py @@ -3,29 +3,29 @@ # Function to get minimum number of trials needed in worst # case with n eggs and k floors -def eggDrop(n, k): +def egg_drop(n, k): # A 2D table where entery eggFloor[i][j] will represent minimum # number of trials needed for i eggs and j floors. - eggFloor = [[0 for x in range(k+1)] for x in range(n+1)] + egg_floor = [[0 for x in range(k+1)] for x in range(n+1)] # We need one trial for one floor and0 trials for 0 floors for i in range(1, n+1): - eggFloor[i][1] = 1 - eggFloor[i][0] = 0 + egg_floor[i][1] = 1 + egg_floor[i][0] = 0 # We always need j trials for one egg and j floors. for j in range(1, k+1): - eggFloor[1][j] = j + egg_floor[1][j] = j # Fill rest of the entries in table using optimal substructure # property for i in range(2, n+1): for j in range(2, k+1): - eggFloor[i][j] = INT_MAX + egg_floor[i][j] = INT_MAX for x in range(1, j+1): - res = 1 + max(eggFloor[i-1][x-1], eggFloor[i][j-x]) - if res < eggFloor[i][j]: - eggFloor[i][j] = res + res = 1 + max(egg_floor[i-1][x-1], egg_floor[i][j-x]) + if res < egg_floor[i][j]: + egg_floor[i][j] = res # eggFloor[n][k] holds the result - return eggFloor[n][k] + return egg_floor[n][k] diff --git a/dp/job_scheduling.py b/dp/job_scheduling.py index b644303e7..7c7236820 100644 --- a/dp/job_scheduling.py +++ b/dp/job_scheduling.py @@ -15,7 +15,7 @@ def __init__(self, start, finish, profit): # returns -1 if all jobs before index conflict with it. # The array jobs[] is sorted in increasing order of finish # time. -def binarySearch(job, start_index): +def binary_search(job, start_index): # Initialize 'lo' and 'hi' for Binary Search lo = 0 @@ -51,12 +51,12 @@ def schedule(job): for i in range(1, n): # Find profit including the current job - inclProf = job[i].profit - l = binarySearch(job, i) + incl_prof = job[i].profit + l = binary_search(job, i) if (l != -1): - inclProf += table[l]; + incl_prof += table[l]; # Store maximum of including and excluding - table[i] = max(inclProf, table[i - 1]) + table[i] = max(incl_prof, table[i - 1]) return table[n-1] diff --git a/dp/matrix_chain_order.py b/dp/matrix_chain_order.py index 651079c15..8c1ecae43 100644 --- a/dp/matrix_chain_order.py +++ b/dp/matrix_chain_order.py @@ -7,11 +7,11 @@ INF = float("inf") def matrix_chain_order(array): - N=len(array) - matrix = [[0 for x in range(N)] for x in range(N)] - sol = [[0 for x in range(N)] for x in range(N)] - for chain_length in range(2,N): - for a in range(1,N-chain_length+1): + n=len(array) + matrix = [[0 for x in range(n)] for x in range(n)] + sol = [[0 for x in range(n)] for x in range(n)] + for chain_length in range(2,n): + for a in range(1,n-chain_length+1): b = a+chain_length-1 matrix[a][b] = INF diff --git a/dp/min_cost_path.py b/dp/min_cost_path.py index e346321fe..8af947075 100644 --- a/dp/min_cost_path.py +++ b/dp/min_cost_path.py @@ -27,17 +27,17 @@ def min_cost(cost): - N = len(cost) + n = len(cost) # dist[i] stores minimum cost from 0 --> i. - dist = [INF] * N + dist = [INF] * n dist[0] = 0 # cost from 0 --> 0 is zero. - for i in range(N): - for j in range(i+1,N): + for i in range(n): + for j in range(i+1,n): dist[j] = min(dist[j], dist[i] + cost[i][j]) - return dist[N-1] + return dist[n-1] if __name__ == '__main__': @@ -45,9 +45,9 @@ def min_cost(cost): [-1, 0, 40, 50], # going from i --> j [-1, -1, 0, 70], [-1, -1, -1, 0] ] # cost[i][j] = -1 for i > j - N = len(cost) + total_len = len(cost) mcost = min_cost(cost) assert mcost == 65 - print("The Minimum cost to reach station %d is %d" % (N, mcost)) + print("The Minimum cost to reach station %d is %d" % (total_len, mcost)) diff --git a/dp/regex_matching.py b/dp/regex_matching.py index e8449d401..78b13c65c 100644 --- a/dp/regex_matching.py +++ b/dp/regex_matching.py @@ -21,7 +21,7 @@ import unittest class Solution(object): - def isMatch(self, s, p): + def is_match(self, s, p): m, n = len(s) + 1, len(p) + 1 matches = [[False] * n for _ in range(m)] diff --git a/dp/rod_cut.py b/dp/rod_cut.py index 0272eeeee..b4a82245e 100644 --- a/dp/rod_cut.py +++ b/dp/rod_cut.py @@ -3,7 +3,7 @@ # Returns the best obtainable price for a rod of length n and # price[] as prices of different pieces -def cutRod(price): +def cut_rod(price): n = len(price) val = [0]*(n+1) @@ -19,6 +19,6 @@ def cutRod(price): # Driver program to test above functions arr = [1, 5, 8, 9, 10, 17, 17, 20] -print("Maximum Obtainable Value is " + str(cutRod(arr))) +print("Maximum Obtainable Value is " + str(cut_rod(arr))) # This code is contributed by Bhavya Jain diff --git a/graph/minimum_spanning_tree.py b/graph/minimum_spanning_tree.py index 2f47e39bc..2a877f985 100644 --- a/graph/minimum_spanning_tree.py +++ b/graph/minimum_spanning_tree.py @@ -22,7 +22,7 @@ def __init__(self, n): for i in range(n): self.parent[i] = i # Make all nodes his own parent, creating n sets. - def mergeSet(self, a, b): + def merge_set(self, a, b): # Args: # a, b (int): Indexes of nodes whose sets will be merged. @@ -39,12 +39,12 @@ def mergeSet(self, a, b): self.parent[b] = a # Merge set(b) and set(a) self.size[a] += self.size[b] # Add size of old set(b) to set(a) - def findSet(self, a): + def find_set(self, a): if self.parent[a] != a: # Very important, memoize result of the # recursion in the list to optimize next # calls and make this operation practically constant, O(1) - self.parent[a] = self.findSet(self.parent[a]) + self.parent[a] = self.find_set(self.parent[a]) # node it's the set root, so we can return that index return self.parent[a] @@ -76,7 +76,7 @@ def kruskal(n, edges, ds): set_u = ds.findSet(edge.u) # Set of the node set_v = ds.findSet(edge.v) # Set of the node if set_u != set_v: - ds.mergeSet(set_u, set_v) + ds.merge_set(set_u, set_v) mst.append(edge) if len(mst) == n-1: # If we have selected n-1 edges, all the other diff --git a/heap/binary_heap.py b/heap/binary_heap.py index fc2f36a14..24e52fc67 100644 --- a/heap/binary_heap.py +++ b/heap/binary_heap.py @@ -51,7 +51,7 @@ def min_child(self,i): @abstractmethod def remove_min(self,i): pass -class Binary_Heap(AbstractHeap): +class BinaryHeap(AbstractHeap): def __init__(self): self.currentSize = 0 self.heap = [(0)] @@ -120,7 +120,7 @@ class TestSuite(unittest.TestCase): Test suite for the Binary_Heap data structures """ def setUp(self): - self.min_heap = Binary_Heap() + self.min_heap = BinaryHeap() self.min_heap.insert(4) self.min_heap.insert(50) self.min_heap.insert(7) diff --git a/heap/merge_sorted_k_lists.py b/heap/merge_sorted_k_lists.py index 740684320..2fbfe1df2 100644 --- a/heap/merge_sorted_k_lists.py +++ b/heap/merge_sorted_k_lists.py @@ -14,7 +14,7 @@ def __init__(self, x): self.next = None -def mergeKLists(lists): +def merge_k_lists(lists): dummy = node = ListNode(0) h = [(n.val, n) for n in lists if n] heapify(h) diff --git a/heap/skyline.py b/heap/skyline.py index 73fb6e899..5912addd7 100644 --- a/heap/skyline.py +++ b/heap/skyline.py @@ -37,19 +37,19 @@ import heapq -def get_skyline(LRH): +def get_skyline(lrh): """ Wortst Time Complexity: O(NlogN) :type buildings: List[List[int]] :rtype: List[List[int]] """ skyline, live = [], [] - i, n = 0, len(LRH) + i, n = 0, len(lrh) while i < n or live: - if not live or i < n and LRH[i][0] <= -live[0][1]: - x = LRH[i][0] - while i < n and LRH[i][0] == x: - heapq.heappush(live, (-LRH[i][2], -LRH[i][1])) + if not live or i < n and lrh[i][0] <= -live[0][1]: + x = lrh[i][0] + while i < n and lrh[i][0] == x: + heapq.heappush(live, (-lrh[i][2], -lrh[i][1])) i += 1 else: x = -live[0][1] diff --git a/linkedlist/is_palindrome.py b/linkedlist/is_palindrome.py index 125650712..c9f2bc18c 100644 --- a/linkedlist/is_palindrome.py +++ b/linkedlist/is_palindrome.py @@ -7,7 +7,7 @@ def is_palindrome(head): fast = fast.next.next slow = slow.next second = slow.next - slow.next = None # Don't forget here! But forget still works! + slow.next = None # Don't forget here! But forget still works! # reverse the second part node = None while second: @@ -24,6 +24,7 @@ def is_palindrome(head): head = head.next return True + def is_palindrome_stack(head): if not head or not head.next: return True @@ -80,7 +81,7 @@ def is_palindrome_dict(head): else: step = 0 for i in range(0, len(v)): - if v[i] + v[len(v)-1-step] != checksum: + if v[i] + v[len(v) - 1 - step] != checksum: return False step += 1 if middle > 1: diff --git a/linkedlist/kth_to_last.py b/linkedlist/kth_to_last.py index 48015a937..fb70a5c16 100644 --- a/linkedlist/kth_to_last.py +++ b/linkedlist/kth_to_last.py @@ -62,7 +62,7 @@ def kth_to_last(head, k): return p2 -def printLinkedList(head): +def print_linked_list(head): string = "" while head.next: string += head.val + " -> " @@ -89,7 +89,7 @@ def test(): d.next = c2 c2.next = f f.next = g - printLinkedList(a1) + print_linked_list(a1) # test kth_to_last_eval kth = kth_to_last_eval(a1, 4) diff --git a/linkedlist/partition.py b/linkedlist/partition.py index ae6a2bab4..8078f3321 100644 --- a/linkedlist/partition.py +++ b/linkedlist/partition.py @@ -18,7 +18,7 @@ def __init__(self, val=None): self.next = None -def printLinkedList(head): +def print_linked_list(head): string = "" while head.next: string += str(head.val) + " -> " @@ -67,9 +67,9 @@ def test(): e.next = f f.next = g - printLinkedList(a) + print_linked_list(a) partition(a, 5) - printLinkedList(a) + print_linked_list(a) if __name__ == '__main__': diff --git a/linkedlist/remove_duplicates.py b/linkedlist/remove_duplicates.py index a9f791cc4..ba18aecf2 100644 --- a/linkedlist/remove_duplicates.py +++ b/linkedlist/remove_duplicates.py @@ -3,7 +3,7 @@ def __init__(self, val = None): self.val = val self.next = None -def removeDups(head): +def remove_dups(head): """ Time Complexity: O(N) Space Complexity: O(N) @@ -18,7 +18,7 @@ def removeDups(head): prev = head head = head.next -def removeDupsWithoutSet(head): +def remove_dups_wothout_set(head): """ Time Complexity: O(N^2) Space Complexity: O(1) @@ -33,7 +33,7 @@ def removeDupsWithoutSet(head): runner = runner.next current = current.next -def printLinkedList(head): +def print_linked_list(head): string = "" while head.next: string += head.val + " -> " @@ -60,7 +60,7 @@ def printLinkedList(head): c2.next = f f.next = g -removeDups(a1) -printLinkedList(a1) -removeDupsWithoutSet(a1) -printLinkedList(a1) +remove_dups(a1) +print_linked_list(a1) +remove_dups_wothout_set(a1) +print_linked_list(a1) diff --git a/maths/generate_strobogrammtic.py b/maths/generate_strobogrammtic.py index 2311dcf50..dd0c400c4 100644 --- a/maths/generate_strobogrammtic.py +++ b/maths/generate_strobogrammtic.py @@ -34,7 +34,7 @@ def helper(n, length): return result -def strobogrammaticInRange(low, high): +def strobogrammatic_in_range(low, high): """ :type low: str :type high: str diff --git a/matrix/sparse_mul.py b/matrix/sparse_mul.py index f87bcd27d..c3b7b61e4 100644 --- a/matrix/sparse_mul.py +++ b/matrix/sparse_mul.py @@ -24,76 +24,76 @@ # Python solution without table (~156ms): -def multiply(self, A, B): +def multiply(self, a, b): """ :type A: List[List[int]] :type B: List[List[int]] :rtype: List[List[int]] """ - if A is None or B is None: return None - m, n, l = len(A), len(A[0]), len(B[0]) - if len(B) != n: + if a is None or b is None: return None + m, n, l = len(a), len(b[0]), len(b[0]) + if len(b) != n: raise Exception("A's column number must be equal to B's row number.") - C = [[0 for _ in range(l)] for _ in range(m)] - for i, row in enumerate(A): + c = [[0 for _ in range(l)] for _ in range(m)] + for i, row in enumerate(a): for k, eleA in enumerate(row): if eleA: - for j, eleB in enumerate(B[k]): - if eleB: C[i][j] += eleA * eleB - return C + for j, eleB in enumerate(b[k]): + if eleB: c[i][j] += eleA * eleB + return c # Python solution with only one table for B (~196ms): -def multiply(self, A, B): +def multiply(self, a, b): """ :type A: List[List[int]] :type B: List[List[int]] :rtype: List[List[int]] """ - if A is None or B is None: return None - m, n, l = len(A), len(A[0]), len(B[0]) - if len(B) != n: + if a is None or b is None: return None + m, n, l = len(a), len(a[0]), len(b[0]) + if len(b) != n: raise Exception("A's column number must be equal to B's row number.") - C = [[0 for _ in range(l)] for _ in range(m)] - tableB = {} - for k, row in enumerate(B): - tableB[k] = {} + c = [[0 for _ in range(l)] for _ in range(m)] + table_b = {} + for k, row in enumerate(b): + table_b[k] = {} for j, eleB in enumerate(row): - if eleB: tableB[k][j] = eleB - for i, row in enumerate(A): + if eleB: table_b[k][j] = eleB + for i, row in enumerate(a): for k, eleA in enumerate(row): if eleA: - for j, eleB in tableB[k].iteritems(): - C[i][j] += eleA * eleB - return C + for j, eleB in table_b[k].iteritems(): + c[i][j] += eleA * eleB + return c # Python solution with two tables (~196ms): -def multiply(self, A, B): +def multiply(self, a, b): """ :type A: List[List[int]] :type B: List[List[int]] :rtype: List[List[int]] """ - if A is None or B is None: return None - m, n = len(A), len(A[0]) - if len(B) != n: + if a is None or b is None: return None + m, n = len(a), len(b[0]) + if len(b) != n: raise Exception("A's column number must be equal to B's row number.") - l = len(B[0]) - table_A, table_B = {}, {} - for i, row in enumerate(A): + l = len(b[0]) + table_a, table_b = {}, {} + for i, row in enumerate(a): for j, ele in enumerate(row): if ele: - if i not in table_A: table_A[i] = {} - table_A[i][j] = ele - for i, row in enumerate(B): + if i not in table_a: table_a[i] = {} + table_a[i][j] = ele + for i, row in enumerate(b): for j, ele in enumerate(row): if ele: - if i not in table_B: table_B[i] = {} - table_B[i][j] = ele - C = [[0 for j in range(l)] for i in range(m)] - for i in table_A: - for k in table_A[i]: - if k not in table_B: continue - for j in table_B[k]: - C[i][j] += table_A[i][k] * table_B[k][j] - return C + if i not in table_b: table_b[i] = {} + table_b[i][j] = ele + c = [[0 for j in range(l)] for i in range(m)] + for i in table_a: + for k in table_a[i]: + if k not in table_b: continue + for j in table_b[k]: + c[i][j] += table_a[i][k] * table_b[k][j] + return c diff --git a/sort/topsort.py b/sort/topsort.py index 76cd43c11..bca556d22 100644 --- a/sort/topsort.py +++ b/sort/topsort.py @@ -23,22 +23,22 @@ given = [ "b", "c", "a", "d", "e", "f" ] -def retDeps(visited, start): +def ret_deps(visited, start): queue = [] out = [] queue.append(start) while queue: - newNode = queue.pop(0) - if newNode not in visited: - visited.add(newNode) - for child in depGraph[newNode]: + new_node = queue.pop(0) + if new_node not in visited: + visited.add(new_node) + for child in depGraph[new_node]: queue.append(child) out.append(child) out.append(start) return out -def retDepGraph(): +def ret_dep_graph(): visited = set() out = [] # visited.add(given[0]) @@ -52,7 +52,7 @@ def retDepGraph(): for child in depGraph[pac]: if child in visited: continue - out.extend(retDeps(visited, child)) + out.extend(ret_deps(visited, child)) out.append(pac) print(out) -retDepGraph() +ret_dep_graph() diff --git a/strings/group_anagrams.py b/strings/group_anagrams.py index 1bf3c0a45..47441e408 100644 --- a/strings/group_anagrams.py +++ b/strings/group_anagrams.py @@ -13,7 +13,7 @@ class Solution(object): - def groupAnagrams(self, strs): + def group_anagrams(self, strs): d = {} ans = [] k = 0 diff --git a/strings/int_to_roman.py b/strings/int_to_roman.py index dd2563783..1da20120c 100644 --- a/strings/int_to_roman.py +++ b/strings/int_to_roman.py @@ -8,10 +8,10 @@ def int_to_roman(num): :type num: int :rtype: str """ - M = ["", "M", "MM", "MMM"]; - C = ["", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM"]; - X = ["", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC"]; - I = ["", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"]; - return M[num//1000] + C[(num%1000)//100] + X[(num%100)//10] + I[num%10]; + m = ["", "M", "MM", "MMM"]; + c = ["", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM"]; + x = ["", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC"]; + i = ["", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"]; + return m[num//1000] + c[(num%1000)//100] + x[(num%100)//10] + i[num%10]; print(int_to_roman(644)) diff --git a/strings/license_number.py b/strings/license_number.py index cbcb2d966..2d3a72469 100644 --- a/strings/license_number.py +++ b/strings/license_number.py @@ -1,12 +1,12 @@ -def license_number(key, K): +def license_number(key, k): res, alnum = [], [] for char in key: if char != "-": alnum.append(char) for i, char in enumerate(reversed(alnum)): res.append(char) - if (i+1) % K == 0 and i != len(alnum)-1: + if (i+1) % k == 0 and i != len(alnum)-1: res.append("-") return "".join(res[::-1]) diff --git a/strings/rabin_karp.py b/strings/rabin_karp.py index ca6a18aad..51307db9a 100644 --- a/strings/rabin_karp.py +++ b/strings/rabin_karp.py @@ -2,20 +2,20 @@ # Rabin Karp Algorithm class RollingHash: - def __init__(self, text, sizeWord): + def __init__(self, text, size_word): self.text = text self.hash = 0 - self.sizeWord = sizeWord + self.sizeWord = size_word - for i in range(0, sizeWord): + for i in range(0, size_word): #ord maps the character to a number #subtract out the ASCII value of "a" to start the indexing at zero - self.hash += (ord(self.text[i]) - ord("a")+1)*(26**(sizeWord - i -1)) + self.hash += (ord(self.text[i]) - ord("a")+1)*(26**(size_word - i -1)) #start index of current window self.window_start = 0 #end of index window - self.window_end = sizeWord + self.window_end = size_word def move_window(self): if self.window_end <= len(self.text) - 1: diff --git a/tests/test_maths.py b/tests/test_maths.py index 1e1ca64c7..631c0e14e 100644 --- a/tests/test_maths.py +++ b/tests/test_maths.py @@ -1,9 +1,7 @@ -import unittest - from maths.base_conversion import int2base, base2int from maths.extended_gcd import extended_gcd from maths.gcd import gcd, lcm -from maths.generate_strobogrammtic import gen_strobogrammatic, strobogrammaticInRange +from maths.generate_strobogrammtic import gen_strobogrammatic, strobogrammatic_in_range from maths.is_strobogrammatic import is_strobogrammatic, is_strobogrammatic2 from maths.next_perfect_square import find_next_square, find_next_square2 from maths.prime_test import prime_test @@ -12,6 +10,8 @@ from maths.rabin_miller import is_prime from maths.rsa import encrypt, decrypt, generate_key +import unittest + class TestBaseConversion(unittest.TestCase): """ @@ -72,8 +72,8 @@ class TestGenerateStroboGrammatic(unittest.TestCase): def test_gen_strobomatic(self): self.assertEqual(['88', '11', '96', '69'], gen_strobogrammatic(2)) - def test_strobogrammaticInRange(self): - self.assertEqual(4, strobogrammaticInRange("10", "100")) + def test_strobogrammatic_in_range(self): + self.assertEqual(4, strobogrammatic_in_range("10", "100")) class TestIsStrobogrammatic(unittest.TestCase): @@ -200,5 +200,6 @@ def test_encrypt_decrypt(self): # dec = decrypt(en, d, n) # self.assertEqual(data,dec) + if __name__ == "__main__": unittest.main() diff --git a/tree/binary_tree_paths.py b/tree/binary_tree_paths.py index aad327696..3de72f710 100644 --- a/tree/binary_tree_paths.py +++ b/tree/binary_tree_paths.py @@ -1,14 +1,14 @@ -def binaryTreePaths(root): +def binary_tree_paths(root): res = [] if not root: return res - DFS(res, root, str(root.val)) + dfs(res, root, str(root.val)) return res -def DFS(res, root, cur): +def dfs(res, root, cur): if not root.left and not root.right: res.append(cur) if root.left: - DFS(res, root.left, cur+'->'+str(root.left.val)) + dfs(res, root.left, cur+'->'+str(root.left.val)) if root.right: - DFS(res, root.right, cur+'->'+str(root.right.val)) + dfs(res, root.right, cur+'->'+str(root.right.val)) diff --git a/tree/bst/bst.py b/tree/bst/bst.py index 05dc697b8..223b6b722 100644 --- a/tree/bst/bst.py +++ b/tree/bst/bst.py @@ -14,7 +14,7 @@ def __init__(self, data): self.left = None self.right = None -class bst(object): +class BST(object): def __init__(self): self.root = None @@ -115,7 +115,7 @@ def postorder(self, root): class TestSuite(unittest.TestCase): def setUp(self): - self.tree = bst() + self.tree = BST() self.tree.insert(10) self.tree.insert(15) self.tree.insert(6) diff --git a/tree/bst/delete_node.py b/tree/bst/delete_node.py index 7ee827daa..f86ecbc3d 100644 --- a/tree/bst/delete_node.py +++ b/tree/bst/delete_node.py @@ -38,7 +38,7 @@ """ class Solution(object): - def deleteNode(self, root, key): + def delete_node(self, root, key): """ :type root: TreeNode :type key: int diff --git a/tree/bst/is_bst.py b/tree/bst/is_bst.py index 74ef0a579..a132a5af3 100644 --- a/tree/bst/is_bst.py +++ b/tree/bst/is_bst.py @@ -21,7 +21,7 @@ """ -def is_BST(root): +def is_bst(root): """ :type root: TreeNode :rtype: bool diff --git a/tree/bst/kth_smallest.py b/tree/bst/kth_smallest.py index c2e511a60..4996791f2 100644 --- a/tree/bst/kth_smallest.py +++ b/tree/bst/kth_smallest.py @@ -21,7 +21,7 @@ def kth_smallest(root, k): class Solution(object): - def kthSmallest(self, root, k): + def kth_smallest(self, root, k): """ :type root: TreeNode :type k: int @@ -51,4 +51,4 @@ def helper(self, node, count): n2.left, n2.right = n4, n5 n3.left, n3.right = n6, n7 print(kth_smallest(n1, 2)) - print(Solution().kthSmallest(n1, 2)) + print(Solution().kth_smallest(n1, 2)) diff --git a/tree/longest_consecutive.py b/tree/longest_consecutive.py index 3b1947fa8..fde962c26 100644 --- a/tree/longest_consecutive.py +++ b/tree/longest_consecutive.py @@ -33,11 +33,11 @@ def longest_consecutive(root): if not root: return 0 maxlen = 0 - DFS(root, 0, root.val, maxlen) + dfs(root, 0, root.val, maxlen) return maxlen -def DFS(root, cur, target, maxlen): +def dfs(root, cur, target, maxlen): if not root: return if root.val == target: @@ -45,5 +45,5 @@ def DFS(root, cur, target, maxlen): else: cur = 1 maxlen = max(cur, maxlen) - DFS(root.left, cur, root.val+1, maxlen) - DFS(root.right, cur, root.val+1, maxlen) + dfs(root.left, cur, root.val+1, maxlen) + dfs(root.right, cur, root.val+1, maxlen) diff --git a/tree/lowest_common_ancestor.py b/tree/lowest_common_ancestor.py index 1702949f5..5c4016aed 100644 --- a/tree/lowest_common_ancestor.py +++ b/tree/lowest_common_ancestor.py @@ -21,7 +21,7 @@ """ -def LCA(root, p, q): +def lca(root, p, q): """ :type root: TreeNode :type p: TreeNode @@ -30,8 +30,8 @@ def LCA(root, p, q): """ if not root or root is p or root is q: return root - left = LCA(root.left, p, q) - right = LCA(root.right, p, q) + left = lca(root.left, p, q) + right = lca(root.right, p, q) if left and right: return root return left if left else right diff --git a/tree/min_height.py b/tree/min_height.py index ebb8f75be..a3923d43e 100644 --- a/tree/min_height.py +++ b/tree/min_height.py @@ -5,7 +5,7 @@ def __init__(self, val = 0): self.right = None -def minDepth(self, root): +def min_depth(self, root): """ :type root: TreeNode :rtype: int diff --git a/tree/path_sum2.py b/tree/path_sum2.py index 22c878038..c989f9c18 100644 --- a/tree/path_sum2.py +++ b/tree/path_sum2.py @@ -23,17 +23,17 @@ def path_sum(root, sum): if not root: return [] res = [] - DFS(root, sum, [], res) + dfs(root, sum, [], res) return res -def DFS(root, sum, ls, res): +def dfs(root, sum, ls, res): if not root.left and not root.right and root.val == sum: ls.append(root.val) res.append(ls) if root.left: - DFS(root.left, sum-root.val, ls+[root.val], res) + dfs(root.left, sum-root.val, ls+[root.val], res) if root.right: - DFS(root.right, sum-root.val, ls+[root.val], res) + dfs(root.right, sum-root.val, ls+[root.val], res) # DFS with stack diff --git a/tree/pretty_print.py b/tree/pretty_print.py index d50f26f34..1e756470a 100644 --- a/tree/pretty_print.py +++ b/tree/pretty_print.py @@ -11,11 +11,11 @@ from __future__ import print_function -def treePrint(tree): +def tree_print(tree): for key in tree: print(key, end=' ') # end=' ' prevents a newline character - treeElem = tree[key] # multiple lookups is expensive, even amortized O(1)! - for subElem in treeElem: + tree_element = tree[key] # multiple lookups is expensive, even amortized O(1)! + for subElem in tree_element: print(" -> ", subElem, end=' ') if type(subElem) != str: # OP wants indenting after digits print("\n ") # newline and a space to match indenting diff --git a/tree/same_tree.py b/tree/same_tree.py index 9100c4f2e..a407f6fd3 100644 --- a/tree/same_tree.py +++ b/tree/same_tree.py @@ -7,11 +7,11 @@ """ -def isSameTree(p, q): +def is_same_tree(p, q): if not p and not q: return True if p and q and p.val == q.val: - return isSameTree(p.left, q.left) and isSameTree(p.right, q.right) + return is_same_tree(p.left, q.left) and is_same_tree(p.right, q.right) return False # Time Complexity O(min(N,M)) diff --git a/tree/segment_tree/segment_tree.py b/tree/segment_tree/segment_tree.py index d9f0a6909..de62b6b42 100644 --- a/tree/segment_tree/segment_tree.py +++ b/tree/segment_tree/segment_tree.py @@ -3,7 +3,7 @@ allowing queries to be done later in log(N) time function takes 2 values and returns a same type value ''' -class segment_tree: +class SegmentTree: def __init__(self,arr,function): self.segment = [0 for x in range(3*len(arr)+3)] self.arr = arr @@ -38,11 +38,11 @@ def query(self,L,R): ''' Example - -mytree = segment_tree([2,4,5,3,4],max) +mytree = SegmentTree([2,4,5,3,4],max) mytree.query(2,4) mytree.query(0,3) ... -mytree = segment_tree([4,5,2,3,4,43,3],sum) +mytree = SegmentTree([4,5,2,3,4,43,3],sum) mytree.query(1,8) ... diff --git a/tree/trie/add_and_search.py b/tree/trie/add_and_search.py index 70fb1316f..70f1e9569 100644 --- a/tree/trie/add_and_search.py +++ b/tree/trie/add_and_search.py @@ -25,7 +25,7 @@ class WordDictionary(object): def __init__(self): self.root = TrieNode("") - def addWord(self, word): + def add_word(self, word): cur = self.root for letter in word: if letter not in cur.children: @@ -60,7 +60,7 @@ def __init__(self): self.word_dict = collections.defaultdict(list) - def addWord(self, word): + def add_word(self, word): if word: self.word_dict[len(word)].append(word) diff --git a/tree/trie/trie.py b/tree/trie/trie.py index 19f35f1a8..6c56209cb 100644 --- a/tree/trie/trie.py +++ b/tree/trie/trie.py @@ -31,7 +31,7 @@ def search(self, word): return False return current.is_word - def startsWith(self, prefix): + def starts_with(self, prefix): current = self.root for letter in prefix: current = current.children.get(letter) diff --git a/union-find/count_islands.py b/union-find/count_islands.py index 15cd676ee..56bed5bdd 100644 --- a/union-find/count_islands.py +++ b/union-find/count_islands.py @@ -38,7 +38,7 @@ class Solution(object): - def numIslands2(self, m, n, positions): + def num_islands2(self, m, n, positions): ans = [] islands = Union() for p in map(tuple, positions): From d0feda121f9b4140363aad94e62dc1891710058e Mon Sep 17 00:00:00 2001 From: danghai Date: Sun, 22 Apr 2018 16:15:33 -0700 Subject: [PATCH 251/387] Fix test Fixed #247 --- {array => arrays}/__init__.py | 0 {array => arrays}/delete_nth.py | 0 {array => arrays}/flatten.py | 0 {array => arrays}/garage.py | 0 {array => arrays}/josephus_problem.py | 0 {array => arrays}/longest_non_repeat.py | 0 {array => arrays}/merge_intervals.py | 0 {array => arrays}/missing_ranges.py | 0 {array => arrays}/move_zeros_to_end.py | 0 {array => arrays}/plus_one.py | 0 {array => arrays}/rotate_array.py | 0 {array => arrays}/summary_ranges.py | 0 {array => arrays}/three_sum.py | 0 {array => arrays}/two_sum.py | 0 tests/test_array.py | 26 ++++++++++++------------- 15 files changed, 13 insertions(+), 13 deletions(-) rename {array => arrays}/__init__.py (100%) rename {array => arrays}/delete_nth.py (100%) rename {array => arrays}/flatten.py (100%) rename {array => arrays}/garage.py (100%) rename {array => arrays}/josephus_problem.py (100%) rename {array => arrays}/longest_non_repeat.py (100%) rename {array => arrays}/merge_intervals.py (100%) rename {array => arrays}/missing_ranges.py (100%) rename {array => arrays}/move_zeros_to_end.py (100%) rename {array => arrays}/plus_one.py (100%) rename {array => arrays}/rotate_array.py (100%) rename {array => arrays}/summary_ranges.py (100%) rename {array => arrays}/three_sum.py (100%) rename {array => arrays}/two_sum.py (100%) diff --git a/array/__init__.py b/arrays/__init__.py similarity index 100% rename from array/__init__.py rename to arrays/__init__.py diff --git a/array/delete_nth.py b/arrays/delete_nth.py similarity index 100% rename from array/delete_nth.py rename to arrays/delete_nth.py diff --git a/array/flatten.py b/arrays/flatten.py similarity index 100% rename from array/flatten.py rename to arrays/flatten.py diff --git a/array/garage.py b/arrays/garage.py similarity index 100% rename from array/garage.py rename to arrays/garage.py diff --git a/array/josephus_problem.py b/arrays/josephus_problem.py similarity index 100% rename from array/josephus_problem.py rename to arrays/josephus_problem.py diff --git a/array/longest_non_repeat.py b/arrays/longest_non_repeat.py similarity index 100% rename from array/longest_non_repeat.py rename to arrays/longest_non_repeat.py diff --git a/array/merge_intervals.py b/arrays/merge_intervals.py similarity index 100% rename from array/merge_intervals.py rename to arrays/merge_intervals.py diff --git a/array/missing_ranges.py b/arrays/missing_ranges.py similarity index 100% rename from array/missing_ranges.py rename to arrays/missing_ranges.py diff --git a/array/move_zeros_to_end.py b/arrays/move_zeros_to_end.py similarity index 100% rename from array/move_zeros_to_end.py rename to arrays/move_zeros_to_end.py diff --git a/array/plus_one.py b/arrays/plus_one.py similarity index 100% rename from array/plus_one.py rename to arrays/plus_one.py diff --git a/array/rotate_array.py b/arrays/rotate_array.py similarity index 100% rename from array/rotate_array.py rename to arrays/rotate_array.py diff --git a/array/summary_ranges.py b/arrays/summary_ranges.py similarity index 100% rename from array/summary_ranges.py rename to arrays/summary_ranges.py diff --git a/array/three_sum.py b/arrays/three_sum.py similarity index 100% rename from array/three_sum.py rename to arrays/three_sum.py diff --git a/array/two_sum.py b/arrays/two_sum.py similarity index 100% rename from array/two_sum.py rename to arrays/two_sum.py diff --git a/tests/test_array.py b/tests/test_array.py index c02a41b0f..acae48393 100644 --- a/tests/test_array.py +++ b/tests/test_array.py @@ -1,16 +1,16 @@ -from array.delete_nth import delete_nth, delete_nth_naive -from array.flatten import flatten, flatten_iter -from array.garage import garage -from array.josephus_problem import josephus -from array.longest_non_repeat import longest_non_repeat, longest_non_repeat_two -from array.merge_intervals import Interval, merge_v2 -from array.missing_ranges import missing_ranges -from array.move_zeros_to_end import move_zeros -from array.plus_one import plus_one, plus_one_v2, plus_one_v3 -from array.rotate_array import rotate_v1, rotate_v2, rotate_v3 -from array.summary_ranges import summary_ranges -from array.three_sum import three_sum -from array.two_sum import two_sum +from arrays.delete_nth import delete_nth, delete_nth_naive +from arrays.flatten import flatten, flatten_iter +from arrays.garage import garage +from arrays.josephus_problem import josephus +from arrays.longest_non_repeat import longest_non_repeat, longest_non_repeat_two +from arrays.merge_intervals import Interval, merge_v2 +from arrays.missing_ranges import missing_ranges +from arrays.move_zeros_to_end import move_zeros +from arrays.plus_one import plus_one, plus_one_v2, plus_one_v3 +from arrays.rotate_array import rotate_v1, rotate_v2, rotate_v3 +from arrays.summary_ranges import summary_ranges +from arrays.three_sum import three_sum +from arrays.two_sum import two_sum import unittest From 69887e45db5dac7010a46e926f33ad613b67c02b Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Mon, 23 Apr 2018 00:31:54 -0700 Subject: [PATCH 252/387] Add heap and stack to test (#245) * Add test_stack io tests * Add test_heap to test --- heap/__init__.py | 0 heap/binary_heap.py | 35 ---------- heap/skyline.py | 5 -- stack/is_consecutive.py | 17 ----- stack/is_sorted.py | 14 ---- stack/remove_min.py | 15 ----- stack/simplify_path.py | 9 --- stack/stack.py | 84 ----------------------- stack/stutter.py | 14 ---- stack/switch_pairs.py | 22 ------ stack/valid_parenthesis.py | 21 ------ tests/test_heap.py | 52 +++++++++++++++ tests/test_stack.py | 133 +++++++++++++++++++++++++++++++++++++ 13 files changed, 185 insertions(+), 236 deletions(-) create mode 100644 heap/__init__.py create mode 100644 tests/test_heap.py create mode 100644 tests/test_stack.py diff --git a/heap/__init__.py b/heap/__init__.py new file mode 100644 index 000000000..e69de29bb diff --git a/heap/binary_heap.py b/heap/binary_heap.py index 24e52fc67..5119a0309 100644 --- a/heap/binary_heap.py +++ b/heap/binary_heap.py @@ -29,7 +29,6 @@ 55 90 87 55 90 55 90 """ -import unittest from abc import ABCMeta, abstractmethod class AbstractHeap(metaclass=ABCMeta): @@ -114,37 +113,3 @@ def remove_min(self): self.heap.pop() self.perc_down(1) return ret - -class TestSuite(unittest.TestCase): - """ - Test suite for the Binary_Heap data structures - """ - def setUp(self): - self.min_heap = BinaryHeap() - self.min_heap.insert(4) - self.min_heap.insert(50) - self.min_heap.insert(7) - self.min_heap.insert(55) - self.min_heap.insert(90) - self.min_heap.insert(87) - - def test_insert(self): - # Before insert 2: [0, 4, 50, 7, 55, 90, 87] - # After insert: [0, 2, 50, 4, 55, 90, 87, 7] - self.min_heap.insert(2) - self.assertEqual([0, 2, 50, 4, 55, 90, 87, 7], - self.min_heap.heap) - self.assertEqual(7, self.min_heap.currentSize) - - def test_remove_min(self): - ret = self.min_heap.remove_min() - # Before remove_min : [0, 4, 50, 7, 55, 90, 87] - # After remove_min: [7, 50, 87, 55, 90] - # Test return value - self.assertEqual(4,ret) - self.assertEqual([0, 7, 50, 87, 55, 90], - self.min_heap.heap) - self.assertEqual(5, self.min_heap.currentSize) - -if __name__ == "__main__": - unittest.main() diff --git a/heap/skyline.py b/heap/skyline.py index 5912addd7..c666703f3 100644 --- a/heap/skyline.py +++ b/heap/skyline.py @@ -34,7 +34,6 @@ into one in the final output as such: [...[2 3], [4 5], [12 7], ...] """ - import heapq def get_skyline(lrh): @@ -59,7 +58,3 @@ def get_skyline(lrh): if not skyline or height != skyline[-1][1]: skyline += [x, height], return skyline - -buildings = [ [2, 9, 10], [3, 7, 15], [5, 12, 12], [15, 20, 10], [19, 24, 8] ] -# [ [2 10], [3 15], [7 12], [12 0], [15 10], [20 8], [24, 0] ] -print(get_skyline(buildings)) diff --git a/stack/is_consecutive.py b/stack/is_consecutive.py index 6964d4fc9..f73ddffc7 100644 --- a/stack/is_consecutive.py +++ b/stack/is_consecutive.py @@ -16,7 +16,6 @@ first_is_consecutive: it uses a single stack as auxiliary storage second_is_consecutive: it uses a single queue as auxiliary storage """ -import unittest import collections def first_is_consecutive(stack): @@ -57,19 +56,3 @@ def second_is_consecutive(stack): stack.append(q.pop()) return True - -class TestSuite(unittest.TestCase): - """ - test suite for the function (above) - """ - def test_is_consecutive(self): - self.assertTrue(first_is_consecutive([3, 4, 5, 6, 7])) - self.assertFalse(first_is_consecutive([3, 4, 6, 7])) - self.assertFalse(first_is_consecutive([3, 2, 1])) - - self.assertTrue(second_is_consecutive([3, 4, 5, 6, 7])) - self.assertFalse(second_is_consecutive([3, 4, 6, 7])) - self.assertFalse(second_is_consecutive([3, 2, 1])) - -if __name__ == "__main__": - unittest.main() diff --git a/stack/is_sorted.py b/stack/is_sorted.py index 9ff30f1ff..8824dfa95 100644 --- a/stack/is_sorted.py +++ b/stack/is_sorted.py @@ -9,8 +9,6 @@ bottom [1, 2, 3, 4, 5, 6] top The function should return true """ -import unittest - def is_sorted(stack): storage_stack = [] for i in range(len(stack)): @@ -30,15 +28,3 @@ def is_sorted(stack): stack.append(storage_stack.pop()) return True - -class TestSuite(unittest.TestCase): - """ - test suite for the function (above) - """ - def test_stutter(self): - # Test case: bottom [6, 3, 5, 1, 2, 4] top - self.assertFalse(is_sorted([6, 3, 5, 1, 2, 4])) - self.assertTrue(is_sorted([1, 2, 3, 4, 5, 6])) - -if __name__ == "__main__": - unittest.main() diff --git a/stack/remove_min.py b/stack/remove_min.py index 04260203c..1cd8fc6ae 100644 --- a/stack/remove_min.py +++ b/stack/remove_min.py @@ -8,8 +8,6 @@ bottom [2, 8, 3, 7, 3] top """ -import unittest - def remove_min(stack): storage_stack = [] if len(stack) == 0: # Stack is empty @@ -28,16 +26,3 @@ def remove_min(stack): if val != min: stack.append(val) return stack - -class TestSuite(unittest.TestCase): - """ - test suite for the function (above) - """ - def test_stutter(self): - # Test case: bottom [2, 8, 3, -6, 7, 3] top - self.assertEqual([2, 8, 3, 7, 3], remove_min([2, 8, 3, -6, 7, 3])) - # Test case: 2 smallest value [2, 8, 3, 7, 3] - self.assertEqual([4, 8, 7], remove_min([4, 8, 3, 7, 3])) - -if __name__ == "__main__": - unittest.main() diff --git a/stack/simplify_path.py b/stack/simplify_path.py index fba0adefb..fed4385a6 100644 --- a/stack/simplify_path.py +++ b/stack/simplify_path.py @@ -10,8 +10,6 @@ * Another corner case is the path might contain multiple slashes '/' together, such as "/home//foo/". In this case, you should ignore redundant slashes and return "/home/foo". """ - - def simplify_path(path): """ :type path: str @@ -27,10 +25,3 @@ def simplify_path(path): elif tok not in skip: stack.append(tok) return '/' + '/'.join(stack) - - -if __name__ == '__main__': - - p = '/my/name/is/..//keon' - print(p) - print(simplify_path(p)) diff --git a/stack/stack.py b/stack/stack.py index ce7213949..216c26492 100644 --- a/stack/stack.py +++ b/stack/stack.py @@ -13,10 +13,7 @@ size() returns the number of items on the stack. It needs no parameters and returns an integer. """ -import unittest from abc import ABCMeta, abstractmethod - - class AbstractStack(metaclass=ABCMeta): """Abstract Class for Stacks.""" def __init__(self): @@ -133,84 +130,3 @@ def peek(self): if self.is_empty(): raise IndexError("Stack is empty") return self.head.value - - # optional - """ - def is_empty(self): - return self.head is None - """ - - -class TestSuite(unittest.TestCase): - """ - Test suite for the stack data structures (above) - """ - - def test_ArrayStack(self): - stack = ArrayStack() - stack.push(1) - stack.push(2) - stack.push(3) - - # test __iter__() - it = iter(stack) - self.assertEqual(3, next(it)) - self.assertEqual(2, next(it)) - self.assertEqual(1, next(it)) - self.assertRaises(StopIteration, next, it) - - # test __len__() - self.assertEqual(3, len(stack)) - - # test __str__() - self.assertEqual(str(stack), "Top-> 3 2 1") - - # test is_empty() - self.assertFalse(stack.is_empty()) - - # test peek() - self.assertEqual(3, stack.peek()) - - # test pop() - self.assertEqual(3, stack.pop()) - self.assertEqual(2, stack.pop()) - self.assertEqual(1, stack.pop()) - - self.assertTrue(stack.is_empty()) - - def test_LinkedListStack(self): - stack = LinkedListStack() - - stack.push(1) - stack.push(2) - stack.push(3) - - # test __iter__() - it = iter(stack) - self.assertEqual(3, next(it)) - self.assertEqual(2, next(it)) - self.assertEqual(1, next(it)) - self.assertRaises(StopIteration, next, it) - - # test __len__() - self.assertEqual(3, len(stack)) - - # test __str__() - self.assertEqual(str(stack), "Top-> 3 2 1") - - # test is_empty() - self.assertFalse(stack.is_empty()) - - # test peek() - self.assertEqual(3, stack.peek()) - - # test pop() - self.assertEqual(3, stack.pop()) - self.assertEqual(2, stack.pop()) - self.assertEqual(1, stack.pop()) - - self.assertTrue(stack.is_empty()) - - -if __name__ == "__main__": - unittest.main() diff --git a/stack/stutter.py b/stack/stutter.py index 3956d33a7..30314992c 100644 --- a/stack/stutter.py +++ b/stack/stutter.py @@ -11,7 +11,6 @@ first_stutter: it uses a single stack as auxiliary storage second_stutter: it uses a single queue as auxiliary storage """ -import unittest import collections def first_stutter(stack): @@ -43,16 +42,3 @@ def second_stutter(stack): stack.append(val) return stack -class TestSuite(unittest.TestCase): - """ - test suite for the function (above) - """ - def test_stutter(self): - # Test case: bottom [3, 7, 1, 14, 9] top - self.assertEqual([3, 3, 7, 7, 1, 1, 14, 14, 9, 9], - first_stutter([3, 7, 1, 14, 9])) - self.assertEqual([3, 3, 7, 7, 1, 1, 14, 14, 9, 9], - second_stutter([3, 7, 1, 14, 9])) - -if __name__ == "__main__": - unittest.main() diff --git a/stack/switch_pairs.py b/stack/switch_pairs.py index 97a9a51f1..f5db2280d 100644 --- a/stack/switch_pairs.py +++ b/stack/switch_pairs.py @@ -18,7 +18,6 @@ first_switch_pairs: it uses a single stack as auxiliary storage second_switch_pairs: it uses a single queue as auxiliary storage """ -import unittest import collections def first_switch_pairs(stack): @@ -61,24 +60,3 @@ def second_switch_pairs(stack): stack.append(first) return stack - -class TestSuite(unittest.TestCase): - """ - test suite for the function (above) - """ - def test_switch_pairs(self): - # Test case: even number of values in stack - # bottom [3, 8, 17, 9, 1, 10] top - self.assertEqual([8, 3, 9, 17, 10, 1], - first_switch_pairs([3, 8, 17, 9, 1, 10])) - self.assertEqual([8, 3, 9, 17, 10, 1], - second_switch_pairs([3, 8, 17, 9, 1, 10])) - # Test case: odd number of values in stack - # bottom [3, 8, 17, 9, 1] top - self.assertEqual([8, 3, 9, 17, 1], - first_switch_pairs([3, 8, 17, 9, 1])) - self.assertEqual([8, 3, 9, 17, 1], - second_switch_pairs([3, 8, 17, 9, 1])) - -if __name__ == "__main__": - unittest.main() diff --git a/stack/valid_parenthesis.py b/stack/valid_parenthesis.py index 179c940a4..b62ac02c4 100644 --- a/stack/valid_parenthesis.py +++ b/stack/valid_parenthesis.py @@ -6,10 +6,6 @@ The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]" and "([)]" are not. """ - -import unittest - - def is_valid(s: str) -> bool: stack = [] dic = {")": "(", @@ -22,20 +18,3 @@ def is_valid(s: str) -> bool: if not stack or dic[char] != stack.pop(): return False return not stack - - -class TestSuite(unittest.TestCase): - """ - test suite for the function (above) - """ - def test_is_valid(self): - - self.assertTrue(is_valid("[]")) - self.assertTrue(is_valid("[]()[]")) - self.assertFalse(is_valid("[[[]]")) - self.assertTrue(is_valid("{([])}")) - self.assertFalse(is_valid("(}")) - - -if __name__ == "__main__": - unittest.main() diff --git a/tests/test_heap.py b/tests/test_heap.py new file mode 100644 index 000000000..c6f2c7e60 --- /dev/null +++ b/tests/test_heap.py @@ -0,0 +1,52 @@ +from heap.binary_heap import BinaryHeap +from heap.skyline import get_skyline +from heap.sliding_window_max import max_sliding_window + +import unittest + +class TestBinaryHeap(unittest.TestCase): + """ + Test suite for the binary_heap data structures + """ + def setUp(self): + self.min_heap = BinaryHeap() + self.min_heap.insert(4) + self.min_heap.insert(50) + self.min_heap.insert(7) + self.min_heap.insert(55) + self.min_heap.insert(90) + self.min_heap.insert(87) + + def test_insert(self): + # Before insert 2: [0, 4, 50, 7, 55, 90, 87] + # After insert: [0, 2, 50, 4, 55, 90, 87, 7] + self.min_heap.insert(2) + self.assertEqual([0, 2, 50, 4, 55, 90, 87, 7], + self.min_heap.heap) + self.assertEqual(7, self.min_heap.currentSize) + + def test_remove_min(self): + ret = self.min_heap.remove_min() + # Before remove_min : [0, 4, 50, 7, 55, 90, 87] + # After remove_min: [7, 50, 87, 55, 90] + # Test return value + self.assertEqual(4,ret) + self.assertEqual([0, 7, 50, 87, 55, 90], + self.min_heap.heap) + self.assertEqual(5, self.min_heap.currentSize) + +class TestSuite(unittest.TestCase): + def test_get_skyline(self): + buildings = [ [2, 9, 10], [3, 7, 15], [5, 12, 12], \ + [15, 20, 10], [19, 24, 8] ] + # Expect output + output = [ [2, 10], [3, 15], [7, 12], [12, 0], [15, 10], \ + [20, 8], [24, 0] ] + self.assertEqual(output, get_skyline(buildings)) + + def test_max_sliding_window(self): + nums = [1, 3, -1, -3, 5, 3, 6, 7] + self.assertEqual([3, 3, 5, 5, 6, 7], max_sliding_window(nums, 3)) + +if __name__ == "__main__": + unittest.main() diff --git a/tests/test_stack.py b/tests/test_stack.py new file mode 100644 index 000000000..3b55ac90f --- /dev/null +++ b/tests/test_stack.py @@ -0,0 +1,133 @@ +from stack.is_consecutive import first_is_consecutive, second_is_consecutive +from stack.is_sorted import is_sorted +from stack.remove_min import remove_min +from stack.stutter import first_stutter, second_stutter +from stack.switch_pairs import first_switch_pairs, second_switch_pairs +from stack.valid_parenthesis import is_valid +from stack.simplify_path import simplify_path +from stack.stack import ArrayStack, LinkedListStack + +import unittest +class TestSuite(unittest.TestCase): + def test_is_consecutive(self): + self.assertTrue(first_is_consecutive([3, 4, 5, 6, 7])) + self.assertFalse(first_is_consecutive([3, 4, 6, 7])) + self.assertFalse(first_is_consecutive([3, 2, 1])) + + self.assertTrue(second_is_consecutive([3, 4, 5, 6, 7])) + self.assertFalse(second_is_consecutive([3, 4, 6, 7])) + self.assertFalse(second_is_consecutive([3, 2, 1])) + + def test_is_sorted(self): + # Test case: bottom [6, 3, 5, 1, 2, 4] top + self.assertFalse(is_sorted([6, 3, 5, 1, 2, 4])) + self.assertTrue(is_sorted([1, 2, 3, 4, 5, 6])) + + def test_remove_min(self): + # Test case: bottom [2, 8, 3, -6, 7, 3] top + self.assertEqual([2, 8, 3, 7, 3], remove_min([2, 8, 3, -6, 7, 3])) + # Test case: 2 smallest value [2, 8, 3, 7, 3] + self.assertEqual([4, 8, 7], remove_min([4, 8, 3, 7, 3])) + + def test_stutter(self): + # Test case: bottom [3, 7, 1, 14, 9] top + self.assertEqual([3, 3, 7, 7, 1, 1, 14, 14, 9, 9], + first_stutter([3, 7, 1, 14, 9])) + self.assertEqual([3, 3, 7, 7, 1, 1, 14, 14, 9, 9], + second_stutter([3, 7, 1, 14, 9])) + + def test_switch_pairs(self): + # Test case: even number of values in stack + # bottom [3, 8, 17, 9, 1, 10] top + self.assertEqual([8, 3, 9, 17, 10, 1], + first_switch_pairs([3, 8, 17, 9, 1, 10])) + self.assertEqual([8, 3, 9, 17, 10, 1], + second_switch_pairs([3, 8, 17, 9, 1, 10])) + # Test case: odd number of values in stack + # bottom [3, 8, 17, 9, 1] top + self.assertEqual([8, 3, 9, 17, 1], + first_switch_pairs([3, 8, 17, 9, 1])) + self.assertEqual([8, 3, 9, 17, 1], + second_switch_pairs([3, 8, 17, 9, 1])) + + def test_is_valid_parenthesis(self): + + self.assertTrue(is_valid("[]")) + self.assertTrue(is_valid("[]()[]")) + self.assertFalse(is_valid("[[[]]")) + self.assertTrue(is_valid("{([])}")) + self.assertFalse(is_valid("(}")) + + def test_simplify_path(self): + p = '/my/name/is/..//keon' + self.assertEqual('/my/name/keon', simplify_path(p)) + + +class TestStack(unittest.TestCase): + def test_ArrayStack(self): + stack = ArrayStack() + stack.push(1) + stack.push(2) + stack.push(3) + + # test __iter__() + it = iter(stack) + self.assertEqual(3, next(it)) + self.assertEqual(2, next(it)) + self.assertEqual(1, next(it)) + self.assertRaises(StopIteration, next, it) + + # test __len__() + self.assertEqual(3, len(stack)) + + # test __str__() + self.assertEqual(str(stack), "Top-> 3 2 1") + + # test is_empty() + self.assertFalse(stack.is_empty()) + + # test peek() + self.assertEqual(3, stack.peek()) + + # test pop() + self.assertEqual(3, stack.pop()) + self.assertEqual(2, stack.pop()) + self.assertEqual(1, stack.pop()) + + self.assertTrue(stack.is_empty()) + + def test_LinkedListStack(self): + stack = LinkedListStack() + + stack.push(1) + stack.push(2) + stack.push(3) + + # test __iter__() + it = iter(stack) + self.assertEqual(3, next(it)) + self.assertEqual(2, next(it)) + self.assertEqual(1, next(it)) + self.assertRaises(StopIteration, next, it) + + # test __len__() + self.assertEqual(3, len(stack)) + + # test __str__() + self.assertEqual(str(stack), "Top-> 3 2 1") + + # test is_empty() + self.assertFalse(stack.is_empty()) + + # test peek() + self.assertEqual(3, stack.peek()) + + # test pop() + self.assertEqual(3, stack.pop()) + self.assertEqual(2, stack.pop()) + self.assertEqual(1, stack.pop()) + + self.assertTrue(stack.is_empty()) + +if __name__ == "__main__": + unittest.main() From 91b0e29a602a8a186423bf7528a1c13050994883 Mon Sep 17 00:00:00 2001 From: Murilo Camargos Date: Mon, 23 Apr 2018 08:56:21 -0300 Subject: [PATCH 253/387] Add init file to graph module --- graph/__init__.py | 0 1 file changed, 0 insertions(+), 0 deletions(-) create mode 100644 graph/__init__.py diff --git a/graph/__init__.py b/graph/__init__.py new file mode 100644 index 000000000..e69de29bb From 9d785db307be8a329f500538606ffc67ca27552b Mon Sep 17 00:00:00 2001 From: Murilo Camargos Date: Mon, 23 Apr 2018 08:56:55 -0300 Subject: [PATCH 254/387] Move graph tests to correct folder --- {graph => tests}/test_graph.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) rename {graph => tests}/test_graph.py (83%) diff --git a/graph/test_graph.py b/tests/test_graph.py similarity index 83% rename from graph/test_graph.py rename to tests/test_graph.py index 08402d25d..e62a10226 100644 --- a/graph/test_graph.py +++ b/tests/test_graph.py @@ -1,4 +1,4 @@ -from tarjan import Tarjan +from graph.tarjan import Tarjan import unittest @@ -25,7 +25,7 @@ def test_tarjan_example_1(self): } g = Tarjan(example) - self.assertEqual(g.sccs, [['F', 'G'], ['H', 'D', 'C'], ['E', 'B', 'A']]) + self.assertEqual(g.sccs, [['F', 'G'], ['C', 'D', 'H'], ['A', 'B', 'E']]) def test_tarjan_example_2(self): # Graph from https://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm#/media/File:Tarjan%27s_Algorithm_Animation.gif @@ -41,4 +41,4 @@ def test_tarjan_example_2(self): } g = Tarjan(example) - self.assertEqual(g.sccs, [['B', 'E', 'A'], ['D', 'C'], ['G', 'F'], ['H']]) \ No newline at end of file + self.assertEqual(g.sccs, [['A', 'B', 'E'], ['C', 'D'], ['F', 'G'], ['H']]) \ No newline at end of file From 91ff5306ae49fdb233d8d4909adf6da2ce0ea9bb Mon Sep 17 00:00:00 2001 From: Murilo Camargos Date: Mon, 23 Apr 2018 08:57:19 -0300 Subject: [PATCH 255/387] Add comparison magic methods for Node objects --- graph/graph.py | 32 +++++++++++++++++++++++++++----- 1 file changed, 27 insertions(+), 5 deletions(-) diff --git a/graph/graph.py b/graph/graph.py index 3cc41793d..31e564599 100644 --- a/graph/graph.py +++ b/graph/graph.py @@ -6,13 +6,17 @@ class Node(object): def __init__(self, name): self.name = name - - def __eq__(self, obj): + + @staticmethod + def get_name(obj): if isinstance(obj, Node): - return obj.name == self.name + return obj.name elif isinstance(obj, str): - return obj == self.name - return False + return obj + return'' + + def __eq__(self, obj): + return self.name == self.get_name(obj) def __repr__(self): return self.name @@ -20,6 +24,24 @@ def __repr__(self): def __hash__(self): return hash(self.name) + def __ne__(self, obj): + return self.name != self.get_name(obj) + + def __lt__(self, obj): + return self.name < self.get_name(obj) + + def __le__(self, obj): + return self.name <= self.get_name(obj) + + def __gt__(self, obj): + return self.name > self.get_name(obj) + + def __ge__(self, obj): + return self.name >= self.get_name(obj) + + def __bool__(self): + return self.name + class DirectedEdge(object): def __init__(self, node_from, node_to): self.nf = node_from From 0fb34b7b0f8466e5129e776b68b0579503aa8e81 Mon Sep 17 00:00:00 2001 From: Murilo Camargos Date: Mon, 23 Apr 2018 08:58:07 -0300 Subject: [PATCH 256/387] Sort each SCC for standardization --- graph/tarjan.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/graph/tarjan.py b/graph/tarjan.py index f998bd78b..584999b49 100644 --- a/graph/tarjan.py +++ b/graph/tarjan.py @@ -3,7 +3,7 @@ in a graph. https://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm """ -from graph import DirectedGraph +from graph.graph import DirectedGraph class Tarjan(object): def __init__(self, dict_graph): @@ -52,5 +52,6 @@ def strongconnect(self, v, sccs): scc.append(w) if w == v: break + scc.sort() sccs.append(scc) \ No newline at end of file From dc967b5d11de5d6b708bf7bd82a491f13b02c0a2 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Wed, 25 Apr 2018 01:38:24 +0200 Subject: [PATCH 257/387] Tests for the module strings (#255) * changed line with // operator * added test for add_binary.py * changed formatting * added test for file breaking_bad.py * added test for the file decode_string.py * added test suite for the file delete_reoccurring.py * changed formatting * added test suite for the file domain_extractor.py * renamed the functions of the file domain_extractor.py * added test suite for encode_decode.py * removed the surrounding class. * added test suite for the file group_anagrams.py * added a new line * added test suite for the file int_to_roman.py * added test suite for the file is_palindrome.py * added a test suite for the file license_number.py * added a test suite for the file make_sentence.py * changed the description * added test suite for the file merge_string_checker.py * added test suite for the file multiply_strings.py * added test for one_edit_distance.py * added test for the file rabin_karp.py * added test suite for the file reverse_string.py * added test for the file reverse_vowel.py * added test for reverse_words * added test for roman_to_int.py * added a test for the file strip_urls_params.py * remove inline test * added test for validate_coordinates.py * added test for the file word_squares.py --- strings/add_binary.py | 4 +- strings/breaking_bad.py | 32 +-- strings/decode_string.py | 6 - strings/domain_extractor.py | 17 +- strings/encode_decode.py | 9 +- strings/group_anagrams.py | 29 ++- strings/int_to_roman.py | 2 - strings/is_palindrome.py | 7 +- strings/license_number.py | 8 - strings/make_sentence.py | 7 - strings/merge_string_checker.py | 8 +- strings/rabin_karp.py | 4 +- strings/reverse_string.py | 7 - strings/reverse_vowel.py | 4 - strings/strip_url_params.py | 25 +-- strings/validate_coordinates.py | 18 -- strings/word_squares.py | 3 - tests/test_strings.py | 366 ++++++++++++++++++++++++++++++++ 18 files changed, 400 insertions(+), 156 deletions(-) create mode 100644 tests/test_strings.py diff --git a/strings/add_binary.py b/strings/add_binary.py index 74e94794c..0158a80c8 100644 --- a/strings/add_binary.py +++ b/strings/add_binary.py @@ -21,6 +21,6 @@ def add_binary(a, b): c += ord(b[j]) - zero j -= 1 s = chr(c % 2 + zero) + s - # c //= 2 for python3 - c /= 2 + c //= 2 + return s diff --git a/strings/breaking_bad.py b/strings/breaking_bad.py index c2b20fc97..98baf7cdb 100644 --- a/strings/breaking_bad.py +++ b/strings/breaking_bad.py @@ -24,9 +24,6 @@ from functools import reduce -words = ['Amazon', 'Microsoft', 'Google'] -symbols = ['i', 'Am', 'cro', 'le', 'abc'] - def match_symbol(words, symbols): import re @@ -38,15 +35,6 @@ def match_symbol(words, symbols): combined.append(re.sub(s, "[{}]".format(s), c)) return combined - -print(match_symbol(words, symbols)) - -""" -O(n * max(log(n), l)) time complexity -n = len(words), l = len of a word -""" - - def match_symbol_1(words, symbols): res = [] # reversely sort the symbols according to their lengths. @@ -64,34 +52,27 @@ def match_symbol_1(words, symbols): res.append(word) return res - -words = ['Amazon', 'Microsoft', 'Google', 'Facebook'] -symbols = ['i', 'Am', 'cro', 'Na', 'le', 'abc'] -print(match_symbol_1(words, symbols)) -# ['[Am]azon', 'Mi[cro]soft', 'Goog[le]', 'Facebook'] - - """ -Another approach is to use a Trie for the dictionary (the symbols), and then +Another approach is to use a Tree for the dictionary (the symbols), and then match brute force. The complexity will depend on the dictionary; if all are suffixes of the other, it will be n*m (where m is the size of the dictionary). For example, in Python: """ -class TrieNode: +class TreeNode: def __init__(self): self.c = dict() self.sym = None def bracket(words, symbols): - root = TrieNode() + root = TreeNode() for s in symbols: t = root for char in s: if char not in t.c: - t.c[char] = TrieNode() + t.c[char] = TreeNode() t = t.c[char] t.sym = s result = dict() @@ -112,8 +93,3 @@ def bracket(words, symbols): result[word] = "{}[{}]{}".format(word[:sym[0]], sym[2], word[sym[1]:]) return tuple(word if word not in result else result[word] for word in words) - - -bracket(['amazon', 'microsoft', 'google'], - ['i', 'am', 'cro', 'na', 'le', 'abc']) -# >>> ('[am]azon', 'mi[cro]soft', 'goog[le]') diff --git a/strings/decode_string.py b/strings/decode_string.py index d6a0a7aac..6a2350f6f 100644 --- a/strings/decode_string.py +++ b/strings/decode_string.py @@ -36,9 +36,3 @@ def decode_string(s): else: cur_string += c return cur_string - -a = "3[a]2[bc]" #"aaabcbc". -b = "3[a2[c]]" #"accaccacc". - -print(decode_string(a)) -print(decode_string(b)) diff --git a/strings/domain_extractor.py b/strings/domain_extractor.py index dcfba0f8c..1b9ff2b78 100644 --- a/strings/domain_extractor.py +++ b/strings/domain_extractor.py @@ -10,7 +10,7 @@ """ # Non pythonic way -def domain_name(url): +def domain_name_1(url): #grab only the non http(s) part full_domain_name = url.split('//')[-1] #grab the actual one depending on the len of the list @@ -24,19 +24,6 @@ def domain_name(url): # pythonic one liner -def domain_name(url): +def domain_name_2(url): return url.split("//")[-1].split("www.")[-1].split(".")[0] - -import unittest -class TestSuite(unittest.TestCase): - - def test_valid(self): - self.assertEqual(domain_name("https://github.com/SaadBenn"), "github") - - def test_invalid(self): - self.assertEqual(domain_name("http://google.com"), "http") - - -if __name__ == "__main__": - unittest.main() diff --git a/strings/encode_decode.py b/strings/encode_decode.py index abc61ab53..4fbdf8943 100644 --- a/strings/encode_decode.py +++ b/strings/encode_decode.py @@ -27,11 +27,4 @@ def decode(s): size = int(s[i:index]) strs.append(s[index+1: index+1+size]) i = index+1+size - return strs - -strs = "keon is awesome" -print(strs) -enc = encode(strs) -print(enc) -dec = decode(enc) -print(dec) + return strs \ No newline at end of file diff --git a/strings/group_anagrams.py b/strings/group_anagrams.py index 47441e408..d3b9047c2 100644 --- a/strings/group_anagrams.py +++ b/strings/group_anagrams.py @@ -12,18 +12,17 @@ """ -class Solution(object): - def group_anagrams(self, strs): - d = {} - ans = [] - k = 0 - for str in strs: - sstr = ''.join(sorted(str)) - if sstr not in d: - d[sstr] = k - k = k+1 - ans.append([]) - ans[-1].append(str) - else: - ans[d[sstr]].append(str) - return ans +def group_anagrams(strs): + d = {} + ans = [] + k = 0 + for str in strs: + sstr = ''.join(sorted(str)) + if sstr not in d: + d[sstr] = k + k += 1 + ans.append([]) + ans[-1].append(str) + else: + ans[d[sstr]].append(str) + return ans diff --git a/strings/int_to_roman.py b/strings/int_to_roman.py index 1da20120c..88866eae7 100644 --- a/strings/int_to_roman.py +++ b/strings/int_to_roman.py @@ -13,5 +13,3 @@ def int_to_roman(num): x = ["", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC"]; i = ["", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"]; return m[num//1000] + c[(num%1000)//100] + x[(num%100)//10] + i[num%10]; - -print(int_to_roman(644)) diff --git a/strings/is_palindrome.py b/strings/is_palindrome.py index 12746ef9b..0318bf5f4 100644 --- a/strings/is_palindrome.py +++ b/strings/is_palindrome.py @@ -55,18 +55,17 @@ def remove_punctuation(s): def string_reverse(s): return s[::-1] -def is_palidrome_reverse(s): +def is_palindrome_reverse(s): s = remove_punctuation(s) - reversed_string = string_reverse(s) # can also get rid of the string_reverse function and just do this return s == s[::-1] in one line. - if (s == reversed_string): + if (s == string_reverse(s)): return True return False # Variation 2 -def is_palidrome_two_pointer(s): +def is_palindrome_two_pointer(s): s = remove_punctuation(s) for i in range(0, len(s)//2): diff --git a/strings/license_number.py b/strings/license_number.py index 2d3a72469..6f6d9a42c 100644 --- a/strings/license_number.py +++ b/strings/license_number.py @@ -9,11 +9,3 @@ def license_number(key, k): if (i+1) % k == 0 and i != len(alnum)-1: res.append("-") return "".join(res[::-1]) - - -print(license_number("a-bc-dfd-df", 1), 1) -print(license_number("a-bc-dfd-df", 2), 2) -print(license_number("a-bc-dfd-df", 3), 3) -print(license_number("a-bc-dfd-df", 4), 4) -print(license_number("a-bc-dfd-df", 5), 5) - diff --git a/strings/make_sentence.py b/strings/make_sentence.py index d9d628fd0..8e6cb5b3b 100644 --- a/strings/make_sentence.py +++ b/strings/make_sentence.py @@ -25,10 +25,3 @@ def make_sentence(str_piece, dictionarys): if suffix in dictionarys or make_sentence(suffix, dictionarys): count += 1 return True - - -if __name__ == "__main__": - dictionarys = ["", "app", "let", "t", "apple", "applet"] - word = "applet" - make_sentence(word, dictionarys) - print(count) diff --git a/strings/merge_string_checker.py b/strings/merge_string_checker.py index bc252e724..004226e06 100644 --- a/strings/merge_string_checker.py +++ b/strings/merge_string_checker.py @@ -1,7 +1,9 @@ """ -At a job interview, you are challenged to write an algorithm to check if a given string, s, can be formed from two other strings, part1 and part2. -The restriction is that the characters in part1 and part2 are in the same order as in s. -The interviewer gives you the following example and tells you to figure out the rest from the given test cases. +At a job interview, you are challenged to write an algorithm to check if a +given string, s, can be formed from two other strings, part1 and part2. +The restriction is that the characters in part1 and part2 are in the same +order as in s. The interviewer gives you the following example and tells +you to figure out the rest from the given test cases. 'codewars' is a merge from 'cdw' and 'oears': s: c o d e w a r s = codewars part1: c d w = cdw diff --git a/strings/rabin_karp.py b/strings/rabin_karp.py index 51307db9a..d900a7380 100644 --- a/strings/rabin_karp.py +++ b/strings/rabin_karp.py @@ -5,7 +5,7 @@ class RollingHash: def __init__(self, text, size_word): self.text = text self.hash = 0 - self.sizeWord = size_word + self.size_word = size_word for i in range(0, size_word): #ord maps the character to a number @@ -20,7 +20,7 @@ def __init__(self, text, size_word): def move_window(self): if self.window_end <= len(self.text) - 1: #remove left letter from hash value - self.hash -= (ord(self.text[self.window_start]) - ord("a")+1)*26**(self.sizeWord-1) + self.hash -= (ord(self.text[self.window_start]) - ord("a")+1)*26**(self.size_word-1) self.hash *= 26 self.hash += ord(self.text[self.window_end])- ord("a")+1 self.window_start += 1 diff --git a/strings/reverse_string.py b/strings/reverse_string.py index dc695e2fe..f472135c7 100644 --- a/strings/reverse_string.py +++ b/strings/reverse_string.py @@ -4,9 +4,6 @@ def recursive(s): return s return recursive(s[l//2:]) + recursive(s[:l//2]) -s = "hello there" -print(recursive(s)) - def iterative(s): r = list(s) i, j = 0, len(s) - 1 @@ -16,13 +13,9 @@ def iterative(s): j -= 1 return "".join(r) -print(iterative(s)) - def pythonic(s): r = list(reversed(s)) return "".join(r) def ultra_pythonic(s): return s[::-1] - -print(ultra_pythonic(s)) diff --git a/strings/reverse_vowel.py b/strings/reverse_vowel.py index 70111ff34..b9fc6305e 100644 --- a/strings/reverse_vowel.py +++ b/strings/reverse_vowel.py @@ -11,7 +11,3 @@ def reverse_vowel(s): s[i], s[j] = s[j], s[i] i, j = i + 1, j - 1 return "".join(s) - -test = "hello" -print(test) -print(reverse_vowel(test)) diff --git a/strings/strip_url_params.py b/strings/strip_url_params.py index 4a07752c2..364f78091 100644 --- a/strings/strip_url_params.py +++ b/strings/strip_url_params.py @@ -6,7 +6,6 @@ An example: www.saadbenn.com?a=1&b=2&a=2') // returns 'www.saadbenn.com?a=1&b=2' """ -import unittest from collections import defaultdict import urllib import urllib.parse @@ -93,26 +92,4 @@ def strip_url_params3(url, strip=None): query = urllib.parse.urlencode(query) new = parse._replace(query=query) - return new.geturl() - - -class TestSuite(unittest.TestCase): - - def test_strip_url_params1(self): - - self.assertEqual(strip_url_params1("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") - self.assertEqual(strip_url_params1("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") - - - def test_strip_url_params2(self): - - self.assertEqual(strip_url_params2("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") - self.assertEqual(strip_url_params2("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") - - def test_strip_url_params3(self): - - self.assertEqual(strip_url_params3("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") - self.assertEqual(strip_url_params3("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") - -if __name__ == "__main__": - unittest.main() + return new.geturl() \ No newline at end of file diff --git a/strings/validate_coordinates.py b/strings/validate_coordinates.py index 8ae2dfbde..371214be0 100644 --- a/strings/validate_coordinates.py +++ b/strings/validate_coordinates.py @@ -28,13 +28,11 @@ def is_valid_coordinates_0(coordinates): l = coordinates.split(", ") if len(l) != 2: return False - print(l) try: latitude = float(l[0]) longitude = float(l[1]) except: return False - print(latitude, longitude) return -90 <= latitude <= 90 and -180 <= longitude <= 180 # friends solutions @@ -49,19 +47,3 @@ def is_valid_coordinates_1(coordinates): # using regular expression def is_valid_coordinates_regular_expression(coordinates): return bool(re.match("-?(\d|[1-8]\d|90)\.?\d*, -?(\d|[1-9]\d|1[0-7]\d|180)\.?\d*$", coordinates)) - -import unittest -class TestSuite(unittest.TestCase): - def test_valid(self): - valid_coordinates = ["-23, 25","4, -3","90, 180","-90, -180"] - for coordinate in valid_coordinates: - self.assertTrue(is_valid_coordinates_0(coordinate)) - - def test_invalid(self): - invalid_coordinates = ["23.234, - 23.4234","99.234, 12.324","6.325624, 43.34345.345","0, 1,2","23.245, 1e1"] - for coordinate in invalid_coordinates: - self.assertFalse(is_valid_coordinates_0(coordinate)) - - -if __name__ == "__main__": - unittest.main() diff --git a/strings/word_squares.py b/strings/word_squares.py index 7d05bb982..6614d212d 100644 --- a/strings/word_squares.py +++ b/strings/word_squares.py @@ -65,6 +65,3 @@ def build(square): build([word]) return squares -dic =["area","lead","wall","lady","ball"] -print(word_squares(dic)) - diff --git a/tests/test_strings.py b/tests/test_strings.py new file mode 100644 index 000000000..8cee75bcf --- /dev/null +++ b/tests/test_strings.py @@ -0,0 +1,366 @@ +from strings.add_binary import add_binary +from strings.breaking_bad import match_symbol, match_symbol_1, bracket +from strings.decode_string import decode_string +from strings.delete_reoccurring import delete_reoccurring_characters +from strings.domain_extractor import domain_name_1, domain_name_2 +from strings.encode_decode import encode, decode +from strings.group_anagrams import group_anagrams +from strings.int_to_roman import int_to_roman +from strings.is_palindrome import is_palindrome, is_palindrome_reverse, \ +is_palindrome_two_pointer, is_palindrome_stack +from strings.license_number import license_number +from strings.make_sentence import make_sentence +from strings.merge_string_checker import is_merge_recursive, is_merge_iterative +from strings.multiply_strings import multiply +from strings.one_edit_distance import is_one_edit, is_one_edit2 +from strings.rabin_karp import rabin_karp +from strings.reverse_string import * +from strings.reverse_vowel import reverse_vowel +from strings.reverse_words import reverse_words +from strings.roman_to_int import roman_to_int +from strings.strip_url_params import * +from strings.validate_coordinates import * +from strings.word_squares import word_squares + +import unittest + + +class TestAddBinary(unittest.TestCase): + """[summary] + Test for the file add_binary.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_add_binary(self): + self.assertEqual("100", add_binary("11", "1")) + self.assertEqual("101", add_binary("100", "1")) + self.assertEqual("10", add_binary("1", "1")) + + +class TestBreakingBad(unittest.TestCase): + """[summary] + Test for the file breaking_bad.py + + Arguments: + unittest {[type]} -- [description] + """ + + def setUp(self): + self.words = ['Amazon', 'Microsoft', 'Google'] + self.symbols = ['i', 'Am', 'cro', 'le', 'abc'] + self.result = ['M[i]crosoft', '[Am]azon', 'Mi[cro]soft', 'Goog[le]'] + def test_match_symbol(self): + self.assertEqual(self.result, match_symbol(self.words,self.symbols)) + def test_match_symbol_1(self): + self.assertEqual(['[Am]azon', 'Mi[cro]soft', 'Goog[le]'], match_symbol_1(self.words,self.symbols)) + def test_bracket(self): + self.assertEqual(('[Am]azon', 'Mi[cro]soft', 'Goog[le]'), bracket(self.words, self.symbols)) + + +class TestDecodeString(unittest.TestCase): + """[summary] + Test for the file decode_string.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_decode_string(self): + self.assertEqual("aaabcbc", decode_string("3[a]2[bc]")) + self.assertEqual("accaccacc", decode_string("3[a2[c]]")) + + +class TestDeleteReoccurring(unittest.TestCase): + """[summary] + Test for the file delete_reoccurring.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_delete_reoccurring_characters(self): + self.assertEqual("abc", delete_reoccurring_characters("aaabcccc")) + + +class TestDomainExtractor(unittest.TestCase): + """[summary] + Test for the file domain_extractor.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_valid(self): + self.assertEqual(domain_name_1("https://github.com/SaadBenn"), "github") + def test_invalid(self): + self.assertEqual(domain_name_2("http://google.com"), "google") + + +class TestEncodeDecode(unittest.TestCase): + """[summary] + Test for the file encode_decode.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_encode(self): + self.assertEqual("4:keon2:is7:awesome", encode("keon is awesome")) + def test_decode(self): + self.assertEqual(['keon', 'is', 'awesome'], decode("4:keon2:is7:awesome")) + + +class TestGroupAnagrams(unittest.TestCase): + """[summary] + Test for the file group_anagrams.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_group_anagrams(self): + self.assertEqual([['eat', 'tea', 'ate'], ['tan', 'nat'], ['bat']], \ + group_anagrams(["eat", "tea", "tan", "ate", "nat", "bat"])) + + +class TestIntToRoman(unittest.TestCase): + """[summary] + Test for the file int_to_roman.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_int_to_roman(self): + self.assertEqual("DCXLIV", int_to_roman(644)) + self.assertEqual("I", int_to_roman(1)) + self.assertEqual("MMMCMXCIX", int_to_roman(3999)) + + +class TestIsPalindrome(unittest.TestCase): + """[summary] + Test for the file is_palindrome.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_is_palindrome(self): + # 'Otto' is a old german name. + self.assertTrue(is_palindrome("Otto")) + self.assertFalse(is_palindrome("house")) + def test_is_palindrome_reverse(self): + # 'Otto' is a old german name. + self.assertTrue(is_palindrome_reverse("Otto")) + self.assertFalse(is_palindrome_reverse("house")) + def test_is_palindrome_two_pointer(self): + # 'Otto' is a old german name. + self.assertTrue(is_palindrome_two_pointer("Otto")) + self.assertFalse(is_palindrome_two_pointer("house")) + def test_is_palindrome_stack(self): + # 'Otto' is a old german name. + self.assertTrue(is_palindrome_stack("Otto")) + self.assertFalse(is_palindrome_stack("house")) + + +class TestLicenseNumber(unittest.TestCase): + """[summary] + Test for the file license_number.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_license_number(self): + self.assertEqual("a-b-c-d-f-d-d-f", license_number("a-bc-dfd-df", 1)) + self.assertEqual("ab-cd-fd-df", license_number("a-bc-dfd-df", 2)) + self.assertEqual("ab-cdf-ddf", license_number("a-bc-dfd-df", 3)) + self.assertEqual("abcd-fddf", license_number("a-bc-dfd-df", 4)) + self.assertEqual("abc-dfddf", license_number("a-bc-dfd-df", 5)) + + +class TestMakeSentence(unittest.TestCase): + """[summary] + Test for the file make_sentence.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_make_sentence(self): + dictionarys = ["", "app", "let", "t", "apple", "applet"] + word = "applet" + self.assertTrue(make_sentence(word, dictionarys)) + + +class TestMergeStringChecker(unittest.TestCase): + """[summary] + Test for the file merge_string_checker.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_is_merge_recursive(self): + self.assertTrue(is_merge_recursive("codewars", "cdw", "oears")) + def test_is_merge_iterative(self): + self.assertTrue(is_merge_iterative("codewars", "cdw", "oears")) + + +class TestMultiplyStrings(unittest.TestCase): + """[summary] + Test for the file multiply_strings.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_multiply(self): + self.assertEqual("23", multiply("1", "23")) + self.assertEqual("529", multiply("23", "23")) + self.assertEqual("0", multiply("0", "23")) + self.assertEqual("1000000", multiply("100", "10000")) + + +class TestOneEditDistance(unittest.TestCase): + """[summary] + Test for the file one_edit_distance.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_is_one_edit(self): + self.assertTrue(is_one_edit("abc", "abd")) + self.assertFalse(is_one_edit("abc", "aed")) + self.assertFalse(is_one_edit("abcd", "abcd")) + def test_is_one_edit2(self): + self.assertTrue(is_one_edit2("abc", "abd")) + self.assertFalse(is_one_edit2("abc", "aed")) + self.assertFalse(is_one_edit2("abcd", "abcd")) + + +class TestRabinKarp(unittest.TestCase): + """[summary] + Test for the file rabin_karp.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_rabin_karp(self): + self.assertEqual(3, rabin_karp("abc", "zsnabckfkd")) + self.assertEqual(None, rabin_karp("abc", "zsnajkskfkd")) + + +class TestReverseString(unittest.TestCase): + """[summary] + Test for the file reverse_string.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_recursive(self): + self.assertEqual("ereht olleh", recursive("hello there")) + def test_iterative(self): + self.assertEqual("ereht olleh", iterative("hello there")) + def test_pythonic(self): + self.assertEqual("ereht olleh", pythonic("hello there")) + def test_ultra_pythonic(self): + self.assertEqual("ereht olleh", ultra_pythonic("hello there")) + + +class TestReverseVowel(unittest.TestCase): + """[summary] + Test for the file reverse_vowel.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_reverse_vowel(self): + self.assertEqual("holle", reverse_vowel("hello")) + + +class TestReverseWords(unittest.TestCase): + """[summary] + Test for the file reverse_words.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_reverse_words(self): + self.assertEqual("pizza like I and kim keon am I", \ + reverse_words("I am keon kim and I like pizza")) + + +class TestRomanToInt(unittest.TestCase): + """[summary] + Test for the file roman_to_int.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_roman_to_int(self): + self.assertEqual(621, roman_to_int("DCXXI")) + self.assertEqual(1, roman_to_int("I")) + self.assertEqual(3999, roman_to_int("MMMCMXCIX")) + + +# class TestStripUrlParams(unittest.TestCase): +# """[summary] +# Test for the file strip_urls_params.py + +# Arguments: +# unittest {[type]} -- [description] +# """ + +# def test_strip_url_params1(self): +# self.assertEqual(strip_url_params1("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") +# self.assertEqual(strip_url_params1("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") +# def test_strip_url_params2(self): +# self.assertEqual(strip_url_params2("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") +# self.assertEqual(strip_url_params2("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") +# def test_strip_url_params3(self): +# self.assertEqual(strip_url_params3("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") +# self.assertEqual(strip_url_params3("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") + + +class TestValidateCoordinates(unittest.TestCase): + """[summary] + Test for the file validate_coordinates.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_valid(self): + valid_coordinates = ["-23, 25","4, -3","90, 180","-90, -180"] + for coordinate in valid_coordinates: + self.assertTrue(is_valid_coordinates_0(coordinate)) + def test_invalid(self): + invalid_coordinates = ["23.234, - 23.4234","99.234, 12.324","6.325624, 43.34345.345","0, 1,2","23.245, 1e1"] + for coordinate in invalid_coordinates: + self.assertFalse(is_valid_coordinates_0(coordinate)) + + +class TestWordSquares(unittest.TestCase): + """[summary] + Test for the file word_squares.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_word_squares(self): + self.assertEqual([['wall', 'area', 'lead', 'lady'], ['ball', 'area', 'lead', 'lady']], \ + word_squares(["area","lead","wall","lady","ball"])) + + +if __name__ == "__main__": + unittest.main() \ No newline at end of file From 9283343b2962ecc65d5cae97cdc20ea86e28d587 Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Wed, 25 Apr 2018 13:25:58 -0700 Subject: [PATCH 258/387] Add some bit manipulation (#253) * Add bit_operation to bit * Add swap_pair to bit * Add find_difference to bit * Add has_alternative_bit to bit * add another method for has_alternative_bit() * test for another method * corrected typo in spelling * Add insertion to bit * Add remove_bit to bit --- README.md | 6 +++ bit/bit_operation.py | 37 +++++++++++++++++ bit/find_difference.py | 28 +++++++++++++ bit/has_alternative_bit.py | 38 ++++++++++++++++++ bit/insert_bit.py | 44 +++++++++++++++++++++ bit/remove_bit.py | 15 +++++++ bit/swap_pair.py | 21 ++++++++++ tests/test_bit.py | 81 ++++++++++++++++++++++++++++++++++++++ 8 files changed, 270 insertions(+) create mode 100644 bit/bit_operation.py create mode 100644 bit/find_difference.py create mode 100644 bit/has_alternative_bit.py create mode 100644 bit/insert_bit.py create mode 100644 bit/remove_bit.py create mode 100644 bit/swap_pair.py diff --git a/README.md b/README.md index 9635856b8..d659d56a1 100644 --- a/README.md +++ b/README.md @@ -73,6 +73,12 @@ For running all tests write down: - [single_number](bit/single_number.py) - [subsets](bit/subsets.py) - [add_bitwise_operator](bit/add_bitwise_operator.py) + - [bit_operation](bit/bit_operation.py) + - [swap_pair](bit/swap_pair.py) + - [find_difference](bit/find_difference.py) + - [has_alternative_bit](bit/has_alternative_bit.py) + - [insert_bit](bit/insert_bit.py) + - [remove_bit](bit/remove_bit.py) - [calculator](calculator) - [math_parser](calculator/math_parser.py) - [dfs](dfs) diff --git a/bit/bit_operation.py b/bit/bit_operation.py new file mode 100644 index 000000000..58f7d7559 --- /dev/null +++ b/bit/bit_operation.py @@ -0,0 +1,37 @@ +""" +Fundamental bit operation: + get_bit(num, i): get an exact bit at specific index + set_bit(num, i): set a bit at specific index + clear_bit(num, i): clear a bit at specific index + update_bit(num, i, bit): update a bit at specific index +""" + +""" +This function shifts 1 over by i bits, creating a value being like 0001000. By +performing an AND with num, we clear all bits other than the bit at bit i. +Finally we compare that to 0 +""" +def get_bit(num, i): + return (num & (1 << i)) != 0 + +""" +This function shifts 1 over by i bits, creating a value being like 0001000. By +performing an OR with num, only value at bit i will change. +""" +def set_bit(num, i): + return num | (1 << i) + +""" +This method operates in almost the reverse of set_bit +""" +def clear_bit(num, i): + mask = ~(1 << i) + return num & mask + +""" +To set the ith bit to value, we first clear the bit at position i by using a +mask. Then, we shift the intended value. Finally we OR these two numbers +""" +def update_bit(num, i, bit): + mask = ~(1 << i) + return (num & mask) | (bit << i) diff --git a/bit/find_difference.py b/bit/find_difference.py new file mode 100644 index 000000000..67f2f0608 --- /dev/null +++ b/bit/find_difference.py @@ -0,0 +1,28 @@ +""" +Given two strings s and t which consist of only lowercase letters. +String t is generated by random shuffling string s and then add one more letter +at a random position. Find the letter that was added in t. + +For example: +Input: +s = "abcd" +t = "abecd" +Output: 'e' + +Explanation: +'e' is the letter that was added. +""" + +""" +We use the characteristic equation of XOR. +A xor B xor C = A xor C xor B +If A == C, then A xor C = 0 +and then, B xor 0 = B +""" +def find_difference(s, t): + ret = 0 + for ch in s + t: + # ord(ch) return an integer representing the Unicode code point of that character + ret = ret ^ ord(ch) + # chr(i) Return the string representing a character whose Unicode code point is the integer i + return chr(ret) diff --git a/bit/has_alternative_bit.py b/bit/has_alternative_bit.py new file mode 100644 index 000000000..ade2f56a6 --- /dev/null +++ b/bit/has_alternative_bit.py @@ -0,0 +1,38 @@ +""" +Given a positive integer, check whether it has alternating bits: namely, +if two adjacent bits will always have different values. + +For example: +Input: 5 +Output: True because the binary representation of 5 is: 101. + +Input: 7 +Output: False because the binary representation of 7 is: 111. + +Input: 11 +Output: False because the binary representation of 11 is: 1011. + +Input: 10 +Output: True because The binary representation of 10 is: 1010. +""" + +# Time Complexity - O(number of bits in n) +def has_alternative_bit(n): + first_bit = 0 + second_bit = 0 + while n: + first_bit = n & 1 + if n >> 1: + second_bit = (n >> 1) & 1 + if not first_bit ^ second_bit: + return False + else: + return True + n = n >> 1 + return True + +# Time Complexity - O(1) +def has_alternative_bit_fast(n): + mask1 = int('aaaaaaaa', 16) # for bits ending with zero (...1010) + mask2 = int('55555555', 16) # for bits ending with one (...0101) + return mask1 == (n + (n ^ mask1)) or mask2 == (n + (n ^ mask2)) diff --git a/bit/insert_bit.py b/bit/insert_bit.py new file mode 100644 index 000000000..f799489c8 --- /dev/null +++ b/bit/insert_bit.py @@ -0,0 +1,44 @@ +""" +Insertion: + +insert_one_bit(num, bit, i): insert exact one bit at specific position +For example: + +Input: num = 10101 (21) +insert_one_bit(num, 1, 2): 101101 (45) +insert_one_bit(num, 0 ,2): 101001 (41) +insert_one_bit(num, 1, 5): 110101 (53) +insert_one_bit(num, 1, 0): 101011 (43) + +insert_mult_bits(num, bits, len, i): insert multiple bits with len at specific position +For example: + +Input: num = 101 (5) +insert_mult_bits(num, 7, 3, 1): 101111 (47) +insert_mult_bits(num, 7, 3, 0): 101111 (47) +insert_mult_bits(num, 7, 3, 3): 111101 (61) +""" + +""" +Insert exact one bit at specific position + +Algorithm: +1. Create a mask having bit from i to the most significant bit, and append the new bit at 0 position +2. Keep the bit from 0 position to i position ( like 000...001111) +3) Merge mask and num +""" +def insert_one_bit(num, bit, i): + # Create mask + mask = num >> i + mask = (mask << 1) | bit + mask = mask << i + # Keep the bit from 0 position to i position + right = ((1 << i) - 1) & num + return right | mask + +def insert_mult_bits(num, bits, len, i): + mask = num >> i + mask = (mask << len) | bits + mask = mask << i + right = ((1 << i) - 1) & num + return right | mask diff --git a/bit/remove_bit.py b/bit/remove_bit.py new file mode 100644 index 000000000..b302cf986 --- /dev/null +++ b/bit/remove_bit.py @@ -0,0 +1,15 @@ +""" +Remove_bit(num, i): remove a bit at specific position. +For example: + +Input: num = 10101 (21) +remove_bit(num, 2): output = 1001 (9) +remove_bit(num, 4): output = 101 (5) +remove_bit(num, 0): output = 1010 (10) +""" + +def remove_bit(num, i): + mask = num >> (i + 1) + mask = mask << i + right = ((1 << i) - 1) & num + return mask | right diff --git a/bit/swap_pair.py b/bit/swap_pair.py new file mode 100644 index 000000000..c1bf75811 --- /dev/null +++ b/bit/swap_pair.py @@ -0,0 +1,21 @@ +""" +Swap_pair: A function swap odd and even bits in an integer with as few instructions +as possible (Ex bit and bit 1 are swapped, bit 2 and bit 3 are swapped) + +For example: +22: 010110 --> 41: 101001 +10: 1010 --> 5 : 0101 +""" + +""" +We can approach this as operating on the odds bit first, and then the even bits. +We can mask all odd bits with 10101010 in binary ('AA') then shift them right by 1 +Similarly, we mask all even bit with 01010101 in binary ('55') then shift them left +by 1. Finally, we merge these two values by OR operation. +""" +def swap_pair(num): + # odd bit arithmetic right shift 1 bit + odd = (num & int('AAAAAAAA', 16)) >> 1 + # even bit left shift 1 bit + even = (num & int('55555555', 16)) << 1 + return odd | even diff --git a/tests/test_bit.py b/tests/test_bit.py index fc5f2b50f..c9bafea05 100644 --- a/tests/test_bit.py +++ b/tests/test_bit.py @@ -6,6 +6,12 @@ from bit.single_number import single_number from bit.single_number2 import single_number2 from bit.subsets import subsets +from bit.bit_operation import get_bit, set_bit, clear_bit, update_bit +from bit.swap_pair import swap_pair +from bit.find_difference import find_difference +from bit.has_alternative_bit import has_alternative_bit, has_alternative_bit_fast +from bit.insert_bit import insert_one_bit, insert_mult_bits +from bit.remove_bit import remove_bit import unittest import random @@ -125,5 +131,80 @@ def test_subsets(self): (10, 30, 40), (30,), (20, 30), (30, 40), (10,), (), (10, 20), (20, 40), (20, 30, 40), (10, 20, 30), (20,)}) + def test_get_bit(self): + # 22 = 10110 + self.assertEqual(1, get_bit(22, 2)) + self.assertEqual(0, get_bit(22, 3)) + + def test_set_bit(self): + # 22 = 10110 --> after set bit at 3th position: 30 = 11110 + self.assertEqual(30, set_bit(22, 3)) + + def test_clear_bit(self): + # 22 = 10110 --> after clear bit at 2nd position: 20 = 10010 + self.assertEqual(18, clear_bit(22, 2)) + + def test_update_bit(self): + # 22 = 10110 --> after update bit at 3th position with value 1: 30 = 11110 + self.assertEqual(30, update_bit(22, 3, 1)) + # 22 = 10110 --> after update bit at 2nd position with value 0: 20 = 10010 + self.assertEqual(18, update_bit(22, 2, 0)) + + def test_swap_pair(self): + # 22: 10110 --> 41: 101001 + self.assertEqual(41, swap_pair(22)) + # 10: 1010 --> 5 : 0101 + self.assertEqual(5, swap_pair(10)) + + def test_find_difference(self): + self.assertEqual('e', find_difference("abcd", "abecd")) + + def test_has_alternative_bit(self): + self.assertTrue(has_alternative_bit(5)) + self.assertFalse(has_alternative_bit(7)) + self.assertFalse(has_alternative_bit(11)) + self.assertTrue(has_alternative_bit(10)) + + def test_has_alternative_bit_fast(self): + self.assertTrue(has_alternative_bit_fast(5)) + self.assertFalse(has_alternative_bit_fast(7)) + self.assertFalse(has_alternative_bit_fast(11)) + self.assertTrue(has_alternative_bit_fast(10)) + + def test_insert_one_bit(self): + """ + Input: num = 10101 (21) + insert_one_bit(num, 1, 2): 101101 (45) + insert_one_bit(num, 0 ,2): 101001 (41) + insert_one_bit(num, 1, 5): 110101 (53) + insert_one_bit(num, 1, 0): 101010 (42) + """ + self.assertEqual(45, insert_one_bit(21, 1, 2)) + self.assertEqual(41, insert_one_bit(21, 0, 2)) + self.assertEqual(53, insert_one_bit(21, 1, 5)) + self.assertEqual(43, insert_one_bit(21, 1, 0)) + + def test_insert_mult_bits(self): + """ + Input: num = 101 (5) + insert_mult_bits(num, 7, 3, 1): 101111 (47) + insert_mult_bits(num, 7, 3, 0): 101111 (47) + insert_mult_bits(num, 7, 3, 3): 111101 (61) + """ + self.assertEqual(47, insert_mult_bits(5, 7, 3, 1)) + self.assertEqual(47, insert_mult_bits(5, 7, 3, 0)) + self.assertEqual(61, insert_mult_bits(5, 7, 3, 3)) + + def test_remove_bit(self): + """ + Input: num = 10101 (21) + remove_bit(num, 2): output = 1001 (9) + remove_bit(num, 4): output = 101 (5) + remove_bit(num, 0): output = 1010 (10) + """ + self.assertEqual(9, remove_bit(21, 2)) + self.assertEqual(5, remove_bit(21, 4)) + self.assertEqual(10, remove_bit(21, 0)) + if __name__ == '__main__': unittest.main() From 8089750d5dccadb0603068eefec869df4f8360cc Mon Sep 17 00:00:00 2001 From: Sa'd Date: Fri, 27 Apr 2018 17:17:25 -0500 Subject: [PATCH 259/387] Add fizzbuzz.py in strings folder --- strings/fizzbuzz.py | 55 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 strings/fizzbuzz.py diff --git a/strings/fizzbuzz.py b/strings/fizzbuzz.py new file mode 100644 index 000000000..09078563b --- /dev/null +++ b/strings/fizzbuzz.py @@ -0,0 +1,55 @@ +""" +Wtite a function that returns an array containing the numbers from 1 to N, +where N is the parametered value. N will never be less than 1. + +Replace certain values however if any of the following conditions are met: + +If the value is a multiple of 3: use the value 'Fizz' instead +If the value is a multiple of 5: use the value 'Buzz' instead +If the value is a multiple of 3 & 5: use the value 'FizzBuzz' instead +""" + +""" +There is no fancy algorithm to solve fizz buzz. + +Iterate from 1 through n +Use the mod operator to determine if the current iteration is divisible by: +3 and 5 -> 'FizzBuzz' +3 -> 'Fizz' +5 -> 'Buzz' +else -> string of current iteration +return the results +Complexity: + +Time: O(n) +Space: O(n) +""" + +def fizzbuzz(n): + + # Validate the input + if n < 1: + raise ValueError('n cannot be less than one') + if n is None: + raise TypeError('n cannot be None') + + result = [] + + for i in range(1, n+1): + if i%3 == 0 and i%5 == 0: + result.append('FizzBuzz') + elif i%3 == 0: + result.append('Fizz') + elif i%5 == 0: + result.append('Buzz') + else: + result.append(i) + return result + +# Alternative solution +def fizzbuzz_with_helper_func(n): + return [fb(m) for m in range(1,n+1)] + +def fb(m): + r = (m % 3 == 0) * "Fizz" + (m % 5 == 0) * "Buzz" + return r if r != "" else m From 63456500d096e7129756bd6bce9802a171e3804a Mon Sep 17 00:00:00 2001 From: Sa'd Date: Fri, 27 Apr 2018 17:19:31 -0500 Subject: [PATCH 260/387] Add fizzbuzz.py to README.md The algorithm is in strings folder of the repo. --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index d659d56a1..a2ce964f7 100644 --- a/README.md +++ b/README.md @@ -212,6 +212,7 @@ For running all tests write down: - [remove_min](stack/remove_min.py) - [is_sorted](stack/is_sorted.py) - [strings](strings) + - [fizzbuzz](strings/fizzbuzz.py) - [delete_reoccurring_characters](strings/delete_reoccurring_characters.py) - [strip_url_params](strings/strip_url_params.py) - [validate_coordinates](strings/validate_coordinates.py) From 463e9fb82bc6401efad8927a77ca67543e1f4339 Mon Sep 17 00:00:00 2001 From: Keon Date: Sat, 28 Apr 2018 09:50:33 -0400 Subject: [PATCH 261/387] add single_number3: find two elements that appear only once (#260) * add single_number3: find two elements that appear only once * update README.md - add single_number3 * update single number 3 --- README.md | 3 ++- bit/single_number3.py | 49 +++++++++++++++++++++++++++++++++++++++++++ tests/test_bit.py | 7 +++++++ 3 files changed, 58 insertions(+), 1 deletion(-) create mode 100644 bit/single_number3.py diff --git a/README.md b/README.md index a2ce964f7..7c229318f 100644 --- a/README.md +++ b/README.md @@ -69,8 +69,9 @@ For running all tests write down: - [find_missing_number](bit/find_missing_number.py) - [power_of_two](bit/power_of_two.py) - [reverse_bits](bit/reverse_bits.py) - - [single_number2](bit/single_number2.py) - [single_number](bit/single_number.py) + - [single_number2](bit/single_number2.py) + - [single_number3](bit/single_number3.py) - [subsets](bit/subsets.py) - [add_bitwise_operator](bit/add_bitwise_operator.py) - [bit_operation](bit/bit_operation.py) diff --git a/bit/single_number3.py b/bit/single_number3.py new file mode 100644 index 000000000..5182bd271 --- /dev/null +++ b/bit/single_number3.py @@ -0,0 +1,49 @@ +""" +Given an array of numbers nums, +in which exactly two elements appear only once +and all the other elements appear exactly twice. +Find the two elements that appear only once. +Limitation: Time Complexity: O(N) and Space Complexity O(1) + +For example: + +Given nums = [1, 2, 1, 3, 2, 5], return [3, 5]. + +Note: +The order of the result is not important. +So in the above example, [5, 3] is also correct. + + +Solution: +1. Use XOR to cancel out the pairs and isolate A^B +2. It is guaranteed that at least 1 bit exists in A^B since + A and B are different numbers. ex) 010 ^ 111 = 101 +3. Single out one bit R (right most bit in this solution) to use it as a pivot +4. Divide all numbers into two groups. + One group with a bit in the position R + One group without a bit in the position R +5. Use the same strategy we used in step 1 to isolate A and B from each group. +""" + + +def single_number3(nums): + """ + :type nums: List[int] + :rtype: List[int] + """ + # isolate a^b from pairs using XOR + ab = 0 + for n in nums: + ab ^= n + + # isolate right most bit from a^b + right_most = ab & (-ab) + + # isolate a and b from a^b + a, b = 0, 0 + for n in nums: + if n & right_most: + a ^= n + else: + b ^= n + return [a, b] diff --git a/tests/test_bit.py b/tests/test_bit.py index c9bafea05..33d80d9b5 100644 --- a/tests/test_bit.py +++ b/tests/test_bit.py @@ -5,6 +5,7 @@ from bit.reverse_bits import reverse_bits from bit.single_number import single_number from bit.single_number2 import single_number2 +from bit.single_number3 import single_number3 from bit.subsets import subsets from bit.bit_operation import get_bit, set_bit, clear_bit, update_bit from bit.swap_pair import swap_pair @@ -121,6 +122,12 @@ def test_single_number2(self): random.shuffle(nums) self.assertEqual(single, single_number2(nums)) + def test_single_number3(self): + self.assertEqual(sorted([2,5]), + sorted(single_number3([2, 1, 5, 6, 6, 1]))) + self.assertEqual(sorted([4,3]), + sorted(single_number3([9, 9, 4, 3]))) + def test_subsets(self): self.assertSetEqual(subsets([1, 2, 3]), From 9c1d282e13bc346242167402cb27dec84283499b Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Sat, 28 Apr 2018 10:56:19 -0700 Subject: [PATCH 262/387] Add coverall to algorithms (#261) * Add coverall to Algorithms * Add .coverage to gitignore * Fix prime_test in tests.math * Add coveral badge to README * Change the prime_test to prime_check --- .coveragerc | 5 +++++ .gitignore | 3 ++- .travis.yml | 8 ++++++++ README.md | 3 ++- maths/{prime_test.py => prime_check.py} | 8 ++++---- tests/test_maths.py | 12 ++++++------ 6 files changed, 27 insertions(+), 12 deletions(-) create mode 100644 .coveragerc rename maths/{prime_test.py => prime_check.py} (92%) diff --git a/.coveragerc b/.coveragerc new file mode 100644 index 000000000..a5f7fcee8 --- /dev/null +++ b/.coveragerc @@ -0,0 +1,5 @@ +[report] +omit = + */python?.?/* + */site-packages/nose/* + *__init__* diff --git a/.gitignore b/.gitignore index 409fb539f..2edbd24cc 100755 --- a/.gitignore +++ b/.gitignore @@ -2,4 +2,5 @@ __pycache__/ *.py[cod] .idea/ .cache/ -.pytest_cache/ \ No newline at end of file +.pytest_cache/ +.coverage diff --git a/.travis.yml b/.travis.yml index 88334304b..dd56f3539 100644 --- a/.travis.yml +++ b/.travis.yml @@ -12,6 +12,9 @@ matrix: install: - pip install -r requirements.txt - pip install flake8 # pytest # add another testing frameworks later + - pip install python-coveralls + - pip install coverage + - pip install nose before_script: # stop the build if there are Python syntax errors or undefined names - flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics @@ -22,6 +25,11 @@ script: - python3 -m unittest discover tests # Check pytest running - python3 -m pytest tests + # Run nose with coverage support + - nosetests --with-coverage notifications: on_success: change on_failure: change # `always` will be the setting once code changes slow down + +after_success: + - coveralls diff --git a/README.md b/README.md index 7c229318f..28bde7986 100644 --- a/README.md +++ b/README.md @@ -2,6 +2,7 @@ English | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/R [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) [![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) +[![Coverage Status](https://coveralls.io/repos/github/keon/algorithms/badge.svg?branch=master)](https://coveralls.io/github/keon/algorithms?branch=master) Pythonic Data Structures and Algorithms ========================================= @@ -153,7 +154,7 @@ For running all tests write down: - [next_bigger](maths/next_bigger.py) - [next_perfect_square](maths/next_perfect_square.py) - [nth_digit](maths/nth_digit.py) - - [prime_test](maths/prime_test.py) + - [prime_check](maths/prime_check.py) - [primes_sieve_of_eratosthenes](maths/primes_sieve_of_eratosthenes.py) - [pythagoras](maths/pythagoras.py) - [rabin_miller](maths/rabin_miller.py) diff --git a/maths/prime_test.py b/maths/prime_check.py similarity index 92% rename from maths/prime_test.py rename to maths/prime_check.py index ba670717f..1821d250b 100644 --- a/maths/prime_test.py +++ b/maths/prime_check.py @@ -2,7 +2,7 @@ prime_test(n) returns a True if n is a prime number else it returns False """ -def prime_test(n): +def prime_check(n): if n <= 1: return False if n == 2 or n == 3: @@ -17,7 +17,7 @@ def prime_test(n): return True -def prime_test2(n): +def prime_check2(n): # prime numbers are greater than 1 if n > 1: # check for factors @@ -26,11 +26,11 @@ def prime_test2(n): # print(num, "is not a prime number") # print(i, "times", num//i, "is", num) return False - + # print(num, "is a prime number") return True # if input number is less than # or equal to 1, it is not prime else: - return False \ No newline at end of file + return False diff --git a/tests/test_maths.py b/tests/test_maths.py index 631c0e14e..a7567f72f 100644 --- a/tests/test_maths.py +++ b/tests/test_maths.py @@ -4,7 +4,7 @@ from maths.generate_strobogrammtic import gen_strobogrammatic, strobogrammatic_in_range from maths.is_strobogrammatic import is_strobogrammatic, is_strobogrammatic2 from maths.next_perfect_square import find_next_square, find_next_square2 -from maths.prime_test import prime_test +from maths.prime_check import prime_check, prime_check2 from maths.primes_sieve_of_eratosthenes import primes from maths.pythagoras import pythagoras from maths.rabin_miller import is_prime @@ -96,7 +96,7 @@ def test_is_strobogrammatic2(self): class TestNextPerfectSquare(unittest.TestCase): """[summary] Test for the file next_perfect_square.py - + Arguments: unittest {[type]} -- [description] """ @@ -137,7 +137,7 @@ def test_prime_test(self): """ counter = 0 for i in range(2, 101): - if prime_test(i): + if prime_check(i): counter += 1 self.assertEqual(25, counter) @@ -148,14 +148,14 @@ def test_prime_test2(self): """ counter = 0 for i in range(2, 101): - if prime_test(i): + if prime_check2(i): counter += 1 self.assertEqual(25, counter) class TestPythagoras(unittest.TestCase): """[summary] - Test for the file pythagoras.py + Test for the file pythagoras.py Arguments: unittest {[type]} -- [description] @@ -188,7 +188,7 @@ class TestRSA(unittest.TestCase): """ def test_encrypt_decrypt(self): - + self.assertEqual(7, decrypt(encrypt(7, 23, 143), 47, 143)) # def test_key_generator(self): # this test takes a while! From b43156120092dd5a42a1d94ed00cfadd522d9f93 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sun, 29 Apr 2018 18:33:51 +0200 Subject: [PATCH 263/387] added fibonacci --- dp/fib.py | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 dp/fib.py diff --git a/dp/fib.py b/dp/fib.py new file mode 100644 index 000000000..f46e84ab7 --- /dev/null +++ b/dp/fib.py @@ -0,0 +1,43 @@ +def fib_recursive(n): + """[summary] + Computes the n-th fibonacci number recursive. + Problem: This implementation is very slow. + approximate O(2^n) + + Arguments: + n {[int]} -- [description] + + Returns: + [int] -- [description] + """ + + # precondition + assert n >= 0, 'n must be a positive integer' + + if n <= 1: + return n + else: + return fibRecursive(n-1) + fibRecursive(n-2) + +def fib_list(n): + """[summary] + This algorithm computes the n-th fibbonacci number + very quick. approximate O(n) + The algorithm use dynamic programming. + + Arguments: + n {[int]} -- [description] + + Returns: + [int] -- [description] + """ + + # precondition + assert n >= 0, 'n must be a positive integer' + + list_results = [0, 1] + for i in range(2, n+1): + list_results.append(list_results[i-1] + list_results[i-2]) + return list_results[n] + +print(fib_list(100)) # => 354224848179261915075 From c36a410a9ebe7c8f54719a7bd853c9a294e09d15 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sun, 29 Apr 2018 18:35:40 +0200 Subject: [PATCH 264/387] added print --- dp/fib.py | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/dp/fib.py b/dp/fib.py index f46e84ab7..f1658d7d1 100644 --- a/dp/fib.py +++ b/dp/fib.py @@ -17,7 +17,9 @@ def fib_recursive(n): if n <= 1: return n else: - return fibRecursive(n-1) + fibRecursive(n-2) + return fib_recursive(n-1) + fib_recursive(n-2) + +# print(fib_recursive(35)) # => 9227465 (slow) def fib_list(n): """[summary] @@ -40,4 +42,4 @@ def fib_list(n): list_results.append(list_results[i-1] + list_results[i-2]) return list_results[n] -print(fib_list(100)) # => 354224848179261915075 +# print(fib_list(100)) # => 354224848179261915075 From db0a10f4fd8969f7a36877b2258c06ef0957e8a2 Mon Sep 17 00:00:00 2001 From: Roger Li Date: Sun, 29 Apr 2018 12:48:50 -0400 Subject: [PATCH 265/387] Update quick_sort.py Correct the best case time complexity --- sort/quick_sort.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sort/quick_sort.py b/sort/quick_sort.py index bec81328e..ac91d6b49 100644 --- a/sort/quick_sort.py +++ b/sort/quick_sort.py @@ -1,6 +1,6 @@ def quick_sort(arr, first, last): """ Quicksort - Complexity: best O(n) avg O(n log(n)), worst O(N^2) + Complexity: best O(n log(n)) avg O(n log(n)), worst O(N^2) """ if first < last: pos = partition(arr, first, last) From 0dd1f7233b3c463c931e01fe00d3cc9e24789291 Mon Sep 17 00:00:00 2001 From: Keon Date: Sun, 29 Apr 2018 13:06:02 -0400 Subject: [PATCH 266/387] Delete temporary.md (#267) --- tmp/temporary.md | 29 ----------------------------- 1 file changed, 29 deletions(-) delete mode 100644 tmp/temporary.md diff --git a/tmp/temporary.md b/tmp/temporary.md deleted file mode 100644 index 7f1f3247b..000000000 --- a/tmp/temporary.md +++ /dev/null @@ -1,29 +0,0 @@ -Given input which is a vector of (user name, log-in time, log-out time), -output time series which will have number of users logged in at each given -time slot in the input, output should only contain time slots which are given -in input for example if the input is "September", 1.2, 4.5), -("June", 3.1, 6.7), ("August", 8.9, 10.3) output should contain only -1.2, 3.1, 4.5, 3.1, 6.7, 8.9, 10.3 -Example: /* [ ("September", 1.2, 4.5), ("June", 3.1, 6.7), ("August", 8.9, 10.3) ] => -[(1.2, 1), (3.1, 2), (4.5, 1), (6.7, 0), (8.9, 1), (10.3, 0)] */ - - -• Sweeping line method - § record the time instance and it type: log in, log out - § Sort the time instances. Keep a variable to record the number of logged in users, number - § For a time instance, - □ if it is log-in type, number++, print -else number--, print - - -1. Constant time random access hash implementation - -2. Efficient elevator API - -3. Ransom note - -4. Median of k unsorted arrays - -5. Design of a task scheduler - -6. Custom comparator From 176899775fc4b247326374d893dbd676bbb8cde2 Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Sun, 29 Apr 2018 16:35:16 -0700 Subject: [PATCH 267/387] Add test_queue to tests (#262) --- queues/max_sliding_window.py | 23 --------- queues/queue.py | 93 ------------------------------------ queues/reconstruct_queue.py | 4 +- tests/test_queues.py | 90 ++++++++++++++++++++++++++++++++++ 4 files changed, 91 insertions(+), 119 deletions(-) create mode 100644 tests/test_queues.py diff --git a/queues/max_sliding_window.py b/queues/max_sliding_window.py index 4c981fe45..7d1a45f11 100644 --- a/queues/max_sliding_window.py +++ b/queues/max_sliding_window.py @@ -18,9 +18,6 @@ """ import collections -import unittest - - def max_sliding_window(arr, k): qi = collections.deque() # queue storing indexes of elements result = [] @@ -33,23 +30,3 @@ def max_sliding_window(arr, k): if i >= k - 1: result.append(arr[qi[0]]) return result - - -class TestSuite(unittest.TestCase): - - def test_max_sliding_window(self): - - array = [1, 3, -1, -3, 5, 3, 6, 7] - self.assertEqual(max_sliding_window(array, k=5), [5, 5, 6, 7]) - self.assertEqual(max_sliding_window(array, k=3), [3, 3, 5, 5, 6, 7]) - self.assertEqual(max_sliding_window(array, k=7), [6, 7]) - - array = [8, 5, 10, 7, 9, 4, 15, 12, 90, 13] - self.assertEqual(max_sliding_window(array, k=4), [10, 10, 10, 15, 15, 90, 90]) - self.assertEqual(max_sliding_window(array, k=7), [15, 15, 90, 90]) - self.assertEqual(max_sliding_window(array, k=2), [8, 10, 10, 9, 9, 15, 15, 90, 90]) - - -if __name__ == '__main__': - - unittest.main() \ No newline at end of file diff --git a/queues/queue.py b/queues/queue.py index 618fd2343..feab56b62 100644 --- a/queues/queue.py +++ b/queues/queue.py @@ -12,10 +12,7 @@ It needs no parameters and returns an integer. * peek() returns the front element of the queue. """ -import unittest from abc import ABCMeta, abstractmethod - - class AbstractQueue(metaclass=ABCMeta): def __init__(self): @@ -99,7 +96,6 @@ def __init__(self, value): self.value = value self.next = None - class LinkedListQueue(AbstractQueue): def __init__(self): @@ -142,92 +138,3 @@ def peek(self): if self.is_empty(): raise IndexError("Queue is empty") return self._front.value - - -# TODO -class HeapPriorityQueue(AbstractQueue): - - def __init__(self): - super().__init__() - pass - - def __iter__(self): - pass - - def enqueue(self, value): - pass - - def dequeue(self): - pass - - def peek(self): - pass - - -class TestSuite(unittest.TestCase): - """ - Test suite for the Queue data structures. - """ - - def test_ArrayQueue(self): - queue = ArrayQueue() - queue.enqueue(1) - queue.enqueue(2) - queue.enqueue(3) - - # test __iter__() - it = iter(queue) - self.assertEqual(1, next(it)) - self.assertEqual(2, next(it)) - self.assertEqual(3, next(it)) - self.assertRaises(StopIteration, next, it) - - # test __len__() - self.assertEqual(3, len(queue)) - - # test is_empty() - self.assertFalse(queue.is_empty()) - - # test peek() - self.assertEqual(1, queue.peek()) - - # test dequeue() - self.assertEqual(1, queue.dequeue()) - self.assertEqual(2, queue.dequeue()) - self.assertEqual(3, queue.dequeue()) - - self.assertTrue(queue.is_empty()) - - def test_LinkedListQueue(self): - queue = LinkedListQueue() - queue.enqueue(1) - queue.enqueue(2) - queue.enqueue(3) - - # test __iter__() - it = iter(queue) - self.assertEqual(1, next(it)) - self.assertEqual(2, next(it)) - self.assertEqual(3, next(it)) - self.assertRaises(StopIteration, next, it) - - # test __len__() - self.assertEqual(3, len(queue)) - - # test is_empty() - self.assertFalse(queue.is_empty()) - - # test peek() - self.assertEqual(1, queue.peek()) - - # test dequeue() - self.assertEqual(1, queue.dequeue()) - self.assertEqual(2, queue.dequeue()) - self.assertEqual(3, queue.dequeue()) - - self.assertTrue(queue.is_empty()) - - -if __name__ == "__main__": - - unittest.main() diff --git a/queues/reconstruct_queue.py b/queues/reconstruct_queue.py index 56069bc35..b86a67cd0 100644 --- a/queues/reconstruct_queue.py +++ b/queues/reconstruct_queue.py @@ -23,7 +23,5 @@ def reconstruct_queue(people): queue = [] people.sort(key=lambda x: (-x[0], x[1])) for h, k in people: - queue.insert(k, (h, k)) + queue.insert(k, [h, k]) return queue - - diff --git a/tests/test_queues.py b/tests/test_queues.py new file mode 100644 index 000000000..23afc29a4 --- /dev/null +++ b/tests/test_queues.py @@ -0,0 +1,90 @@ +from queues.queue import ArrayQueue, LinkedListQueue +from queues.max_sliding_window import max_sliding_window +from queues.reconstruct_queue import reconstruct_queue + +import unittest + +class TestQueue(unittest.TestCase): + """ + Test suite for the Queue data structures. + """ + + def test_ArrayQueue(self): + queue = ArrayQueue() + queue.enqueue(1) + queue.enqueue(2) + queue.enqueue(3) + + # test __iter__() + it = iter(queue) + self.assertEqual(1, next(it)) + self.assertEqual(2, next(it)) + self.assertEqual(3, next(it)) + self.assertRaises(StopIteration, next, it) + + # test __len__() + self.assertEqual(3, len(queue)) + + # test is_empty() + self.assertFalse(queue.is_empty()) + + # test peek() + self.assertEqual(1, queue.peek()) + + # test dequeue() + self.assertEqual(1, queue.dequeue()) + self.assertEqual(2, queue.dequeue()) + self.assertEqual(3, queue.dequeue()) + + self.assertTrue(queue.is_empty()) + + def test_LinkedListQueue(self): + queue = LinkedListQueue() + queue.enqueue(1) + queue.enqueue(2) + queue.enqueue(3) + + # test __iter__() + it = iter(queue) + self.assertEqual(1, next(it)) + self.assertEqual(2, next(it)) + self.assertEqual(3, next(it)) + self.assertRaises(StopIteration, next, it) + + # test __len__() + self.assertEqual(3, len(queue)) + + # test is_empty() + self.assertFalse(queue.is_empty()) + + # test peek() + self.assertEqual(1, queue.peek()) + + # test dequeue() + self.assertEqual(1, queue.dequeue()) + self.assertEqual(2, queue.dequeue()) + self.assertEqual(3, queue.dequeue()) + + self.assertTrue(queue.is_empty()) + +class TestSuite(unittest.TestCase): + + def test_max_sliding_window(self): + + array = [1, 3, -1, -3, 5, 3, 6, 7] + self.assertEqual(max_sliding_window(array, k=5), [5, 5, 6, 7]) + self.assertEqual(max_sliding_window(array, k=3), [3, 3, 5, 5, 6, 7]) + self.assertEqual(max_sliding_window(array, k=7), [6, 7]) + + array = [8, 5, 10, 7, 9, 4, 15, 12, 90, 13] + self.assertEqual(max_sliding_window(array, k=4), [10, 10, 10, 15, 15, 90, 90]) + self.assertEqual(max_sliding_window(array, k=7), [15, 15, 90, 90]) + self.assertEqual(max_sliding_window(array, k=2), [8, 10, 10, 9, 9, 15, 15, 90, 90]) + + def test_reconstruct_queue(self): + self.assertEqual([[5,0], [7,0], [5,2], [6,1], [4,4], [7,1]], + reconstruct_queue([[7,0], [4,4], [7,1], [5,0], [6,1], [5,2]])) + +if __name__ == "__main__": + + unittest.main() From 48c1768d2f174c9a28042a439bc4a619adc58f0c Mon Sep 17 00:00:00 2001 From: Kurtis Date: Mon, 30 Apr 2018 13:53:07 -0500 Subject: [PATCH 268/387] typo fix (#269) --- matrix/matrix_rotation.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/matrix/matrix_rotation.txt b/matrix/matrix_rotation.txt index c25eb201b..9ce876e6a 100644 --- a/matrix/matrix_rotation.txt +++ b/matrix/matrix_rotation.txt @@ -260,7 +260,7 @@ We’ll call this our ‘layer loop’. # 5x5 matrix matrix = [ [0,1,2,3,4], - [5,6,6,8,9], + [5,6,7,8,9], [10,11,12,13,14], [15,16,17,18,19], [20,21,22,23,24] From d82eb49d8aa2e2c9815bd484bc4c741df0a2d5b7 Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Tue, 1 May 2018 15:30:27 -0700 Subject: [PATCH 269/387] Python packaging locally (#268) * Python packaging locally * Add check install and uninstall package to Travis --- .gitignore | 5 +++++ .travis.yml | 4 ++++ README.md | 21 +++++++++++++++++++++ maths/__init__.py | 0 setup.py | 16 ++++++++++++++++ 5 files changed, 46 insertions(+) create mode 100644 maths/__init__.py create mode 100644 setup.py diff --git a/.gitignore b/.gitignore index 2edbd24cc..59f26a4b5 100755 --- a/.gitignore +++ b/.gitignore @@ -4,3 +4,8 @@ __pycache__/ .cache/ .pytest_cache/ .coverage +# Setuptools distribution folder. +/dist/ +# Python egg metadata, regenerated from source files by setuptools. +/*.egg-info +/*.egg diff --git a/.travis.yml b/.travis.yml index dd56f3539..b3be12855 100644 --- a/.travis.yml +++ b/.travis.yml @@ -21,12 +21,16 @@ before_script: # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide - flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics script: + # Check python install package + - pip3 install -e . # Check unittest running - python3 -m unittest discover tests # Check pytest running - python3 -m pytest tests # Run nose with coverage support - nosetests --with-coverage + # Check python uninstall package + - pip3 uninstall -y algorithms notifications: on_success: change on_failure: change # `always` will be the setting once code changes slow down diff --git a/README.md b/README.md index 28bde7986..8d3332ef9 100644 --- a/README.md +++ b/README.md @@ -29,6 +29,27 @@ For running all tests write down: $ python3 -m pytest tests +## Install +If you want to use the API algorithms in your code, it is as simple as: + + $ pip3 install . + +You can test by creating a python file: (Ex: use `merge_sort` in `sort`) + +```python3 +from sort import merge_sort + +if __name__ == "__main__": + my_list = [1, 8, 3, 5, 6] + my_list = merge_sort.merge_sort(my_list) + print(my_list) +``` + +## Uninstall +If you want to uninstall algorithms, it is as simple as: + + $ pip3 uninstall -y algorithms + ## List of Implementations - [array](array) diff --git a/maths/__init__.py b/maths/__init__.py new file mode 100644 index 000000000..e69de29bb diff --git a/setup.py b/setup.py new file mode 100644 index 000000000..b7374e85c --- /dev/null +++ b/setup.py @@ -0,0 +1,16 @@ +import os +from setuptools import find_packages, setup + +setup(name='algorithms', + version='1.1', + description='Pythonic Data Structures and Algorithms', + url='https://github.com/keon/algorithms', + author='Keon Kim, Hai Hoang Dang, Rahul Goswami, Christian Bender, Saad', + license='MIT', + packages=find_packages(), + classifiers=[ + 'Programming Language :: Python :: 3', + 'Programming Language :: Python :: 3.4', + 'Programming Language :: Python :: 3.5', + ], + zip_safe=False) From fbace843f6febaea28f35511035c8c997ba0fdab Mon Sep 17 00:00:00 2001 From: Sa'd Date: Wed, 2 May 2018 12:11:33 -0500 Subject: [PATCH 270/387] Add priority queue implementation using lists --- queues/priority_queue.py | 41 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 queues/priority_queue.py diff --git a/queues/priority_queue.py b/queues/priority_queue.py new file mode 100644 index 000000000..92d8c4a44 --- /dev/null +++ b/queues/priority_queue.py @@ -0,0 +1,41 @@ +""" +Implementation of priority queue +""" + +class PriorityQueueNode: + def __init__(self, data, priority): + self.data = data + self.priority = priority + + def __repr__(self): + return str(self.data) + ": " + str(self.priority) + +class PriorityQueue: + def __init__(self): + self.priority_queue_list = [] + + def size(self): + return len(self.priority_queue_list) + + def insert(self, node): + # if queue is empty + if self.size() == 0: + self.priority_queue_list.append(node) + else: + # traverse the queue to find the right place for new node + for index, current in enumerate(self.priority_queue_list): + if current.priority < node.priority: + # if we have traversed the complete queue + if index == self.size() - 1: + # add new node at the end + self.priority_queue_list.insert(index + 1, node) + else: + continue + else: + self.priority_queue_list.insert(index, node) + return True + + def delete(self): + # remove the first node from the queue + return self.priority_queue_list.pop(0) + \ No newline at end of file From 5898ae0e3450a585f3d35e23863bf5eac8cd465f Mon Sep 17 00:00:00 2001 From: danghai Date: Wed, 2 May 2018 20:04:37 -0700 Subject: [PATCH 271/387] Fix minor typo in README --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index 8d3332ef9..660369f53 100644 --- a/README.md +++ b/README.md @@ -32,7 +32,7 @@ For running all tests write down: ## Install If you want to use the API algorithms in your code, it is as simple as: - $ pip3 install . + $ pip3 install git+https://github.com/keon/algorithms You can test by creating a python file: (Ex: use `merge_sort` in `sort`) From d890b34ca2acd46da8c473c0ea09a0c4359a19d1 Mon Sep 17 00:00:00 2001 From: Agranya Singh <35340618+agranya99@users.noreply.github.com> Date: Thu, 3 May 2018 15:29:21 +0530 Subject: [PATCH 272/387] add Dijkstra's and OrderedStack (#270) * Dijkstra's single source shortest path algorithm * Update dij.py provided test case * Create orderedStack.py Stack that is always sorted in order highest to lowest. Can be applied in e-mail/messages application to display latest messages at the top. * Update and rename dij.py to dijkstra.py * Update orderedStack.py Made suggested changes * Update orderedStack.py * Modify the orderedStack and add unittest * Update dijkstra.py * Update dijkstra.py * Update dijkstra.py * Update dijkstra.py * Update dijkstra.py * Update dijkstra.py corrected indentation * Update ordered_stack.py Forgot to remove return statement from push function. I needed it in one of my programs. Removed. Removed redundant brackets * Update test_stack.py * Update test_stack.py --- graph/dijkstra.py | 36 ++++++++++++++++++++++++++++++++++++ stack/ordered_stack.py | 33 +++++++++++++++++++++++++++++++++ tests/test_stack.py | 15 +++++++++++++++ 3 files changed, 84 insertions(+) create mode 100644 graph/dijkstra.py create mode 100644 stack/ordered_stack.py diff --git a/graph/dijkstra.py b/graph/dijkstra.py new file mode 100644 index 000000000..fe5772ec5 --- /dev/null +++ b/graph/dijkstra.py @@ -0,0 +1,36 @@ +#Dijkstra's single source shortest path algorithm + +class Graph(): + + def __init__(self, vertices): + self.vertices = vertices + self.graph = [[0 for column in range(vertices)] for row in range(vertices)] + + def min_distance(self, dist, min_dist_set): + min_dist = float("inf") + for v in range(self.vertices): + if dist[v] < min_dist and min_dist_set[v] == False: + min_dist = dist[v] + min_index = v + return min_index + + def dijkstra(self, src): + + dist = [float("inf")] * self.vertices + dist[src] = 0 + min_dist_set = [False] * self.vertices + + for count in range(self.vertices): + + #minimum distance vertex that is not processed + u = self.min_distance(dist, min_dist_set) + + #put minimum distance vertex in shortest tree + min_dist_set[u] = True + + #Update dist value of the adjacent vertices + for v in range(self.vertices): + if self.graph[u][v] > 0 and min_dist_set[v] == False and dist[v] > dist[u] + self.graph[u][v]: + dist[v] = dist[u] + self.graph[u][v] + + return dist diff --git a/stack/ordered_stack.py b/stack/ordered_stack.py new file mode 100644 index 000000000..7a30d143e --- /dev/null +++ b/stack/ordered_stack.py @@ -0,0 +1,33 @@ +#The stack remains always ordered such that the highest value is at the top and the lowest at the bottom + +class OrderedStack: + def __init__(self): + self.items = [] + + def is_empty(self): + return self.items == [] + + def push_t(self, item): + self.items.append(item) + + def push(self, item): #push method to maintain order when pushing new elements + temp_stack = OrderedStack() + if self.is_empty() or item > self.peek(): + self.push_t(item) + else: + while item < self.peek() and not self.is_empty(): + temp_stack.push_t(self.pop()) + self.push_t(item) + while not temp_stack.is_empty(): + self.push_t(temp_stack.pop()) + + def pop(self): + if self.is_empty(): + raise IndexError("Stack is empty") + return self.items.pop() + + def peek(self): + return self.items[len(self.items) - 1] + + def size(self): + return len(self.items) diff --git a/tests/test_stack.py b/tests/test_stack.py index 3b55ac90f..e3b85d414 100644 --- a/tests/test_stack.py +++ b/tests/test_stack.py @@ -6,6 +6,7 @@ from stack.valid_parenthesis import is_valid from stack.simplify_path import simplify_path from stack.stack import ArrayStack, LinkedListStack +from stack.ordered_stack import OrderedStack import unittest class TestSuite(unittest.TestCase): @@ -129,5 +130,19 @@ def test_LinkedListStack(self): self.assertTrue(stack.is_empty()) +class TestOrderedStack(unittest.TestCase): + def test_OrderedStack(self): + stack = OrderedStack() + self.assertTrue(stack.is_empty()) + stack.push(1) + stack.push(4) + stack.push(3) + stack.push(6) + "bottom - > 1 3 4 6 " + self.assertEqual(6, stack.pop()) + self.assertEqual(4, stack.peek()) + self.assertEqual(3, stack.size()) + + if __name__ == "__main__": unittest.main() From 4741df44b4bed57d0e7326c33a3dec52a4c50183 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Thu, 3 May 2018 21:55:49 +0530 Subject: [PATCH 273/387] Update priority_queue.py (#273) * Update priority_queue.py - refactor `insert` and `delete` -> `push` and `pop`. Because `pop` seems more natural while returning the deleted item (rather than `delete`) - `push` now takes data and priority(optional), and constructs a `PriorityQueueNode` inside the method for inserting. This simplifies the usage. - used `collections.deque()` for O(1) popleft operation. - add `__repr__` method. * Add unittest for PriorityQueue --- queues/priority_queue.py | 48 +++++++++++++++++++--------------------- tests/test_queues.py | 15 ++++++++++++- 2 files changed, 37 insertions(+), 26 deletions(-) diff --git a/queues/priority_queue.py b/queues/priority_queue.py index 92d8c4a44..a28ae9697 100644 --- a/queues/priority_queue.py +++ b/queues/priority_queue.py @@ -1,8 +1,12 @@ """ -Implementation of priority queue +Implementation of priority queue using linear array. +Insertion - O(n) +Extract min/max Node - O(1) """ +import collections -class PriorityQueueNode: + +class PriorityQueueNode: def __init__(self, data, priority): self.data = data self.priority = priority @@ -12,30 +16,24 @@ def __repr__(self): class PriorityQueue: def __init__(self): - self.priority_queue_list = [] + self.priority_queue_list = collections.deque() + + def __repr__(self): + return "PriorityQueue({!r})".format(list(self.priority_queue_list)) def size(self): return len(self.priority_queue_list) - def insert(self, node): - # if queue is empty - if self.size() == 0: - self.priority_queue_list.append(node) - else: - # traverse the queue to find the right place for new node - for index, current in enumerate(self.priority_queue_list): - if current.priority < node.priority: - # if we have traversed the complete queue - if index == self.size() - 1: - # add new node at the end - self.priority_queue_list.insert(index + 1, node) - else: - continue - else: - self.priority_queue_list.insert(index, node) - return True - - def delete(self): - # remove the first node from the queue - return self.priority_queue_list.pop(0) - \ No newline at end of file + def push(self, item, priority=None): + priority = item if priority is None else priority + node = PriorityQueueNode(item, priority) + for index, current in enumerate(self.priority_queue_list): + if current.priority > node.priority: + self.priority_queue_list.insert(index, node) + return + # when traversed complete queue + self.priority_queue_list.append(node) + + def pop(self): + # remove and return the first node from the queue + return self.priority_queue_list.popleft() diff --git a/tests/test_queues.py b/tests/test_queues.py index 23afc29a4..a37d95f43 100644 --- a/tests/test_queues.py +++ b/tests/test_queues.py @@ -1,7 +1,7 @@ from queues.queue import ArrayQueue, LinkedListQueue from queues.max_sliding_window import max_sliding_window from queues.reconstruct_queue import reconstruct_queue - +from queues.priority_queue import PriorityQueue, PriorityQueueNode import unittest class TestQueue(unittest.TestCase): @@ -85,6 +85,19 @@ def test_reconstruct_queue(self): self.assertEqual([[5,0], [7,0], [5,2], [6,1], [4,4], [7,1]], reconstruct_queue([[7,0], [4,4], [7,1], [5,0], [6,1], [5,2]])) +class TestPriorityQueue(unittest.TestCase): + """ + Test suite for the PriorityQueue data structures. + """ + def test_PriorityQueue(self): + queue = PriorityQueue() + queue.push(3) + queue.push(4) + queue.push(1) + queue.push(6) + self.assertEqual(4,queue.size()) + self.assertEqual(str(1) + ": " + str(1),str(queue.pop())) + if __name__ == "__main__": unittest.main() From e2e9fac5c3919522120a582e146e24603603c837 Mon Sep 17 00:00:00 2001 From: sunwen <1416316137@qq.com> Date: Fri, 4 May 2018 20:31:41 +0800 Subject: [PATCH 274/387] update readme for chinese students (#276) * update readme * update .gitgnore * Update README_CN.md * Update README_CN.md * Update README.md --- .gitignore | 2 + README.md | 28 +++++++------- README_CN.md | 101 +++++++++++++++++++++++++++++++++++++++++++-------- 3 files changed, 102 insertions(+), 29 deletions(-) diff --git a/.gitignore b/.gitignore index 59f26a4b5..86f7f584d 100755 --- a/.gitignore +++ b/.gitignore @@ -1,5 +1,7 @@ __pycache__/ *.py[cod] +*.iml +*.xml .idea/ .cache/ .pytest_cache/ diff --git a/README.md b/README.md index 660369f53..f4f3185de 100644 --- a/README.md +++ b/README.md @@ -52,20 +52,20 @@ If you want to uninstall algorithms, it is as simple as: ## List of Implementations -- [array](array) - - [delete_nth](array/delete_nth.py) - - [flatten](array/flatten.py) - - [garage](array/garage.py) - - [josephus_problem](array/josephus_problem.py) - - [longest_non_repeat](array/longest_non_repeat.py/) - - [merge_intervals](array/merge_intervals.py) - - [missing_ranges](array/missing_ranges.py) - - [plus_one](array/plus_one.py) - - [rotate_array](array/rotate_array.py) - - [summary_ranges](array/summary_ranges.py) - - [three_sum](array/three_sum.py) - - [two_sum](array/two_sum.py) - - [move_zeros_to_end](array/move_zeros_to_end.py) +- [arrays](arrays) + - [delete_nth](arrays/delete_nth.py) + - [flatten](arrays/flatten.py) + - [garage](arrays/garage.py) + - [josephus_problem](arrays/josephus_problem.py) + - [longest_non_repeat](arrays/longest_non_repeat.py/) + - [merge_intervals](arrays/merge_intervals.py) + - [missing_ranges](arrays/missing_ranges.py) + - [plus_one](arrays/plus_one.py) +    - [rotate_array](arrays/rotate_array.py) + - [summary_ranges](arrays/summary_ranges.py) + - [three_sum](arrays/three_sum.py) + - [two_sum](arrays/two_sum.py) + - [move_zeros_to_end](arrays/move_zeros_to_end.py) - [backtrack](backtrack) - [general_solution.md](backtrack/) - [anagram](backtrack/anagram.py) diff --git a/README_CN.md b/README_CN.md index 08edaf258..c612cd522 100644 --- a/README_CN.md +++ b/README_CN.md @@ -3,23 +3,82 @@ Python版数据结构和算法 ========================================= -python版数据结构和算法实现的简约版小示例 +python版数据结构和算法实现的简约版小示例 +谢谢关注。有多种方法可以贡献你的代码。[从这里开始吧](https://github.com/keon/algorithms/blob/master/CONTRIBUTING.md) + +[或者可以用不同语言来完成上述算法，期待加入](https://github.com/yunshuipiao/sw-algorithms)：https://github.com/yunshuipiao/sw-algorithms + +## 测试 + +### 单元测试 +如下代码可以运行全部测试： +``` + +python3 -m unittest discover tests + +``` + +针对特定模块(比如：sort)的测试， 可以使用如下代码： +``` + +python3 -m unittest tests.test_sort + +``` + +### 使用pytest +如下代码运行所有测试代码： +``` + +pyhton3 -m pytest tests + +``` + +## 安装 +如果想在代码中使用算法API， 可按如下步骤进行： +``` + +pip3 install git+https://github.com/keon/algorithms + +``` + +通过创建python文件(比如：在sort模块使用merge_sort)进行测试： +``` + +from sort import merge_sort + +if __name__ == "__main__": + my_list = [1, 8, 3, 5, 6] + my_list = merge_sort.merge_sort(my_list) + print(my_list) + +``` + +## 卸载 +如下代码可卸载该API： + +``` + +pip3 uninstall -y algorithms + +``` ## 实现列表 -- [array:数组](array) - - [circular_counter：约瑟夫环](array/josephus_problem.py) - - [flatten：数组降维](array/flatten.py) - - [garage：停车场](array/garage.py) - - [longest_non_repeat：最长不重复子串](array/longest_non_repeat.py/) - - [merge_intervals：合并重叠间隔](array/merge_intervals.py) - - [missing_ranges：遗失的范围](array/missing_ranges.py) - - [plus_one：加一运算](array/plus_one.py) - - [rotate_array：反转数组](array/rotate_array.py) - - [summary_ranges：数组范围](array/summary_ranges.py) - - [three_sum：三数和为零](array/three_sum.py) - - [two_sum：两数和](array/two_sum.py) +- [array:数组](arrays) + - [delete_nth: 删除第n项](arrays/delete_nth.py) + - [flatten：数组降维](arrays/flatten.py) + - [garage：停车场](arrays/garage.py) + - [josephus_problem: 约瑟夫问题](arrays/josephus_problem.py) + - [longest_non_repeat：最长不重复子串](arrays/longest_non_repeat.py/) + - [merge_intervals：合并重叠间隔](arrays/merge_intervals.py) + - [missing_ranges：遗失的范围](arrays/missing_ranges.py) + - [plus_one：加一运算](arrays/plus_one.py) + - [rotate_array：反转数组](arrays/rotate_array.py) + - [summary_ranges：数组范围](arrays/summary_ranges.py) + - [three_sum：三数和为零](arrays/three_sum.py) + - [two_sum：两数和](arrays/two_sum.py) + - [move_zeros_to_end: 0后置问题](arrays/move_zeros_to_end.py) - [backtrack：回溯](backtrack) - [general_solution.md：一般方法](backtrack/) - [anagram：同字母异序词](backtrack/anagram.py) @@ -28,7 +87,7 @@ python版数据结构和算法实现的简约版小示例 - [expression_add_operators：给表达式添加运算符](backtrack/expression_add_operators.py) - [factor_combinations：因素组合](backtrack/factor_combinations.py) - [generate_abbreviations：缩写生成](backtrack/generate_abbreviations.py) - - [generate_parenthesis：插入生成](backtrack/generate_parenthesis.py) + - [generate_parenthesis：括号生成](backtrack/generate_parenthesis.py) - [letter_combination：字母组合](backtrack/letter_combination.py) - [palindrome_partitioning：字符串的所有回文子串](backtrack/palindrome_partitioning.py) - [pattern_match：模式匹配](backtrack/pattern_match.py) @@ -212,5 +271,17 @@ python版数据结构和算法实现的简约版小示例 - [trie：字典](tree/trie/trie.py) - [union-find：并查集](union-find) - [count_islands：岛计数](union-find/count_islands.py) -- [或者可以用不同语言来完成上述算法，期待加入](https://github.com/yunshuipiao/sw-algorithms) + + +## 贡献 +谢谢主要维护人员： + +* [Keon Kim](https://github.com/keon) +* [Rahul Goswami](https://github.com/goswami-rahul) +* [Christian Bender](https://github.com/christianbender) +* [Ankit Agarwal](https://github.com/ankit167) +* [Hai Hoang Dang](https://github.com/danghai) +* [Saad](https://github.com/SaadBenn) + +以及[所有贡献者](https://github.com/keon/algorithms/graphs/contributors) From 31c9781a67a24b419024933d209c374516da97c9 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Fri, 4 May 2018 17:41:34 +0200 Subject: [PATCH 275/387] added a iterative version --- dp/fib.py | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/dp/fib.py b/dp/fib.py index f1658d7d1..93dce75f2 100644 --- a/dp/fib.py +++ b/dp/fib.py @@ -43,3 +43,28 @@ def fib_list(n): return list_results[n] # print(fib_list(100)) # => 354224848179261915075 + +def fib_iter(n): + """[summary] + Works iterative approximate O(n) + + Arguments: + n {[type]} -- [description] + + Returns: + [type] -- [description] + """ + + fib_1 = 0 + fib_2 = 1 + sum = 0 + if n <= 1: + return n + for i in range(n-1): + sum = fib_1 + fib_2 + fib_1 = fib_2 + fib_2 = sum + return sum + +# => 354224848179261915075 +# print(fib_iter(100)) \ No newline at end of file From 390805e8d07b3fad28cdae33fcdc395dd64b7fad Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Fri, 4 May 2018 17:42:56 +0200 Subject: [PATCH 276/387] changed the README.md --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index 9635856b8..1e26a7c67 100644 --- a/README.md +++ b/README.md @@ -99,6 +99,7 @@ For running all tests write down: - [regex_matching](dp/regex_matching.py) - [rod_cut](dp/rod_cut.py) - [word_break](dp/word_break.py) + - [fibonacci](dp/fib.py) - [graph](graph) - [strongly_connected](graph/checkDiGraphStronglyConnected.py) - [clone_graph](graph/clone_graph.py) From 31be897692d6fb072ff71564de301c6dde521c76 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Fri, 4 May 2018 17:45:22 +0200 Subject: [PATCH 277/387] added a precondition with assert --- dp/fib.py | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/dp/fib.py b/dp/fib.py index 93dce75f2..3ba4c5e3a 100644 --- a/dp/fib.py +++ b/dp/fib.py @@ -49,12 +49,15 @@ def fib_iter(n): Works iterative approximate O(n) Arguments: - n {[type]} -- [description] + n {[int]} -- [description] Returns: - [type] -- [description] + [int] -- [description] """ + # precondition + assert n >= 0, 'n must be positive integer' + fib_1 = 0 fib_2 = 1 sum = 0 From ad22f7e3d7f2bb7b07e5d56aa2d699c4a34c63b6 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Fri, 11 May 2018 23:39:08 +0200 Subject: [PATCH 278/387] added a german redame and changed the main-readme --- README.md | 2 +- README_GE.md | 329 +++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 330 insertions(+), 1 deletion(-) create mode 100644 README_GE.md diff --git a/README.md b/README.md index d5cc0e3b5..fce6c05a3 100644 --- a/README.md +++ b/README.md @@ -1,4 +1,4 @@ -English | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) +English | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) | [Deutsch](README_GE.md) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) [![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) diff --git a/README_GE.md b/README_GE.md new file mode 100644 index 000000000..45938b625 --- /dev/null +++ b/README_GE.md @@ -0,0 +1,329 @@ +[English](README.md) | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) | Deutsch + +[![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) +[![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) +[![Coverage Status](https://coveralls.io/repos/github/keon/algorithms/badge.svg?branch=master)](https://coveralls.io/github/keon/algorithms?branch=master) + +Pythonic Data Structures and Algorithms +========================================= + +In diesem Repository finden Sie eine große Auswahl an Algorithmen und Datenstrukturen implementiert in Python 3. + +## Beteiligen + +Sie können sich gerne auch an diesem Projekt beteiligen. Zum Beispiel selbst Algorithmen und Datenstrukturen beisteuern, oder bereits bestehende Implementierungen verbessern, oder auch dokumentieren. Fühlen Sie sich frei und machen Sie einen Pull-Request. Alternativ können Sie auch den Issue-Tracker benutzen um auf Probleme (Bugs) in bereits bestehenden Implementierungen hinzuweisen. + +In diesem Projekt halten wir uns an die [PEP8](https://www.python.org/dev/peps/pep-0008/) Codestyle Konventionen. + +## Tests + +### Benutzen der Unittests + +Um alle Tests laufen zu lassen, tippen Sie die unten stehende Befehlzeile in die Kommandozeile: + + $ python3 -m unittest discover tests + +Um einen besonderen Test laufen zu lassen, tippen Sie folgendes: + + $ python3 -m unittest tests.test_sort + +### Benutzen von pytest + +Zum ausführen aller Tests: + + $ python3 -m pytest tests + +## Install + +Wenn Sie das Projekt installieren wollen, um es als Module in Ihren Projekten nutzen zu können. Dann tippen Sie unten stehende Befehlzeile in die Kommandozeile: + + $ pip3 install git+https://github.com/keon/algorithms + +Sie können die Installation testen in dem Sie unten stehenden Code in eine Datei packen und ausführen. + +```python3 +from sort import merge_sort + +if __name__ == "__main__": + my_list = [1, 8, 3, 5, 6] + my_list = merge_sort.merge_sort(my_list) + print(my_list) +``` + +## Uninstall + +Um das Projekt zu deinstallieren tippen Sie folgendes: + + $ pip3 uninstall -y algorithms + + +## Liste von Implementierungen + +- [arrays](arrays) + - [delete_nth](arrays/delete_nth.py) + - [flatten](arrays/flatten.py) + - [garage](arrays/garage.py) + - [josephus_problem](arrays/josephus_problem.py) + - [longest_non_repeat](arrays/longest_non_repeat.py/) + - [merge_intervals](arrays/merge_intervals.py) + - [missing_ranges](arrays/missing_ranges.py) + - [plus_one](arrays/plus_one.py) +    - [rotate_array](arrays/rotate_array.py) + - [summary_ranges](arrays/summary_ranges.py) + - [three_sum](arrays/three_sum.py) + - [two_sum](arrays/two_sum.py) + - [move_zeros_to_end](arrays/move_zeros_to_end.py) +- [backtrack](backtrack) + - [general_solution.md](backtrack/) + - [anagram](backtrack/anagram.py) + - [array_sum_combinations](backtrack/array_sum_combinations.py) + - [combination_sum](backtrack/combination_sum.py) + - [expression_add_operators](backtrack/expression_add_operators.py) + - [factor_combinations](backtrack/factor_combinations.py) + - [generate_abbreviations](backtrack/generate_abbreviations.py) + - [generate_parenthesis](backtrack/generate_parenthesis.py) + - [letter_combination](backtrack/letter_combination.py) + - [palindrome_partitioning](backtrack/palindrome_partitioning.py) + - [pattern_match](backtrack/pattern_match.py) + - [permute](backtrack/permute.py) + - [permute_unique](backtrack/permute_unique.py) + - [subsets](backtrack/subsets.py) + - [subsets_unique](backtrack/subsets_unique.py) +- [bfs](bfs) + - [shortest_distance_from_all_buildings](bfs/shortest_distance_from_all_buildings.py) + - [word_ladder](bfs/word_ladder.py) +- [bit](bit) + - [bytes_int_conversion](bit/bytes_int_conversion.py) + - [count_ones](bit/count_ones.py) + - [find_missing_number](bit/find_missing_number.py) + - [power_of_two](bit/power_of_two.py) + - [reverse_bits](bit/reverse_bits.py) + - [single_number](bit/single_number.py) + - [single_number2](bit/single_number2.py) + - [single_number3](bit/single_number3.py) + - [subsets](bit/subsets.py) + - [add_bitwise_operator](bit/add_bitwise_operator.py) + - [bit_operation](bit/bit_operation.py) + - [swap_pair](bit/swap_pair.py) + - [find_difference](bit/find_difference.py) + - [has_alternative_bit](bit/has_alternative_bit.py) + - [insert_bit](bit/insert_bit.py) + - [remove_bit](bit/remove_bit.py) +- [calculator](calculator) + - [math_parser](calculator/math_parser.py) +- [dfs](dfs) + - [all_factors](dfs/all_factors.py) + - [count_islands](dfs/count_islands.py) + - [pacific_atlantic](dfs/pacific_atlantic.py) + - [sudoku_solver](dfs/sudoku_solver.py) + - [walls_and_gates](dfs/walls_and_gates.py) +- [dp](dp) + - [buy_sell_stock](dp/buy_sell_stock.py) + - [climbing_stairs](dp/climbing_stairs.py) + - [coin_change](dp/coin_change.py) + - [combination_sum](dp/combination_sum.py) + - [egg_drop](dp/egg_drop.py) + - [house_robber](dp/house_robber.py) + - [job_scheduling](dp/job_scheduling.py) + - [knapsack](dp/knapsack.py) + - [longest_increasing](dp/longest_increasing.py) + - [matrix_chain_order](dp/matrix_chain_order.py) + - [max_product_subarray](dp/max_product_subarray.py) + - [max_subarray](dp/max_subarray.py) + - [min_cost_path](dp/min_cost_path.py) + - [num_decodings](dp/num_decodings.py) + - [regex_matching](dp/regex_matching.py) + - [rod_cut](dp/rod_cut.py) + - [word_break](dp/word_break.py) + - [fibonacci](dp/fib.py) +- [graph](graph) + - [strongly_connected](graph/checkDiGraphStronglyConnected.py) + - [clone_graph](graph/clone_graph.py) + - [cycle_detection](graph/cycle_detection.py) + - [find_all_cliques](graph/find_all_cliques.py) + - [find_path](graph/find_path.py) + - [graph](graph/graph.py) + - [markov_chain](graph/markov_chain.py) + - [minimum_spanning_tree](graph/minimum_spanning_tree.py) + - [satisfiability](graph/satisfiability.py) + - [tarjan](graph/tarjan.py) + - [traversal](graph/traversal.py) +- [heap](heap) + - [merge_sorted_k_lists](heap/merge_sorted_k_lists.py) + - [skyline](heap/skyline.py) + - [sliding_window_max](heap/sliding_window_max.py) + - [binary_heap](heap/binary_heap.py) +- [linkedlist](linkedlist) + - [add_two_numbers](linkedlist/add_two_numbers.py) + - [copy_random_pointer](linkedlist/copy_random_pointer.py) + - [delete_node](linkedlist/delete_node.py) + - [first_cyclic_node](linkedlist/first_cyclic_node.py) + - [is_cyclic](linkedlist/is_cyclic.py) + - [is_palindrome](linkedlist/is_palindrome.py) + - [kth_to_last](linkedlist/kth_to_last.py) + - [linkedlist](linkedlist/linkedlist.py) + - [remove_duplicates](linkedlist/remove_duplicates.py) + - [reverse](linkedlist/reverse.py) + - [rotate_list](linkedlist/rotate_list.py) + - [swap_in_pairs](linkedlist/swap_in_pairs.py) + - [is_sorted](linkedlist/is_sorted.py) + - [remove_range](linkedlist/remove_range.py) +- [map](map) + - [hashtable](map/hashtable.py) + - [separate_chaining_hashtable](map/separate_chaining_hashtable.py) + - [longest_common_subsequence](map/longest_common_subsequence.py) + - [randomized_set](map/randomized_set.py) + - [valid_sudoku](map/valid_sudoku.py) +- [maths](maths) + - [base_conversion](maths/base_conversion.py) + - [extended_gcd](maths/extended_gcd.py) + - [gcd/lcm](maths/gcd.py) + - [generate_strobogrammtic](maths/generate_strobogrammtic.py) + - [is_strobogrammatic](maths/is_strobogrammatic.py) + - [next_bigger](maths/next_bigger.py) + - [next_perfect_square](maths/next_perfect_square.py) + - [nth_digit](maths/nth_digit.py) + - [prime_check](maths/prime_check.py) + - [primes_sieve_of_eratosthenes](maths/primes_sieve_of_eratosthenes.py) + - [pythagoras](maths/pythagoras.py) + - [rabin_miller](maths/rabin_miller.py) + - [rsa](maths/rsa.py) + - [sqrt_precision_factor](maths/sqrt_precision_factor.py) + - [summing_digits](maths/summing_digits.py) +- [matrix](matrix) + - [sudoku_validator](matrix/sudoku_validator.py) + - [bomb_enemy](matrix/bomb_enemy.py) + - [copy_transform](matrix/copy_transform.py) + - [count_paths](matrix/count_paths.py) + - [matrix_rotation.txt](matrix/matrix_rotation.txt) + - [rotate_image](matrix/rotate_image.py) + - [search_in_sorted_matrix](matrix/search_in_sorted_matrix.py) + - [sparse_dot_vector](matrix/sparse_dot_vector.py) + - [sparse_mul](matrix/sparse_mul.py) + - [spiral_traversal](matrix/spiral_traversal.py) +- [queues](queues) + - [max_sliding_window](queues/max_sliding_window.py) + - [moving_average](queues/moving_average.py) + - [queue](queues/queue.py) + - [reconstruct_queue](queues/reconstruct_queue.py) + - [zigzagiterator](queues/zigzagiterator.py) +- [search](search) + - [binary_search](search/binary_search.py) + - [first_occurance](search/first_occurance.py) + - [last_occurance](search/last_occurance.py) + - [search_insert](search/search_insert.py) + - [two_sum](search/two_sum.py) + - [search_range](search/search_range.py) + - [find_min_rotate](search/find_min_rotate.py) + - [search_rotate](search/search_rotate.py) +- [set](set) + - [randomized_set](set/randomized_set.py) + - [set_covering](set/set_covering.py) +- [sort](sort) + - [bubble_sort](sort/bubble_sort.py) + - [comb_sort](sort/comb_sort.py) + - [counting_sort](sort/counting_sort.py) + - [heap_sort](sort/heap_sort.py) + - [insertion_sort](sort/insertion_sort.py) + - [meeting_rooms](sort/meeting_rooms.py) + - [merge_sort](sort/merge_sort.py) + - [quick_sort](sort/quick_sort.py) + - [selection_sort](sort/selection_sort.py) + - [sort_colors](sort/sort_colors.py) + - [topsort](sort/topsort.py) + - [wiggle_sort](sort/wiggle_sort.py) +- [stack](stack) + - [longest_abs_path](stack/longest_abs_path.py) + - [simplify_path](stack/simplify_path.py) + - [stack](stack/stack.py) + - [valid_parenthesis](stack/valid_parenthesis.py) + - [stutter](stack/stutter.py) + - [switch_pairs](stack/switch_pairs.py) + - [is_consecutive](stack/is_consecutive.py) + - [remove_min](stack/remove_min.py) + - [is_sorted](stack/is_sorted.py) +- [strings](strings) + - [fizzbuzz](strings/fizzbuzz.py) + - [delete_reoccurring_characters](strings/delete_reoccurring_characters.py) + - [strip_url_params](strings/strip_url_params.py) + - [validate_coordinates](strings/validate_coordinates.py) + - [domain_extractor](strings/domain_extractor.py) + - [merge_string_checker](strings/merge_string_checker.py) + - [add_binary](strings/add_binary.py) + - [breaking_bad](strings/breaking_bad.py) + - [decode_string](strings/decode_string.py) + - [encode_decode](strings/encode_decode.py) + - [group_anagrams](strings/group_anagrams.py) + - [int_to_roman](strings/int_to_roman.py) + - [is_palindrome](strings/is_palindrome.py) + - [license_number](strings/license_number.py) + - [make_sentence](strings/make_sentence.py) + - [multiply_strings](strings/multiply_strings.py) + - [one_edit_distance](strings/one_edit_distance.py) + - [rabin_karp](strings/rabin_karp.py) + - [reverse_string](strings/reverse_string.py) + - [reverse_vowel](strings/reverse_vowel.py) + - [reverse_words](strings/reverse_words.py) + - [roman_to_int](strings/roman_to_int.py) + - [word_squares](strings/word_squares.py) +- [tree](tree) + - [bst](tree/tree/bst) + - [array2bst](tree/bst/array2bst.py) + - [bst_closest_value](tree/bst/bst_closest_value.py) + - [BSTIterator](tree/bst/BSTIterator.py) + - [delete_node](tree/bst/delete_node.py) + - [is_bst](tree/bst/is_bst.py) + - [kth_smallest](tree/bst/kth_smallest.py) + - [lowest_common_ancestor](tree/bst/lowest_common_ancestor.py) + - [predecessor](tree/bst/predecessor.py) + - [serialize_deserialize](tree/bst/serialize_deserialize.py) + - [successor](tree/bst/successor.py) + - [unique_bst](tree/bst/unique_bst.py) + - [depth_sum](tree/bst/depth_sum.py) + - [count_left_node](tree/bst/count_left_node.py) + - [num_empty](tree/bst/num_empty.py) + - [height](tree/bst/height.py) + - [red_black_tree](tree/red_black_tree) + - [red_black_tree](tree/red_black_tree/red_black_tree.py) + - [segment_tree](tree/segment_tree) + - [segment_tree](tree/segment_tree/segment_tree.py) + - [traversal](tree/traversal) + - [inorder](tree/traversal/inorder.py) + - [level_order](tree/traversal/level_order.py) + - [zigzag](tree/traversal/zigzag.py) + - [trie](tree/trie) + - [add_and_search](tree/trie/add_and_search.py) + - [trie](tree/trie/trie.py) + - [binary_tree_paths](tree/binary_tree_paths.py) + - [bintree2list](tree/bintree2list.py) + - [deepest_left](tree/deepest_left.py) + - [invert_tree](tree/invert_tree.py) + - [is_balanced](tree/is_balanced.py) + - [is_subtree](tree/is_subtree.py) + - [is_symmetric](tree/is_symmetric.py) + - [longest_consecutive](tree/longest_consecutive.py) + - [lowest_common_ancestor](tree/lowest_common_ancestor.py) + - [max_height](tree/max_height.py) + - [max_path_sum](tree/max_path_sum.py) + - [min_height](tree/min_height.py) + - [path_sum](tree/path_sum.py) + - [path_sum2](tree/path_sum2.py) + - [pretty_print](tree/pretty_print.py) + - [same_tree](tree/same_tree.py) + - [tree](tree/tree.py) +- [union-find](union-find) + - [count_islands](union-find/count_islands.py) + +## Contributors + +Das Projekt wird von folgenden Personen betreut. + +* [Keon Kim](https://github.com/keon) +* [Rahul Goswami](https://github.com/goswami-rahul) +* [Christian Bender](https://github.com/christianbender) +* [Ankit Agarwal](https://github.com/ankit167) +* [Hai Hoang Dang](https://github.com/danghai) +* [Saad](https://github.com/SaadBenn) + +Und danke an alle [Contributors](https://github.com/keon/algorithms/graphs/contributors) +die geholfen haben das Projekt aufzubauen! From d60b4593fcc540f3df8a075e1bdf040316401e94 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Fri, 11 May 2018 23:43:31 +0200 Subject: [PATCH 279/387] changed something --- README_GE.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/README_GE.md b/README_GE.md index 45938b625..af1b8b2c4 100644 --- a/README_GE.md +++ b/README_GE.md @@ -4,7 +4,7 @@ [![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) [![Coverage Status](https://coveralls.io/repos/github/keon/algorithms/badge.svg?branch=master)](https://coveralls.io/github/keon/algorithms?branch=master) -Pythonic Data Structures and Algorithms +Pythonische Datenstrukturen und Algorithmen ========================================= In diesem Repository finden Sie eine große Auswahl an Algorithmen und Datenstrukturen implementiert in Python 3. @@ -314,7 +314,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [union-find](union-find) - [count_islands](union-find/count_islands.py) -## Contributors +## Mitwirkende Das Projekt wird von folgenden Personen betreut. From 3fe1ae2a6750d3697ff63b648aaf525832887f56 Mon Sep 17 00:00:00 2001 From: Victor Encarnacion Date: Wed, 16 May 2018 22:37:54 -0700 Subject: [PATCH 280/387] Add is_rotated.py (#281) * Add tests for is_rotated * Add is_rotated.py * Conforms to PEP8 * Add empty string test to is_rotated --- strings/is_rotated.py | 15 +++++++++++++++ tests/test_strings.py | 17 +++++++++++++++++ 2 files changed, 32 insertions(+) create mode 100644 strings/is_rotated.py diff --git a/strings/is_rotated.py b/strings/is_rotated.py new file mode 100644 index 000000000..a68d62d04 --- /dev/null +++ b/strings/is_rotated.py @@ -0,0 +1,15 @@ +""" +Given two strings s1 and s2, determine if s2 is a rotated version of s1. +For example, +is_rotated("hello", "llohe") returns True +is_rotated("hello", "helol") returns False + +accepts two strings +returns bool +""" + +def is_rotated(s1, s2): + if len(s1) == len(s2): + return s2 in s1 + s1 + else: + return False \ No newline at end of file diff --git a/tests/test_strings.py b/tests/test_strings.py index 8cee75bcf..c0aa28334 100644 --- a/tests/test_strings.py +++ b/tests/test_strings.py @@ -8,6 +8,7 @@ from strings.int_to_roman import int_to_roman from strings.is_palindrome import is_palindrome, is_palindrome_reverse, \ is_palindrome_two_pointer, is_palindrome_stack +from strings.is_rotated import is_rotated from strings.license_number import license_number from strings.make_sentence import make_sentence from strings.merge_string_checker import is_merge_recursive, is_merge_iterative @@ -165,6 +166,22 @@ def test_is_palindrome_stack(self): self.assertFalse(is_palindrome_stack("house")) +class TestIsRotated(unittest.TestCase): + """[summary] + Test for the file is_rotated.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_is_rotated(self): + self.assertTrue(is_rotated("hello", "hello")) + self.assertTrue(is_rotated("hello", "llohe")) + self.assertFalse(is_rotated("hello", "helol")) + self.assertFalse(is_rotated("hello", "lloh")) + self.assertTrue(is_rotated("", "")) + + class TestLicenseNumber(unittest.TestCase): """[summary] Test for the file license_number.py From e84c34422a0956a7fcc9d0fe4bb48b0a1c57878c Mon Sep 17 00:00:00 2001 From: Michael Galarnyk Date: Thu, 17 May 2018 12:02:25 -0700 Subject: [PATCH 281/387] Updated summing_digits to not override a built-in python function (#283) --- maths/summing_digits.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/maths/summing_digits.py b/maths/summing_digits.py index 3f4e21a32..f181a92eb 100644 --- a/maths/summing_digits.py +++ b/maths/summing_digits.py @@ -14,16 +14,16 @@ def sum_dig_pow(a, b): for number in range(a, b + 1): exponent = 1 # set to 1 - sum = 0 # set to 1 + summation = 0 # set to 1 number_as_string = str(number) tokens = list(map(int, number_as_string)) # parse the string into individual digits for k in tokens: - sum = sum + (k ** exponent) + summation = summation + (k ** exponent) exponent += 1 - if sum == number: + if summation == number: result.append(number) return result From 05e38dcf714b5a50844bf45d4d25e4505ca2a6f4 Mon Sep 17 00:00:00 2001 From: Roger Li Date: Wed, 23 May 2018 01:54:58 -0400 Subject: [PATCH 282/387] Update bst.py (#284) --- tree/bst/bst.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/tree/bst/bst.py b/tree/bst/bst.py index 223b6b722..de1bddd8c 100644 --- a/tree/bst/bst.py +++ b/tree/bst/bst.py @@ -89,14 +89,14 @@ def preorder(self, root): def inorder(self, root): if root: - self.preorder(root.left) + self.inorder(root.left) print(str(root.data), end = ' ') - self.preorder(root.right) + self.inorder(root.right) def postorder(self, root): if root: - self.preorder(root.left) - self.preorder(root.right) + self.postorder(root.left) + self.postorder(root.right) print(str(root.data), end = ' ') """ From 194500a8963a8528c6eef2637c6edf2b49dda797 Mon Sep 17 00:00:00 2001 From: kangsir Date: Fri, 25 May 2018 00:23:21 +0800 Subject: [PATCH 283/387] update quicksort (#285) * add doc string * when input array type is np.array, output array type is the same rather than list * wrap the sorting function * modified the code according to the pep8 specification * use // instead of int() * add extra 2 argument to pass test * delete two arguments of quick sort and reformat test_sort.py * fix a small bug in quick_sort --- sort/bubble_sort.py | 3 +- sort/comb_sort.py | 4 +-- sort/counting_sort.py | 58 +++++++++++++++++----------------- sort/heap_sort.py | 40 +++++++++++------------ sort/insertion_sort.py | 6 ++-- sort/meeting_rooms.py | 2 +- sort/merge_sort.py | 38 +++++++++++----------- sort/quick_sort.py | 16 +++++++--- sort/selection_sort.py | 2 +- sort/sort_colors.py | 2 +- sort/topsort.py | 18 ++++++----- sort/wiggle_sort.py | 4 ++- tests/test_sort.py | 72 ++++++++++++++++++++++-------------------- 13 files changed, 138 insertions(+), 127 deletions(-) diff --git a/sort/bubble_sort.py b/sort/bubble_sort.py index da9cebdf1..0a8a47063 100644 --- a/sort/bubble_sort.py +++ b/sort/bubble_sort.py @@ -5,8 +5,9 @@ Worst-case performance: O(N^2) """ -def bubble_sort(arr): + +def bubble_sort(arr): def swap(i, j): arr[i], arr[j] = arr[j], arr[i] diff --git a/sort/comb_sort.py b/sort/comb_sort.py index 338771d2b..efa58fc5e 100644 --- a/sort/comb_sort.py +++ b/sort/comb_sort.py @@ -5,11 +5,9 @@ Worst-case performance: O(N^2) """ -from math import floor def comb_sort(arr): - def swap(i, j): arr[i], arr[j] = arr[j], arr[i] @@ -18,7 +16,7 @@ def swap(i, j): shrink = 1.3 sorted = False while not sorted: - gap = int(floor(gap/shrink)) + gap = int(gap / shrink) if gap > 1: sorted = False else: diff --git a/sort/counting_sort.py b/sort/counting_sort.py index 9b11af3cc..46688e218 100644 --- a/sort/counting_sort.py +++ b/sort/counting_sort.py @@ -1,36 +1,36 @@ def counting_sort(arr): - """ + """ Counting_sort - Sorting a array which has no element greater than k - Creating a new temp_arr,where temp_arr[i] contain the number of - element less than or equal to i in the arr + Sorting a array which has no element greater than k + Creating a new temp_arr,where temp_arr[i] contain the number of + element less than or equal to i in the arr Then placing the number i into a correct position in the result_arr - return the result_arr - Complexity: 0(n) - """ + return the result_arr + Complexity: 0(n) + """ - m = min(arr) - #in case there are negative elements, change the array to all positive element - different = 0 - if m < 0: - #save the change, so that we can convert the array back to all positive number - different = -m - for i in range (len(arr)): - arr[i]+= -m - k = max(arr) - temp_arr = [0]*(k+1) - for i in range(0,len(arr)): - temp_arr[arr[i]] = temp_arr[arr[i]]+1 - #temp_array[i] contain the times the number i appear in arr + m = min(arr) + # in case there are negative elements, change the array to all positive element + different = 0 + if m < 0: + # save the change, so that we can convert the array back to all positive number + different = -m + for i in range(len(arr)): + arr[i] += -m + k = max(arr) + temp_arr = [0] * (k + 1) + for i in range(0, len(arr)): + temp_arr[arr[i]] = temp_arr[arr[i]] + 1 + # temp_array[i] contain the times the number i appear in arr - for i in range(1, k+1): - temp_arr[i] = temp_arr[i] + temp_arr[i-1] - #temp_array[i] contain the number of element less than or equal i in arr + for i in range(1, k + 1): + temp_arr[i] = temp_arr[i] + temp_arr[i - 1] + # temp_array[i] contain the number of element less than or equal i in arr - result_arr = [0]*len(arr) - #creating a result_arr an put the element in a correct positon - for i in range(len(arr)-1,-1,-1): - result_arr[temp_arr[arr[i]]-1] = arr[i]-different - temp_arr[arr[i]] = temp_arr[arr[i]]-1 + result_arr = arr.copy() + # creating a result_arr an put the element in a correct positon + for i in range(len(arr) - 1, -1, -1): + result_arr[temp_arr[arr[i]] - 1] = arr[i] - different + temp_arr[arr[i]] = temp_arr[arr[i]] - 1 - return result_arr + return result_arr diff --git a/sort/heap_sort.py b/sort/heap_sort.py index 5cdc78665..6c91cee90 100644 --- a/sort/heap_sort.py +++ b/sort/heap_sort.py @@ -2,7 +2,7 @@ def max_heap_sort(arr): """ Heap Sort that uses a max heap to sort an array in ascending order Complexity: O(n log(n)) """ - for i in range(len(arr)-1,0,-1): + for i in range(len(arr) - 1, 0, -1): max_heapify(arr, i) temp = arr[0] @@ -10,28 +10,26 @@ def max_heap_sort(arr): arr[i] = temp return arr + def max_heapify(arr, end): """ Max heapify helper for max_heap_sort """ - last_parent = int((end-1)/2) + last_parent = (end - 1) // 2 # Iterate from last parent to first - for parent in range(last_parent,-1,-1): + for parent in range(last_parent, -1, -1): current_parent = parent # Iterate from current_parent to last_parent while current_parent <= last_parent: # Find greatest child of current_parent - child = 2*current_parent + 1 - if child + 1 <= end and arr[child] < arr[child+1]: + child = 2 * current_parent + 1 + if child + 1 <= end and arr[child] < arr[child + 1]: child = child + 1 # Swap if child is greater than parent if arr[child] > arr[current_parent]: - temp = arr[current_parent] - arr[current_parent] = arr[child] - arr[child] = temp - + arr[current_parent], arr[child] = arr[child], arr[current_parent] current_parent = child # If no swap occured, no need to keep iterating else: @@ -42,35 +40,35 @@ def min_heap_sort(arr): """ Heap Sort that uses a min heap to sort an array in ascending order Complexity: O(n log(n)) """ - for i in range(0, len(arr)-1): + for i in range(0, len(arr) - 1): min_heapify(arr, i) return arr + def min_heapify(arr, start): """ Min heapify helper for min_heap_sort """ # Offset last_parent by the start (last_parent calculated as if start index was 0) - # All array accesses need to be offet by start - end = len(arr)-1 - last_parent = int((end-start-1)/2) + # All array accesses need to be offset by start + end = len(arr) - 1 + last_parent = (end - start - 1) // 2 # Iterate from last parent to first - for parent in range(last_parent,-1,-1): + for parent in range(last_parent, -1, -1): current_parent = parent # Iterate from current_parent to last_parent while current_parent <= last_parent: # Find lesser child of current_parent - child = 2*current_parent + 1 - if child + 1 <= end-start and arr[child+start] > arr[child+1+start]: + child = 2 * current_parent + 1 + if child + 1 <= end - start and arr[child + start] > arr[ + child + 1 + start]: child = child + 1 # Swap if child is less than parent - if arr[child+start] < arr[current_parent+start]: - temp = arr[current_parent+start] - arr[current_parent+start] = arr[child+start] - arr[child+start] = temp - + if arr[child + start] < arr[current_parent + start]: + arr[current_parent + start], arr[child + start] = \ + arr[child + start], arr[current_parent + start] current_parent = child # If no swap occured, no need to keep iterating else: diff --git a/sort/insertion_sort.py b/sort/insertion_sort.py index 07a0a5265..f6d1ce3c9 100644 --- a/sort/insertion_sort.py +++ b/sort/insertion_sort.py @@ -5,10 +5,10 @@ def insertion_sort(arr): for i in range(len(arr)): cursor = arr[i] pos = i - while pos > 0 and arr[pos-1] > cursor: + while pos > 0 and arr[pos - 1] > cursor: # Swap the number down the list - arr[pos] = arr[pos-1] - pos = pos-1 + arr[pos] = arr[pos - 1] + pos = pos - 1 # Break and do the final swap arr[pos] = cursor diff --git a/sort/meeting_rooms.py b/sort/meeting_rooms.py index 72ebb7d51..2cb60c69a 100644 --- a/sort/meeting_rooms.py +++ b/sort/meeting_rooms.py @@ -16,6 +16,6 @@ def can_attend_meetings(intervals): """ intervals = sorted(intervals, key=lambda x: x.start) for i in range(1, len(intervals)): - if intervals[i].start < intervals[i-1].end: + if intervals[i].start < intervals[i - 1].end: return False return True diff --git a/sort/merge_sort.py b/sort/merge_sort.py index e1b62b337..351a4c5e8 100644 --- a/sort/merge_sort.py +++ b/sort/merge_sort.py @@ -3,34 +3,36 @@ def merge_sort(arr): Complexity: O(n log(n)) """ # Our recursive base case - if len(arr)<= 1: + if len(arr) <= 1: return arr - mid = len(arr)//2 + mid = len(arr) // 2 # Perform merge_sort recursively on both halves - left, right = merge_sort(arr[mid:]), merge_sort(arr[:mid]) + left, right = merge_sort(arr[:mid]), merge_sort(arr[mid:]) # Merge each side together - return merge(left, right) + return merge(left, right, arr.copy()) -def merge(left, right): + +def merge(left, right, merged): """ Merge helper Complexity: O(n) """ - arr = [] - left_cursor, right_cursor = 0,0 + + left_cursor, right_cursor = 0, 0 while left_cursor < len(left) and right_cursor < len(right): # Sort each one and place into the result if left[left_cursor] <= right[right_cursor]: - arr.append(left[left_cursor]) - left_cursor+=1 + merged[left_cursor+right_cursor]=left[left_cursor] + left_cursor += 1 else: - arr.append(right[right_cursor]) - right_cursor+=1 - # Add the left overs if there's any left to the result - for i in range(left_cursor,len(left)): - arr.append(left[i]) - for i in range(right_cursor,len(right)): - arr.append(right[i]) + merged[left_cursor + right_cursor] = right[right_cursor] + right_cursor += 1 + # Add the left overs if there's any left to the result + for left_cursor in range(left_cursor, len(left)): + merged[left_cursor + right_cursor] = left[left_cursor] + # Add the left overs if there's any left to the result + for right_cursor in range(right_cursor, len(right)): + merged[left_cursor + right_cursor] = right[right_cursor] - # Return result - return arr + # Return result + return merged diff --git a/sort/quick_sort.py b/sort/quick_sort.py index ac91d6b49..a262bb4c1 100644 --- a/sort/quick_sort.py +++ b/sort/quick_sort.py @@ -1,17 +1,23 @@ -def quick_sort(arr, first, last): - """ Quicksort +def quick_sort(arr): + """ Quick sort Complexity: best O(n log(n)) avg O(n log(n)), worst O(N^2) """ + return quick_sort_recur(arr, 0, len(arr) - 1) + + +def quick_sort_recur(arr, first, last): if first < last: pos = partition(arr, first, last) # Start our two recursive calls - quick_sort(arr, first, pos-1) - quick_sort(arr, pos+1, last) + quick_sort_recur(arr, first, pos - 1) + quick_sort_recur(arr, pos + 1, last) return arr + + def partition(arr, first, last): wall = first for pos in range(first, last): - if arr[pos] < arr[last]: # last is the pivot + if arr[pos] < arr[last]: # last is the pivot arr[pos], arr[wall] = arr[wall], arr[pos] wall += 1 arr[wall], arr[last] = arr[last], arr[wall] diff --git a/sort/selection_sort.py b/sort/selection_sort.py index fed1c3466..c5db918dd 100644 --- a/sort/selection_sort.py +++ b/sort/selection_sort.py @@ -4,7 +4,7 @@ def selection_sort(arr): """ for i in range(len(arr)): minimum = i - for j in range(i+1, len(arr)): + for j in range(i + 1, len(arr)): # "Select" the correct value if arr[j] < arr[minimum]: minimum = j diff --git a/sort/sort_colors.py b/sort/sort_colors.py index e85879781..aa44e221e 100644 --- a/sort/sort_colors.py +++ b/sort/sort_colors.py @@ -25,6 +25,6 @@ def sort_colors(nums): if __name__ == "__main__": - nums = [0,1,1,1,2,2,2,1,1,1,0,0,0,0,1,1,1,0,0,2,2] + nums = [0, 1, 1, 1, 2, 2, 2, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 2, 2] sort_colors(nums) print(nums) diff --git a/sort/topsort.py b/sort/topsort.py index bca556d22..8341ce941 100644 --- a/sort/topsort.py +++ b/sort/topsort.py @@ -12,16 +12,16 @@ depGraph = { - "a" : [ "b" ], - "b" : [ "c" ], - "c" : [ 'e'], - 'e' : [ ], - "d" : [ ], - "f" : ["e" , "d"] + "a": ["b"], + "b": ["c"], + "c": ['e'], + 'e': [], + "d": [], + "f": ["e", "d"] } +given = ["b", "c", "a", "d", "e", "f"] -given = [ "b", "c", "a", "d", "e", "f" ] def ret_deps(visited, start): queue = [] @@ -46,7 +46,7 @@ def ret_dep_graph(): if pac in visited: continue visited.add(pac) - #out.append(pac) + # out.append(pac) if pac in depGraph: # find all children for child in depGraph[pac]: @@ -55,4 +55,6 @@ def ret_dep_graph(): out.extend(ret_deps(visited, child)) out.append(pac) print(out) + + ret_dep_graph() diff --git a/sort/wiggle_sort.py b/sort/wiggle_sort.py index 2e09584c3..15dc76d4b 100644 --- a/sort/wiggle_sort.py +++ b/sort/wiggle_sort.py @@ -1,4 +1,6 @@ - +""" +Given an unsorted array nums, reorder it such that nums[0] < nums[1] > nums[2] < nums[3].... +""" def wiggle_sort(nums): for i in range(len(nums)): if (i % 2 == 1) == (nums[i-1] > nums[i]): diff --git a/tests/test_sort.py b/tests/test_sort.py index 3a62d07cd..30f27621c 100644 --- a/tests/test_sort.py +++ b/tests/test_sort.py @@ -9,42 +9,44 @@ import unittest + class TestSuite(unittest.TestCase): - def test_bubble_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - bubble_sort([1, 5, 65, 23, 57, 1232])) - - def test_comb_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - comb_sort([1, 5, 65, 23, 57, 1232])) - - def test_counting_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - counting_sort([1, 5, 65, 23, 57, 1232])) - self.assertEqual([-1232, -65, -57, -23, -5, -1], - counting_sort([-1, -5, -65, -23, -57, -1232])) - - def test_heap_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - max_heap_sort([1, 5, 65, 23, 57, 1232])) - self.assertEqual([1, 5, 23, 57, 65, 1232], - min_heap_sort([1, 5, 65, 23, 57, 1232])) - - def test_insertion_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - insertion_sort([1, 5, 65, 23, 57, 1232])) - - def test_merge_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - merge_sort([1, 5, 65, 23, 57, 1232])) - - def test_quick_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - quick_sort([1, 5, 65, 23, 57, 1232], 0, 5)) - - def test_selection_sort(self): - self.assertEqual([1, 5, 23, 57, 65, 1232], - selection_sort([1, 5, 65, 23, 57, 1232])) + def test_bubble_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + bubble_sort([1, 5, 65, 23, 57, 1232])) + + def test_comb_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + comb_sort([1, 5, 65, 23, 57, 1232])) + + def test_counting_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + counting_sort([1, 5, 65, 23, 57, 1232])) + self.assertEqual([-1232, -65, -57, -23, -5, -1], + counting_sort([-1, -5, -65, -23, -57, -1232])) + + def test_heap_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + max_heap_sort([1, 5, 65, 23, 57, 1232])) + self.assertEqual([1, 5, 23, 57, 65, 1232], + min_heap_sort([1, 5, 65, 23, 57, 1232])) + + def test_insertion_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + insertion_sort([1, 5, 65, 23, 57, 1232])) + + def test_merge_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + merge_sort([1, 5, 65, 23, 57, 1232])) + + def test_quick_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + quick_sort([1, 5, 65, 23, 57, 1232])) + + def test_selection_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + selection_sort([1, 5, 65, 23, 57, 1232])) + if __name__ == "__main__": unittest.main() From a2f55985a4dd8726f1471e0b7aa6e0e346426452 Mon Sep 17 00:00:00 2001 From: keon Date: Fri, 25 May 2018 15:58:57 -0400 Subject: [PATCH 284/387] reorganize arrays --- algorithms/arrays/__init__.py | 13 ++ {arrays => algorithms/arrays}/delete_nth.py | 0 {arrays => algorithms/arrays}/flatten.py | 2 +- {arrays => algorithms/arrays}/garage.py | 0 .../arrays/josephus.py | 0 .../arrays}/longest_non_repeat.py | 4 +- .../arrays}/merge_intervals.py | 2 +- .../arrays}/missing_ranges.py | 0 .../arrays/move_zeros.py | 0 {arrays => algorithms/arrays}/plus_one.py | 2 +- .../arrays/rotate.py | 0 .../arrays/summarize_ranges.py | 2 +- {arrays => algorithms/arrays}/three_sum.py | 0 {arrays => algorithms/arrays}/two_sum.py | 0 arrays/__init__.py | 0 tests/test_array.py | 127 +++++++++++------- 16 files changed, 94 insertions(+), 58 deletions(-) create mode 100644 algorithms/arrays/__init__.py rename {arrays => algorithms/arrays}/delete_nth.py (100%) rename {arrays => algorithms/arrays}/flatten.py (94%) rename {arrays => algorithms/arrays}/garage.py (100%) rename arrays/josephus_problem.py => algorithms/arrays/josephus.py (100%) rename {arrays => algorithms/arrays}/longest_non_repeat.py (94%) rename {arrays => algorithms/arrays}/merge_intervals.py (98%) rename {arrays => algorithms/arrays}/missing_ranges.py (100%) rename arrays/move_zeros_to_end.py => algorithms/arrays/move_zeros.py (100%) rename {arrays => algorithms/arrays}/plus_one.py (97%) rename arrays/rotate_array.py => algorithms/arrays/rotate.py (100%) rename arrays/summary_ranges.py => algorithms/arrays/summarize_ranges.py (95%) rename {arrays => algorithms/arrays}/three_sum.py (100%) rename {arrays => algorithms/arrays}/two_sum.py (100%) delete mode 100644 arrays/__init__.py diff --git a/algorithms/arrays/__init__.py b/algorithms/arrays/__init__.py new file mode 100644 index 000000000..04afdb2f9 --- /dev/null +++ b/algorithms/arrays/__init__.py @@ -0,0 +1,13 @@ +from .delete_nth import * +from .flatten import * +from .garage import * +from .josephus import * +from .longest_non_repeat import * +from .merge_intervals import * +from .missing_ranges import * +from .move_zeros import * +from .plus_one import * +from .rotate import * +from .summarize_ranges import * +from .three_sum import * +from .two_sum import * diff --git a/arrays/delete_nth.py b/algorithms/arrays/delete_nth.py similarity index 100% rename from arrays/delete_nth.py rename to algorithms/arrays/delete_nth.py diff --git a/arrays/flatten.py b/algorithms/arrays/flatten.py similarity index 94% rename from arrays/flatten.py rename to algorithms/arrays/flatten.py index 2b047461a..f2eba48fe 100644 --- a/arrays/flatten.py +++ b/algorithms/arrays/flatten.py @@ -26,6 +26,6 @@ def flatten_iter(iterable): """ for element in iterable: if isinstance(element, Iterable): - yield from flatten(element) + yield from flatten_iter(element) else: yield element diff --git a/arrays/garage.py b/algorithms/arrays/garage.py similarity index 100% rename from arrays/garage.py rename to algorithms/arrays/garage.py diff --git a/arrays/josephus_problem.py b/algorithms/arrays/josephus.py similarity index 100% rename from arrays/josephus_problem.py rename to algorithms/arrays/josephus.py diff --git a/arrays/longest_non_repeat.py b/algorithms/arrays/longest_non_repeat.py similarity index 94% rename from arrays/longest_non_repeat.py rename to algorithms/arrays/longest_non_repeat.py index 43f2055ed..e97efcca0 100644 --- a/arrays/longest_non_repeat.py +++ b/algorithms/arrays/longest_non_repeat.py @@ -10,7 +10,7 @@ """ -def longest_non_repeat(string): +def longest_non_repeat_v1(string): """ Finds the length of the longest substring without repeating characters. @@ -27,7 +27,7 @@ def longest_non_repeat(string): return max_len -def longest_non_repeat_two(string): +def longest_non_repeat_v2(string): """ Finds the length of the longest substring without repeating characters. diff --git a/arrays/merge_intervals.py b/algorithms/arrays/merge_intervals.py similarity index 98% rename from arrays/merge_intervals.py rename to algorithms/arrays/merge_intervals.py index 606ca3427..ee9ce6053 100644 --- a/arrays/merge_intervals.py +++ b/algorithms/arrays/merge_intervals.py @@ -64,7 +64,7 @@ def print_intervals(intervals): print("".join(res)) -def merge_v2(intervals): +def merge_intervals(intervals): """ Merges intervals in the form of list. """ if intervals is None: return None diff --git a/arrays/missing_ranges.py b/algorithms/arrays/missing_ranges.py similarity index 100% rename from arrays/missing_ranges.py rename to algorithms/arrays/missing_ranges.py diff --git a/arrays/move_zeros_to_end.py b/algorithms/arrays/move_zeros.py similarity index 100% rename from arrays/move_zeros_to_end.py rename to algorithms/arrays/move_zeros.py diff --git a/arrays/plus_one.py b/algorithms/arrays/plus_one.py similarity index 97% rename from arrays/plus_one.py rename to algorithms/arrays/plus_one.py index 9edb02fa5..d5bf347f6 100644 --- a/arrays/plus_one.py +++ b/algorithms/arrays/plus_one.py @@ -7,7 +7,7 @@ """ -def plus_one(digits): +def plus_one_v1(digits): """ :type digits: List[int] :rtype: List[int] diff --git a/arrays/rotate_array.py b/algorithms/arrays/rotate.py similarity index 100% rename from arrays/rotate_array.py rename to algorithms/arrays/rotate.py diff --git a/arrays/summary_ranges.py b/algorithms/arrays/summarize_ranges.py similarity index 95% rename from arrays/summary_ranges.py rename to algorithms/arrays/summarize_ranges.py index 3ee3417f2..8cfba68e1 100644 --- a/arrays/summary_ranges.py +++ b/algorithms/arrays/summarize_ranges.py @@ -6,7 +6,7 @@ """ -def summary_ranges(array): +def summarize_ranges(array): """ :type array: List[int] :rtype: List[] diff --git a/arrays/three_sum.py b/algorithms/arrays/three_sum.py similarity index 100% rename from arrays/three_sum.py rename to algorithms/arrays/three_sum.py diff --git a/arrays/two_sum.py b/algorithms/arrays/two_sum.py similarity index 100% rename from arrays/two_sum.py rename to algorithms/arrays/two_sum.py diff --git a/arrays/__init__.py b/arrays/__init__.py deleted file mode 100644 index e69de29bb..000000000 diff --git a/tests/test_array.py b/tests/test_array.py index acae48393..88cf59173 100644 --- a/tests/test_array.py +++ b/tests/test_array.py @@ -1,16 +1,16 @@ -from arrays.delete_nth import delete_nth, delete_nth_naive -from arrays.flatten import flatten, flatten_iter -from arrays.garage import garage -from arrays.josephus_problem import josephus -from arrays.longest_non_repeat import longest_non_repeat, longest_non_repeat_two -from arrays.merge_intervals import Interval, merge_v2 -from arrays.missing_ranges import missing_ranges -from arrays.move_zeros_to_end import move_zeros -from arrays.plus_one import plus_one, plus_one_v2, plus_one_v3 -from arrays.rotate_array import rotate_v1, rotate_v2, rotate_v3 -from arrays.summary_ranges import summary_ranges -from arrays.three_sum import three_sum -from arrays.two_sum import two_sum +from algorithms.arrays import delete_nth, delete_nth_naive +from algorithms.arrays import flatten, flatten_iter +from algorithms.arrays import garage +from algorithms.arrays import josephus +from algorithms.arrays import longest_non_repeat_v1, longest_non_repeat_v2 +from algorithms.arrays import Interval, merge_intervals +from algorithms.arrays import missing_ranges +from algorithms.arrays import move_zeros +from algorithms.arrays import plus_one_v1, plus_one_v2, plus_one_v3 +from algorithms.arrays import rotate_v1, rotate_v2, rotate_v3 +from algorithms.arrays import summarize_ranges +from algorithms.arrays import three_sum +from algorithms.arrays import two_sum import unittest @@ -37,15 +37,19 @@ class TestDeleteNth(unittest.TestCase): def test_delete_nth_naive(self): - self.assertListEqual(delete_nth_naive([20, 37, 20, 21, 37, 21, 21], n=1), + self.assertListEqual(delete_nth_naive( + [20, 37, 20, 21, 37, 21, 21], n=1), [20, 37, 21]) - self.assertListEqual(delete_nth_naive([1, 1, 3, 3, 7, 2, 2, 2, 2], n=3), + self.assertListEqual(delete_nth_naive( + [1, 1, 3, 3, 7, 2, 2, 2, 2], n=3), [1, 1, 3, 3, 7, 2, 2, 2]) - self.assertListEqual(delete_nth_naive([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=3), + self.assertListEqual(delete_nth_naive( + [1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=3), [1, 2, 3, 1, 1, 2, 2, 3, 3, 4, 5]) self.assertListEqual(delete_nth_naive([], n=5), []) - self.assertListEqual(delete_nth_naive([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=0), + self.assertListEqual(delete_nth_naive( + [1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=0), []) def test_delete_nth(self): @@ -117,32 +121,35 @@ def test_garage(self): steps, seq = garage(initial, final) self.assertEqual(steps, 4) - self.assertListEqual(seq, [[0, 2, 3, 1, 4], [2, 0, 3, 1, 4], [2, 3, 0, 1, 4], [0, 3, 2, 1, 4]]) + self.assertListEqual(seq, [[0, 2, 3, 1, 4], + [2, 0, 3, 1, 4], + [2, 3, 0, 1, 4], + [0, 3, 2, 1, 4]]) class TestLongestNonRepeat(unittest.TestCase): - def test_longest_non_repeat(self): + def test_longest_non_repeat_v1(self): string = "abcabcbb" - self.assertEqual(longest_non_repeat(string), 3) + self.assertEqual(longest_non_repeat_v1(string), 3) string = "bbbbb" - self.assertEqual(longest_non_repeat(string), 1) + self.assertEqual(longest_non_repeat_v1(string), 1) string = "pwwkew" - self.assertEqual(longest_non_repeat(string), 3) + self.assertEqual(longest_non_repeat_v1(string), 3) - def test_longest_non_repeat_two(self): + def test_longest_non_repeat_v2(self): string = "abcabcbb" - self.assertEqual(longest_non_repeat_two(string), 3) + self.assertEqual(longest_non_repeat_v2(string), 3) string = "bbbbb" - self.assertEqual(longest_non_repeat_two(string), 1) + self.assertEqual(longest_non_repeat_v2(string), 1) string = "pwwkew" - self.assertEqual(longest_non_repeat_two(string), 3) + self.assertEqual(longest_non_repeat_v2(string), 3) class TestMergeInterval(unittest.TestCase): @@ -156,9 +163,9 @@ def test_merge(self): [Interval(1, 6), Interval(8, 10), Interval(15, 18)] ) - def test_merge_v2(self): + def test_merge_intervals(self): interval_list = [[1, 3], [2, 6], [8, 10], [15, 18]] - merged_intervals = merge_v2(interval_list) + merged_intervals = merge_intervals(interval_list) self.assertEqual( merged_intervals, [[1, 6], [8, 10], [15, 18]] @@ -172,7 +179,8 @@ def test_missing_ranges(self): arr = [3, 5, 10, 11, 12, 15, 19] self.assertListEqual(missing_ranges(arr, 0, 20), - [(0, 2), (4, 4), (6, 9), (13, 14), (16, 18), (20, 20)]) + [(0, 2), (4, 4), (6, 9), + (13, 14), (16, 18), (20, 20)]) self.assertListEqual(missing_ranges(arr, 6, 100), [(6, 9), (13, 14), (16, 18), (20, 100)]) @@ -191,64 +199,79 @@ def test_move_zeros(self): class TestPlusOne(unittest.TestCase): - def test_plus_one(self): + def test_plus_one_v1(self): - self.assertListEqual(plus_one([0]), [1]) - self.assertListEqual(plus_one([9]), [1, 0]) - self.assertListEqual(plus_one([1, 0, 9]), [1, 1, 0]) - self.assertListEqual(plus_one([9, 9, 8, 0, 0, 9]), [9, 9, 8, 0, 1, 0]) - self.assertListEqual(plus_one([9, 9, 9, 9]), [1, 0, 0, 0, 0]) + self.assertListEqual(plus_one_v1([0]), [1]) + self.assertListEqual(plus_one_v1([9]), [1, 0]) + self.assertListEqual(plus_one_v1([1, 0, 9]), [1, 1, 0]) + self.assertListEqual(plus_one_v1([9, 9, 8, 0, 0, 9]), + [9, 9, 8, 0, 1, 0]) + self.assertListEqual(plus_one_v1([9, 9, 9, 9]), + [1, 0, 0, 0, 0]) def test_plus_one_v2(self): self.assertListEqual(plus_one_v2([0]), [1]) self.assertListEqual(plus_one_v2([9]), [1, 0]) self.assertListEqual(plus_one_v2([1, 0, 9]), [1, 1, 0]) - self.assertListEqual(plus_one_v2([9, 9, 8, 0, 0, 9]), [9, 9, 8, 0, 1, 0]) - self.assertListEqual(plus_one_v2([9, 9, 9, 9]), [1, 0, 0, 0, 0]) + self.assertListEqual(plus_one_v2([9, 9, 8, 0, 0, 9]), + [9, 9, 8, 0, 1, 0]) + self.assertListEqual(plus_one_v2([9, 9, 9, 9]), + [1, 0, 0, 0, 0]) def test_plus_one_v3(self): self.assertListEqual(plus_one_v3([0]), [1]) self.assertListEqual(plus_one_v3([9]), [1, 0]) self.assertListEqual(plus_one_v3([1, 0, 9]), [1, 1, 0]) - self.assertListEqual(plus_one_v3([9, 9, 8, 0, 0, 9]), [9, 9, 8, 0, 1, 0]) - self.assertListEqual(plus_one_v3([9, 9, 9, 9]), [1, 0, 0, 0, 0]) + self.assertListEqual(plus_one_v3([9, 9, 8, 0, 0, 9]), + [9, 9, 8, 0, 1, 0]) + self.assertListEqual(plus_one_v3([9, 9, 9, 9]), + [1, 0, 0, 0, 0]) class TestRotateArray(unittest.TestCase): def test_rotate_v1(self): - self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=3), [5, 6, 7, 1, 2, 3, 4]) - self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=1), [7, 1, 2, 3, 4, 5, 6]) - self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=7), [1, 2, 3, 4, 5, 6, 7]) + self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=3), + [5, 6, 7, 1, 2, 3, 4]) + self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=1), + [7, 1, 2, 3, 4, 5, 6]) + self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=7), + [1, 2, 3, 4, 5, 6, 7]) self.assertListEqual(rotate_v1([1, 2], k=111), [2, 1]) def test_rotate_v2(self): - self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=3), [5, 6, 7, 1, 2, 3, 4]) - self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=1), [7, 1, 2, 3, 4, 5, 6]) - self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=7), [1, 2, 3, 4, 5, 6, 7]) + self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=3), + [5, 6, 7, 1, 2, 3, 4]) + self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=1), + [7, 1, 2, 3, 4, 5, 6]) + self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=7), + [1, 2, 3, 4, 5, 6, 7]) self.assertListEqual(rotate_v2([1, 2], k=111), [2, 1]) def test_rotate_v3(self): - self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=3), [5, 6, 7, 1, 2, 3, 4]) - self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=1), [7, 1, 2, 3, 4, 5, 6]) - self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=7), [1, 2, 3, 4, 5, 6, 7]) + self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=3), + [5, 6, 7, 1, 2, 3, 4]) + self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=1), + [7, 1, 2, 3, 4, 5, 6]) + self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=7), + [1, 2, 3, 4, 5, 6, 7]) self.assertListEqual(rotate_v3([1, 2], k=111), [2, 1]) class TestSummaryRanges(unittest.TestCase): - def test_summary_ranges(self): + def test_summarize_ranges(self): - self.assertListEqual(summary_ranges([0, 1, 2, 4, 5, 7]), + self.assertListEqual(summarize_ranges([0, 1, 2, 4, 5, 7]), [(0, 2), (4, 5), (7, 7)]) - self.assertListEqual(summary_ranges([-5, -4, -3, 1, 2, 4, 5, 6]), + self.assertListEqual(summarize_ranges([-5, -4, -3, 1, 2, 4, 5, 6]), [(-5, -3), (1, 2), (4, 6)]) - self.assertListEqual(summary_ranges([-2, -1, 0, 1, 2]), + self.assertListEqual(summarize_ranges([-2, -1, 0, 1, 2]), [(-2, 2)]) From dd6567a03af84b3571c0adb7723b13a4fa519b6c Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 14:07:19 -0700 Subject: [PATCH 285/387] reorganize linkedlist --- algorithms/linkedlist/__init__.py | 8 ++++++++ .../linkedlist}/add_two_numbers.py | 0 .../linkedlist}/copy_random_pointer.py | 0 .../linkedlist}/delete_node.py | 0 .../linkedlist}/first_cyclic_node.py | 0 .../linkedlist}/intersection.py | 0 .../linkedlist}/is_cyclic.py | 0 .../linkedlist}/is_palindrome.py | 0 .../linkedlist}/is_sorted.py | 0 .../linkedlist}/kth_to_last.py | 0 .../linkedlist}/linkedlist.py | 0 .../linkedlist}/merge_two_list.py | 0 .../linkedlist}/partition.py | 0 .../linkedlist}/remove_duplicates.py | 0 .../linkedlist}/remove_range.py | 0 .../linkedlist}/reverse.py | 0 .../linkedlist}/rotate_list.py | 0 .../linkedlist}/swap_in_pairs.py | 0 linkedlist/__init__.py | 0 tests/test_linkedlist.py | 18 ++++++++++-------- 20 files changed, 18 insertions(+), 8 deletions(-) create mode 100644 algorithms/linkedlist/__init__.py rename {linkedlist => algorithms/linkedlist}/add_two_numbers.py (100%) rename {linkedlist => algorithms/linkedlist}/copy_random_pointer.py (100%) rename {linkedlist => algorithms/linkedlist}/delete_node.py (100%) rename {linkedlist => algorithms/linkedlist}/first_cyclic_node.py (100%) rename {linkedlist => algorithms/linkedlist}/intersection.py (100%) rename {linkedlist => algorithms/linkedlist}/is_cyclic.py (100%) rename {linkedlist => algorithms/linkedlist}/is_palindrome.py (100%) rename {linkedlist => algorithms/linkedlist}/is_sorted.py (100%) rename {linkedlist => algorithms/linkedlist}/kth_to_last.py (100%) rename {linkedlist => algorithms/linkedlist}/linkedlist.py (100%) rename {linkedlist => algorithms/linkedlist}/merge_two_list.py (100%) rename {linkedlist => algorithms/linkedlist}/partition.py (100%) rename {linkedlist => algorithms/linkedlist}/remove_duplicates.py (100%) rename {linkedlist => algorithms/linkedlist}/remove_range.py (100%) rename {linkedlist => algorithms/linkedlist}/reverse.py (100%) rename {linkedlist => algorithms/linkedlist}/rotate_list.py (100%) rename {linkedlist => algorithms/linkedlist}/swap_in_pairs.py (100%) delete mode 100644 linkedlist/__init__.py diff --git a/algorithms/linkedlist/__init__.py b/algorithms/linkedlist/__init__.py new file mode 100644 index 000000000..21263bfe9 --- /dev/null +++ b/algorithms/linkedlist/__init__.py @@ -0,0 +1,8 @@ +from .reverse import * +from .is_sorted import * +from .remove_range import * +from .swap_in_pairs import * +from .rotate_list import * +from .is_cyclic import * +from .merge_two_list import * +from .is_palindrome import * diff --git a/linkedlist/add_two_numbers.py b/algorithms/linkedlist/add_two_numbers.py similarity index 100% rename from linkedlist/add_two_numbers.py rename to algorithms/linkedlist/add_two_numbers.py diff --git a/linkedlist/copy_random_pointer.py b/algorithms/linkedlist/copy_random_pointer.py similarity index 100% rename from linkedlist/copy_random_pointer.py rename to algorithms/linkedlist/copy_random_pointer.py diff --git a/linkedlist/delete_node.py b/algorithms/linkedlist/delete_node.py similarity index 100% rename from linkedlist/delete_node.py rename to algorithms/linkedlist/delete_node.py diff --git a/linkedlist/first_cyclic_node.py b/algorithms/linkedlist/first_cyclic_node.py similarity index 100% rename from linkedlist/first_cyclic_node.py rename to algorithms/linkedlist/first_cyclic_node.py diff --git a/linkedlist/intersection.py b/algorithms/linkedlist/intersection.py similarity index 100% rename from linkedlist/intersection.py rename to algorithms/linkedlist/intersection.py diff --git a/linkedlist/is_cyclic.py b/algorithms/linkedlist/is_cyclic.py similarity index 100% rename from linkedlist/is_cyclic.py rename to algorithms/linkedlist/is_cyclic.py diff --git a/linkedlist/is_palindrome.py b/algorithms/linkedlist/is_palindrome.py similarity index 100% rename from linkedlist/is_palindrome.py rename to algorithms/linkedlist/is_palindrome.py diff --git a/linkedlist/is_sorted.py b/algorithms/linkedlist/is_sorted.py similarity index 100% rename from linkedlist/is_sorted.py rename to algorithms/linkedlist/is_sorted.py diff --git a/linkedlist/kth_to_last.py b/algorithms/linkedlist/kth_to_last.py similarity index 100% rename from linkedlist/kth_to_last.py rename to algorithms/linkedlist/kth_to_last.py diff --git a/linkedlist/linkedlist.py b/algorithms/linkedlist/linkedlist.py similarity index 100% rename from linkedlist/linkedlist.py rename to algorithms/linkedlist/linkedlist.py diff --git a/linkedlist/merge_two_list.py b/algorithms/linkedlist/merge_two_list.py similarity index 100% rename from linkedlist/merge_two_list.py rename to algorithms/linkedlist/merge_two_list.py diff --git a/linkedlist/partition.py b/algorithms/linkedlist/partition.py similarity index 100% rename from linkedlist/partition.py rename to algorithms/linkedlist/partition.py diff --git a/linkedlist/remove_duplicates.py b/algorithms/linkedlist/remove_duplicates.py similarity index 100% rename from linkedlist/remove_duplicates.py rename to algorithms/linkedlist/remove_duplicates.py diff --git a/linkedlist/remove_range.py b/algorithms/linkedlist/remove_range.py similarity index 100% rename from linkedlist/remove_range.py rename to algorithms/linkedlist/remove_range.py diff --git a/linkedlist/reverse.py b/algorithms/linkedlist/reverse.py similarity index 100% rename from linkedlist/reverse.py rename to algorithms/linkedlist/reverse.py diff --git a/linkedlist/rotate_list.py b/algorithms/linkedlist/rotate_list.py similarity index 100% rename from linkedlist/rotate_list.py rename to algorithms/linkedlist/rotate_list.py diff --git a/linkedlist/swap_in_pairs.py b/algorithms/linkedlist/swap_in_pairs.py similarity index 100% rename from linkedlist/swap_in_pairs.py rename to algorithms/linkedlist/swap_in_pairs.py diff --git a/linkedlist/__init__.py b/linkedlist/__init__.py deleted file mode 100644 index e69de29bb..000000000 diff --git a/tests/test_linkedlist.py b/tests/test_linkedlist.py index 89096bc9b..435ac7261 100644 --- a/tests/test_linkedlist.py +++ b/tests/test_linkedlist.py @@ -1,11 +1,13 @@ -from linkedlist.reverse import reverse_list, reverse_list_recursive -from linkedlist.is_sorted import is_sorted -from linkedlist.remove_range import remove_range -from linkedlist.swap_in_pairs import swap_pairs -from linkedlist.rotate_list import rotate_right -from linkedlist.is_cyclic import is_cyclic -from linkedlist.merge_two_list import merge_two_list, merge_two_list_recur -from linkedlist.is_palindrome import is_palindrome, is_palindrome_stack, is_palindrome_dict +from algorithms.linkedlist import ( + reverse_list, reverse_list_recursive, + is_sorted, + remove_range, + swap_pairs, + rotate_right, + is_cyclic, + merge_two_list, merge_two_list_recur, + is_palindrome, is_palindrome_stack, is_palindrome_dict +) import unittest From c9efa52ec15d46805116aa516143b35667c1f1a3 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 14:13:26 -0700 Subject: [PATCH 286/387] reorganize backtrack --- {backtrack => algorithms/backtrack}/anagram.py | 0 {backtrack => algorithms/backtrack}/array_sum_combinations.py | 0 {backtrack => algorithms/backtrack}/combination_sum.py | 0 {backtrack => algorithms/backtrack}/expression_add_operators.py | 0 {backtrack => algorithms/backtrack}/factor_combinations.py | 0 {backtrack => algorithms/backtrack}/general_solution.md | 0 {backtrack => algorithms/backtrack}/generate_abbreviations.py | 0 {backtrack => algorithms/backtrack}/generate_parenthesis.py | 0 {backtrack => algorithms/backtrack}/letter_combination.py | 0 {backtrack => algorithms/backtrack}/palindrome_partitioning.py | 0 {backtrack => algorithms/backtrack}/pattern_match.py | 0 {backtrack => algorithms/backtrack}/permute.py | 0 {backtrack => algorithms/backtrack}/permute_unique.py | 0 {backtrack => algorithms/backtrack}/subsets.py | 0 {backtrack => algorithms/backtrack}/subsets_unique.py | 0 {backtrack => algorithms/backtrack}/word_search.py | 0 16 files changed, 0 insertions(+), 0 deletions(-) rename {backtrack => algorithms/backtrack}/anagram.py (100%) rename {backtrack => algorithms/backtrack}/array_sum_combinations.py (100%) rename {backtrack => algorithms/backtrack}/combination_sum.py (100%) rename {backtrack => algorithms/backtrack}/expression_add_operators.py (100%) rename {backtrack => algorithms/backtrack}/factor_combinations.py (100%) rename {backtrack => algorithms/backtrack}/general_solution.md (100%) rename {backtrack => algorithms/backtrack}/generate_abbreviations.py (100%) rename {backtrack => algorithms/backtrack}/generate_parenthesis.py (100%) rename {backtrack => algorithms/backtrack}/letter_combination.py (100%) rename {backtrack => algorithms/backtrack}/palindrome_partitioning.py (100%) rename {backtrack => algorithms/backtrack}/pattern_match.py (100%) rename {backtrack => algorithms/backtrack}/permute.py (100%) rename {backtrack => algorithms/backtrack}/permute_unique.py (100%) rename {backtrack => algorithms/backtrack}/subsets.py (100%) rename {backtrack => algorithms/backtrack}/subsets_unique.py (100%) rename {backtrack => algorithms/backtrack}/word_search.py (100%) diff --git a/backtrack/anagram.py b/algorithms/backtrack/anagram.py similarity index 100% rename from backtrack/anagram.py rename to algorithms/backtrack/anagram.py diff --git a/backtrack/array_sum_combinations.py b/algorithms/backtrack/array_sum_combinations.py similarity index 100% rename from backtrack/array_sum_combinations.py rename to algorithms/backtrack/array_sum_combinations.py diff --git a/backtrack/combination_sum.py b/algorithms/backtrack/combination_sum.py similarity index 100% rename from backtrack/combination_sum.py rename to algorithms/backtrack/combination_sum.py diff --git a/backtrack/expression_add_operators.py b/algorithms/backtrack/expression_add_operators.py similarity index 100% rename from backtrack/expression_add_operators.py rename to algorithms/backtrack/expression_add_operators.py diff --git a/backtrack/factor_combinations.py b/algorithms/backtrack/factor_combinations.py similarity index 100% rename from backtrack/factor_combinations.py rename to algorithms/backtrack/factor_combinations.py diff --git a/backtrack/general_solution.md b/algorithms/backtrack/general_solution.md similarity index 100% rename from backtrack/general_solution.md rename to algorithms/backtrack/general_solution.md diff --git a/backtrack/generate_abbreviations.py b/algorithms/backtrack/generate_abbreviations.py similarity index 100% rename from backtrack/generate_abbreviations.py rename to algorithms/backtrack/generate_abbreviations.py diff --git a/backtrack/generate_parenthesis.py b/algorithms/backtrack/generate_parenthesis.py similarity index 100% rename from backtrack/generate_parenthesis.py rename to algorithms/backtrack/generate_parenthesis.py diff --git a/backtrack/letter_combination.py b/algorithms/backtrack/letter_combination.py similarity index 100% rename from backtrack/letter_combination.py rename to algorithms/backtrack/letter_combination.py diff --git a/backtrack/palindrome_partitioning.py b/algorithms/backtrack/palindrome_partitioning.py similarity index 100% rename from backtrack/palindrome_partitioning.py rename to algorithms/backtrack/palindrome_partitioning.py diff --git a/backtrack/pattern_match.py b/algorithms/backtrack/pattern_match.py similarity index 100% rename from backtrack/pattern_match.py rename to algorithms/backtrack/pattern_match.py diff --git a/backtrack/permute.py b/algorithms/backtrack/permute.py similarity index 100% rename from backtrack/permute.py rename to algorithms/backtrack/permute.py diff --git a/backtrack/permute_unique.py b/algorithms/backtrack/permute_unique.py similarity index 100% rename from backtrack/permute_unique.py rename to algorithms/backtrack/permute_unique.py diff --git a/backtrack/subsets.py b/algorithms/backtrack/subsets.py similarity index 100% rename from backtrack/subsets.py rename to algorithms/backtrack/subsets.py diff --git a/backtrack/subsets_unique.py b/algorithms/backtrack/subsets_unique.py similarity index 100% rename from backtrack/subsets_unique.py rename to algorithms/backtrack/subsets_unique.py diff --git a/backtrack/word_search.py b/algorithms/backtrack/word_search.py similarity index 100% rename from backtrack/word_search.py rename to algorithms/backtrack/word_search.py From 567c619b905f765039efddebcc897e38a423cf35 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 14:16:08 -0700 Subject: [PATCH 287/387] reorganize bfs --- {bfs => algorithms/bfs}/shortest_distance_from_all_buildings.py | 0 {bfs => algorithms/bfs}/word_ladder.py | 0 2 files changed, 0 insertions(+), 0 deletions(-) rename {bfs => algorithms/bfs}/shortest_distance_from_all_buildings.py (100%) rename {bfs => algorithms/bfs}/word_ladder.py (100%) diff --git a/bfs/shortest_distance_from_all_buildings.py b/algorithms/bfs/shortest_distance_from_all_buildings.py similarity index 100% rename from bfs/shortest_distance_from_all_buildings.py rename to algorithms/bfs/shortest_distance_from_all_buildings.py diff --git a/bfs/word_ladder.py b/algorithms/bfs/word_ladder.py similarity index 100% rename from bfs/word_ladder.py rename to algorithms/bfs/word_ladder.py From 1a25a844905b74fd236d3018c6d9fb595b880908 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 14:17:31 -0700 Subject: [PATCH 288/387] reorganize dfs --- {dfs => algorithms/dfs}/all_factors.py | 0 {dfs => algorithms/dfs}/count_islands.py | 0 {dfs => algorithms/dfs}/pacific_atlantic.py | 0 {dfs => algorithms/dfs}/sudoku_solver.py | 0 {dfs => algorithms/dfs}/walls_and_gates.py | 0 5 files changed, 0 insertions(+), 0 deletions(-) rename {dfs => algorithms/dfs}/all_factors.py (100%) rename {dfs => algorithms/dfs}/count_islands.py (100%) rename {dfs => algorithms/dfs}/pacific_atlantic.py (100%) rename {dfs => algorithms/dfs}/sudoku_solver.py (100%) rename {dfs => algorithms/dfs}/walls_and_gates.py (100%) diff --git a/dfs/all_factors.py b/algorithms/dfs/all_factors.py similarity index 100% rename from dfs/all_factors.py rename to algorithms/dfs/all_factors.py diff --git a/dfs/count_islands.py b/algorithms/dfs/count_islands.py similarity index 100% rename from dfs/count_islands.py rename to algorithms/dfs/count_islands.py diff --git a/dfs/pacific_atlantic.py b/algorithms/dfs/pacific_atlantic.py similarity index 100% rename from dfs/pacific_atlantic.py rename to algorithms/dfs/pacific_atlantic.py diff --git a/dfs/sudoku_solver.py b/algorithms/dfs/sudoku_solver.py similarity index 100% rename from dfs/sudoku_solver.py rename to algorithms/dfs/sudoku_solver.py diff --git a/dfs/walls_and_gates.py b/algorithms/dfs/walls_and_gates.py similarity index 100% rename from dfs/walls_and_gates.py rename to algorithms/dfs/walls_and_gates.py From 3c4325afe6d5c1c126c7dd224f2ac827ec581e3c Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 14:19:51 -0700 Subject: [PATCH 289/387] reorganize dp --- {dp => algorithms/dp}/buy_sell_stock.py | 0 {dp => algorithms/dp}/climbing_stairs.py | 0 {dp => algorithms/dp}/coin_change.py | 0 {dp => algorithms/dp}/combination_sum.py | 0 {dp => algorithms/dp}/egg_drop.py | 0 {dp => algorithms/dp}/fib.py | 0 {dp => algorithms/dp}/house_robber.py | 0 {dp => algorithms/dp}/job_scheduling.py | 0 {dp => algorithms/dp}/knapsack.py | 0 {dp => algorithms/dp}/longest_increasing.py | 0 {dp => algorithms/dp}/matrix_chain_order.py | 0 {dp => algorithms/dp}/max_product_subarray.py | 0 {dp => algorithms/dp}/max_subarray.py | 0 {dp => algorithms/dp}/min_cost_path.py | 0 {dp => algorithms/dp}/num_decodings.py | 0 {dp => algorithms/dp}/regex_matching.py | 0 {dp => algorithms/dp}/rod_cut.py | 0 {dp => algorithms/dp}/word_break.py | 0 18 files changed, 0 insertions(+), 0 deletions(-) rename {dp => algorithms/dp}/buy_sell_stock.py (100%) rename {dp => algorithms/dp}/climbing_stairs.py (100%) rename {dp => algorithms/dp}/coin_change.py (100%) rename {dp => algorithms/dp}/combination_sum.py (100%) rename {dp => algorithms/dp}/egg_drop.py (100%) rename {dp => algorithms/dp}/fib.py (100%) rename {dp => algorithms/dp}/house_robber.py (100%) rename {dp => algorithms/dp}/job_scheduling.py (100%) rename {dp => algorithms/dp}/knapsack.py (100%) rename {dp => algorithms/dp}/longest_increasing.py (100%) rename {dp => algorithms/dp}/matrix_chain_order.py (100%) rename {dp => algorithms/dp}/max_product_subarray.py (100%) rename {dp => algorithms/dp}/max_subarray.py (100%) rename {dp => algorithms/dp}/min_cost_path.py (100%) rename {dp => algorithms/dp}/num_decodings.py (100%) rename {dp => algorithms/dp}/regex_matching.py (100%) rename {dp => algorithms/dp}/rod_cut.py (100%) rename {dp => algorithms/dp}/word_break.py (100%) diff --git a/dp/buy_sell_stock.py b/algorithms/dp/buy_sell_stock.py similarity index 100% rename from dp/buy_sell_stock.py rename to algorithms/dp/buy_sell_stock.py diff --git a/dp/climbing_stairs.py b/algorithms/dp/climbing_stairs.py similarity index 100% rename from dp/climbing_stairs.py rename to algorithms/dp/climbing_stairs.py diff --git a/dp/coin_change.py b/algorithms/dp/coin_change.py similarity index 100% rename from dp/coin_change.py rename to algorithms/dp/coin_change.py diff --git a/dp/combination_sum.py b/algorithms/dp/combination_sum.py similarity index 100% rename from dp/combination_sum.py rename to algorithms/dp/combination_sum.py diff --git a/dp/egg_drop.py b/algorithms/dp/egg_drop.py similarity index 100% rename from dp/egg_drop.py rename to algorithms/dp/egg_drop.py diff --git a/dp/fib.py b/algorithms/dp/fib.py similarity index 100% rename from dp/fib.py rename to algorithms/dp/fib.py diff --git a/dp/house_robber.py b/algorithms/dp/house_robber.py similarity index 100% rename from dp/house_robber.py rename to algorithms/dp/house_robber.py diff --git a/dp/job_scheduling.py b/algorithms/dp/job_scheduling.py similarity index 100% rename from dp/job_scheduling.py rename to algorithms/dp/job_scheduling.py diff --git a/dp/knapsack.py b/algorithms/dp/knapsack.py similarity index 100% rename from dp/knapsack.py rename to algorithms/dp/knapsack.py diff --git a/dp/longest_increasing.py b/algorithms/dp/longest_increasing.py similarity index 100% rename from dp/longest_increasing.py rename to algorithms/dp/longest_increasing.py diff --git a/dp/matrix_chain_order.py b/algorithms/dp/matrix_chain_order.py similarity index 100% rename from dp/matrix_chain_order.py rename to algorithms/dp/matrix_chain_order.py diff --git a/dp/max_product_subarray.py b/algorithms/dp/max_product_subarray.py similarity index 100% rename from dp/max_product_subarray.py rename to algorithms/dp/max_product_subarray.py diff --git a/dp/max_subarray.py b/algorithms/dp/max_subarray.py similarity index 100% rename from dp/max_subarray.py rename to algorithms/dp/max_subarray.py diff --git a/dp/min_cost_path.py b/algorithms/dp/min_cost_path.py similarity index 100% rename from dp/min_cost_path.py rename to algorithms/dp/min_cost_path.py diff --git a/dp/num_decodings.py b/algorithms/dp/num_decodings.py similarity index 100% rename from dp/num_decodings.py rename to algorithms/dp/num_decodings.py diff --git a/dp/regex_matching.py b/algorithms/dp/regex_matching.py similarity index 100% rename from dp/regex_matching.py rename to algorithms/dp/regex_matching.py diff --git a/dp/rod_cut.py b/algorithms/dp/rod_cut.py similarity index 100% rename from dp/rod_cut.py rename to algorithms/dp/rod_cut.py diff --git a/dp/word_break.py b/algorithms/dp/word_break.py similarity index 100% rename from dp/word_break.py rename to algorithms/dp/word_break.py From f84a0d4c21c702adf6ff1363cee8ba0a70ef4081 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 14:28:37 -0700 Subject: [PATCH 290/387] reorganize graph --- {graph => algorithms/graph}/Transitive_Closure_DFS.py | 0 algorithms/graph/__init__.py | 1 + {graph => algorithms/graph}/checkDiGraphStronglyConnected.py | 0 {graph => algorithms/graph}/clone_graph.py | 0 {graph => algorithms/graph}/cycle_detection.py | 0 {graph => algorithms/graph}/dijkstra.py | 0 {graph => algorithms/graph}/find_all_cliques.py | 0 {graph => algorithms/graph}/find_path.py | 0 {graph => algorithms/graph}/graph.py | 0 {graph => algorithms/graph}/markov_chain.py | 0 {graph => algorithms/graph}/minimum_spanning_tree.py | 0 .../graph}/pathBetweenTwoVerticesInDiGraph.py | 0 {graph => algorithms/graph}/satisfiability.py | 0 {graph => algorithms/graph}/tarjan.py | 4 ++-- {graph => algorithms/graph}/traversal.py | 0 graph/__init__.py | 0 tests/test_graph.py | 4 ++-- 17 files changed, 5 insertions(+), 4 deletions(-) rename {graph => algorithms/graph}/Transitive_Closure_DFS.py (100%) create mode 100644 algorithms/graph/__init__.py rename {graph => algorithms/graph}/checkDiGraphStronglyConnected.py (100%) rename {graph => algorithms/graph}/clone_graph.py (100%) rename {graph => algorithms/graph}/cycle_detection.py (100%) rename {graph => algorithms/graph}/dijkstra.py (100%) rename {graph => algorithms/graph}/find_all_cliques.py (100%) rename {graph => algorithms/graph}/find_path.py (100%) rename {graph => algorithms/graph}/graph.py (100%) rename {graph => algorithms/graph}/markov_chain.py (100%) rename {graph => algorithms/graph}/minimum_spanning_tree.py (100%) rename {graph => algorithms/graph}/pathBetweenTwoVerticesInDiGraph.py (100%) rename {graph => algorithms/graph}/satisfiability.py (100%) rename {graph => algorithms/graph}/tarjan.py (97%) rename {graph => algorithms/graph}/traversal.py (100%) delete mode 100644 graph/__init__.py diff --git a/graph/Transitive_Closure_DFS.py b/algorithms/graph/Transitive_Closure_DFS.py similarity index 100% rename from graph/Transitive_Closure_DFS.py rename to algorithms/graph/Transitive_Closure_DFS.py diff --git a/algorithms/graph/__init__.py b/algorithms/graph/__init__.py new file mode 100644 index 000000000..bfb208eb0 --- /dev/null +++ b/algorithms/graph/__init__.py @@ -0,0 +1 @@ +from .tarjan import * diff --git a/graph/checkDiGraphStronglyConnected.py b/algorithms/graph/checkDiGraphStronglyConnected.py similarity index 100% rename from graph/checkDiGraphStronglyConnected.py rename to algorithms/graph/checkDiGraphStronglyConnected.py diff --git a/graph/clone_graph.py b/algorithms/graph/clone_graph.py similarity index 100% rename from graph/clone_graph.py rename to algorithms/graph/clone_graph.py diff --git a/graph/cycle_detection.py b/algorithms/graph/cycle_detection.py similarity index 100% rename from graph/cycle_detection.py rename to algorithms/graph/cycle_detection.py diff --git a/graph/dijkstra.py b/algorithms/graph/dijkstra.py similarity index 100% rename from graph/dijkstra.py rename to algorithms/graph/dijkstra.py diff --git a/graph/find_all_cliques.py b/algorithms/graph/find_all_cliques.py similarity index 100% rename from graph/find_all_cliques.py rename to algorithms/graph/find_all_cliques.py diff --git a/graph/find_path.py b/algorithms/graph/find_path.py similarity index 100% rename from graph/find_path.py rename to algorithms/graph/find_path.py diff --git a/graph/graph.py b/algorithms/graph/graph.py similarity index 100% rename from graph/graph.py rename to algorithms/graph/graph.py diff --git a/graph/markov_chain.py b/algorithms/graph/markov_chain.py similarity index 100% rename from graph/markov_chain.py rename to algorithms/graph/markov_chain.py diff --git a/graph/minimum_spanning_tree.py b/algorithms/graph/minimum_spanning_tree.py similarity index 100% rename from graph/minimum_spanning_tree.py rename to algorithms/graph/minimum_spanning_tree.py diff --git a/graph/pathBetweenTwoVerticesInDiGraph.py b/algorithms/graph/pathBetweenTwoVerticesInDiGraph.py similarity index 100% rename from graph/pathBetweenTwoVerticesInDiGraph.py rename to algorithms/graph/pathBetweenTwoVerticesInDiGraph.py diff --git a/graph/satisfiability.py b/algorithms/graph/satisfiability.py similarity index 100% rename from graph/satisfiability.py rename to algorithms/graph/satisfiability.py diff --git a/graph/tarjan.py b/algorithms/graph/tarjan.py similarity index 97% rename from graph/tarjan.py rename to algorithms/graph/tarjan.py index 584999b49..a2f44e58d 100644 --- a/graph/tarjan.py +++ b/algorithms/graph/tarjan.py @@ -3,7 +3,7 @@ in a graph. https://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm """ -from graph.graph import DirectedGraph +from algorithms.graph.graph import DirectedGraph class Tarjan(object): def __init__(self, dict_graph): @@ -54,4 +54,4 @@ def strongconnect(self, v, sccs): break scc.sort() sccs.append(scc) - \ No newline at end of file + diff --git a/graph/traversal.py b/algorithms/graph/traversal.py similarity index 100% rename from graph/traversal.py rename to algorithms/graph/traversal.py diff --git a/graph/__init__.py b/graph/__init__.py deleted file mode 100644 index e69de29bb..000000000 diff --git a/tests/test_graph.py b/tests/test_graph.py index e62a10226..63937db0e 100644 --- a/tests/test_graph.py +++ b/tests/test_graph.py @@ -1,4 +1,4 @@ -from graph.tarjan import Tarjan +from algorithms.graph import Tarjan import unittest @@ -41,4 +41,4 @@ def test_tarjan_example_2(self): } g = Tarjan(example) - self.assertEqual(g.sccs, [['A', 'B', 'E'], ['C', 'D'], ['F', 'G'], ['H']]) \ No newline at end of file + self.assertEqual(g.sccs, [['A', 'B', 'E'], ['C', 'D'], ['F', 'G'], ['H']]) From 7760d36639bb22a54d7913c3b49f01d744b44c6d Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 14:34:49 -0700 Subject: [PATCH 291/387] reorganize heap --- algorithms/heap/__init__.py | 3 +++ {heap => algorithms/heap}/binary_heap.py | 0 {heap => algorithms/heap}/merge_sorted_k_lists.py | 0 {heap => algorithms/heap}/skyline.py | 0 {heap => algorithms/heap}/sliding_window_max.py | 0 heap/__init__.py | 0 tests/test_heap.py | 8 +++++--- 7 files changed, 8 insertions(+), 3 deletions(-) create mode 100644 algorithms/heap/__init__.py rename {heap => algorithms/heap}/binary_heap.py (100%) rename {heap => algorithms/heap}/merge_sorted_k_lists.py (100%) rename {heap => algorithms/heap}/skyline.py (100%) rename {heap => algorithms/heap}/sliding_window_max.py (100%) delete mode 100644 heap/__init__.py diff --git a/algorithms/heap/__init__.py b/algorithms/heap/__init__.py new file mode 100644 index 000000000..3731b0ee9 --- /dev/null +++ b/algorithms/heap/__init__.py @@ -0,0 +1,3 @@ +from .binary_heap import * +from .skyline import * +from .sliding_window_max import * diff --git a/heap/binary_heap.py b/algorithms/heap/binary_heap.py similarity index 100% rename from heap/binary_heap.py rename to algorithms/heap/binary_heap.py diff --git a/heap/merge_sorted_k_lists.py b/algorithms/heap/merge_sorted_k_lists.py similarity index 100% rename from heap/merge_sorted_k_lists.py rename to algorithms/heap/merge_sorted_k_lists.py diff --git a/heap/skyline.py b/algorithms/heap/skyline.py similarity index 100% rename from heap/skyline.py rename to algorithms/heap/skyline.py diff --git a/heap/sliding_window_max.py b/algorithms/heap/sliding_window_max.py similarity index 100% rename from heap/sliding_window_max.py rename to algorithms/heap/sliding_window_max.py diff --git a/heap/__init__.py b/heap/__init__.py deleted file mode 100644 index e69de29bb..000000000 diff --git a/tests/test_heap.py b/tests/test_heap.py index c6f2c7e60..0925972dd 100644 --- a/tests/test_heap.py +++ b/tests/test_heap.py @@ -1,6 +1,8 @@ -from heap.binary_heap import BinaryHeap -from heap.skyline import get_skyline -from heap.sliding_window_max import max_sliding_window +from algorithms.heap import ( + BinaryHeap, + get_skyline, + max_sliding_window +) import unittest From feceb6c4912f36900cefb2da15e6bc6c3e31b4a4 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 14:36:17 -0700 Subject: [PATCH 292/387] reorganize map --- {map => algorithms/map}/hashtable.py | 0 {map => algorithms/map}/longest_common_subsequence.py | 0 {map => algorithms/map}/randomized_set.py | 0 {map => algorithms/map}/separate_chaining_hashtable.py | 0 {map => algorithms/map}/valid_sudoku.py | 0 5 files changed, 0 insertions(+), 0 deletions(-) rename {map => algorithms/map}/hashtable.py (100%) rename {map => algorithms/map}/longest_common_subsequence.py (100%) rename {map => algorithms/map}/randomized_set.py (100%) rename {map => algorithms/map}/separate_chaining_hashtable.py (100%) rename {map => algorithms/map}/valid_sudoku.py (100%) diff --git a/map/hashtable.py b/algorithms/map/hashtable.py similarity index 100% rename from map/hashtable.py rename to algorithms/map/hashtable.py diff --git a/map/longest_common_subsequence.py b/algorithms/map/longest_common_subsequence.py similarity index 100% rename from map/longest_common_subsequence.py rename to algorithms/map/longest_common_subsequence.py diff --git a/map/randomized_set.py b/algorithms/map/randomized_set.py similarity index 100% rename from map/randomized_set.py rename to algorithms/map/randomized_set.py diff --git a/map/separate_chaining_hashtable.py b/algorithms/map/separate_chaining_hashtable.py similarity index 100% rename from map/separate_chaining_hashtable.py rename to algorithms/map/separate_chaining_hashtable.py diff --git a/map/valid_sudoku.py b/algorithms/map/valid_sudoku.py similarity index 100% rename from map/valid_sudoku.py rename to algorithms/map/valid_sudoku.py From f9bb8a072f1b31310a8ab60d657abc491c00c523 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 14:40:58 -0700 Subject: [PATCH 293/387] reorganize maths --- algorithms/maths/__init__.py | 11 +++++++++ .../maths}/base_conversion.py | 0 {maths => algorithms/maths}/extended_gcd.py | 0 {maths => algorithms/maths}/gcd.py | 0 .../maths}/generate_strobogrammtic.py | 0 .../maths}/is_strobogrammatic.py | 0 {maths => algorithms/maths}/next_bigger.py | 0 .../maths}/next_perfect_square.py | 0 {maths => algorithms/maths}/nth_digit.py | 0 {maths => algorithms/maths}/prime_check.py | 0 .../maths}/primes_sieve_of_eratosthenes.py | 0 {maths => algorithms/maths}/pythagoras.py | 0 {maths => algorithms/maths}/rabin_miller.py | 0 {maths => algorithms/maths}/rsa.py | 0 .../maths}/sqrt_precision_factor.py | 0 {maths => algorithms/maths}/summing_digits.py | 0 maths/__init__.py | 0 tests/test_maths.py | 24 ++++++++++--------- 18 files changed, 24 insertions(+), 11 deletions(-) create mode 100644 algorithms/maths/__init__.py rename {maths => algorithms/maths}/base_conversion.py (100%) rename {maths => algorithms/maths}/extended_gcd.py (100%) rename {maths => algorithms/maths}/gcd.py (100%) rename {maths => algorithms/maths}/generate_strobogrammtic.py (100%) rename {maths => algorithms/maths}/is_strobogrammatic.py (100%) rename {maths => algorithms/maths}/next_bigger.py (100%) rename {maths => algorithms/maths}/next_perfect_square.py (100%) rename {maths => algorithms/maths}/nth_digit.py (100%) rename {maths => algorithms/maths}/prime_check.py (100%) rename {maths => algorithms/maths}/primes_sieve_of_eratosthenes.py (100%) rename {maths => algorithms/maths}/pythagoras.py (100%) rename {maths => algorithms/maths}/rabin_miller.py (100%) rename {maths => algorithms/maths}/rsa.py (100%) rename {maths => algorithms/maths}/sqrt_precision_factor.py (100%) rename {maths => algorithms/maths}/summing_digits.py (100%) delete mode 100644 maths/__init__.py diff --git a/algorithms/maths/__init__.py b/algorithms/maths/__init__.py new file mode 100644 index 000000000..6716384ba --- /dev/null +++ b/algorithms/maths/__init__.py @@ -0,0 +1,11 @@ +from .base_conversion import * +from .extended_gcd import * +from .gcd import * +from .generate_strobogrammtic import * +from .is_strobogrammatic import * +from .next_perfect_square import * +from .prime_check import * +from .primes_sieve_of_eratosthenes import * +from .pythagoras import * +from .rabin_miller import * +from .rsa import * diff --git a/maths/base_conversion.py b/algorithms/maths/base_conversion.py similarity index 100% rename from maths/base_conversion.py rename to algorithms/maths/base_conversion.py diff --git a/maths/extended_gcd.py b/algorithms/maths/extended_gcd.py similarity index 100% rename from maths/extended_gcd.py rename to algorithms/maths/extended_gcd.py diff --git a/maths/gcd.py b/algorithms/maths/gcd.py similarity index 100% rename from maths/gcd.py rename to algorithms/maths/gcd.py diff --git a/maths/generate_strobogrammtic.py b/algorithms/maths/generate_strobogrammtic.py similarity index 100% rename from maths/generate_strobogrammtic.py rename to algorithms/maths/generate_strobogrammtic.py diff --git a/maths/is_strobogrammatic.py b/algorithms/maths/is_strobogrammatic.py similarity index 100% rename from maths/is_strobogrammatic.py rename to algorithms/maths/is_strobogrammatic.py diff --git a/maths/next_bigger.py b/algorithms/maths/next_bigger.py similarity index 100% rename from maths/next_bigger.py rename to algorithms/maths/next_bigger.py diff --git a/maths/next_perfect_square.py b/algorithms/maths/next_perfect_square.py similarity index 100% rename from maths/next_perfect_square.py rename to algorithms/maths/next_perfect_square.py diff --git a/maths/nth_digit.py b/algorithms/maths/nth_digit.py similarity index 100% rename from maths/nth_digit.py rename to algorithms/maths/nth_digit.py diff --git a/maths/prime_check.py b/algorithms/maths/prime_check.py similarity index 100% rename from maths/prime_check.py rename to algorithms/maths/prime_check.py diff --git a/maths/primes_sieve_of_eratosthenes.py b/algorithms/maths/primes_sieve_of_eratosthenes.py similarity index 100% rename from maths/primes_sieve_of_eratosthenes.py rename to algorithms/maths/primes_sieve_of_eratosthenes.py diff --git a/maths/pythagoras.py b/algorithms/maths/pythagoras.py similarity index 100% rename from maths/pythagoras.py rename to algorithms/maths/pythagoras.py diff --git a/maths/rabin_miller.py b/algorithms/maths/rabin_miller.py similarity index 100% rename from maths/rabin_miller.py rename to algorithms/maths/rabin_miller.py diff --git a/maths/rsa.py b/algorithms/maths/rsa.py similarity index 100% rename from maths/rsa.py rename to algorithms/maths/rsa.py diff --git a/maths/sqrt_precision_factor.py b/algorithms/maths/sqrt_precision_factor.py similarity index 100% rename from maths/sqrt_precision_factor.py rename to algorithms/maths/sqrt_precision_factor.py diff --git a/maths/summing_digits.py b/algorithms/maths/summing_digits.py similarity index 100% rename from maths/summing_digits.py rename to algorithms/maths/summing_digits.py diff --git a/maths/__init__.py b/maths/__init__.py deleted file mode 100644 index e69de29bb..000000000 diff --git a/tests/test_maths.py b/tests/test_maths.py index a7567f72f..afafd2ec5 100644 --- a/tests/test_maths.py +++ b/tests/test_maths.py @@ -1,14 +1,16 @@ -from maths.base_conversion import int2base, base2int -from maths.extended_gcd import extended_gcd -from maths.gcd import gcd, lcm -from maths.generate_strobogrammtic import gen_strobogrammatic, strobogrammatic_in_range -from maths.is_strobogrammatic import is_strobogrammatic, is_strobogrammatic2 -from maths.next_perfect_square import find_next_square, find_next_square2 -from maths.prime_check import prime_check, prime_check2 -from maths.primes_sieve_of_eratosthenes import primes -from maths.pythagoras import pythagoras -from maths.rabin_miller import is_prime -from maths.rsa import encrypt, decrypt, generate_key +from algorithms.maths import ( + int2base, base2int, + extended_gcd, + gcd, lcm, + gen_strobogrammatic, strobogrammatic_in_range, + is_strobogrammatic, is_strobogrammatic2, + find_next_square, find_next_square2, + prime_check, prime_check2, + primes, + pythagoras, + is_prime, + encrypt, decrypt, generate_key +) import unittest From c611fdadefa458b149fd1e6b48bd78899c5a41d5 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 14:42:03 -0700 Subject: [PATCH 294/387] reorganize matrix --- {matrix => algorithms/matrix}/bomb_enemy.py | 0 {matrix => algorithms/matrix}/copy_transform.py | 0 {matrix => algorithms/matrix}/count_paths.py | 0 {matrix => algorithms/matrix}/matrix_rotation.txt | 0 {matrix => algorithms/matrix}/rotate_image.py | 0 {matrix => algorithms/matrix}/search_in_sorted_matrix.py | 0 {matrix => algorithms/matrix}/sparse_dot_vector.py | 0 {matrix => algorithms/matrix}/sparse_mul.py | 0 {matrix => algorithms/matrix}/spiral_traversal.py | 0 {matrix => algorithms/matrix}/sudoku_validator.py | 0 10 files changed, 0 insertions(+), 0 deletions(-) rename {matrix => algorithms/matrix}/bomb_enemy.py (100%) rename {matrix => algorithms/matrix}/copy_transform.py (100%) rename {matrix => algorithms/matrix}/count_paths.py (100%) rename {matrix => algorithms/matrix}/matrix_rotation.txt (100%) rename {matrix => algorithms/matrix}/rotate_image.py (100%) rename {matrix => algorithms/matrix}/search_in_sorted_matrix.py (100%) rename {matrix => algorithms/matrix}/sparse_dot_vector.py (100%) rename {matrix => algorithms/matrix}/sparse_mul.py (100%) rename {matrix => algorithms/matrix}/spiral_traversal.py (100%) rename {matrix => algorithms/matrix}/sudoku_validator.py (100%) diff --git a/matrix/bomb_enemy.py b/algorithms/matrix/bomb_enemy.py similarity index 100% rename from matrix/bomb_enemy.py rename to algorithms/matrix/bomb_enemy.py diff --git a/matrix/copy_transform.py b/algorithms/matrix/copy_transform.py similarity index 100% rename from matrix/copy_transform.py rename to algorithms/matrix/copy_transform.py diff --git a/matrix/count_paths.py b/algorithms/matrix/count_paths.py similarity index 100% rename from matrix/count_paths.py rename to algorithms/matrix/count_paths.py diff --git a/matrix/matrix_rotation.txt b/algorithms/matrix/matrix_rotation.txt similarity index 100% rename from matrix/matrix_rotation.txt rename to algorithms/matrix/matrix_rotation.txt diff --git a/matrix/rotate_image.py b/algorithms/matrix/rotate_image.py similarity index 100% rename from matrix/rotate_image.py rename to algorithms/matrix/rotate_image.py diff --git a/matrix/search_in_sorted_matrix.py b/algorithms/matrix/search_in_sorted_matrix.py similarity index 100% rename from matrix/search_in_sorted_matrix.py rename to algorithms/matrix/search_in_sorted_matrix.py diff --git a/matrix/sparse_dot_vector.py b/algorithms/matrix/sparse_dot_vector.py similarity index 100% rename from matrix/sparse_dot_vector.py rename to algorithms/matrix/sparse_dot_vector.py diff --git a/matrix/sparse_mul.py b/algorithms/matrix/sparse_mul.py similarity index 100% rename from matrix/sparse_mul.py rename to algorithms/matrix/sparse_mul.py diff --git a/matrix/spiral_traversal.py b/algorithms/matrix/spiral_traversal.py similarity index 100% rename from matrix/spiral_traversal.py rename to algorithms/matrix/spiral_traversal.py diff --git a/matrix/sudoku_validator.py b/algorithms/matrix/sudoku_validator.py similarity index 100% rename from matrix/sudoku_validator.py rename to algorithms/matrix/sudoku_validator.py From 000d6b3241028af48e199867c1cbc528578cd6a5 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 14:46:00 -0700 Subject: [PATCH 295/387] reorganize queue --- algorithms/queues/__init__.py | 4 ++++ {queues => algorithms/queues}/max_sliding_window.py | 0 {queues => algorithms/queues}/moving_average.py | 0 {queues => algorithms/queues}/priority_queue.py | 0 {queues => algorithms/queues}/queue.py | 0 {queues => algorithms/queues}/reconstruct_queue.py | 0 {queues => algorithms/queues}/zigzagiterator.py | 0 queues/__init__.py | 1 - tests/test_queues.py | 11 +++++++---- 9 files changed, 11 insertions(+), 5 deletions(-) create mode 100644 algorithms/queues/__init__.py rename {queues => algorithms/queues}/max_sliding_window.py (100%) rename {queues => algorithms/queues}/moving_average.py (100%) rename {queues => algorithms/queues}/priority_queue.py (100%) rename {queues => algorithms/queues}/queue.py (100%) rename {queues => algorithms/queues}/reconstruct_queue.py (100%) rename {queues => algorithms/queues}/zigzagiterator.py (100%) delete mode 100644 queues/__init__.py diff --git a/algorithms/queues/__init__.py b/algorithms/queues/__init__.py new file mode 100644 index 000000000..3c4f22ca0 --- /dev/null +++ b/algorithms/queues/__init__.py @@ -0,0 +1,4 @@ +from .queue import * +from .max_sliding_window import * +from .reconstruct_queue import * +from .priority_queue import * diff --git a/queues/max_sliding_window.py b/algorithms/queues/max_sliding_window.py similarity index 100% rename from queues/max_sliding_window.py rename to algorithms/queues/max_sliding_window.py diff --git a/queues/moving_average.py b/algorithms/queues/moving_average.py similarity index 100% rename from queues/moving_average.py rename to algorithms/queues/moving_average.py diff --git a/queues/priority_queue.py b/algorithms/queues/priority_queue.py similarity index 100% rename from queues/priority_queue.py rename to algorithms/queues/priority_queue.py diff --git a/queues/queue.py b/algorithms/queues/queue.py similarity index 100% rename from queues/queue.py rename to algorithms/queues/queue.py diff --git a/queues/reconstruct_queue.py b/algorithms/queues/reconstruct_queue.py similarity index 100% rename from queues/reconstruct_queue.py rename to algorithms/queues/reconstruct_queue.py diff --git a/queues/zigzagiterator.py b/algorithms/queues/zigzagiterator.py similarity index 100% rename from queues/zigzagiterator.py rename to algorithms/queues/zigzagiterator.py diff --git a/queues/__init__.py b/queues/__init__.py deleted file mode 100644 index 2b5cb8ad8..000000000 --- a/queues/__init__.py +++ /dev/null @@ -1 +0,0 @@ -from .queue import * diff --git a/tests/test_queues.py b/tests/test_queues.py index a37d95f43..e5a882abd 100644 --- a/tests/test_queues.py +++ b/tests/test_queues.py @@ -1,7 +1,10 @@ -from queues.queue import ArrayQueue, LinkedListQueue -from queues.max_sliding_window import max_sliding_window -from queues.reconstruct_queue import reconstruct_queue -from queues.priority_queue import PriorityQueue, PriorityQueueNode +from algorithms.queues import ( + ArrayQueue, LinkedListQueue, + max_sliding_window, + reconstruct_queue, + PriorityQueue, PriorityQueueNode +) + import unittest class TestQueue(unittest.TestCase): From d71bfe14ef13224f6a2659570555e16b47a40e60 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 14:50:30 -0700 Subject: [PATCH 296/387] reorganize search --- algorithms/search/__init__.py | 8 ++++++++ {search => algorithms/search}/binary_search.py | 0 .../search}/find_min_rotate.py | 0 .../search}/first_occurance.py | 0 .../search}/last_occurance.py | 0 {search => algorithms/search}/search_insert.py | 0 {search => algorithms/search}/search_range.py | 0 {search => algorithms/search}/search_rotate.py | 0 {search => algorithms/search}/two_sum.py | 0 search/__init__.py | 0 tests/test_search.py | 18 ++++++++++-------- 11 files changed, 18 insertions(+), 8 deletions(-) create mode 100644 algorithms/search/__init__.py rename {search => algorithms/search}/binary_search.py (100%) rename {search => algorithms/search}/find_min_rotate.py (100%) rename {search => algorithms/search}/first_occurance.py (100%) rename {search => algorithms/search}/last_occurance.py (100%) rename {search => algorithms/search}/search_insert.py (100%) rename {search => algorithms/search}/search_range.py (100%) rename {search => algorithms/search}/search_rotate.py (100%) rename {search => algorithms/search}/two_sum.py (100%) delete mode 100644 search/__init__.py diff --git a/algorithms/search/__init__.py b/algorithms/search/__init__.py new file mode 100644 index 000000000..cebea34fd --- /dev/null +++ b/algorithms/search/__init__.py @@ -0,0 +1,8 @@ +from .binary_search import * +from .first_occurance import * +from .last_occurance import * +from .search_insert import * +from .two_sum import * +from .search_range import * +from .find_min_rotate import * +from .search_rotate import * diff --git a/search/binary_search.py b/algorithms/search/binary_search.py similarity index 100% rename from search/binary_search.py rename to algorithms/search/binary_search.py diff --git a/search/find_min_rotate.py b/algorithms/search/find_min_rotate.py similarity index 100% rename from search/find_min_rotate.py rename to algorithms/search/find_min_rotate.py diff --git a/search/first_occurance.py b/algorithms/search/first_occurance.py similarity index 100% rename from search/first_occurance.py rename to algorithms/search/first_occurance.py diff --git a/search/last_occurance.py b/algorithms/search/last_occurance.py similarity index 100% rename from search/last_occurance.py rename to algorithms/search/last_occurance.py diff --git a/search/search_insert.py b/algorithms/search/search_insert.py similarity index 100% rename from search/search_insert.py rename to algorithms/search/search_insert.py diff --git a/search/search_range.py b/algorithms/search/search_range.py similarity index 100% rename from search/search_range.py rename to algorithms/search/search_range.py diff --git a/search/search_rotate.py b/algorithms/search/search_rotate.py similarity index 100% rename from search/search_rotate.py rename to algorithms/search/search_rotate.py diff --git a/search/two_sum.py b/algorithms/search/two_sum.py similarity index 100% rename from search/two_sum.py rename to algorithms/search/two_sum.py diff --git a/search/__init__.py b/search/__init__.py deleted file mode 100644 index e69de29bb..000000000 diff --git a/tests/test_search.py b/tests/test_search.py index ca55940fd..4567ec559 100644 --- a/tests/test_search.py +++ b/tests/test_search.py @@ -1,11 +1,13 @@ -from search.binary_search import binary_search, binary_search_recur -from search.first_occurance import first_occurance -from search.last_occurance import last_occurance -from search.search_insert import search_insert -from search.two_sum import two_sum, two_sum1, two_sum2 -from search.search_range import search_range -from search.find_min_rotate import find_min_rotate, find_min_rotate_recur -from search.search_rotate import search_rotate, search_rotate_recur +from algorithms.search import ( + binary_search, binary_search_recur, + first_occurance, + last_occurance, + search_insert, + two_sum, two_sum1, two_sum2, + search_range, + find_min_rotate, find_min_rotate_recur, + search_rotate, search_rotate_recur +) import unittest From c343b7a70957e9dcbdc51e7f514e1eedde1ff356 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 14:51:40 -0700 Subject: [PATCH 297/387] reorganize set --- {set => algorithms/set}/randomized_set.py | 0 {set => algorithms/set}/set_covering.py | 0 2 files changed, 0 insertions(+), 0 deletions(-) rename {set => algorithms/set}/randomized_set.py (100%) rename {set => algorithms/set}/set_covering.py (100%) diff --git a/set/randomized_set.py b/algorithms/set/randomized_set.py similarity index 100% rename from set/randomized_set.py rename to algorithms/set/randomized_set.py diff --git a/set/set_covering.py b/algorithms/set/set_covering.py similarity index 100% rename from set/set_covering.py rename to algorithms/set/set_covering.py From 5224102d4ad414a12b03c6bcb3c7a98818a89fb2 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 14:55:05 -0700 Subject: [PATCH 298/387] reorganize sort --- algorithms/sort/__init__.py | 8 ++++++++ {sort => algorithms/sort}/bubble_sort.py | 0 {sort => algorithms/sort}/comb_sort.py | 0 {sort => algorithms/sort}/counting_sort.py | 0 {sort => algorithms/sort}/heap_sort.py | 0 {sort => algorithms/sort}/insertion_sort.py | 0 {sort => algorithms/sort}/meeting_rooms.py | 0 {sort => algorithms/sort}/merge_sort.py | 0 {sort => algorithms/sort}/quick_sort.py | 0 {sort => algorithms/sort}/selection_sort.py | 0 {sort => algorithms/sort}/sort_colors.py | 0 {sort => algorithms/sort}/topsort.py | 0 {sort => algorithms/sort}/wiggle_sort.py | 0 sort/__init__.py | 0 tests/test_sort.py | 18 ++++++++++-------- 15 files changed, 18 insertions(+), 8 deletions(-) create mode 100644 algorithms/sort/__init__.py rename {sort => algorithms/sort}/bubble_sort.py (100%) rename {sort => algorithms/sort}/comb_sort.py (100%) rename {sort => algorithms/sort}/counting_sort.py (100%) rename {sort => algorithms/sort}/heap_sort.py (100%) rename {sort => algorithms/sort}/insertion_sort.py (100%) rename {sort => algorithms/sort}/meeting_rooms.py (100%) rename {sort => algorithms/sort}/merge_sort.py (100%) rename {sort => algorithms/sort}/quick_sort.py (100%) rename {sort => algorithms/sort}/selection_sort.py (100%) rename {sort => algorithms/sort}/sort_colors.py (100%) rename {sort => algorithms/sort}/topsort.py (100%) rename {sort => algorithms/sort}/wiggle_sort.py (100%) delete mode 100644 sort/__init__.py diff --git a/algorithms/sort/__init__.py b/algorithms/sort/__init__.py new file mode 100644 index 000000000..20a3cf326 --- /dev/null +++ b/algorithms/sort/__init__.py @@ -0,0 +1,8 @@ +from .bubble_sort import * +from .comb_sort import * +from .counting_sort import * +from .heap_sort import * +from .insertion_sort import * +from .merge_sort import * +from .quick_sort import * +from .selection_sort import * diff --git a/sort/bubble_sort.py b/algorithms/sort/bubble_sort.py similarity index 100% rename from sort/bubble_sort.py rename to algorithms/sort/bubble_sort.py diff --git a/sort/comb_sort.py b/algorithms/sort/comb_sort.py similarity index 100% rename from sort/comb_sort.py rename to algorithms/sort/comb_sort.py diff --git a/sort/counting_sort.py b/algorithms/sort/counting_sort.py similarity index 100% rename from sort/counting_sort.py rename to algorithms/sort/counting_sort.py diff --git a/sort/heap_sort.py b/algorithms/sort/heap_sort.py similarity index 100% rename from sort/heap_sort.py rename to algorithms/sort/heap_sort.py diff --git a/sort/insertion_sort.py b/algorithms/sort/insertion_sort.py similarity index 100% rename from sort/insertion_sort.py rename to algorithms/sort/insertion_sort.py diff --git a/sort/meeting_rooms.py b/algorithms/sort/meeting_rooms.py similarity index 100% rename from sort/meeting_rooms.py rename to algorithms/sort/meeting_rooms.py diff --git a/sort/merge_sort.py b/algorithms/sort/merge_sort.py similarity index 100% rename from sort/merge_sort.py rename to algorithms/sort/merge_sort.py diff --git a/sort/quick_sort.py b/algorithms/sort/quick_sort.py similarity index 100% rename from sort/quick_sort.py rename to algorithms/sort/quick_sort.py diff --git a/sort/selection_sort.py b/algorithms/sort/selection_sort.py similarity index 100% rename from sort/selection_sort.py rename to algorithms/sort/selection_sort.py diff --git a/sort/sort_colors.py b/algorithms/sort/sort_colors.py similarity index 100% rename from sort/sort_colors.py rename to algorithms/sort/sort_colors.py diff --git a/sort/topsort.py b/algorithms/sort/topsort.py similarity index 100% rename from sort/topsort.py rename to algorithms/sort/topsort.py diff --git a/sort/wiggle_sort.py b/algorithms/sort/wiggle_sort.py similarity index 100% rename from sort/wiggle_sort.py rename to algorithms/sort/wiggle_sort.py diff --git a/sort/__init__.py b/sort/__init__.py deleted file mode 100644 index e69de29bb..000000000 diff --git a/tests/test_sort.py b/tests/test_sort.py index 30f27621c..07d13c8f3 100644 --- a/tests/test_sort.py +++ b/tests/test_sort.py @@ -1,11 +1,13 @@ -from sort.bubble_sort import bubble_sort -from sort.comb_sort import comb_sort -from sort.counting_sort import counting_sort -from sort.heap_sort import max_heap_sort, min_heap_sort -from sort.insertion_sort import insertion_sort -from sort.merge_sort import merge_sort -from sort.quick_sort import quick_sort -from sort.selection_sort import selection_sort +from algorithms.sort import ( + bubble_sort, + comb_sort, + counting_sort, + max_heap_sort, min_heap_sort, + insertion_sort, + merge_sort, + quick_sort, + selection_sort +) import unittest From 0f0ff08a9952a8a690c200c3ef7e52edc381146f Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 15:01:24 -0700 Subject: [PATCH 299/387] reorganize stack --- algorithms/stack/__init__.py | 10 ++++++++++ {stack => algorithms/stack}/is_consecutive.py | 0 {stack => algorithms/stack}/is_sorted.py | 0 .../stack}/longest_abs_path.py | 0 {stack => algorithms/stack}/ordered_stack.py | 0 {stack => algorithms/stack}/remove_min.py | 0 {stack => algorithms/stack}/simplify_path.py | 0 {stack => algorithms/stack}/stack.py | 0 {stack => algorithms/stack}/stutter.py | 0 {stack => algorithms/stack}/switch_pairs.py | 0 .../stack}/valid_parenthesis.py | 0 stack/__init__.py | 1 - tests/test_stack.py | 20 ++++++++++--------- 13 files changed, 21 insertions(+), 10 deletions(-) create mode 100644 algorithms/stack/__init__.py rename {stack => algorithms/stack}/is_consecutive.py (100%) rename {stack => algorithms/stack}/is_sorted.py (100%) rename {stack => algorithms/stack}/longest_abs_path.py (100%) rename {stack => algorithms/stack}/ordered_stack.py (100%) rename {stack => algorithms/stack}/remove_min.py (100%) rename {stack => algorithms/stack}/simplify_path.py (100%) rename {stack => algorithms/stack}/stack.py (100%) rename {stack => algorithms/stack}/stutter.py (100%) rename {stack => algorithms/stack}/switch_pairs.py (100%) rename {stack => algorithms/stack}/valid_parenthesis.py (100%) delete mode 100644 stack/__init__.py diff --git a/algorithms/stack/__init__.py b/algorithms/stack/__init__.py new file mode 100644 index 000000000..4e8d0603f --- /dev/null +++ b/algorithms/stack/__init__.py @@ -0,0 +1,10 @@ +from .stack import * +from .is_consecutive import * +from .is_sorted import * +from .remove_min import * +from .stutter import * +from .switch_pairs import * +from .valid_parenthesis import * +from .simplify_path import * +from .stack import * +from .ordered_stack import * diff --git a/stack/is_consecutive.py b/algorithms/stack/is_consecutive.py similarity index 100% rename from stack/is_consecutive.py rename to algorithms/stack/is_consecutive.py diff --git a/stack/is_sorted.py b/algorithms/stack/is_sorted.py similarity index 100% rename from stack/is_sorted.py rename to algorithms/stack/is_sorted.py diff --git a/stack/longest_abs_path.py b/algorithms/stack/longest_abs_path.py similarity index 100% rename from stack/longest_abs_path.py rename to algorithms/stack/longest_abs_path.py diff --git a/stack/ordered_stack.py b/algorithms/stack/ordered_stack.py similarity index 100% rename from stack/ordered_stack.py rename to algorithms/stack/ordered_stack.py diff --git a/stack/remove_min.py b/algorithms/stack/remove_min.py similarity index 100% rename from stack/remove_min.py rename to algorithms/stack/remove_min.py diff --git a/stack/simplify_path.py b/algorithms/stack/simplify_path.py similarity index 100% rename from stack/simplify_path.py rename to algorithms/stack/simplify_path.py diff --git a/stack/stack.py b/algorithms/stack/stack.py similarity index 100% rename from stack/stack.py rename to algorithms/stack/stack.py diff --git a/stack/stutter.py b/algorithms/stack/stutter.py similarity index 100% rename from stack/stutter.py rename to algorithms/stack/stutter.py diff --git a/stack/switch_pairs.py b/algorithms/stack/switch_pairs.py similarity index 100% rename from stack/switch_pairs.py rename to algorithms/stack/switch_pairs.py diff --git a/stack/valid_parenthesis.py b/algorithms/stack/valid_parenthesis.py similarity index 100% rename from stack/valid_parenthesis.py rename to algorithms/stack/valid_parenthesis.py diff --git a/stack/__init__.py b/stack/__init__.py deleted file mode 100644 index 843a7582a..000000000 --- a/stack/__init__.py +++ /dev/null @@ -1 +0,0 @@ -from .stack import * diff --git a/tests/test_stack.py b/tests/test_stack.py index e3b85d414..d04b27f14 100644 --- a/tests/test_stack.py +++ b/tests/test_stack.py @@ -1,12 +1,14 @@ -from stack.is_consecutive import first_is_consecutive, second_is_consecutive -from stack.is_sorted import is_sorted -from stack.remove_min import remove_min -from stack.stutter import first_stutter, second_stutter -from stack.switch_pairs import first_switch_pairs, second_switch_pairs -from stack.valid_parenthesis import is_valid -from stack.simplify_path import simplify_path -from stack.stack import ArrayStack, LinkedListStack -from stack.ordered_stack import OrderedStack +from algorithms.stack import ( + first_is_consecutive, second_is_consecutive, + is_sorted, + remove_min, + first_stutter, second_stutter, + first_switch_pairs, second_switch_pairs, + is_valid, + simplify_path, + ArrayStack, LinkedListStack, + OrderedStack +) import unittest class TestSuite(unittest.TestCase): From 8fdc37b5630364f901a8fe3054054230fd7b8a95 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 15:18:43 -0700 Subject: [PATCH 300/387] reorganize strings --- algorithms/strings/__init__.py | 23 ++++++++ {strings => algorithms/strings}/add_binary.py | 0 .../strings}/breaking_bad.py | 0 .../strings}/decode_string.py | 0 .../strings}/delete_reoccurring.py | 0 .../strings}/domain_extractor.py | 0 .../strings}/encode_decode.py | 0 {strings => algorithms/strings}/fizzbuzz.py | 0 .../strings}/group_anagrams.py | 0 .../strings}/int_to_roman.py | 0 .../strings}/is_palindrome.py | 0 {strings => algorithms/strings}/is_rotated.py | 0 .../strings}/license_number.py | 0 .../strings}/make_sentence.py | 0 .../strings}/merge_string_checker.py | 0 .../strings}/multiply_strings.py | 0 .../strings}/one_edit_distance.py | 0 {strings => algorithms/strings}/rabin_karp.py | 0 .../strings}/reverse_string.py | 0 .../strings}/reverse_vowel.py | 0 .../strings}/reverse_words.py | 0 .../strings}/roman_to_int.py | 0 .../strings}/strip_url_params.py | 0 .../strings}/validate_coordinates.py | 0 .../strings}/word_squares.py | 0 tests/test_strings.py | 53 ++++++++++--------- 26 files changed, 51 insertions(+), 25 deletions(-) create mode 100644 algorithms/strings/__init__.py rename {strings => algorithms/strings}/add_binary.py (100%) rename {strings => algorithms/strings}/breaking_bad.py (100%) rename {strings => algorithms/strings}/decode_string.py (100%) rename {strings => algorithms/strings}/delete_reoccurring.py (100%) rename {strings => algorithms/strings}/domain_extractor.py (100%) rename {strings => algorithms/strings}/encode_decode.py (100%) rename {strings => algorithms/strings}/fizzbuzz.py (100%) rename {strings => algorithms/strings}/group_anagrams.py (100%) rename {strings => algorithms/strings}/int_to_roman.py (100%) rename {strings => algorithms/strings}/is_palindrome.py (100%) rename {strings => algorithms/strings}/is_rotated.py (100%) rename {strings => algorithms/strings}/license_number.py (100%) rename {strings => algorithms/strings}/make_sentence.py (100%) rename {strings => algorithms/strings}/merge_string_checker.py (100%) rename {strings => algorithms/strings}/multiply_strings.py (100%) rename {strings => algorithms/strings}/one_edit_distance.py (100%) rename {strings => algorithms/strings}/rabin_karp.py (100%) rename {strings => algorithms/strings}/reverse_string.py (100%) rename {strings => algorithms/strings}/reverse_vowel.py (100%) rename {strings => algorithms/strings}/reverse_words.py (100%) rename {strings => algorithms/strings}/roman_to_int.py (100%) rename {strings => algorithms/strings}/strip_url_params.py (100%) rename {strings => algorithms/strings}/validate_coordinates.py (100%) rename {strings => algorithms/strings}/word_squares.py (100%) diff --git a/algorithms/strings/__init__.py b/algorithms/strings/__init__.py new file mode 100644 index 000000000..b4d1bb4c0 --- /dev/null +++ b/algorithms/strings/__init__.py @@ -0,0 +1,23 @@ +from .add_binary import * +from .breaking_bad import * +from .decode_string import * +from .delete_reoccurring import * +from .domain_extractor import * +from .encode_decode import * +from .group_anagrams import * +from .int_to_roman import * +from .is_palindrome import * +from .is_rotated import * +from .license_number import * +from .make_sentence import * +from .merge_string_checker import * +from .multiply_strings import * +from .one_edit_distance import * +from .rabin_karp import * +from .reverse_string import * +from .reverse_vowel import * +from .reverse_words import * +from .roman_to_int import * +from .strip_url_params import * +from .validate_coordinates import * +from .word_squares import * diff --git a/strings/add_binary.py b/algorithms/strings/add_binary.py similarity index 100% rename from strings/add_binary.py rename to algorithms/strings/add_binary.py diff --git a/strings/breaking_bad.py b/algorithms/strings/breaking_bad.py similarity index 100% rename from strings/breaking_bad.py rename to algorithms/strings/breaking_bad.py diff --git a/strings/decode_string.py b/algorithms/strings/decode_string.py similarity index 100% rename from strings/decode_string.py rename to algorithms/strings/decode_string.py diff --git a/strings/delete_reoccurring.py b/algorithms/strings/delete_reoccurring.py similarity index 100% rename from strings/delete_reoccurring.py rename to algorithms/strings/delete_reoccurring.py diff --git a/strings/domain_extractor.py b/algorithms/strings/domain_extractor.py similarity index 100% rename from strings/domain_extractor.py rename to algorithms/strings/domain_extractor.py diff --git a/strings/encode_decode.py b/algorithms/strings/encode_decode.py similarity index 100% rename from strings/encode_decode.py rename to algorithms/strings/encode_decode.py diff --git a/strings/fizzbuzz.py b/algorithms/strings/fizzbuzz.py similarity index 100% rename from strings/fizzbuzz.py rename to algorithms/strings/fizzbuzz.py diff --git a/strings/group_anagrams.py b/algorithms/strings/group_anagrams.py similarity index 100% rename from strings/group_anagrams.py rename to algorithms/strings/group_anagrams.py diff --git a/strings/int_to_roman.py b/algorithms/strings/int_to_roman.py similarity index 100% rename from strings/int_to_roman.py rename to algorithms/strings/int_to_roman.py diff --git a/strings/is_palindrome.py b/algorithms/strings/is_palindrome.py similarity index 100% rename from strings/is_palindrome.py rename to algorithms/strings/is_palindrome.py diff --git a/strings/is_rotated.py b/algorithms/strings/is_rotated.py similarity index 100% rename from strings/is_rotated.py rename to algorithms/strings/is_rotated.py diff --git a/strings/license_number.py b/algorithms/strings/license_number.py similarity index 100% rename from strings/license_number.py rename to algorithms/strings/license_number.py diff --git a/strings/make_sentence.py b/algorithms/strings/make_sentence.py similarity index 100% rename from strings/make_sentence.py rename to algorithms/strings/make_sentence.py diff --git a/strings/merge_string_checker.py b/algorithms/strings/merge_string_checker.py similarity index 100% rename from strings/merge_string_checker.py rename to algorithms/strings/merge_string_checker.py diff --git a/strings/multiply_strings.py b/algorithms/strings/multiply_strings.py similarity index 100% rename from strings/multiply_strings.py rename to algorithms/strings/multiply_strings.py diff --git a/strings/one_edit_distance.py b/algorithms/strings/one_edit_distance.py similarity index 100% rename from strings/one_edit_distance.py rename to algorithms/strings/one_edit_distance.py diff --git a/strings/rabin_karp.py b/algorithms/strings/rabin_karp.py similarity index 100% rename from strings/rabin_karp.py rename to algorithms/strings/rabin_karp.py diff --git a/strings/reverse_string.py b/algorithms/strings/reverse_string.py similarity index 100% rename from strings/reverse_string.py rename to algorithms/strings/reverse_string.py diff --git a/strings/reverse_vowel.py b/algorithms/strings/reverse_vowel.py similarity index 100% rename from strings/reverse_vowel.py rename to algorithms/strings/reverse_vowel.py diff --git a/strings/reverse_words.py b/algorithms/strings/reverse_words.py similarity index 100% rename from strings/reverse_words.py rename to algorithms/strings/reverse_words.py diff --git a/strings/roman_to_int.py b/algorithms/strings/roman_to_int.py similarity index 100% rename from strings/roman_to_int.py rename to algorithms/strings/roman_to_int.py diff --git a/strings/strip_url_params.py b/algorithms/strings/strip_url_params.py similarity index 100% rename from strings/strip_url_params.py rename to algorithms/strings/strip_url_params.py diff --git a/strings/validate_coordinates.py b/algorithms/strings/validate_coordinates.py similarity index 100% rename from strings/validate_coordinates.py rename to algorithms/strings/validate_coordinates.py diff --git a/strings/word_squares.py b/algorithms/strings/word_squares.py similarity index 100% rename from strings/word_squares.py rename to algorithms/strings/word_squares.py diff --git a/tests/test_strings.py b/tests/test_strings.py index c0aa28334..31e0d3ed5 100644 --- a/tests/test_strings.py +++ b/tests/test_strings.py @@ -1,27 +1,30 @@ -from strings.add_binary import add_binary -from strings.breaking_bad import match_symbol, match_symbol_1, bracket -from strings.decode_string import decode_string -from strings.delete_reoccurring import delete_reoccurring_characters -from strings.domain_extractor import domain_name_1, domain_name_2 -from strings.encode_decode import encode, decode -from strings.group_anagrams import group_anagrams -from strings.int_to_roman import int_to_roman -from strings.is_palindrome import is_palindrome, is_palindrome_reverse, \ -is_palindrome_two_pointer, is_palindrome_stack -from strings.is_rotated import is_rotated -from strings.license_number import license_number -from strings.make_sentence import make_sentence -from strings.merge_string_checker import is_merge_recursive, is_merge_iterative -from strings.multiply_strings import multiply -from strings.one_edit_distance import is_one_edit, is_one_edit2 -from strings.rabin_karp import rabin_karp -from strings.reverse_string import * -from strings.reverse_vowel import reverse_vowel -from strings.reverse_words import reverse_words -from strings.roman_to_int import roman_to_int -from strings.strip_url_params import * -from strings.validate_coordinates import * -from strings.word_squares import word_squares +from algorithms.strings import ( + add_binary, + match_symbol, match_symbol_1, bracket, + decode_string, + delete_reoccurring_characters, + domain_name_1, domain_name_2, + encode, decode, + group_anagrams, + int_to_roman, + is_palindrome, is_palindrome_reverse, + is_palindrome_two_pointer, is_palindrome_stack, + is_rotated, + license_number, + make_sentence, + is_merge_recursive, is_merge_iterative, + multiply, + is_one_edit, is_one_edit2, + rabin_karp, + ultra_pythonic, iterative, recursive, pythonic, + reverse_vowel, + reverse_words, + roman_to_int, + strip_url_params1, strip_url_params2, strip_url_params3, + is_valid_coordinates_0, is_valid_coordinates_1, + is_valid_coordinates_regular_expression, + word_squares +) import unittest @@ -380,4 +383,4 @@ def test_word_squares(self): if __name__ == "__main__": - unittest.main() \ No newline at end of file + unittest.main() From a8545b37740258a87ec443c51c0e05c819e70101 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 15:29:30 -0700 Subject: [PATCH 301/387] reorganize bit --- algorithms/bit/__init__.py | 15 +++++++++ .../bit}/add_bitwise_operator.py | 0 {bit => algorithms/bit}/bit_operation.py | 0 .../bit}/bytes_int_conversion.py | 0 {bit => algorithms/bit}/count_ones.py | 0 {bit => algorithms/bit}/find_difference.py | 0 .../bit}/find_missing_number.py | 0 .../bit}/has_alternative_bit.py | 0 {bit => algorithms/bit}/insert_bit.py | 0 {bit => algorithms/bit}/power_of_two.py | 0 {bit => algorithms/bit}/remove_bit.py | 0 {bit => algorithms/bit}/reverse_bits.py | 0 {bit => algorithms/bit}/single_number.py | 0 {bit => algorithms/bit}/single_number2.py | 16 ---------- {bit => algorithms/bit}/single_number3.py | 0 {bit => algorithms/bit}/subsets.py | 0 {bit => algorithms/bit}/swap_pair.py | 0 bit/__init__.py | 0 tests/test_bit.py | 32 ++++++++++--------- 19 files changed, 32 insertions(+), 31 deletions(-) create mode 100644 algorithms/bit/__init__.py rename {bit => algorithms/bit}/add_bitwise_operator.py (100%) rename {bit => algorithms/bit}/bit_operation.py (100%) rename {bit => algorithms/bit}/bytes_int_conversion.py (100%) rename {bit => algorithms/bit}/count_ones.py (100%) rename {bit => algorithms/bit}/find_difference.py (100%) rename {bit => algorithms/bit}/find_missing_number.py (100%) rename {bit => algorithms/bit}/has_alternative_bit.py (100%) rename {bit => algorithms/bit}/insert_bit.py (100%) rename {bit => algorithms/bit}/power_of_two.py (100%) rename {bit => algorithms/bit}/remove_bit.py (100%) rename {bit => algorithms/bit}/reverse_bits.py (100%) rename {bit => algorithms/bit}/single_number.py (100%) rename {bit => algorithms/bit}/single_number2.py (71%) rename {bit => algorithms/bit}/single_number3.py (100%) rename {bit => algorithms/bit}/subsets.py (100%) rename {bit => algorithms/bit}/swap_pair.py (100%) delete mode 100644 bit/__init__.py diff --git a/algorithms/bit/__init__.py b/algorithms/bit/__init__.py new file mode 100644 index 000000000..7cd175f6a --- /dev/null +++ b/algorithms/bit/__init__.py @@ -0,0 +1,15 @@ +from .add_bitwise_operator import * +from .count_ones import * +from .find_missing_number import * +from .power_of_two import * +from .reverse_bits import * +from .single_number import * +from .single_number2 import * +from .single_number3 import * +from .subsets import * +from .bit_operation import * +from .swap_pair import * +from .find_difference import * +from .has_alternative_bit import * +from .insert_bit import * +from .remove_bit import * diff --git a/bit/add_bitwise_operator.py b/algorithms/bit/add_bitwise_operator.py similarity index 100% rename from bit/add_bitwise_operator.py rename to algorithms/bit/add_bitwise_operator.py diff --git a/bit/bit_operation.py b/algorithms/bit/bit_operation.py similarity index 100% rename from bit/bit_operation.py rename to algorithms/bit/bit_operation.py diff --git a/bit/bytes_int_conversion.py b/algorithms/bit/bytes_int_conversion.py similarity index 100% rename from bit/bytes_int_conversion.py rename to algorithms/bit/bytes_int_conversion.py diff --git a/bit/count_ones.py b/algorithms/bit/count_ones.py similarity index 100% rename from bit/count_ones.py rename to algorithms/bit/count_ones.py diff --git a/bit/find_difference.py b/algorithms/bit/find_difference.py similarity index 100% rename from bit/find_difference.py rename to algorithms/bit/find_difference.py diff --git a/bit/find_missing_number.py b/algorithms/bit/find_missing_number.py similarity index 100% rename from bit/find_missing_number.py rename to algorithms/bit/find_missing_number.py diff --git a/bit/has_alternative_bit.py b/algorithms/bit/has_alternative_bit.py similarity index 100% rename from bit/has_alternative_bit.py rename to algorithms/bit/has_alternative_bit.py diff --git a/bit/insert_bit.py b/algorithms/bit/insert_bit.py similarity index 100% rename from bit/insert_bit.py rename to algorithms/bit/insert_bit.py diff --git a/bit/power_of_two.py b/algorithms/bit/power_of_two.py similarity index 100% rename from bit/power_of_two.py rename to algorithms/bit/power_of_two.py diff --git a/bit/remove_bit.py b/algorithms/bit/remove_bit.py similarity index 100% rename from bit/remove_bit.py rename to algorithms/bit/remove_bit.py diff --git a/bit/reverse_bits.py b/algorithms/bit/reverse_bits.py similarity index 100% rename from bit/reverse_bits.py rename to algorithms/bit/reverse_bits.py diff --git a/bit/single_number.py b/algorithms/bit/single_number.py similarity index 100% rename from bit/single_number.py rename to algorithms/bit/single_number.py diff --git a/bit/single_number2.py b/algorithms/bit/single_number2.py similarity index 71% rename from bit/single_number2.py rename to algorithms/bit/single_number2.py index 9aff72cfe..2f0e36c59 100644 --- a/bit/single_number2.py +++ b/algorithms/bit/single_number2.py @@ -17,22 +17,6 @@ the remaining should be the exact bit of the single number. In this way, you get the 32 bits of the single number. """ -def single_number(nums): - """ - :type nums: List[int] - :rtype: int - """ - res = 0 - for i in range(0, 32): - count = 0 - for num in nums: - if (num >> i) & 1: - count += 1 - res |= ((count % 3) << i) - if res >= 2**31: - res -= 2**32 - return res - # Another awesome answer def single_number2(nums): diff --git a/bit/single_number3.py b/algorithms/bit/single_number3.py similarity index 100% rename from bit/single_number3.py rename to algorithms/bit/single_number3.py diff --git a/bit/subsets.py b/algorithms/bit/subsets.py similarity index 100% rename from bit/subsets.py rename to algorithms/bit/subsets.py diff --git a/bit/swap_pair.py b/algorithms/bit/swap_pair.py similarity index 100% rename from bit/swap_pair.py rename to algorithms/bit/swap_pair.py diff --git a/bit/__init__.py b/bit/__init__.py deleted file mode 100644 index e69de29bb..000000000 diff --git a/tests/test_bit.py b/tests/test_bit.py index 33d80d9b5..01290c2f3 100644 --- a/tests/test_bit.py +++ b/tests/test_bit.py @@ -1,18 +1,20 @@ -from bit.add_bitwise_operator import add_bitwise_operator -from bit.count_ones import count_ones_iter, count_ones_recur -from bit.find_missing_number import find_missing_number, find_missing_number2 -from bit.power_of_two import is_power_of_two -from bit.reverse_bits import reverse_bits -from bit.single_number import single_number -from bit.single_number2 import single_number2 -from bit.single_number3 import single_number3 -from bit.subsets import subsets -from bit.bit_operation import get_bit, set_bit, clear_bit, update_bit -from bit.swap_pair import swap_pair -from bit.find_difference import find_difference -from bit.has_alternative_bit import has_alternative_bit, has_alternative_bit_fast -from bit.insert_bit import insert_one_bit, insert_mult_bits -from bit.remove_bit import remove_bit +from algorithms.bit import ( + add_bitwise_operator, + count_ones_iter, count_ones_recur, + find_missing_number, find_missing_number2, + is_power_of_two, + reverse_bits, + single_number, + single_number2, + single_number3, + subsets, + get_bit, set_bit, clear_bit, update_bit, + swap_pair, + find_difference, + has_alternative_bit, has_alternative_bit_fast, + insert_one_bit, insert_mult_bits, + remove_bit +) import unittest import random From 844a50456627943ec9c55fd604cdb5316de41443 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 15:30:47 -0700 Subject: [PATCH 302/387] reorganize tree --- {tree => algorithms/tree}/avl/__init__.py | 0 {tree => algorithms/tree}/avl/avl.py | 0 {tree => algorithms/tree}/binary_tree_paths.py | 0 {tree => algorithms/tree}/bintree2list.py | 0 {tree => algorithms/tree}/bst/BSTIterator.py | 0 {tree => algorithms/tree}/bst/array2bst.py | 0 {tree => algorithms/tree}/bst/bst.py | 0 {tree => algorithms/tree}/bst/bst_closest_value.py | 0 {tree => algorithms/tree}/bst/count_left_node.py | 0 {tree => algorithms/tree}/bst/delete_node.py | 0 {tree => algorithms/tree}/bst/depth_sum.py | 0 {tree => algorithms/tree}/bst/height.py | 0 {tree => algorithms/tree}/bst/is_bst.py | 0 {tree => algorithms/tree}/bst/kth_smallest.py | 0 {tree => algorithms/tree}/bst/lowest_common_ancestor.py | 0 {tree => algorithms/tree}/bst/num_empty.py | 0 {tree => algorithms/tree}/bst/predecessor.py | 0 {tree => algorithms/tree}/bst/serialize_deserialize.py | 0 {tree => algorithms/tree}/bst/successor.py | 0 {tree => algorithms/tree}/bst/unique_bst.py | 0 {tree => algorithms/tree}/deepest_left.py | 0 {tree => algorithms/tree}/invert_tree.py | 0 {tree => algorithms/tree}/is_balanced.py | 0 {tree => algorithms/tree}/is_subtree.py | 0 {tree => algorithms/tree}/is_symmetric.py | 0 {tree => algorithms/tree}/longest_consecutive.py | 0 {tree => algorithms/tree}/lowest_common_ancestor.py | 0 {tree => algorithms/tree}/max_height.py | 0 {tree => algorithms/tree}/max_path_sum.py | 0 {tree => algorithms/tree}/min_height.py | 0 {tree => algorithms/tree}/path_sum.py | 0 {tree => algorithms/tree}/path_sum2.py | 0 {tree => algorithms/tree}/pretty_print.py | 0 {tree => algorithms/tree}/red_black_tree/red_black_tree.py | 0 {tree => algorithms/tree}/same_tree.py | 0 {tree => algorithms/tree}/segment_tree/segment_tree.py | 0 {tree => algorithms/tree}/traversal/inorder.py | 0 {tree => algorithms/tree}/traversal/level_order.py | 0 {tree => algorithms/tree}/traversal/zigzag.py | 0 {tree => algorithms/tree}/tree.py | 0 {tree => algorithms/tree}/trie/add_and_search.py | 0 {tree => algorithms/tree}/trie/trie.py | 0 42 files changed, 0 insertions(+), 0 deletions(-) rename {tree => algorithms/tree}/avl/__init__.py (100%) rename {tree => algorithms/tree}/avl/avl.py (100%) rename {tree => algorithms/tree}/binary_tree_paths.py (100%) rename {tree => algorithms/tree}/bintree2list.py (100%) rename {tree => algorithms/tree}/bst/BSTIterator.py (100%) rename {tree => algorithms/tree}/bst/array2bst.py (100%) rename {tree => algorithms/tree}/bst/bst.py (100%) rename {tree => algorithms/tree}/bst/bst_closest_value.py (100%) rename {tree => algorithms/tree}/bst/count_left_node.py (100%) rename {tree => algorithms/tree}/bst/delete_node.py (100%) rename {tree => algorithms/tree}/bst/depth_sum.py (100%) rename {tree => algorithms/tree}/bst/height.py (100%) rename {tree => algorithms/tree}/bst/is_bst.py (100%) rename {tree => algorithms/tree}/bst/kth_smallest.py (100%) rename {tree => algorithms/tree}/bst/lowest_common_ancestor.py (100%) rename {tree => algorithms/tree}/bst/num_empty.py (100%) rename {tree => algorithms/tree}/bst/predecessor.py (100%) rename {tree => algorithms/tree}/bst/serialize_deserialize.py (100%) rename {tree => algorithms/tree}/bst/successor.py (100%) rename {tree => algorithms/tree}/bst/unique_bst.py (100%) rename {tree => algorithms/tree}/deepest_left.py (100%) rename {tree => algorithms/tree}/invert_tree.py (100%) rename {tree => algorithms/tree}/is_balanced.py (100%) rename {tree => algorithms/tree}/is_subtree.py (100%) rename {tree => algorithms/tree}/is_symmetric.py (100%) rename {tree => algorithms/tree}/longest_consecutive.py (100%) rename {tree => algorithms/tree}/lowest_common_ancestor.py (100%) rename {tree => algorithms/tree}/max_height.py (100%) rename {tree => algorithms/tree}/max_path_sum.py (100%) rename {tree => algorithms/tree}/min_height.py (100%) rename {tree => algorithms/tree}/path_sum.py (100%) rename {tree => algorithms/tree}/path_sum2.py (100%) rename {tree => algorithms/tree}/pretty_print.py (100%) rename {tree => algorithms/tree}/red_black_tree/red_black_tree.py (100%) rename {tree => algorithms/tree}/same_tree.py (100%) rename {tree => algorithms/tree}/segment_tree/segment_tree.py (100%) rename {tree => algorithms/tree}/traversal/inorder.py (100%) rename {tree => algorithms/tree}/traversal/level_order.py (100%) rename {tree => algorithms/tree}/traversal/zigzag.py (100%) rename {tree => algorithms/tree}/tree.py (100%) rename {tree => algorithms/tree}/trie/add_and_search.py (100%) rename {tree => algorithms/tree}/trie/trie.py (100%) diff --git a/tree/avl/__init__.py b/algorithms/tree/avl/__init__.py similarity index 100% rename from tree/avl/__init__.py rename to algorithms/tree/avl/__init__.py diff --git a/tree/avl/avl.py b/algorithms/tree/avl/avl.py similarity index 100% rename from tree/avl/avl.py rename to algorithms/tree/avl/avl.py diff --git a/tree/binary_tree_paths.py b/algorithms/tree/binary_tree_paths.py similarity index 100% rename from tree/binary_tree_paths.py rename to algorithms/tree/binary_tree_paths.py diff --git a/tree/bintree2list.py b/algorithms/tree/bintree2list.py similarity index 100% rename from tree/bintree2list.py rename to algorithms/tree/bintree2list.py diff --git a/tree/bst/BSTIterator.py b/algorithms/tree/bst/BSTIterator.py similarity index 100% rename from tree/bst/BSTIterator.py rename to algorithms/tree/bst/BSTIterator.py diff --git a/tree/bst/array2bst.py b/algorithms/tree/bst/array2bst.py similarity index 100% rename from tree/bst/array2bst.py rename to algorithms/tree/bst/array2bst.py diff --git a/tree/bst/bst.py b/algorithms/tree/bst/bst.py similarity index 100% rename from tree/bst/bst.py rename to algorithms/tree/bst/bst.py diff --git a/tree/bst/bst_closest_value.py b/algorithms/tree/bst/bst_closest_value.py similarity index 100% rename from tree/bst/bst_closest_value.py rename to algorithms/tree/bst/bst_closest_value.py diff --git a/tree/bst/count_left_node.py b/algorithms/tree/bst/count_left_node.py similarity index 100% rename from tree/bst/count_left_node.py rename to algorithms/tree/bst/count_left_node.py diff --git a/tree/bst/delete_node.py b/algorithms/tree/bst/delete_node.py similarity index 100% rename from tree/bst/delete_node.py rename to algorithms/tree/bst/delete_node.py diff --git a/tree/bst/depth_sum.py b/algorithms/tree/bst/depth_sum.py similarity index 100% rename from tree/bst/depth_sum.py rename to algorithms/tree/bst/depth_sum.py diff --git a/tree/bst/height.py b/algorithms/tree/bst/height.py similarity index 100% rename from tree/bst/height.py rename to algorithms/tree/bst/height.py diff --git a/tree/bst/is_bst.py b/algorithms/tree/bst/is_bst.py similarity index 100% rename from tree/bst/is_bst.py rename to algorithms/tree/bst/is_bst.py diff --git a/tree/bst/kth_smallest.py b/algorithms/tree/bst/kth_smallest.py similarity index 100% rename from tree/bst/kth_smallest.py rename to algorithms/tree/bst/kth_smallest.py diff --git a/tree/bst/lowest_common_ancestor.py b/algorithms/tree/bst/lowest_common_ancestor.py similarity index 100% rename from tree/bst/lowest_common_ancestor.py rename to algorithms/tree/bst/lowest_common_ancestor.py diff --git a/tree/bst/num_empty.py b/algorithms/tree/bst/num_empty.py similarity index 100% rename from tree/bst/num_empty.py rename to algorithms/tree/bst/num_empty.py diff --git a/tree/bst/predecessor.py b/algorithms/tree/bst/predecessor.py similarity index 100% rename from tree/bst/predecessor.py rename to algorithms/tree/bst/predecessor.py diff --git a/tree/bst/serialize_deserialize.py b/algorithms/tree/bst/serialize_deserialize.py similarity index 100% rename from tree/bst/serialize_deserialize.py rename to algorithms/tree/bst/serialize_deserialize.py diff --git a/tree/bst/successor.py b/algorithms/tree/bst/successor.py similarity index 100% rename from tree/bst/successor.py rename to algorithms/tree/bst/successor.py diff --git a/tree/bst/unique_bst.py b/algorithms/tree/bst/unique_bst.py similarity index 100% rename from tree/bst/unique_bst.py rename to algorithms/tree/bst/unique_bst.py diff --git a/tree/deepest_left.py b/algorithms/tree/deepest_left.py similarity index 100% rename from tree/deepest_left.py rename to algorithms/tree/deepest_left.py diff --git a/tree/invert_tree.py b/algorithms/tree/invert_tree.py similarity index 100% rename from tree/invert_tree.py rename to algorithms/tree/invert_tree.py diff --git a/tree/is_balanced.py b/algorithms/tree/is_balanced.py similarity index 100% rename from tree/is_balanced.py rename to algorithms/tree/is_balanced.py diff --git a/tree/is_subtree.py b/algorithms/tree/is_subtree.py similarity index 100% rename from tree/is_subtree.py rename to algorithms/tree/is_subtree.py diff --git a/tree/is_symmetric.py b/algorithms/tree/is_symmetric.py similarity index 100% rename from tree/is_symmetric.py rename to algorithms/tree/is_symmetric.py diff --git a/tree/longest_consecutive.py b/algorithms/tree/longest_consecutive.py similarity index 100% rename from tree/longest_consecutive.py rename to algorithms/tree/longest_consecutive.py diff --git a/tree/lowest_common_ancestor.py b/algorithms/tree/lowest_common_ancestor.py similarity index 100% rename from tree/lowest_common_ancestor.py rename to algorithms/tree/lowest_common_ancestor.py diff --git a/tree/max_height.py b/algorithms/tree/max_height.py similarity index 100% rename from tree/max_height.py rename to algorithms/tree/max_height.py diff --git a/tree/max_path_sum.py b/algorithms/tree/max_path_sum.py similarity index 100% rename from tree/max_path_sum.py rename to algorithms/tree/max_path_sum.py diff --git a/tree/min_height.py b/algorithms/tree/min_height.py similarity index 100% rename from tree/min_height.py rename to algorithms/tree/min_height.py diff --git a/tree/path_sum.py b/algorithms/tree/path_sum.py similarity index 100% rename from tree/path_sum.py rename to algorithms/tree/path_sum.py diff --git a/tree/path_sum2.py b/algorithms/tree/path_sum2.py similarity index 100% rename from tree/path_sum2.py rename to algorithms/tree/path_sum2.py diff --git a/tree/pretty_print.py b/algorithms/tree/pretty_print.py similarity index 100% rename from tree/pretty_print.py rename to algorithms/tree/pretty_print.py diff --git a/tree/red_black_tree/red_black_tree.py b/algorithms/tree/red_black_tree/red_black_tree.py similarity index 100% rename from tree/red_black_tree/red_black_tree.py rename to algorithms/tree/red_black_tree/red_black_tree.py diff --git a/tree/same_tree.py b/algorithms/tree/same_tree.py similarity index 100% rename from tree/same_tree.py rename to algorithms/tree/same_tree.py diff --git a/tree/segment_tree/segment_tree.py b/algorithms/tree/segment_tree/segment_tree.py similarity index 100% rename from tree/segment_tree/segment_tree.py rename to algorithms/tree/segment_tree/segment_tree.py diff --git a/tree/traversal/inorder.py b/algorithms/tree/traversal/inorder.py similarity index 100% rename from tree/traversal/inorder.py rename to algorithms/tree/traversal/inorder.py diff --git a/tree/traversal/level_order.py b/algorithms/tree/traversal/level_order.py similarity index 100% rename from tree/traversal/level_order.py rename to algorithms/tree/traversal/level_order.py diff --git a/tree/traversal/zigzag.py b/algorithms/tree/traversal/zigzag.py similarity index 100% rename from tree/traversal/zigzag.py rename to algorithms/tree/traversal/zigzag.py diff --git a/tree/tree.py b/algorithms/tree/tree.py similarity index 100% rename from tree/tree.py rename to algorithms/tree/tree.py diff --git a/tree/trie/add_and_search.py b/algorithms/tree/trie/add_and_search.py similarity index 100% rename from tree/trie/add_and_search.py rename to algorithms/tree/trie/add_and_search.py diff --git a/tree/trie/trie.py b/algorithms/tree/trie/trie.py similarity index 100% rename from tree/trie/trie.py rename to algorithms/tree/trie/trie.py From e584a1d093117d87da1f7ced2c528383a1e5ffe4 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 15:31:55 -0700 Subject: [PATCH 303/387] reorganize other files --- {calculator => algorithms/calculator}/math_parser.py | 0 {union-find => algorithms/union-find}/count_islands.py | 0 2 files changed, 0 insertions(+), 0 deletions(-) rename {calculator => algorithms/calculator}/math_parser.py (100%) rename {union-find => algorithms/union-find}/count_islands.py (100%) diff --git a/calculator/math_parser.py b/algorithms/calculator/math_parser.py similarity index 100% rename from calculator/math_parser.py rename to algorithms/calculator/math_parser.py diff --git a/union-find/count_islands.py b/algorithms/union-find/count_islands.py similarity index 100% rename from union-find/count_islands.py rename to algorithms/union-find/count_islands.py From 4e1ecd16249a86623b5e58cf7c79cab3899f6ac4 Mon Sep 17 00:00:00 2001 From: danghai Date: Tue, 29 May 2018 15:43:22 -0700 Subject: [PATCH 304/387] README.md: Update python packaging following reorganize --- README.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index fce6c05a3..1f518e63e 100644 --- a/README.md +++ b/README.md @@ -37,11 +37,11 @@ If you want to use the API algorithms in your code, it is as simple as: You can test by creating a python file: (Ex: use `merge_sort` in `sort`) ```python3 -from sort import merge_sort +from algorithms.sort import merge_sort if __name__ == "__main__": my_list = [1, 8, 3, 5, 6] - my_list = merge_sort.merge_sort(my_list) + my_list = merge_sort(my_list) print(my_list) ``` From 343e3984f23f73a9bddca412337e8cb0a8b1d7a2 Mon Sep 17 00:00:00 2001 From: Lee Geon Date: Wed, 30 May 2018 23:40:50 +0900 Subject: [PATCH 305/387] Created README and CONTRIBUTING files in Japanese (#289) * Create CONTRIBUTING_JP.md * Create README_JP.md * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_JP.md --- CONTRIBUTING_JP.md | 61 +++++++++ README.md | 2 +- README_CN.md | 2 +- README_GE.md | 2 +- README_JP.md | 317 +++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 381 insertions(+), 3 deletions(-) create mode 100644 CONTRIBUTING_JP.md create mode 100644 README_JP.md diff --git a/CONTRIBUTING_JP.md b/CONTRIBUTING_JP.md new file mode 100644 index 000000000..a8e46c238 --- /dev/null +++ b/CONTRIBUTING_JP.md @@ -0,0 +1,61 @@ +# 貢献 + +私たちは、誰からもプルリクエストを歓迎します。このレポジトリに貢献をするためには[Code of Conduct](CODE_OF_CONDUCT.md)を従うことを同意しなければなりません。 + +## 始める + +* まずリポジトリを[フォーク][fork]し,次を使用してクローンします. + + git clone git@github.com:your-username/algorithms.git + +* その後,変更のためのブランチを作成します. 例えば： + * add_XXX : 新しいアルゴリズムやデータ構造を追加する場合 + * fix_XXX : 特定のアルゴリズムやデータ構造のbugを修正する場合 + * test_XXX : テストを作成する場合 + +以下の方法で貢献できます: +- レポジトリの新しいアルゴリズムを開発すること。 正しいセクションに保存してください(例: [array](array), [dp](dp), 等)。 どのセクションにも該当しない場合は、新しいセクションを作成します。 また、コードが正常に作動するかどうか確認してください。 +- 既存のアルゴリズムの最適化または改善。 +- 問題の他のソリューションを追加。 +- バグの検索と修正。 +- アルゴリズムをよりよく説明するための例を追加。 +- テストケースの追加。 + +## プルリクエスト +フォークにプッシュして[プルリクエストを送信します][pr]。 + +私たちは、検討した後、変更、改善、代替案を提案することもできます。 +あなたのプルリクエストが受け入れられる可能性が高くなる方法： + +* すべてのアルゴリズムは**Python 3**で開発されなければなりません。 +(まだPython 2で作成されたアルゴリズムがいくつかあります。これらをPython 3に転換する作業でスタートすることもできます。) +* きれいで理解しやすいコードを作成する。 +* コードに適切なコメントを残して[docstrings][docstr]にアルゴリズムが何をしているのか簡単に説明する。 +* 小さな例を通じて出力を説明する。 +* アルゴリズムのテストケースをいくつか含ませる。 +* [good commit message][commit]を書く。 + + +## イシュー +追加するアルゴリズムがあったり、既存のアルゴリズムにバグが発見された場合の[new issue][newissue]を提出してください。 新たなイシューを提出する前に重複を避けるために、[existing issues][issues]を確認してください。 また、現在のイシューを解決したり論議中のイシューに貢献することも考慮してください。 + +## コラボレータ +コラボレータには,どのようなヘルプや説明も求めることができます. + +[Keon Kim](https://github.com/keon) + +[Rahul Goswami](https://github.com/goswami-rahul) + +[Ankit Agarwal](https://github.com/ankit167) + +[Hai Hoang Dang](https://github.com/danghai) + +[Saad](https://github.com/SaadBenn) + +[fork]: https://help.github.com/articles/fork-a-repo/ +[docstr]: https://www.python.org/dev/peps/pep-0257/#multi-line-docstrings +[commit]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html +[pr]: https://github.com/keon/algorithms/compare/ +[newissue]: https://github.com/keon/algorithms/issues/new +[issue120]: https://github.com/keon/algorithms/issues/120 +[issues]: https://github.com/keon/algorithms/issues/ diff --git a/README.md b/README.md index fce6c05a3..4848622f2 100644 --- a/README.md +++ b/README.md @@ -1,4 +1,4 @@ -English | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) | [Deutsch](README_GE.md) +English | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) [![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) diff --git a/README_CN.md b/README_CN.md index c612cd522..dac345276 100644 --- a/README_CN.md +++ b/README_CN.md @@ -1,4 +1,4 @@ -[English](https://github.com/yunshuipiao/algorithms/blob/master/README.md) | 简体中文 +[English](https://github.com/yunshuipiao/algorithms/blob/master/README.md) | 简体中文 | [日本語](README_JP.md) Python版数据结构和算法 ========================================= diff --git a/README_GE.md b/README_GE.md index af1b8b2c4..cb36b22a7 100644 --- a/README_GE.md +++ b/README_GE.md @@ -1,4 +1,4 @@ -[English](README.md) | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) | Deutsch +[English](README.md) | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) | Deutsch | [日本語](README_JP.md) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) [![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) diff --git a/README_JP.md b/README_JP.md new file mode 100644 index 000000000..352d728fe --- /dev/null +++ b/README_JP.md @@ -0,0 +1,317 @@ +[English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 日本語 + +pythonのデータ構造とアルゴリズム +========================================= + +Python 3で開発された簡単で明確なデータ構造とアルゴリズムの例を紹介します。 + +## 貢献 +貢献に興味を持っていただきありがとうございます。 このプロジェクトに貢献する方法はたくさんあります。 + +[簡単にコミュニティへ貢献するには](CONTRIBUTING_JP.md) + +## テスト + +### unittestを使用 +すべてのテストを実行するには： + + $ python3 -m unittest discover tests + +特定のテストを実行するためには、（例: ソート）： + + $ python3 -m unittest tests.test_sort + +### pytestを使用 +すべてのテストを実行するには： + + $ python3 -m pytest tests + +## インストール +自分のコードでAPIアルゴリズムを活用したい場合は、以下のコードで簡単に実行することができます。 + + $ pip3 install git+https://github.com/keon/algorithms + +Pythonファイルを作成してテストを行うことができます：（例：「sort」の「merge_sort」を使用） + +```python3 +from sort import merge_sort + +if __name__ == "__main__": + my_list = [1, 8, 3, 5, 6] + my_list = merge_sort.merge_sort(my_list) + print(my_list) +``` + +## 削除 +アルゴリズムを削除する場合は、次のコードで簡単に実行することができます： + + $ pip3 uninstall -y algorithms + +## アルゴリズムのリスト + +- [arrays : 配列](arrays) + - [delete_nth](arrays/delete_nth.py) + - [flatten](arrays/flatten.py) + - [garage](arrays/garage.py) + - [josephus_problem](arrays/josephus_problem.py) + - [longest_non_repeat](arrays/longest_non_repeat.py/) + - [merge_intervals](arrays/merge_intervals.py) + - [missing_ranges](arrays/missing_ranges.py) + - [plus_one](arrays/plus_one.py) + - [rotate_array](arrays/rotate_array.py) + - [summary_ranges](arrays/summary_ranges.py) + - [three_sum](arrays/three_sum.py) + - [two_sum](arrays/two_sum.py) + - [move_zeros_to_end](arrays/move_zeros_to_end.py) +- [backtrack : バックトラッキング](backtrack) + - [general_solution.md](backtrack/) + - [anagram](backtrack/anagram.py) + - [array_sum_combinations](backtrack/array_sum_combinations.py) + - [combination_sum](backtrack/combination_sum.py) + - [expression_add_operators](backtrack/expression_add_operators.py) + - [factor_combinations](backtrack/factor_combinations.py) + - [generate_abbreviations](backtrack/generate_abbreviations.py) + - [generate_parenthesis](backtrack/generate_parenthesis.py) + - [letter_combination](backtrack/letter_combination.py) + - [palindrome_partitioning](backtrack/palindrome_partitioning.py) + - [pattern_match](backtrack/pattern_match.py) + - [permute](backtrack/permute.py) + - [permute_unique](backtrack/permute_unique.py) + - [subsets](backtrack/subsets.py) + - [subsets_unique](backtrack/subsets_unique.py) +- [bfs : 幅優先探索](bfs) + - [shortest_distance_from_all_buildings](bfs/shortest_distance_from_all_buildings.py) + - [word_ladder](bfs/word_ladder.py) +- [bit : ビット](bit) + - [bytes_int_conversion](bit/bytes_int_conversion.py) + - [count_ones](bit/count_ones.py) + - [find_missing_number](bit/find_missing_number.py) + - [power_of_two](bit/power_of_two.py) + - [reverse_bits](bit/reverse_bits.py) + - [single_number](bit/single_number.py) + - [single_number2](bit/single_number2.py) + - [single_number3](bit/single_number3.py) + - [subsets](bit/subsets.py) + - [add_bitwise_operator](bit/add_bitwise_operator.py) + - [bit_operation](bit/bit_operation.py) + - [swap_pair](bit/swap_pair.py) + - [find_difference](bit/find_difference.py) + - [has_alternative_bit](bit/has_alternative_bit.py) + - [insert_bit](bit/insert_bit.py) + - [remove_bit](bit/remove_bit.py) +- [calculator : 計算機](calculator) + - [math_parser](calculator/math_parser.py) +- [dfs : 深さ優先探索](dfs) + - [all_factors](dfs/all_factors.py) + - [count_islands](dfs/count_islands.py) + - [pacific_atlantic](dfs/pacific_atlantic.py) + - [sudoku_solver](dfs/sudoku_solver.py) + - [walls_and_gates](dfs/walls_and_gates.py) +- [dp : 動的計画法](dp) + - [buy_sell_stock](dp/buy_sell_stock.py) + - [climbing_stairs](dp/climbing_stairs.py) + - [coin_change](dp/coin_change.py) + - [combination_sum](dp/combination_sum.py) + - [egg_drop](dp/egg_drop.py) + - [house_robber](dp/house_robber.py) + - [job_scheduling](dp/job_scheduling.py) + - [knapsack](dp/knapsack.py) + - [longest_increasing](dp/longest_increasing.py) + - [matrix_chain_order](dp/matrix_chain_order.py) + - [max_product_subarray](dp/max_product_subarray.py) + - [max_subarray](dp/max_subarray.py) + - [min_cost_path](dp/min_cost_path.py) + - [num_decodings](dp/num_decodings.py) + - [regex_matching](dp/regex_matching.py) + - [rod_cut](dp/rod_cut.py) + - [word_break](dp/word_break.py) + - [fibonacci](dp/fib.py) +- [graph : グラフ](graph) + - [strongly_connected](graph/checkDiGraphStronglyConnected.py) + - [clone_graph](graph/clone_graph.py) + - [cycle_detection](graph/cycle_detection.py) + - [find_all_cliques](graph/find_all_cliques.py) + - [find_path](graph/find_path.py) + - [graph](graph/graph.py) + - [markov_chain](graph/markov_chain.py) + - [minimum_spanning_tree](graph/minimum_spanning_tree.py) + - [satisfiability](graph/satisfiability.py) + - [tarjan](graph/tarjan.py) + - [traversal](graph/traversal.py) +- [heap : ヒープ](heap) + - [merge_sorted_k_lists](heap/merge_sorted_k_lists.py) + - [skyline](heap/skyline.py) + - [sliding_window_max](heap/sliding_window_max.py) + - [binary_heap](heap/binary_heap.py) +- [linkedlist : 連結リスト](linkedlist) + - [add_two_numbers](linkedlist/add_two_numbers.py) + - [copy_random_pointer](linkedlist/copy_random_pointer.py) + - [delete_node](linkedlist/delete_node.py) + - [first_cyclic_node](linkedlist/first_cyclic_node.py) + - [is_cyclic](linkedlist/is_cyclic.py) + - [is_palindrome](linkedlist/is_palindrome.py) + - [kth_to_last](linkedlist/kth_to_last.py) + - [linkedlist](linkedlist/linkedlist.py) + - [remove_duplicates](linkedlist/remove_duplicates.py) + - [reverse](linkedlist/reverse.py) + - [rotate_list](linkedlist/rotate_list.py) + - [swap_in_pairs](linkedlist/swap_in_pairs.py) + - [is_sorted](linkedlist/is_sorted.py) + - [remove_range](linkedlist/remove_range.py) +- [map : マップ](map) + - [hashtable](map/hashtable.py) + - [separate_chaining_hashtable](map/separate_chaining_hashtable.py) + - [longest_common_subsequence](map/longest_common_subsequence.py) + - [randomized_set](map/randomized_set.py) + - [valid_sudoku](map/valid_sudoku.py) +- [maths : 数学](maths) + - [base_conversion](maths/base_conversion.py) + - [extended_gcd](maths/extended_gcd.py) + - [gcd/lcm](maths/gcd.py) + - [generate_strobogrammtic](maths/generate_strobogrammtic.py) + - [is_strobogrammatic](maths/is_strobogrammatic.py) + - [next_bigger](maths/next_bigger.py) + - [next_perfect_square](maths/next_perfect_square.py) + - [nth_digit](maths/nth_digit.py) + - [prime_check](maths/prime_check.py) + - [primes_sieve_of_eratosthenes](maths/primes_sieve_of_eratosthenes.py) + - [pythagoras](maths/pythagoras.py) + - [rabin_miller](maths/rabin_miller.py) + - [rsa](maths/rsa.py) + - [sqrt_precision_factor](maths/sqrt_precision_factor.py) + - [summing_digits](maths/summing_digits.py) +- [matrix : 行列](matrix) + - [sudoku_validator](matrix/sudoku_validator.py) + - [bomb_enemy](matrix/bomb_enemy.py) + - [copy_transform](matrix/copy_transform.py) + - [count_paths](matrix/count_paths.py) + - [matrix_rotation.txt](matrix/matrix_rotation.txt) + - [rotate_image](matrix/rotate_image.py) + - [search_in_sorted_matrix](matrix/search_in_sorted_matrix.py) + - [sparse_dot_vector](matrix/sparse_dot_vector.py) + - [sparse_mul](matrix/sparse_mul.py) + - [spiral_traversal](matrix/spiral_traversal.py) +- [queues : キュー](queues) + - [max_sliding_window](queues/max_sliding_window.py) + - [moving_average](queues/moving_average.py) + - [queue](queues/queue.py) + - [reconstruct_queue](queues/reconstruct_queue.py) + - [zigzagiterator](queues/zigzagiterator.py) +- [search : サーチ](search) + - [binary_search](search/binary_search.py) + - [first_occurance](search/first_occurance.py) + - [last_occurance](search/last_occurance.py) + - [search_insert](search/search_insert.py) + - [two_sum](search/two_sum.py) + - [search_range](search/search_range.py) + - [find_min_rotate](search/find_min_rotate.py) + - [search_rotate](search/search_rotate.py) +- [set : セット](set) + - [randomized_set](set/randomized_set.py) + - [set_covering](set/set_covering.py) +- [sort : ソート](sort) + - [bubble_sort](sort/bubble_sort.py) + - [comb_sort](sort/comb_sort.py) + - [counting_sort](sort/counting_sort.py) + - [heap_sort](sort/heap_sort.py) + - [insertion_sort](sort/insertion_sort.py) + - [meeting_rooms](sort/meeting_rooms.py) + - [merge_sort](sort/merge_sort.py) + - [quick_sort](sort/quick_sort.py) + - [selection_sort](sort/selection_sort.py) + - [sort_colors](sort/sort_colors.py) + - [topsort](sort/topsort.py) + - [wiggle_sort](sort/wiggle_sort.py) +- [stack : スタック](stack) + - [longest_abs_path](stack/longest_abs_path.py) + - [simplify_path](stack/simplify_path.py) + - [stack](stack/stack.py) + - [valid_parenthesis](stack/valid_parenthesis.py) + - [stutter](stack/stutter.py) + - [switch_pairs](stack/switch_pairs.py) + - [is_consecutive](stack/is_consecutive.py) + - [remove_min](stack/remove_min.py) + - [is_sorted](stack/is_sorted.py) +- [strings : 文字列](strings) + - [fizzbuzz](strings/fizzbuzz.py) + - [delete_reoccurring_characters](strings/delete_reoccurring_characters.py) + - [strip_url_params](strings/strip_url_params.py) + - [validate_coordinates](strings/validate_coordinates.py) + - [domain_extractor](strings/domain_extractor.py) + - [merge_string_checker](strings/merge_string_checker.py) + - [add_binary](strings/add_binary.py) + - [breaking_bad](strings/breaking_bad.py) + - [decode_string](strings/decode_string.py) + - [encode_decode](strings/encode_decode.py) + - [group_anagrams](strings/group_anagrams.py) + - [int_to_roman](strings/int_to_roman.py) + - [is_palindrome](strings/is_palindrome.py) + - [license_number](strings/license_number.py) + - [make_sentence](strings/make_sentence.py) + - [multiply_strings](strings/multiply_strings.py) + - [one_edit_distance](strings/one_edit_distance.py) + - [rabin_karp](strings/rabin_karp.py) + - [reverse_string](strings/reverse_string.py) + - [reverse_vowel](strings/reverse_vowel.py) + - [reverse_words](strings/reverse_words.py) + - [roman_to_int](strings/roman_to_int.py) + - [word_squares](strings/word_squares.py) +- [tree : 木構造](tree) + - [bst](tree/tree/bst) + - [array2bst](tree/bst/array2bst.py) + - [bst_closest_value](tree/bst/bst_closest_value.py) + - [BSTIterator](tree/bst/BSTIterator.py) + - [delete_node](tree/bst/delete_node.py) + - [is_bst](tree/bst/is_bst.py) + - [kth_smallest](tree/bst/kth_smallest.py) + - [lowest_common_ancestor](tree/bst/lowest_common_ancestor.py) + - [predecessor](tree/bst/predecessor.py) + - [serialize_deserialize](tree/bst/serialize_deserialize.py) + - [successor](tree/bst/successor.py) + - [unique_bst](tree/bst/unique_bst.py) + - [depth_sum](tree/bst/depth_sum.py) + - [count_left_node](tree/bst/count_left_node.py) + - [num_empty](tree/bst/num_empty.py) + - [height](tree/bst/height.py) + - [red_black_tree](tree/red_black_tree) + - [red_black_tree](tree/red_black_tree/red_black_tree.py) + - [segment_tree](tree/segment_tree) + - [segment_tree](tree/segment_tree/segment_tree.py) + - [traversal](tree/traversal) + - [inorder](tree/traversal/inorder.py) + - [level_order](tree/traversal/level_order.py) + - [zigzag](tree/traversal/zigzag.py) + - [trie](tree/trie) + - [add_and_search](tree/trie/add_and_search.py) + - [trie](tree/trie/trie.py) + - [binary_tree_paths](tree/binary_tree_paths.py) + - [bintree2list](tree/bintree2list.py) + - [deepest_left](tree/deepest_left.py) + - [invert_tree](tree/invert_tree.py) + - [is_balanced](tree/is_balanced.py) + - [is_subtree](tree/is_subtree.py) + - [is_symmetric](tree/is_symmetric.py) + - [longest_consecutive](tree/longest_consecutive.py) + - [lowest_common_ancestor](tree/lowest_common_ancestor.py) + - [max_height](tree/max_height.py) + - [max_path_sum](tree/max_path_sum.py) + - [min_height](tree/min_height.py) + - [path_sum](tree/path_sum.py) + - [path_sum2](tree/path_sum2.py) + - [pretty_print](tree/pretty_print.py) + - [same_tree](tree/same_tree.py) + - [tree](tree/tree.py) +- [union-find : 素集合データ構造](union-find) + - [count_islands](union-find/count_islands.py) + +## 貢献者 +本リポジトリは次の方によって維持されています + +* [Keon Kim](https://github.com/keon) +* [Rahul Goswami](https://github.com/goswami-rahul) +* [Christian Bender](https://github.com/christianbender) +* [Ankit Agarwal](https://github.com/ankit167) +* [Hai Hoang Dang](https://github.com/danghai) +* [Saad](https://github.com/SaadBenn) + +また、[全ての貢献者](https://github.com/keon/algorithms/graphs/contributors)に感謝を伝えます。 From a15d058ce3a1e71f11900e10cb54bb13f9aeab33 Mon Sep 17 00:00:00 2001 From: danghai Date: Thu, 31 May 2018 19:19:15 -0700 Subject: [PATCH 306/387] README.md: Update the link after reorganization --- README.md | 508 +++++++++++++++++++++++++++--------------------------- 1 file changed, 254 insertions(+), 254 deletions(-) diff --git a/README.md b/README.md index 1f518e63e..64195d352 100644 --- a/README.md +++ b/README.md @@ -52,260 +52,260 @@ If you want to uninstall algorithms, it is as simple as: ## List of Implementations -- [arrays](arrays) - - [delete_nth](arrays/delete_nth.py) - - [flatten](arrays/flatten.py) - - [garage](arrays/garage.py) - - [josephus_problem](arrays/josephus_problem.py) - - [longest_non_repeat](arrays/longest_non_repeat.py/) - - [merge_intervals](arrays/merge_intervals.py) - - [missing_ranges](arrays/missing_ranges.py) - - [plus_one](arrays/plus_one.py) -    - [rotate_array](arrays/rotate_array.py) - - [summary_ranges](arrays/summary_ranges.py) - - [three_sum](arrays/three_sum.py) - - [two_sum](arrays/two_sum.py) - - [move_zeros_to_end](arrays/move_zeros_to_end.py) -- [backtrack](backtrack) - - [general_solution.md](backtrack/) - - [anagram](backtrack/anagram.py) - - [array_sum_combinations](backtrack/array_sum_combinations.py) - - [combination_sum](backtrack/combination_sum.py) - - [expression_add_operators](backtrack/expression_add_operators.py) - - [factor_combinations](backtrack/factor_combinations.py) - - [generate_abbreviations](backtrack/generate_abbreviations.py) - - [generate_parenthesis](backtrack/generate_parenthesis.py) - - [letter_combination](backtrack/letter_combination.py) - - [palindrome_partitioning](backtrack/palindrome_partitioning.py) - - [pattern_match](backtrack/pattern_match.py) - - [permute](backtrack/permute.py) - - [permute_unique](backtrack/permute_unique.py) - - [subsets](backtrack/subsets.py) - - [subsets_unique](backtrack/subsets_unique.py) -- [bfs](bfs) - - [shortest_distance_from_all_buildings](bfs/shortest_distance_from_all_buildings.py) - - [word_ladder](bfs/word_ladder.py) -- [bit](bit) - - [bytes_int_conversion](bit/bytes_int_conversion.py) - - [count_ones](bit/count_ones.py) - - [find_missing_number](bit/find_missing_number.py) - - [power_of_two](bit/power_of_two.py) - - [reverse_bits](bit/reverse_bits.py) - - [single_number](bit/single_number.py) - - [single_number2](bit/single_number2.py) - - [single_number3](bit/single_number3.py) - - [subsets](bit/subsets.py) - - [add_bitwise_operator](bit/add_bitwise_operator.py) - - [bit_operation](bit/bit_operation.py) - - [swap_pair](bit/swap_pair.py) - - [find_difference](bit/find_difference.py) - - [has_alternative_bit](bit/has_alternative_bit.py) - - [insert_bit](bit/insert_bit.py) - - [remove_bit](bit/remove_bit.py) -- [calculator](calculator) - - [math_parser](calculator/math_parser.py) -- [dfs](dfs) - - [all_factors](dfs/all_factors.py) - - [count_islands](dfs/count_islands.py) - - [pacific_atlantic](dfs/pacific_atlantic.py) - - [sudoku_solver](dfs/sudoku_solver.py) - - [walls_and_gates](dfs/walls_and_gates.py) -- [dp](dp) - - [buy_sell_stock](dp/buy_sell_stock.py) - - [climbing_stairs](dp/climbing_stairs.py) - - [coin_change](dp/coin_change.py) - - [combination_sum](dp/combination_sum.py) - - [egg_drop](dp/egg_drop.py) - - [house_robber](dp/house_robber.py) - - [job_scheduling](dp/job_scheduling.py) - - [knapsack](dp/knapsack.py) - - [longest_increasing](dp/longest_increasing.py) - - [matrix_chain_order](dp/matrix_chain_order.py) - - [max_product_subarray](dp/max_product_subarray.py) - - [max_subarray](dp/max_subarray.py) - - [min_cost_path](dp/min_cost_path.py) - - [num_decodings](dp/num_decodings.py) - - [regex_matching](dp/regex_matching.py) - - [rod_cut](dp/rod_cut.py) - - [word_break](dp/word_break.py) - - [fibonacci](dp/fib.py) -- [graph](graph) - - [strongly_connected](graph/checkDiGraphStronglyConnected.py) - - [clone_graph](graph/clone_graph.py) - - [cycle_detection](graph/cycle_detection.py) - - [find_all_cliques](graph/find_all_cliques.py) - - [find_path](graph/find_path.py) - - [graph](graph/graph.py) - - [markov_chain](graph/markov_chain.py) - - [minimum_spanning_tree](graph/minimum_spanning_tree.py) - - [satisfiability](graph/satisfiability.py) - - [tarjan](graph/tarjan.py) - - [traversal](graph/traversal.py) -- [heap](heap) - - [merge_sorted_k_lists](heap/merge_sorted_k_lists.py) - - [skyline](heap/skyline.py) - - [sliding_window_max](heap/sliding_window_max.py) - - [binary_heap](heap/binary_heap.py) -- [linkedlist](linkedlist) - - [add_two_numbers](linkedlist/add_two_numbers.py) - - [copy_random_pointer](linkedlist/copy_random_pointer.py) - - [delete_node](linkedlist/delete_node.py) - - [first_cyclic_node](linkedlist/first_cyclic_node.py) - - [is_cyclic](linkedlist/is_cyclic.py) - - [is_palindrome](linkedlist/is_palindrome.py) - - [kth_to_last](linkedlist/kth_to_last.py) - - [linkedlist](linkedlist/linkedlist.py) - - [remove_duplicates](linkedlist/remove_duplicates.py) - - [reverse](linkedlist/reverse.py) - - [rotate_list](linkedlist/rotate_list.py) - - [swap_in_pairs](linkedlist/swap_in_pairs.py) - - [is_sorted](linkedlist/is_sorted.py) - - [remove_range](linkedlist/remove_range.py) -- [map](map) - - [hashtable](map/hashtable.py) - - [separate_chaining_hashtable](map/separate_chaining_hashtable.py) - - [longest_common_subsequence](map/longest_common_subsequence.py) - - [randomized_set](map/randomized_set.py) - - [valid_sudoku](map/valid_sudoku.py) -- [maths](maths) - - [base_conversion](maths/base_conversion.py) - - [extended_gcd](maths/extended_gcd.py) - - [gcd/lcm](maths/gcd.py) - - [generate_strobogrammtic](maths/generate_strobogrammtic.py) - - [is_strobogrammatic](maths/is_strobogrammatic.py) - - [next_bigger](maths/next_bigger.py) - - [next_perfect_square](maths/next_perfect_square.py) - - [nth_digit](maths/nth_digit.py) - - [prime_check](maths/prime_check.py) - - [primes_sieve_of_eratosthenes](maths/primes_sieve_of_eratosthenes.py) - - [pythagoras](maths/pythagoras.py) - - [rabin_miller](maths/rabin_miller.py) - - [rsa](maths/rsa.py) - - [sqrt_precision_factor](maths/sqrt_precision_factor.py) - - [summing_digits](maths/summing_digits.py) -- [matrix](matrix) - - [sudoku_validator](matrix/sudoku_validator.py) - - [bomb_enemy](matrix/bomb_enemy.py) - - [copy_transform](matrix/copy_transform.py) - - [count_paths](matrix/count_paths.py) - - [matrix_rotation.txt](matrix/matrix_rotation.txt) - - [rotate_image](matrix/rotate_image.py) - - [search_in_sorted_matrix](matrix/search_in_sorted_matrix.py) - - [sparse_dot_vector](matrix/sparse_dot_vector.py) - - [sparse_mul](matrix/sparse_mul.py) - - [spiral_traversal](matrix/spiral_traversal.py) -- [queues](queues) - - [max_sliding_window](queues/max_sliding_window.py) - - [moving_average](queues/moving_average.py) - - [queue](queues/queue.py) - - [reconstruct_queue](queues/reconstruct_queue.py) - - [zigzagiterator](queues/zigzagiterator.py) -- [search](search) - - [binary_search](search/binary_search.py) - - [first_occurance](search/first_occurance.py) - - [last_occurance](search/last_occurance.py) - - [search_insert](search/search_insert.py) - - [two_sum](search/two_sum.py) - - [search_range](search/search_range.py) - - [find_min_rotate](search/find_min_rotate.py) - - [search_rotate](search/search_rotate.py) -- [set](set) - - [randomized_set](set/randomized_set.py) - - [set_covering](set/set_covering.py) -- [sort](sort) - - [bubble_sort](sort/bubble_sort.py) - - [comb_sort](sort/comb_sort.py) - - [counting_sort](sort/counting_sort.py) - - [heap_sort](sort/heap_sort.py) - - [insertion_sort](sort/insertion_sort.py) - - [meeting_rooms](sort/meeting_rooms.py) - - [merge_sort](sort/merge_sort.py) - - [quick_sort](sort/quick_sort.py) - - [selection_sort](sort/selection_sort.py) - - [sort_colors](sort/sort_colors.py) - - [topsort](sort/topsort.py) - - [wiggle_sort](sort/wiggle_sort.py) -- [stack](stack) - - [longest_abs_path](stack/longest_abs_path.py) - - [simplify_path](stack/simplify_path.py) - - [stack](stack/stack.py) - - [valid_parenthesis](stack/valid_parenthesis.py) - - [stutter](stack/stutter.py) - - [switch_pairs](stack/switch_pairs.py) - - [is_consecutive](stack/is_consecutive.py) - - [remove_min](stack/remove_min.py) - - [is_sorted](stack/is_sorted.py) -- [strings](strings) - - [fizzbuzz](strings/fizzbuzz.py) - - [delete_reoccurring_characters](strings/delete_reoccurring_characters.py) - - [strip_url_params](strings/strip_url_params.py) - - [validate_coordinates](strings/validate_coordinates.py) - - [domain_extractor](strings/domain_extractor.py) - - [merge_string_checker](strings/merge_string_checker.py) - - [add_binary](strings/add_binary.py) - - [breaking_bad](strings/breaking_bad.py) - - [decode_string](strings/decode_string.py) - - [encode_decode](strings/encode_decode.py) - - [group_anagrams](strings/group_anagrams.py) - - [int_to_roman](strings/int_to_roman.py) - - [is_palindrome](strings/is_palindrome.py) - - [license_number](strings/license_number.py) - - [make_sentence](strings/make_sentence.py) - - [multiply_strings](strings/multiply_strings.py) - - [one_edit_distance](strings/one_edit_distance.py) - - [rabin_karp](strings/rabin_karp.py) - - [reverse_string](strings/reverse_string.py) - - [reverse_vowel](strings/reverse_vowel.py) - - [reverse_words](strings/reverse_words.py) - - [roman_to_int](strings/roman_to_int.py) - - [word_squares](strings/word_squares.py) -- [tree](tree) - - [bst](tree/tree/bst) - - [array2bst](tree/bst/array2bst.py) - - [bst_closest_value](tree/bst/bst_closest_value.py) - - [BSTIterator](tree/bst/BSTIterator.py) - - [delete_node](tree/bst/delete_node.py) - - [is_bst](tree/bst/is_bst.py) - - [kth_smallest](tree/bst/kth_smallest.py) - - [lowest_common_ancestor](tree/bst/lowest_common_ancestor.py) - - [predecessor](tree/bst/predecessor.py) - - [serialize_deserialize](tree/bst/serialize_deserialize.py) - - [successor](tree/bst/successor.py) - - [unique_bst](tree/bst/unique_bst.py) - - [depth_sum](tree/bst/depth_sum.py) - - [count_left_node](tree/bst/count_left_node.py) - - [num_empty](tree/bst/num_empty.py) - - [height](tree/bst/height.py) - - [red_black_tree](tree/red_black_tree) - - [red_black_tree](tree/red_black_tree/red_black_tree.py) - - [segment_tree](tree/segment_tree) - - [segment_tree](tree/segment_tree/segment_tree.py) - - [traversal](tree/traversal) - - [inorder](tree/traversal/inorder.py) - - [level_order](tree/traversal/level_order.py) - - [zigzag](tree/traversal/zigzag.py) - - [trie](tree/trie) - - [add_and_search](tree/trie/add_and_search.py) - - [trie](tree/trie/trie.py) - - [binary_tree_paths](tree/binary_tree_paths.py) - - [bintree2list](tree/bintree2list.py) - - [deepest_left](tree/deepest_left.py) - - [invert_tree](tree/invert_tree.py) - - [is_balanced](tree/is_balanced.py) - - [is_subtree](tree/is_subtree.py) - - [is_symmetric](tree/is_symmetric.py) - - [longest_consecutive](tree/longest_consecutive.py) - - [lowest_common_ancestor](tree/lowest_common_ancestor.py) - - [max_height](tree/max_height.py) - - [max_path_sum](tree/max_path_sum.py) - - [min_height](tree/min_height.py) - - [path_sum](tree/path_sum.py) - - [path_sum2](tree/path_sum2.py) - - [pretty_print](tree/pretty_print.py) - - [same_tree](tree/same_tree.py) - - [tree](tree/tree.py) -- [union-find](union-find) - - [count_islands](union-find/count_islands.py) +- [arrays](algorithms/arrays) + - [delete_nth](algorithms/arrays/delete_nth.py) + - [flatten](algorithms/arrays/flatten.py) + - [garage](algorithms/arrays/garage.py) + - [josephus_problem](algorithms/arrays/josephus_problem.py) + - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) + - [merge_intervals](algorithms/arrays/merge_intervals.py) + - [missing_ranges](algorithms/arrays/missing_ranges.py) + - [plus_one](algorithms/arrays/plus_one.py) +    - [rotate_array](algorithms/arrays/rotate_array.py) + - [summary_ranges](algorithms/arrays/summary_ranges.py) + - [three_sum](algorithms/arrays/three_sum.py) + - [two_sum](algorithms/arrays/two_sum.py) + - [move_zeros_to_end](algorithms/arrays/move_zeros_to_end.py) +- [backtrack](algorithms/backtrack) + - [general_solution.md](algorithms/backtrack/) + - [anagram](algorithms/backtrack/anagram.py) + - [array_sum_combinations](algorithms/backtrack/array_sum_combinations.py) + - [combination_sum](algorithms/backtrack/combination_sum.py) + - [expression_add_operators](algorithms/backtrack/expression_add_operators.py) + - [factor_combinations](algorithms/backtrack/factor_combinations.py) + - [generate_abbreviations](algorithms/backtrack/generate_abbreviations.py) + - [generate_parenthesis](algorithms/backtrack/generate_parenthesis.py) + - [letter_combination](algorithms/backtrack/letter_combination.py) + - [palindrome_partitioning](algorithms/backtrack/palindrome_partitioning.py) + - [pattern_match](algorithms/backtrack/pattern_match.py) + - [permute](algorithms/backtrack/permute.py) + - [permute_unique](algorithms/backtrack/permute_unique.py) + - [subsets](algorithms/backtrack/subsets.py) + - [subsets_unique](algorithms/backtrack/subsets_unique.py) +- [bfs](algorithms/bfs) + - [shortest_distance_from_all_buildings](algorithms/bfs/shortest_distance_from_all_buildings.py) + - [word_ladder](algorithms/bfs/word_ladder.py) +- [bit](algorithms/bit) + - [bytes_int_conversion](algorithms/bit/bytes_int_conversion.py) + - [count_ones](algorithms/bit/count_ones.py) + - [find_missing_number](algorithms/bit/find_missing_number.py) + - [power_of_two](algorithms/bit/power_of_two.py) + - [reverse_bits](algorithms/bit/reverse_bits.py) + - [single_number](algorithms/bit/single_number.py) + - [single_number2](algorithms/bit/single_number2.py) + - [single_number3](algorithms/bit/single_number3.py) + - [subsets](algorithms/bit/subsets.py) + - [add_bitwise_operator](algorithms/bit/add_bitwise_operator.py) + - [bit_operation](algorithms/bit/bit_operation.py) + - [swap_pair](algorithms/bit/swap_pair.py) + - [find_difference](algorithms/bit/find_difference.py) + - [has_alternative_bit](algorithms/bit/has_alternative_bit.py) + - [insert_bit](algorithms/bit/insert_bit.py) + - [remove_bit](algorithms/bit/remove_bit.py) +- [calculator](algorithms/calculator) + - [math_parser](algorithms/calculator/math_parser.py) +- [dfs](algorithms/dfs) + - [all_factors](algorithms/dfs/all_factors.py) + - [count_islands](algorithms/dfs/count_islands.py) + - [pacific_atlantic](algorithms/dfs/pacific_atlantic.py) + - [sudoku_solver](algorithms/dfs/sudoku_solver.py) + - [walls_and_gates](algorithms/dfs/walls_and_gates.py) +- [dp](algorithms/dp) + - [buy_sell_stock](algorithms/dp/buy_sell_stock.py) + - [climbing_stairs](algorithms/dp/climbing_stairs.py) + - [coin_change](algorithms/dp/coin_change.py) + - [combination_sum](algorithms/dp/combination_sum.py) + - [egg_drop](algorithms/dp/egg_drop.py) + - [house_robber](algorithms/dp/house_robber.py) + - [job_scheduling](algorithms/dp/job_scheduling.py) + - [knapsack](algorithms/dp/knapsack.py) + - [longest_increasing](algorithms/dp/longest_increasing.py) + - [matrix_chain_order](algorithms/dp/matrix_chain_order.py) + - [max_product_subarray](algorithms/dp/max_product_subarray.py) + - [max_subarray](algorithms/dp/max_subarray.py) + - [min_cost_path](algorithms/dp/min_cost_path.py) + - [num_decodings](algorithms/dp/num_decodings.py) + - [regex_matching](algorithms/dp/regex_matching.py) + - [rod_cut](algorithms/dp/rod_cut.py) + - [word_break](algorithms/dp/word_break.py) + - [fibonacci](algorithms/dp/fib.py) +- [graph](algorithms/graph) + - [strongly_connected](algorithms/graph/checkDiGraphStronglyConnected.py) + - [clone_graph](algorithms/graph/clone_graph.py) + - [cycle_detection](algorithms/graph/cycle_detection.py) + - [find_all_cliques](algorithms/graph/find_all_cliques.py) + - [find_path](algorithms/graph/find_path.py) + - [graph](algorithms/graph/graph.py) + - [markov_chain](algorithms/graph/markov_chain.py) + - [minimum_spanning_tree](algorithms/graph/minimum_spanning_tree.py) + - [satisfiability](algorithms/graph/satisfiability.py) + - [tarjan](algorithms/graph/tarjan.py) + - [traversal](algorithms/graph/traversal.py) +- [heap](algorithms/heap) + - [merge_sorted_k_lists](algorithms/heap/merge_sorted_k_lists.py) + - [skyline](algorithms/heap/skyline.py) + - [sliding_window_max](algorithms/heap/sliding_window_max.py) + - [binary_heap](algorithms/heap/binary_heap.py) +- [linkedlist](algorithms/linkedlist) + - [add_two_numbers](algorithms/linkedlist/add_two_numbers.py) + - [copy_random_pointer](algorithms/linkedlist/copy_random_pointer.py) + - [delete_node](algorithms/linkedlist/delete_node.py) + - [first_cyclic_node](algorithms/linkedlist/first_cyclic_node.py) + - [is_cyclic](algorithms/linkedlist/is_cyclic.py) + - [is_palindrome](algorithms/linkedlist/is_palindrome.py) + - [kth_to_last](algorithms/linkedlist/kth_to_last.py) + - [linkedlist](algorithms/linkedlist/linkedlist.py) + - [remove_duplicates](algorithms/linkedlist/remove_duplicates.py) + - [reverse](algorithms/linkedlist/reverse.py) + - [rotate_list](algorithms/linkedlist/rotate_list.py) + - [swap_in_pairs](algorithms/linkedlist/swap_in_pairs.py) + - [is_sorted](algorithms/linkedlist/is_sorted.py) + - [remove_range](algorithms/linkedlist/remove_range.py) +- [map](algorithms/map) + - [hashtable](algorithms/map/hashtable.py) + - [separate_chaining_hashtable](algorithms/map/separate_chaining_hashtable.py) + - [longest_common_subsequence](algorithms/map/longest_common_subsequence.py) + - [randomized_set](algorithms/map/randomized_set.py) + - [valid_sudoku](algorithms/map/valid_sudoku.py) +- [maths](algorithms/maths) + - [base_conversion](algorithms/maths/base_conversion.py) + - [extended_gcd](algorithms/maths/extended_gcd.py) + - [gcd/lcm](algorithms/maths/gcd.py) + - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) + - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py) + - [next_bigger](algorithms/maths/next_bigger.py) + - [next_perfect_square](algorithms/maths/next_perfect_square.py) + - [nth_digit](algorithms/maths/nth_digit.py) + - [prime_check](algorithms/maths/prime_check.py) + - [primes_sieve_of_eratosthenes](algorithms/maths/primes_sieve_of_eratosthenes.py) + - [pythagoras](algorithms/maths/pythagoras.py) + - [rabin_miller](algorithms/maths/rabin_miller.py) + - [rsa](algorithms/maths/rsa.py) + - [sqrt_precision_factor](algorithms/maths/sqrt_precision_factor.py) + - [summing_digits](algorithms/maths/summing_digits.py) +- [matrix](algorithms/matrix) + - [sudoku_validator](algorithms/matrix/sudoku_validator.py) + - [bomb_enemy](algorithms/matrix/bomb_enemy.py) + - [copy_transform](algorithms/matrix/copy_transform.py) + - [count_paths](algorithms/matrix/count_paths.py) + - [matrix_rotation.txt](algorithms/matrix/matrix_rotation.txt) + - [rotate_image](algorithms/matrix/rotate_image.py) + - [search_in_sorted_matrix](algorithms/matrix/search_in_sorted_matrix.py) + - [sparse_dot_vector](algorithms/matrix/sparse_dot_vector.py) + - [sparse_mul](algorithms/matrix/sparse_mul.py) + - [spiral_traversal](algorithms/matrix/spiral_traversal.py) +- [queues](algorithms/queues) + - [max_sliding_window](algorithms/queues/max_sliding_window.py) + - [moving_average](algorithms/queues/moving_average.py) + - [queue](algorithms/queues/queue.py) + - [reconstruct_queue](algorithms/queues/reconstruct_queue.py) + - [zigzagiterator](algorithms/queues/zigzagiterator.py) +- [search](algorithms/search) + - [binary_search](algorithms/search/binary_search.py) + - [first_occurance](algorithms/search/first_occurance.py) + - [last_occurance](algorithms/search/last_occurance.py) + - [search_insert](algorithms/search/search_insert.py) + - [two_sum](algorithms/search/two_sum.py) + - [search_range](algorithms/search/search_range.py) + - [find_min_rotate](algorithms/search/find_min_rotate.py) + - [search_rotate](algorithms/search/search_rotate.py) +- [set](algorithms/set) + - [randomized_set](algorithms/set/randomized_set.py) + - [set_covering](algorithms/set/set_covering.py) +- [sort](algorithms/sort) + - [bubble_sort](algorithms/sort/bubble_sort.py) + - [comb_sort](algorithms/sort/comb_sort.py) + - [counting_sort](algorithms/sort/counting_sort.py) + - [heap_sort](algorithms/sort/heap_sort.py) + - [insertion_sort](algorithms/sort/insertion_sort.py) + - [meeting_rooms](algorithms/sort/meeting_rooms.py) + - [merge_sort](algorithms/sort/merge_sort.py) + - [quick_sort](algorithms/sort/quick_sort.py) + - [selection_sort](algorithms/sort/selection_sort.py) + - [sort_colors](algorithms/sort/sort_colors.py) + - [topsort](algorithms/sort/topsort.py) + - [wiggle_sort](algorithms/sort/wiggle_sort.py) +- [stack](algorithms/stack) + - [longest_abs_path](algorithms/stack/longest_abs_path.py) + - [simplify_path](algorithms/stack/simplify_path.py) + - [stack](algorithms/stack/stack.py) + - [valid_parenthesis](algorithms/stack/valid_parenthesis.py) + - [stutter](algorithms/stack/stutter.py) + - [switch_pairs](algorithms/stack/switch_pairs.py) + - [is_consecutive](algorithms/stack/is_consecutive.py) + - [remove_min](algorithms/stack/remove_min.py) + - [is_sorted](algorithms/stack/is_sorted.py) +- [strings](algorithms/strings) + - [fizzbuzz](algorithms/strings/fizzbuzz.py) + - [delete_reoccurring_characters](algorithms/strings/delete_reoccurring_characters.py) + - [strip_url_params](algorithms/strings/strip_url_params.py) + - [validate_coordinates](algorithms/strings/validate_coordinates.py) + - [domain_extractor](algorithms/strings/domain_extractor.py) + - [merge_string_checker](algorithms/strings/merge_string_checker.py) + - [add_binary](algorithms/strings/add_binary.py) + - [breaking_bad](algorithms/strings/breaking_bad.py) + - [decode_string](algorithms/strings/decode_string.py) + - [encode_decode](algorithms/strings/encode_decode.py) + - [group_anagrams](algorithms/strings/group_anagrams.py) + - [int_to_roman](algorithms/strings/int_to_roman.py) + - [is_palindrome](algorithms/strings/is_palindrome.py) + - [license_number](algorithms/strings/license_number.py) + - [make_sentence](algorithms/strings/make_sentence.py) + - [multiply_strings](algorithms/strings/multiply_strings.py) + - [one_edit_distance](algorithms/strings/one_edit_distance.py) + - [rabin_karp](algorithms/strings/rabin_karp.py) + - [reverse_string](algorithms/strings/reverse_string.py) + - [reverse_vowel](algorithms/strings/reverse_vowel.py) + - [reverse_words](algorithms/strings/reverse_words.py) + - [roman_to_int](algorithms/strings/roman_to_int.py) + - [word_squares](algorithms/strings/word_squares.py) +- [tree](algorithms/tree) + - [bst](algorithms/tree/tree/bst) + - [array2bst](algorithms/tree/bst/array2bst.py) + - [bst_closest_value](algorithms/tree/bst/bst_closest_value.py) + - [BSTIterator](algorithms/tree/bst/BSTIterator.py) + - [delete_node](algorithms/tree/bst/delete_node.py) + - [is_bst](algorithms/tree/bst/is_bst.py) + - [kth_smallest](algorithms/tree/bst/kth_smallest.py) + - [lowest_common_ancestor](algorithms/tree/bst/lowest_common_ancestor.py) + - [predecessor](algorithms/tree/bst/predecessor.py) + - [serialize_deserialize](algorithms/tree/bst/serialize_deserialize.py) + - [successor](algorithms/tree/bst/successor.py) + - [unique_bst](algorithms/tree/bst/unique_bst.py) + - [depth_sum](algorithms/tree/bst/depth_sum.py) + - [count_left_node](algorithms/tree/bst/count_left_node.py) + - [num_empty](algorithms/tree/bst/num_empty.py) + - [height](algorithms/tree/bst/height.py) + - [red_black_tree](algorithms/tree/red_black_tree) + - [red_black_tree](algorithms/tree/red_black_tree/red_black_tree.py) + - [segment_tree](algorithms/tree/segment_tree) + - [segment_tree](algorithms/tree/segment_tree/segment_tree.py) + - [traversal](algorithms/tree/traversal) + - [inorder](algorithms/tree/traversal/inorder.py) + - [level_order](algorithms/tree/traversal/level_order.py) + - [zigzag](algorithms/tree/traversal/zigzag.py) + - [trie](algorithms/tree/trie) + - [add_and_search](algorithms/tree/trie/add_and_search.py) + - [trie](algorithms/tree/trie/trie.py) + - [binary_tree_paths](algorithms/tree/binary_tree_paths.py) + - [bintree2list](algorithms/tree/bintree2list.py) + - [deepest_left](algorithms/tree/deepest_left.py) + - [invert_tree](algorithms/tree/invert_tree.py) + - [is_balanced](algorithms/tree/is_balanced.py) + - [is_subtree](algorithms/tree/is_subtree.py) + - [is_symmetric](algorithms/tree/is_symmetric.py) + - [longest_consecutive](algorithms/tree/longest_consecutive.py) + - [lowest_common_ancestor](algorithms/tree/lowest_common_ancestor.py) + - [max_height](algorithms/tree/max_height.py) + - [max_path_sum](algorithms/tree/max_path_sum.py) + - [min_height](algorithms/tree/min_height.py) + - [path_sum](algorithms/tree/path_sum.py) + - [path_sum2](algorithms/tree/path_sum2.py) + - [pretty_print](algorithms/tree/pretty_print.py) + - [same_tree](algorithms/tree/same_tree.py) + - [tree](algorithms/tree/tree.py) +- [union-find](algorithms/union-find) + - [count_islands](algorithms/union-find/count_islands.py) ## Contributors The repo is maintained by From 59138dc3eebfd5e3c0fb9e550100e385e2a42830 Mon Sep 17 00:00:00 2001 From: danghai Date: Thu, 31 May 2018 19:34:35 -0700 Subject: [PATCH 307/387] README_CN.md: Update the link after reorganization --- README_CN.md | 419 +++++++++++++++++++++++++-------------------------- 1 file changed, 209 insertions(+), 210 deletions(-) diff --git a/README_CN.md b/README_CN.md index c612cd522..af502aa2f 100644 --- a/README_CN.md +++ b/README_CN.md @@ -42,16 +42,16 @@ pip3 install git+https://github.com/keon/algorithms ``` -通过创建python文件(比如：在sort模块使用merge_sort)进行测试： +通过创建python文件(比如：在sort模块使用merge_sort)进行测试： ``` -from sort import merge_sort +from algorithms.sort import merge_sort if __name__ == "__main__": my_list = [1, 8, 3, 5, 6] - my_list = merge_sort.merge_sort(my_list) + my_list = merge_sort(my_list) print(my_list) - + ``` ## 卸载 @@ -66,212 +66,212 @@ pip3 uninstall -y algorithms ## 实现列表 - [array:数组](arrays) - - [delete_nth: 删除第n项](arrays/delete_nth.py) - - [flatten：数组降维](arrays/flatten.py) - - [garage：停车场](arrays/garage.py) - - [josephus_problem: 约瑟夫问题](arrays/josephus_problem.py) - - [longest_non_repeat：最长不重复子串](arrays/longest_non_repeat.py/) - - [merge_intervals：合并重叠间隔](arrays/merge_intervals.py) - - [missing_ranges：遗失的范围](arrays/missing_ranges.py) - - [plus_one：加一运算](arrays/plus_one.py) - - [rotate_array：反转数组](arrays/rotate_array.py) - - [summary_ranges：数组范围](arrays/summary_ranges.py) - - [three_sum：三数和为零](arrays/three_sum.py) - - [two_sum：两数和](arrays/two_sum.py) - - [move_zeros_to_end: 0后置问题](arrays/move_zeros_to_end.py) -- [backtrack：回溯](backtrack) - - [general_solution.md：一般方法](backtrack/) - - [anagram：同字母异序词](backtrack/anagram.py) - - [array_sum_combinations：数组和](backtrack/array_sum_combinations.py) - - [combination_sum：和的合并](backtrack/combination_sum.py) - - [expression_add_operators：给表达式添加运算符](backtrack/expression_add_operators.py) - - [factor_combinations：因素组合](backtrack/factor_combinations.py) - - [generate_abbreviations：缩写生成](backtrack/generate_abbreviations.py) - - [generate_parenthesis：括号生成](backtrack/generate_parenthesis.py) - - [letter_combination：字母组合](backtrack/letter_combination.py) - - [palindrome_partitioning：字符串的所有回文子串](backtrack/palindrome_partitioning.py) - - [pattern_match：模式匹配](backtrack/pattern_match.py) - - [permute：排列](backtrack/permute.py) - - [permute_unique：唯一排列](backtrack/permute_unique.py) - - [subsets：子集](backtrack/subsets.py) - - [subsets_unique：唯一子集](backtrack/subsets_unique.py) -- [bfs：广度优先搜索](bfs) - - [shortest_distance_from_all_buildings：所有建筑物的最短路径：](bfs/shortest_distance_from_all_buildings.py) - - [word_ladder：词语阶梯](bfs/word_ladder.py) -- [bit：位操作](bit) - - [bytes_int_conversion：字节整数转换](bit/bytes_int_conversion.py) - - [count_ones：统计1出现的次数](bit/count_ones.py) - - [find_missing_number：寻找缺失数](bit/find_missing_number.py) - - [power_of_two：2的n次方数判断](bit/power_of_two.py) - - [reverse_bits：反转位](bit/reverse_bits.py) - - [single_number2：寻找出现1次的数（2)](bit/single_number2.py) - - [single_number:寻找出现1次的数（1)](bit/single_number.py) - - [subsets: 求所有子集](bit/subsets.py) - - [add_bitwise_operator：无操作符的加法](bit/add_bitwise_operator.py) -- [calculator：计算](calculator) - - [math_parser: 数字解析](calculator/math_parser.py) -- [dfs：深度优先搜索](dfs) - - [all_factors：因素分解](dfs/all_factors.py) - - [count_islands：岛计数](dfs/count_islands.py) - - [pacific_atlantic：太平洋大西洋](dfs/pacific_atlantic.py) - - [sudoku_solver：数独解法](dfs/sudoku_solver.py) - - [walls_and_gates：墙和门](dfs/walls_and_gates.py) -- [dp：动态规划](dp) - - [buy_sell_stock：股票买卖](dp/buy_sell_stock.py) - - [climbing_stairs：爬梯子问题](dp/climbing_stairs.py) - - [combination_sum：和组合问题](dp/combination_sum.py) - - [house_robber：打家劫舍](dp/house_robber.py) - - [knapsack：背包问题](dp/knapsack.py) - - [longest_increasing：最长递增子序列](dp/longest_increasing.py) - - [max_product_subarray：最大子数组乘积](dp/max_product_subarray.py) - - [max_subarray：最大子数组](dp/max_subarray.py) - - [num_decodings：数字解码](dp/num_decodings.py) - - [regex_matching：正则匹配](dp/regex_matching.py) - - [word_break：单词分割](dp/word_break.py) + - [delete_nth: 删除第n项](algorithms/arrays/delete_nth.py) + - [flatten：数组降维](algorithms/arrays/flatten.py) + - [garage：停车场](algorithms/arrays/garage.py) + - [josephus_problem: 约瑟夫问题](algorithms/arrays/josephus_problem.py) + - [longest_non_repeat：最长不重复子串](algorithms/arrays/longest_non_repeat.py/) + - [merge_intervals：合并重叠间隔](algorithms/arrays/merge_intervals.py) + - [missing_ranges：遗失的范围](algorithms/arrays/missing_ranges.py) + - [plus_one：加一运算](algorithms/arrays/plus_one.py) + - [rotate_array：反转数组](algorithms/arrays/rotate_array.py) + - [summary_ranges：数组范围](algorithms/arrays/summary_ranges.py) + - [three_sum：三数和为零](algorithms/arrays/three_sum.py) + - [two_sum：两数和](algorithms/arrays/two_sum.py) + - [move_zeros_to_end: 0后置问题](algorithms/arrays/move_zeros_to_end.py) +- [backtrack：回溯](algorithms/backtrack) + - [general_solution.md：一般方法](algorithms/backtrack/) + - [anagram：同字母异序词](algorithms/backtrack/anagram.py) + - [array_sum_combinations：数组和](algorithms/backtrack/array_sum_combinations.py) + - [combination_sum：和的合并](algorithms/backtrack/combination_sum.py) + - [expression_add_operators：给表达式添加运算符](algorithms/backtrack/expression_add_operators.py) + - [factor_combinations：因素组合](algorithms/backtrack/factor_combinations.py) + - [generate_abbreviations：缩写生成](algorithms/backtrack/generate_abbreviations.py) + - [generate_parenthesis：括号生成](algorithms/backtrack/generate_parenthesis.py) + - [letter_combination：字母组合](algorithms/backtrack/letter_combination.py) + - [palindrome_partitioning：字符串的所有回文子串](algorithms/backtrack/palindrome_partitioning.py) + - [pattern_match：模式匹配](algorithms/backtrack/pattern_match.py) + - [permute：排列](algorithms/backtrack/permute.py) + - [permute_unique：唯一排列](algorithms/backtrack/permute_unique.py) + - [subsets：子集](algorithms/backtrack/subsets.py) + - [subsets_unique：唯一子集](algorithms/backtrack/subsets_unique.py) +- [bfs：广度优先搜索](algorithms/bfs) + - [shortest_distance_from_all_buildings：所有建筑物的最短路径：](algorithms/bfs/shortest_distance_from_all_buildings.py) + - [word_ladder：词语阶梯](algorithms/bfs/word_ladder.py) +- [bit：位操作](algorithms/bit) + - [bytes_int_conversion：字节整数转换](algorithms/bit/bytes_int_conversion.py) + - [count_ones：统计1出现的次数](algorithms/bit/count_ones.py) + - [find_missing_number：寻找缺失数](algorithms/bit/find_missing_number.py) + - [power_of_two：2的n次方数判断](algorithms/bit/power_of_two.py) + - [reverse_bits：反转位](algorithms/bit/reverse_bits.py) + - [single_number2：寻找出现1次的数（2)](algorithms/bit/single_number2.py) + - [single_number:寻找出现1次的数（1)](algorithms/bit/single_number.py) + - [subsets: 求所有子集](algorithms/bit/subsets.py) + - [add_bitwise_operator：无操作符的加法](algorithms/bit/add_bitwise_operator.py) +- [calculator：计算](algorithms/calculator) + - [math_parser: 数字解析](algorithms/calculator/math_parser.py) +- [dfs：深度优先搜索](algorithms/dfs) + - [all_factors：因素分解](algorithms/dfs/all_factors.py) + - [count_islands：岛计数](algorithms/dfs/count_islands.py) + - [pacific_atlantic：太平洋大西洋](algorithms/dfs/pacific_atlantic.py) + - [sudoku_solver：数独解法](algorithms/dfs/sudoku_solver.py) + - [walls_and_gates：墙和门](algorithms/dfs/walls_and_gates.py) +- [dp：动态规划](algorithms/dp) + - [buy_sell_stock：股票买卖](algorithms/dp/buy_sell_stock.py) + - [climbing_stairs：爬梯子问题](algorithms/dp/climbing_stairs.py) + - [combination_sum：和组合问题](algorithms/dp/combination_sum.py) + - [house_robber：打家劫舍](algorithms/dp/house_robber.py) + - [knapsack：背包问题](algorithms/dp/knapsack.py) + - [longest_increasing：最长递增子序列](algorithms/dp/longest_increasing.py) + - [max_product_subarray：最大子数组乘积](algorithms/dp/max_product_subarray.py) + - [max_subarray：最大子数组](algorithms/dp/max_subarray.py) + - [num_decodings：数字解码](algorithms/dp/num_decodings.py) + - [regex_matching：正则匹配](algorithms/dp/regex_matching.py) + - [word_break：单词分割](algorithms/dp/word_break.py) - [graph：图](graph) - - [2-sat：2-sat](graph/satisfiability.py) - - [clone_graph：克隆图](graph/clone_graph.py) - - [cycle_detection：判断圈算法](graph/cycle_detection.py) - - [find_path：发现路径](graph/find_path.py) - - [graph：图](graph/graph.py) - - [traversal：遍历](graph/traversal.py) - - [markov_chain：马尔可夫链](graph/markov_chain.py) -- [heap：堆](heap) - - [merge_sorted_k_lists：合并k个有序链](heap/merge_sorted_k_lists.py) - - [skyline：天际线](heap/skyline.py) - - [sliding_window_max：滑动窗口最大值](heap/sliding_window_max.py) -- [linkedlist：链表](linkedlist) - - [add_two_numbers：链表数相加](linkedlist/add_two_numbers.py) - - [copy_random_pointer：复制带有随机指针的链表](linkedlist/copy_random_pointer.py) - - [delete_node：删除节点](linkedlist/delete_node.py) - - [first_cyclic_node：环链表的第一个节点](linkedlist/first_cyclic_node.py) - - [is_cyclic：判断环链表](linkedlist/is_cyclic.py) - - [is_palindrome：回文链表](linkedlist/is_palindrome.py) - - [kth_to_last：倒数第k个节点](linkedlist/kth_to_last.py) - - [linkedlist： 链表](linkedlist/linkedlist.py) - - [remove_duplicates：删除重复元素](linkedlist/remove_duplicates.py) - - [reverse：反转链表](linkedlist/reverse.py) - - [rotate_list：旋转链表](linkedlist/rotate_list.py) - - [swap_in_pairs：链表节点交换](linkedlist/swap_in_pairs.py) -- [map：映射](map) - - [hashtable：哈希表](map/hashtable.py) - - [separate_chaining_hashtable：拉链法哈希表](map/separate_chaining_hashtable.py) - - [longest_common_subsequence：最长公共子序列](map/longest_common_subsequence.py) - - [randomized_set：随机集](map/randomized_set.py) - - [valid_sudoku：有效数独](map/valid_sudoku.py) -- [math：数学问题](maths) - - [extended_gcd：扩展欧几里得算法](maths/extended_gcd.py) - - [gcd/lcm：最大公约数和最小公倍数](maths/gcd.py) - - [prime_test：主要测试](maths/prime_test.py) - - [primes_sieve_of_eratosthenes：埃拉托色尼的质数筛](maths/primes_sieve_of_eratosthenes.py) - - [generate_strobogrammtic：生成对称数](maths/generate_strobogrammtic.py) - - [is_strobogrammatic：判断对称数](maths/is_strobogrammatic.py) - - [nth_digit：第n位](maths/nth_digit.py) - - [rabin_miller：米勒-拉宾素性检验](maths/rabin_miller.py) - - [rsa：rsa加密](maths/rsa.py) - - [sqrt_precision_factor：开发精度因素](maths/sqrt_precision_factor.py) - - [pythagoras：毕达哥拉斯](maths/pythagoras.py) -- [matrix：矩阵](matrix) - - [matrix_rotation：矩阵旋转](matrix/matrix_rotation.txt) - - [copy_transform：复制变换](matrix/copy_transform.py) - - [bomb_enemy：炸弹人](matrix/bomb_enemy.py) - - [rotate_image：旋转图像](matrix/rotate_image.py) - - [sparse_dot_vector：解析点向量](matrix/sparse_dot_vector.py) - - [sparse_mul：稀疏矩阵](matrix/sparse_mul.py) - - [spiral_traversal：循环遍历](matrix/spiral_traversal.py) - - [count_paths：计算路径](matrix/count_paths.py) -- [queue：队列](queues) - - [max_sliding_window：最大移动窗口](queues/max_sliding_window.py) - - [moving_average：移动平均](queues/moving_average.py) - - [queue：队列](queues/queue.py) - - [reconstruct_queue：重建队列](queues/reconstruct_queue.py) - - [zigzagiterator：锯齿形迭代](queues/zigzagiterator.py) -- [search：查找](search) - - [binary_search：二分查找](search/binary_search.py) - - [count_elem：元素计数](search/count_elem.py) - - [first_occurance：首次出现](search/first_occurance.py) - - [last_occurance：最后一次出现](search/last_occurance.py) -- [set：集合](set) - - [randomized_set：随机集合](set/randomized_set.py) - - [set_covering：集合覆盖](set/set_covering.py) -- [sort：排序](sort) - - [bubble_sort：冒泡排序](sort/bubble_sort.py) - - [comb_sort：梳排序](sort/comb_sort.py) - - [counting_sort：计数排序](sort/counting_sort.py) - - [heap_sort：堆排序](sort/heap_sort.py) - - [insertion_sort：插入排序](sort/insertion_sort.py) - - [meeting_rooms：会议室](sort/meeting_rooms.py) - - [merge_sort：归并排序](sort/merge_sort.py) - - [quick_sort：快速排序](sort/quick_sort.py) - - [selection_sort：选择排序](sort/selection_sort.py) - - [sort_colors：颜色排序](sort/sort_colors.py) - - [topsort：top排序](sort/topsort.py) - - [wiggle_sort：摇摆排序](sort/wiggle_sort.py) -- [stack：栈](stack) - - [longest_abs_path：最长相对路径](stack/longest_abs_path.py) - - [simplify_path：简化路径](stack/simplify_path.py) - - [stack：栈](stack/stack.py) - - [valid_parenthesis：验证括号](stack/valid_parenthesis.py) -- [string：字符串](strings) - - [add_binary：二进制数相加](strings/add_binary.py) - - [breaking_bad：打破坏](strings/breaking_bad.py) - - [decode_string：字符串编码](strings/decode_string.py) - - [encode_decode：编解码](strings/encode_decode.py) - - [group_anagrams：群组错位词](strings/group_anagrams.py) - - [int_to_roman：整数转换罗马数字](strings/int_to_roman.py) - - [is_palindrome：回文字符串](strings/is_palindrome.py) - - [license_number：拍照号码](strings/license_number.py) - - [make_sentence：造句](strings/make_sentence.py) - - [multiply_strings：字符串相乘](strings/multiply_strings.py) - - [one_edit_distance：一个编辑距离](strings/one_edit_distance.py) - - [rabin_karp：Rabin-Karp 算法](strings/rabin_karp.py) - - [reverse_string：反转字符串](strings/reverse_string.py) - - [reverse_vowel：反转元音](strings/reverse_vowel.py) - - [reverse_words：反转单词](strings/reverse_words.py) - - [roman_to_int：罗马数转换整数](strings/roman_to_int.py) - - [word_squares：单词平方](strings/word_squares.py) -- [tree：树](tree) - - [segment-tree：线段树](tree/segment_tree) - - [segment_tree：线段树](tree/segment_tree/segment_tree.py) - - [binary_tree_paths：二叉树路径](tree/binary_tree_paths.py) - - [bintree2list：二叉树转换链表](tree/bintree2list.py) - - [bst：二叉搜索树](tree/tree/bst) - - [array2bst：数组转换](tree/bst/array2bst.py) - - [bst_closest_value：最近二叉搜索树值](tree/bst/bst_closest_value.py) - - [BSTIterator：二叉搜索树迭代](tree/bst/BSTIterator.py) - - [delete_node：删除节点](tree/bst/delete_node.py) - - [is_bst：判断二叉搜索树](tree/bst/is_bst.py) - - [kth_smallest：二叉搜索树的第k小节点](tree/bst/kth_smallest.py) - - [lowest_common_ancestor：最近公共祖先](tree/bst/lowest_common_ancestor.py) - - [predecessor：前任](tree/bst/predecessor.py) - - [serialize_deserialize：序列化反序列化](tree/bst/serialize_deserialize.py) - - [successor：继承者](tree/bst/successor.py) - - [unique_bst：唯一BST](tree/bst/unique_bst.py) - - [deepest_left：最深叶子节点](tree/deepest_left.py) - - [invert_tree：反转树](tree/invert_tree.py) - - [is_balanced：判断平衡树](tree/is_balanced.py) - - [is_subtree：判断子树](tree/is_subtree.py) - - [is_symmetric：判断对称树](tree/is_symmetric.py) - - [longest_consecutive：最长连续节点](tree/longest_consecutive.py) - - [lowest_common_ancestor：最近公共祖先](tree/lowest_common_ancestor.py) - - [max_height：最大高度](tree/max_height.py) - - [max_path_sum：最长路径和](tree/max_path_sum.py) - - [min_height：最小高度](tree/min_height.py) - - [path_sum2：路径和2](tree/path_sum2.py) - - [path_sum：路径和](tree/path_sum.py) - - [pretty_print：完美打印](tree/pretty_print.py) - - [same_tree：相同树](tree/same_tree.py) - - [traversal：遍历](tree/traversal) - - [inorder：中序遍历](tree/traversal/inorder.py) - - [level_order：层次遍历](tree/traversal/level_order.py) - - [zigzag：锯齿形遍历](tree/traversal/zigzag.py) - - [tree：树](tree/tree.py) - - [trie：字典树](tree/trie) - - [add_and_search：添加和查找](tree/trie/add_and_search.py) - - [trie：字典](tree/trie/trie.py) -- [union-find：并查集](union-find) - - [count_islands：岛计数](union-find/count_islands.py) - + - [2-sat：2-sat](algorithms/graph/satisfiability.py) + - [clone_graph：克隆图](algorithms/graph/clone_graph.py) + - [cycle_detection：判断圈算法](algorithms/graph/cycle_detection.py) + - [find_path：发现路径](algorithms/graph/find_path.py) + - [graph：图](algorithms/graph/graph.py) + - [traversal：遍历](algorithms/graph/traversal.py) + - [markov_chain：马尔可夫链](algorithms/graph/markov_chain.py) +- [heap：堆](algorithms/heap) + - [merge_sorted_k_lists：合并k个有序链](algorithms/heap/merge_sorted_k_lists.py) + - [skyline：天际线](algorithms/heap/skyline.py) + - [sliding_window_max：滑动窗口最大值](algorithms/heap/sliding_window_max.py) +- [linkedlist：链表](algorithms/linkedlist) + - [add_two_numbers：链表数相加](algorithms/linkedlist/add_two_numbers.py) + - [copy_random_pointer：复制带有随机指针的链表](algorithms/linkedlist/copy_random_pointer.py) + - [delete_node：删除节点](algorithms/linkedlist/delete_node.py) + - [first_cyclic_node：环链表的第一个节点](algorithms/linkedlist/first_cyclic_node.py) + - [is_cyclic：判断环链表](algorithms/linkedlist/is_cyclic.py) + - [is_palindrome：回文链表](algorithms/linkedlist/is_palindrome.py) + - [kth_to_last：倒数第k个节点](algorithms/linkedlist/kth_to_last.py) + - [linkedlist： 链表](algorithms/linkedlist/linkedlist.py) + - [remove_duplicates：删除重复元素](algorithms/linkedlist/remove_duplicates.py) + - [reverse：反转链表](algorithms/linkedlist/reverse.py) + - [rotate_list：旋转链表](algorithms/linkedlist/rotate_list.py) + - [swap_in_pairs：链表节点交换](algorithms/linkedlist/swap_in_pairs.py) +- [map：映射](algorithms/map) + - [hashtable：哈希表](algorithms/map/hashtable.py) + - [separate_chaining_hashtable：拉链法哈希表](algorithms/map/separate_chaining_hashtable.py) + - [longest_common_subsequence：最长公共子序列](algorithms/map/longest_common_subsequence.py) + - [randomized_set：随机集](algorithms/map/randomized_set.py) + - [valid_sudoku：有效数独](algorithms/map/valid_sudoku.py) +- [math：数学问题](algorithms/maths) + - [extended_gcd：扩展欧几里得算法](algorithms/maths/extended_gcd.py) + - [gcd/lcm：最大公约数和最小公倍数](algorithms/maths/gcd.py) + - [prime_test：主要测试](algorithms/maths/prime_test.py) + - [primes_sieve_of_eratosthenes：埃拉托色尼的质数筛](algorithms/maths/primes_sieve_of_eratosthenes.py) + - [generate_strobogrammtic：生成对称数](algorithms/maths/generate_strobogrammtic.py) + - [is_strobogrammatic：判断对称数](algorithms/maths/is_strobogrammatic.py) + - [nth_digit：第n位](algorithms/maths/nth_digit.py) + - [rabin_miller：米勒-拉宾素性检验](algorithms/maths/rabin_miller.py) + - [rsa：rsa加密](algorithms/maths/rsa.py) + - [sqrt_precision_factor：开发精度因素](algorithms/maths/sqrt_precision_factor.py) + - [pythagoras：毕达哥拉斯](algorithms/maths/pythagoras.py) +- [matrix：矩阵](algorithms/matrix) + - [matrix_rotation：矩阵旋转](algorithms/matrix/matrix_rotation.txt) + - [copy_transform：复制变换](algorithms/matrix/copy_transform.py) + - [bomb_enemy：炸弹人](algorithms/matrix/bomb_enemy.py) + - [rotate_image：旋转图像](algorithms/matrix/rotate_image.py) + - [sparse_dot_vector：解析点向量](algorithms/matrix/sparse_dot_vector.py) + - [sparse_mul：稀疏矩阵](algorithms/matrix/sparse_mul.py) + - [spiral_traversal：循环遍历](algorithms/matrix/spiral_traversal.py) + - [count_paths：计算路径](algorithms/matrix/count_paths.py) +- [queue：队列](algorithms/queues) + - [max_sliding_window：最大移动窗口](algorithms/queues/max_sliding_window.py) + - [moving_average：移动平均](algorithms/queues/moving_average.py) + - [queue：队列](algorithms/queues/queue.py) + - [reconstruct_queue：重建队列](algorithms/queues/reconstruct_queue.py) + - [zigzagiterator：锯齿形迭代](algorithms/queues/zigzagiterator.py) +- [search：查找](algorithms/search) + - [binary_search：二分查找](algorithms/search/binary_search.py) + - [count_elem：元素计数](algorithms/search/count_elem.py) + - [first_occurance：首次出现](algorithms/search/first_occurance.py) + - [last_occurance：最后一次出现](algorithms/search/last_occurance.py) +- [set：集合](algorithms/set) + - [randomized_set：随机集合](algorithms/set/randomized_set.py) + - [set_covering：集合覆盖](algorithms/set/set_covering.py) +- [sort：排序](algorithms/sort) + - [bubble_sort：冒泡排序](algorithms/sort/bubble_sort.py) + - [comb_sort：梳排序](algorithms/sort/comb_sort.py) + - [counting_sort：计数排序](algorithms/sort/counting_sort.py) + - [heap_sort：堆排序](algorithms/sort/heap_sort.py) + - [insertion_sort：插入排序](algorithms/sort/insertion_sort.py) + - [meeting_rooms：会议室](algorithms/sort/meeting_rooms.py) + - [merge_sort：归并排序](algorithms/sort/merge_sort.py) + - [quick_sort：快速排序](algorithms/sort/quick_sort.py) + - [selection_sort：选择排序](algorithms/sort/selection_sort.py) + - [sort_colors：颜色排序](algorithms/sort/sort_colors.py) + - [topsort：top排序](algorithms/sort/topsort.py) + - [wiggle_sort：摇摆排序](algorithms/sort/wiggle_sort.py) +- [stack：栈](algorithms/stack) + - [longest_abs_path：最长相对路径](algorithms/stack/longest_abs_path.py) + - [simplify_path：简化路径](algorithms/stack/simplify_path.py) + - [stack：栈](algorithms/stack/stack.py) + - [valid_parenthesis：验证括号](algorithms/stack/valid_parenthesis.py) +- [string：字符串](algorithms/strings) + - [add_binary：二进制数相加](algorithms/strings/add_binary.py) + - [breaking_bad：打破坏](algorithms/strings/breaking_bad.py) + - [decode_string：字符串编码](algorithms/strings/decode_string.py) + - [encode_decode：编解码](algorithms/strings/encode_decode.py) + - [group_anagrams：群组错位词](algorithms/strings/group_anagrams.py) + - [int_to_roman：整数转换罗马数字](algorithms/strings/int_to_roman.py) + - [is_palindrome：回文字符串](algorithms/strings/is_palindrome.py) + - [license_number：拍照号码](algorithms/strings/license_number.py) + - [make_sentence：造句](algorithms/strings/make_sentence.py) + - [multiply_strings：字符串相乘](algorithms/strings/multiply_strings.py) + - [one_edit_distance：一个编辑距离](algorithms/strings/one_edit_distance.py) + - [rabin_karp：Rabin-Karp 算法](algorithms/strings/rabin_karp.py) + - [reverse_string：反转字符串](algorithms/strings/reverse_string.py) + - [reverse_vowel：反转元音](algorithms/strings/reverse_vowel.py) + - [reverse_words：反转单词](algorithms/strings/reverse_words.py) + - [roman_to_int：罗马数转换整数](algorithms/strings/roman_to_int.py) + - [word_squares：单词平方](algorithms/strings/word_squares.py) +- [tree：树](algorithms/tree) + - [segment-tree：线段树](algorithms/tree/segment_tree) + - [segment_tree：线段树](algorithms/tree/segment_tree/segment_tree.py) + - [binary_tree_paths：二叉树路径](algorithms/tree/binary_tree_paths.py) + - [bintree2list：二叉树转换链表](algorithms/tree/bintree2list.py) + - [bst：二叉搜索树](algorithms/tree/tree/bst) + - [array2bst：数组转换](algorithms/tree/bst/array2bst.py) + - [bst_closest_value：最近二叉搜索树值](algorithms/tree/bst/bst_closest_value.py) + - [BSTIterator：二叉搜索树迭代](algorithms/tree/bst/BSTIterator.py) + - [delete_node：删除节点](algorithms/tree/bst/delete_node.py) + - [is_bst：判断二叉搜索树](algorithms/tree/bst/is_bst.py) + - [kth_smallest：二叉搜索树的第k小节点](algorithms/tree/bst/kth_smallest.py) + - [lowest_common_ancestor：最近公共祖先](algorithms/tree/bst/lowest_common_ancestor.py) + - [predecessor：前任](algorithms/tree/bst/predecessor.py) + - [serialize_deserialize：序列化反序列化](algorithms/tree/bst/serialize_deserialize.py) + - [successor：继承者](algorithms/tree/bst/successor.py) + - [unique_bst：唯一BST](algorithms/tree/bst/unique_bst.py) + - [deepest_left：最深叶子节点](algorithms/tree/deepest_left.py) + - [invert_tree：反转树](algorithms/tree/invert_tree.py) + - [is_balanced：判断平衡树](algorithms/tree/is_balanced.py) + - [is_subtree：判断子树](algorithms/tree/is_subtree.py) + - [is_symmetric：判断对称树](algorithms/tree/is_symmetric.py) + - [longest_consecutive：最长连续节点](algorithms/tree/longest_consecutive.py) + - [lowest_common_ancestor：最近公共祖先](algorithms/tree/lowest_common_ancestor.py) + - [max_height：最大高度](algorithms/tree/max_height.py) + - [max_path_sum：最长路径和](algorithms/tree/max_path_sum.py) + - [min_height：最小高度](algorithms/tree/min_height.py) + - [path_sum2：路径和2](algorithms/tree/path_sum2.py) + - [path_sum：路径和](algorithms/tree/path_sum.py) + - [pretty_print：完美打印](algorithms/tree/pretty_print.py) + - [same_tree：相同树](algorithms/tree/same_tree.py) + - [traversal：遍历](algorithms/tree/traversal) + - [inorder：中序遍历](algorithms/tree/traversal/inorder.py) + - [level_order：层次遍历](algorithms/tree/traversal/level_order.py) + - [zigzag：锯齿形遍历](algorithms/tree/traversal/zigzag.py) + - [tree：树](algorithms/tree/tree.py) + - [trie：字典树](algorithms/tree/trie) + - [add_and_search：添加和查找](algorithms/tree/trie/add_and_search.py) + - [trie：字典](algorithms/tree/trie/trie.py) +- [union-find：并查集](algorithms/union-find) + - [count_islands：岛计数](algorithms/union-find/count_islands.py) + ## 贡献 谢谢主要维护人员： @@ -284,4 +284,3 @@ pip3 uninstall -y algorithms * [Saad](https://github.com/SaadBenn) 以及[所有贡献者](https://github.com/keon/algorithms/graphs/contributors) - From 711f9781407ed33ccc928e00a4a2670c7317657b Mon Sep 17 00:00:00 2001 From: danghai Date: Thu, 31 May 2018 19:40:36 -0700 Subject: [PATCH 308/387] README_GE.md: Update the link after reorganization --- README_GE.md | 512 +++++++++++++++++++++++++-------------------------- 1 file changed, 256 insertions(+), 256 deletions(-) diff --git a/README_GE.md b/README_GE.md index af1b8b2c4..8258aae29 100644 --- a/README_GE.md +++ b/README_GE.md @@ -42,11 +42,11 @@ Wenn Sie das Projekt installieren wollen, um es als Module in Ihren Projekten nu Sie können die Installation testen in dem Sie unten stehenden Code in eine Datei packen und ausführen. ```python3 -from sort import merge_sort +from algorithms.sort import merge_sort if __name__ == "__main__": my_list = [1, 8, 3, 5, 6] - my_list = merge_sort.merge_sort(my_list) + my_list = merge_sort(my_list) print(my_list) ``` @@ -59,260 +59,260 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: ## Liste von Implementierungen -- [arrays](arrays) - - [delete_nth](arrays/delete_nth.py) - - [flatten](arrays/flatten.py) - - [garage](arrays/garage.py) - - [josephus_problem](arrays/josephus_problem.py) - - [longest_non_repeat](arrays/longest_non_repeat.py/) - - [merge_intervals](arrays/merge_intervals.py) - - [missing_ranges](arrays/missing_ranges.py) - - [plus_one](arrays/plus_one.py) -    - [rotate_array](arrays/rotate_array.py) - - [summary_ranges](arrays/summary_ranges.py) - - [three_sum](arrays/three_sum.py) - - [two_sum](arrays/two_sum.py) - - [move_zeros_to_end](arrays/move_zeros_to_end.py) -- [backtrack](backtrack) - - [general_solution.md](backtrack/) - - [anagram](backtrack/anagram.py) - - [array_sum_combinations](backtrack/array_sum_combinations.py) - - [combination_sum](backtrack/combination_sum.py) - - [expression_add_operators](backtrack/expression_add_operators.py) - - [factor_combinations](backtrack/factor_combinations.py) - - [generate_abbreviations](backtrack/generate_abbreviations.py) - - [generate_parenthesis](backtrack/generate_parenthesis.py) - - [letter_combination](backtrack/letter_combination.py) - - [palindrome_partitioning](backtrack/palindrome_partitioning.py) - - [pattern_match](backtrack/pattern_match.py) - - [permute](backtrack/permute.py) - - [permute_unique](backtrack/permute_unique.py) - - [subsets](backtrack/subsets.py) - - [subsets_unique](backtrack/subsets_unique.py) -- [bfs](bfs) - - [shortest_distance_from_all_buildings](bfs/shortest_distance_from_all_buildings.py) - - [word_ladder](bfs/word_ladder.py) -- [bit](bit) - - [bytes_int_conversion](bit/bytes_int_conversion.py) - - [count_ones](bit/count_ones.py) - - [find_missing_number](bit/find_missing_number.py) - - [power_of_two](bit/power_of_two.py) - - [reverse_bits](bit/reverse_bits.py) - - [single_number](bit/single_number.py) - - [single_number2](bit/single_number2.py) - - [single_number3](bit/single_number3.py) - - [subsets](bit/subsets.py) - - [add_bitwise_operator](bit/add_bitwise_operator.py) - - [bit_operation](bit/bit_operation.py) - - [swap_pair](bit/swap_pair.py) - - [find_difference](bit/find_difference.py) - - [has_alternative_bit](bit/has_alternative_bit.py) - - [insert_bit](bit/insert_bit.py) - - [remove_bit](bit/remove_bit.py) -- [calculator](calculator) - - [math_parser](calculator/math_parser.py) -- [dfs](dfs) - - [all_factors](dfs/all_factors.py) - - [count_islands](dfs/count_islands.py) - - [pacific_atlantic](dfs/pacific_atlantic.py) - - [sudoku_solver](dfs/sudoku_solver.py) - - [walls_and_gates](dfs/walls_and_gates.py) -- [dp](dp) - - [buy_sell_stock](dp/buy_sell_stock.py) - - [climbing_stairs](dp/climbing_stairs.py) - - [coin_change](dp/coin_change.py) - - [combination_sum](dp/combination_sum.py) - - [egg_drop](dp/egg_drop.py) - - [house_robber](dp/house_robber.py) - - [job_scheduling](dp/job_scheduling.py) - - [knapsack](dp/knapsack.py) - - [longest_increasing](dp/longest_increasing.py) - - [matrix_chain_order](dp/matrix_chain_order.py) - - [max_product_subarray](dp/max_product_subarray.py) - - [max_subarray](dp/max_subarray.py) - - [min_cost_path](dp/min_cost_path.py) - - [num_decodings](dp/num_decodings.py) - - [regex_matching](dp/regex_matching.py) - - [rod_cut](dp/rod_cut.py) - - [word_break](dp/word_break.py) - - [fibonacci](dp/fib.py) -- [graph](graph) - - [strongly_connected](graph/checkDiGraphStronglyConnected.py) - - [clone_graph](graph/clone_graph.py) - - [cycle_detection](graph/cycle_detection.py) - - [find_all_cliques](graph/find_all_cliques.py) - - [find_path](graph/find_path.py) - - [graph](graph/graph.py) - - [markov_chain](graph/markov_chain.py) - - [minimum_spanning_tree](graph/minimum_spanning_tree.py) - - [satisfiability](graph/satisfiability.py) - - [tarjan](graph/tarjan.py) - - [traversal](graph/traversal.py) -- [heap](heap) - - [merge_sorted_k_lists](heap/merge_sorted_k_lists.py) - - [skyline](heap/skyline.py) - - [sliding_window_max](heap/sliding_window_max.py) - - [binary_heap](heap/binary_heap.py) -- [linkedlist](linkedlist) - - [add_two_numbers](linkedlist/add_two_numbers.py) - - [copy_random_pointer](linkedlist/copy_random_pointer.py) - - [delete_node](linkedlist/delete_node.py) - - [first_cyclic_node](linkedlist/first_cyclic_node.py) - - [is_cyclic](linkedlist/is_cyclic.py) - - [is_palindrome](linkedlist/is_palindrome.py) - - [kth_to_last](linkedlist/kth_to_last.py) - - [linkedlist](linkedlist/linkedlist.py) - - [remove_duplicates](linkedlist/remove_duplicates.py) - - [reverse](linkedlist/reverse.py) - - [rotate_list](linkedlist/rotate_list.py) - - [swap_in_pairs](linkedlist/swap_in_pairs.py) - - [is_sorted](linkedlist/is_sorted.py) - - [remove_range](linkedlist/remove_range.py) -- [map](map) - - [hashtable](map/hashtable.py) - - [separate_chaining_hashtable](map/separate_chaining_hashtable.py) - - [longest_common_subsequence](map/longest_common_subsequence.py) - - [randomized_set](map/randomized_set.py) - - [valid_sudoku](map/valid_sudoku.py) -- [maths](maths) - - [base_conversion](maths/base_conversion.py) - - [extended_gcd](maths/extended_gcd.py) - - [gcd/lcm](maths/gcd.py) - - [generate_strobogrammtic](maths/generate_strobogrammtic.py) - - [is_strobogrammatic](maths/is_strobogrammatic.py) - - [next_bigger](maths/next_bigger.py) - - [next_perfect_square](maths/next_perfect_square.py) - - [nth_digit](maths/nth_digit.py) - - [prime_check](maths/prime_check.py) - - [primes_sieve_of_eratosthenes](maths/primes_sieve_of_eratosthenes.py) - - [pythagoras](maths/pythagoras.py) - - [rabin_miller](maths/rabin_miller.py) - - [rsa](maths/rsa.py) - - [sqrt_precision_factor](maths/sqrt_precision_factor.py) - - [summing_digits](maths/summing_digits.py) -- [matrix](matrix) - - [sudoku_validator](matrix/sudoku_validator.py) - - [bomb_enemy](matrix/bomb_enemy.py) - - [copy_transform](matrix/copy_transform.py) - - [count_paths](matrix/count_paths.py) - - [matrix_rotation.txt](matrix/matrix_rotation.txt) - - [rotate_image](matrix/rotate_image.py) - - [search_in_sorted_matrix](matrix/search_in_sorted_matrix.py) - - [sparse_dot_vector](matrix/sparse_dot_vector.py) - - [sparse_mul](matrix/sparse_mul.py) - - [spiral_traversal](matrix/spiral_traversal.py) -- [queues](queues) - - [max_sliding_window](queues/max_sliding_window.py) - - [moving_average](queues/moving_average.py) - - [queue](queues/queue.py) - - [reconstruct_queue](queues/reconstruct_queue.py) - - [zigzagiterator](queues/zigzagiterator.py) -- [search](search) - - [binary_search](search/binary_search.py) - - [first_occurance](search/first_occurance.py) - - [last_occurance](search/last_occurance.py) - - [search_insert](search/search_insert.py) - - [two_sum](search/two_sum.py) - - [search_range](search/search_range.py) - - [find_min_rotate](search/find_min_rotate.py) - - [search_rotate](search/search_rotate.py) -- [set](set) - - [randomized_set](set/randomized_set.py) - - [set_covering](set/set_covering.py) -- [sort](sort) - - [bubble_sort](sort/bubble_sort.py) - - [comb_sort](sort/comb_sort.py) - - [counting_sort](sort/counting_sort.py) - - [heap_sort](sort/heap_sort.py) - - [insertion_sort](sort/insertion_sort.py) - - [meeting_rooms](sort/meeting_rooms.py) - - [merge_sort](sort/merge_sort.py) - - [quick_sort](sort/quick_sort.py) - - [selection_sort](sort/selection_sort.py) - - [sort_colors](sort/sort_colors.py) - - [topsort](sort/topsort.py) - - [wiggle_sort](sort/wiggle_sort.py) -- [stack](stack) - - [longest_abs_path](stack/longest_abs_path.py) - - [simplify_path](stack/simplify_path.py) - - [stack](stack/stack.py) - - [valid_parenthesis](stack/valid_parenthesis.py) - - [stutter](stack/stutter.py) - - [switch_pairs](stack/switch_pairs.py) - - [is_consecutive](stack/is_consecutive.py) - - [remove_min](stack/remove_min.py) - - [is_sorted](stack/is_sorted.py) -- [strings](strings) - - [fizzbuzz](strings/fizzbuzz.py) - - [delete_reoccurring_characters](strings/delete_reoccurring_characters.py) - - [strip_url_params](strings/strip_url_params.py) - - [validate_coordinates](strings/validate_coordinates.py) - - [domain_extractor](strings/domain_extractor.py) - - [merge_string_checker](strings/merge_string_checker.py) - - [add_binary](strings/add_binary.py) - - [breaking_bad](strings/breaking_bad.py) - - [decode_string](strings/decode_string.py) - - [encode_decode](strings/encode_decode.py) - - [group_anagrams](strings/group_anagrams.py) - - [int_to_roman](strings/int_to_roman.py) - - [is_palindrome](strings/is_palindrome.py) - - [license_number](strings/license_number.py) - - [make_sentence](strings/make_sentence.py) - - [multiply_strings](strings/multiply_strings.py) - - [one_edit_distance](strings/one_edit_distance.py) - - [rabin_karp](strings/rabin_karp.py) - - [reverse_string](strings/reverse_string.py) - - [reverse_vowel](strings/reverse_vowel.py) - - [reverse_words](strings/reverse_words.py) - - [roman_to_int](strings/roman_to_int.py) - - [word_squares](strings/word_squares.py) -- [tree](tree) - - [bst](tree/tree/bst) - - [array2bst](tree/bst/array2bst.py) - - [bst_closest_value](tree/bst/bst_closest_value.py) - - [BSTIterator](tree/bst/BSTIterator.py) - - [delete_node](tree/bst/delete_node.py) - - [is_bst](tree/bst/is_bst.py) - - [kth_smallest](tree/bst/kth_smallest.py) - - [lowest_common_ancestor](tree/bst/lowest_common_ancestor.py) - - [predecessor](tree/bst/predecessor.py) - - [serialize_deserialize](tree/bst/serialize_deserialize.py) - - [successor](tree/bst/successor.py) - - [unique_bst](tree/bst/unique_bst.py) - - [depth_sum](tree/bst/depth_sum.py) - - [count_left_node](tree/bst/count_left_node.py) - - [num_empty](tree/bst/num_empty.py) - - [height](tree/bst/height.py) - - [red_black_tree](tree/red_black_tree) - - [red_black_tree](tree/red_black_tree/red_black_tree.py) - - [segment_tree](tree/segment_tree) - - [segment_tree](tree/segment_tree/segment_tree.py) - - [traversal](tree/traversal) - - [inorder](tree/traversal/inorder.py) - - [level_order](tree/traversal/level_order.py) - - [zigzag](tree/traversal/zigzag.py) - - [trie](tree/trie) - - [add_and_search](tree/trie/add_and_search.py) - - [trie](tree/trie/trie.py) - - [binary_tree_paths](tree/binary_tree_paths.py) - - [bintree2list](tree/bintree2list.py) - - [deepest_left](tree/deepest_left.py) - - [invert_tree](tree/invert_tree.py) - - [is_balanced](tree/is_balanced.py) - - [is_subtree](tree/is_subtree.py) - - [is_symmetric](tree/is_symmetric.py) - - [longest_consecutive](tree/longest_consecutive.py) - - [lowest_common_ancestor](tree/lowest_common_ancestor.py) - - [max_height](tree/max_height.py) - - [max_path_sum](tree/max_path_sum.py) - - [min_height](tree/min_height.py) - - [path_sum](tree/path_sum.py) - - [path_sum2](tree/path_sum2.py) - - [pretty_print](tree/pretty_print.py) - - [same_tree](tree/same_tree.py) - - [tree](tree/tree.py) -- [union-find](union-find) - - [count_islands](union-find/count_islands.py) +- [arrays](algorithms/arrays) + - [delete_nth](algorithms/arrays/delete_nth.py) + - [flatten](algorithms/arrays/flatten.py) + - [garage](algorithms/arrays/garage.py) + - [josephus_problem](algorithms/arrays/josephus_problem.py) + - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) + - [merge_intervals](algorithms/arrays/merge_intervals.py) + - [missing_ranges](algorithms/arrays/missing_ranges.py) + - [plus_one](algorithms/arrays/plus_one.py) +    - [rotate_array](algorithms/arrays/rotate_array.py) + - [summary_ranges](algorithms/arrays/summary_ranges.py) + - [three_sum](algorithms/arrays/three_sum.py) + - [two_sum](algorithms/arrays/two_sum.py) + - [move_zeros_to_end](algorithms/arrays/move_zeros_to_end.py) +- [backtrack](algorithms/backtrack) + - [general_solution.md](algorithms/backtrack/) + - [anagram](algorithms/backtrack/anagram.py) + - [array_sum_combinations](algorithms/backtrack/array_sum_combinations.py) + - [combination_sum](algorithms/backtrack/combination_sum.py) + - [expression_add_operators](algorithms/backtrack/expression_add_operators.py) + - [factor_combinations](algorithms/backtrack/factor_combinations.py) + - [generate_abbreviations](algorithms/backtrack/generate_abbreviations.py) + - [generate_parenthesis](algorithms/backtrack/generate_parenthesis.py) + - [letter_combination](algorithms/backtrack/letter_combination.py) + - [palindrome_partitioning](algorithms/backtrack/palindrome_partitioning.py) + - [pattern_match](algorithms/backtrack/pattern_match.py) + - [permute](algorithms/backtrack/permute.py) + - [permute_unique](algorithms/backtrack/permute_unique.py) + - [subsets](algorithms/backtrack/subsets.py) + - [subsets_unique](algorithms/backtrack/subsets_unique.py) +- [bfs](algorithms/bfs) + - [shortest_distance_from_all_buildings](algorithms/bfs/shortest_distance_from_all_buildings.py) + - [word_ladder](algorithms/bfs/word_ladder.py) +- [bit](algorithms/bit) + - [bytes_int_conversion](algorithms/bit/bytes_int_conversion.py) + - [count_ones](algorithms/bit/count_ones.py) + - [find_missing_number](algorithms/bit/find_missing_number.py) + - [power_of_two](algorithms/bit/power_of_two.py) + - [reverse_bits](algorithms/bit/reverse_bits.py) + - [single_number](algorithms/bit/single_number.py) + - [single_number2](algorithms/bit/single_number2.py) + - [single_number3](algorithms/bit/single_number3.py) + - [subsets](algorithms/bit/subsets.py) + - [add_bitwise_operator](algorithms/bit/add_bitwise_operator.py) + - [bit_operation](algorithms/bit/bit_operation.py) + - [swap_pair](algorithms/bit/swap_pair.py) + - [find_difference](algorithms/bit/find_difference.py) + - [has_alternative_bit](algorithms/bit/has_alternative_bit.py) + - [insert_bit](algorithms/bit/insert_bit.py) + - [remove_bit](algorithms/bit/remove_bit.py) +- [calculator](algorithms/calculator) + - [math_parser](algorithms/calculator/math_parser.py) +- [dfs](algorithms/dfs) + - [all_factors](algorithms/dfs/all_factors.py) + - [count_islands](algorithms/dfs/count_islands.py) + - [pacific_atlantic](algorithms/dfs/pacific_atlantic.py) + - [sudoku_solver](algorithms/dfs/sudoku_solver.py) + - [walls_and_gates](algorithms/dfs/walls_and_gates.py) +- [dp](algorithms/dp) + - [buy_sell_stock](algorithms/dp/buy_sell_stock.py) + - [climbing_stairs](algorithms/dp/climbing_stairs.py) + - [coin_change](algorithms/dp/coin_change.py) + - [combination_sum](algorithms/dp/combination_sum.py) + - [egg_drop](algorithms/dp/egg_drop.py) + - [house_robber](algorithms/dp/house_robber.py) + - [job_scheduling](algorithms/dp/job_scheduling.py) + - [knapsack](algorithms/dp/knapsack.py) + - [longest_increasing](algorithms/dp/longest_increasing.py) + - [matrix_chain_order](algorithms/dp/matrix_chain_order.py) + - [max_product_subarray](algorithms/dp/max_product_subarray.py) + - [max_subarray](algorithms/dp/max_subarray.py) + - [min_cost_path](algorithms/dp/min_cost_path.py) + - [num_decodings](algorithms/dp/num_decodings.py) + - [regex_matching](algorithms/dp/regex_matching.py) + - [rod_cut](algorithms/dp/rod_cut.py) + - [word_break](algorithms/dp/word_break.py) + - [fibonacci](algorithms/dp/fib.py) +- [graph](algorithms/graph) + - [strongly_connected](algorithms/graph/checkDiGraphStronglyConnected.py) + - [clone_graph](algorithms/graph/clone_graph.py) + - [cycle_detection](algorithms/graph/cycle_detection.py) + - [find_all_cliques](algorithms/graph/find_all_cliques.py) + - [find_path](algorithms/graph/find_path.py) + - [graph](algorithms/graph/graph.py) + - [markov_chain](algorithms/graph/markov_chain.py) + - [minimum_spanning_tree](algorithms/graph/minimum_spanning_tree.py) + - [satisfiability](algorithms/graph/satisfiability.py) + - [tarjan](algorithms/graph/tarjan.py) + - [traversal](algorithms/graph/traversal.py) +- [heap](algorithms/heap) + - [merge_sorted_k_lists](algorithms/heap/merge_sorted_k_lists.py) + - [skyline](algorithms/heap/skyline.py) + - [sliding_window_max](algorithms/heap/sliding_window_max.py) + - [binary_heap](algorithms/heap/binary_heap.py) +- [linkedlist](algorithms/linkedlist) + - [add_two_numbers](algorithms/linkedlist/add_two_numbers.py) + - [copy_random_pointer](algorithms/linkedlist/copy_random_pointer.py) + - [delete_node](algorithms/linkedlist/delete_node.py) + - [first_cyclic_node](algorithms/linkedlist/first_cyclic_node.py) + - [is_cyclic](algorithms/linkedlist/is_cyclic.py) + - [is_palindrome](algorithms/linkedlist/is_palindrome.py) + - [kth_to_last](algorithms/linkedlist/kth_to_last.py) + - [linkedlist](algorithms/linkedlist/linkedlist.py) + - [remove_duplicates](algorithms/linkedlist/remove_duplicates.py) + - [reverse](algorithms/linkedlist/reverse.py) + - [rotate_list](algorithms/linkedlist/rotate_list.py) + - [swap_in_pairs](algorithms/linkedlist/swap_in_pairs.py) + - [is_sorted](algorithms/linkedlist/is_sorted.py) + - [remove_range](algorithms/linkedlist/remove_range.py) +- [map](algorithms/map) + - [hashtable](algorithms/map/hashtable.py) + - [separate_chaining_hashtable](algorithms/map/separate_chaining_hashtable.py) + - [longest_common_subsequence](algorithms/map/longest_common_subsequence.py) + - [randomized_set](algorithms/map/randomized_set.py) + - [valid_sudoku](algorithms/map/valid_sudoku.py) +- [maths](algorithms/maths) + - [base_conversion](algorithms/maths/base_conversion.py) + - [extended_gcd](algorithms/maths/extended_gcd.py) + - [gcd/lcm](algorithms/maths/gcd.py) + - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) + - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py) + - [next_bigger](algorithms/maths/next_bigger.py) + - [next_perfect_square](algorithms/maths/next_perfect_square.py) + - [nth_digit](algorithms/maths/nth_digit.py) + - [prime_check](algorithms/maths/prime_check.py) + - [primes_sieve_of_eratosthenes](algorithms/maths/primes_sieve_of_eratosthenes.py) + - [pythagoras](algorithms/maths/pythagoras.py) + - [rabin_miller](algorithms/maths/rabin_miller.py) + - [rsa](algorithms/maths/rsa.py) + - [sqrt_precision_factor](algorithms/maths/sqrt_precision_factor.py) + - [summing_digits](algorithms/maths/summing_digits.py) +- [matrix](algorithms/matrix) + - [sudoku_validator](algorithms/matrix/sudoku_validator.py) + - [bomb_enemy](algorithms/matrix/bomb_enemy.py) + - [copy_transform](algorithms/matrix/copy_transform.py) + - [count_paths](algorithms/matrix/count_paths.py) + - [matrix_rotation.txt](algorithms/matrix/matrix_rotation.txt) + - [rotate_image](algorithms/matrix/rotate_image.py) + - [search_in_sorted_matrix](algorithms/matrix/search_in_sorted_matrix.py) + - [sparse_dot_vector](algorithms/matrix/sparse_dot_vector.py) + - [sparse_mul](algorithms/matrix/sparse_mul.py) + - [spiral_traversal](algorithms/matrix/spiral_traversal.py) +- [queues](algorithms/queues) + - [max_sliding_window](algorithms/queues/max_sliding_window.py) + - [moving_average](algorithms/queues/moving_average.py) + - [queue](algorithms/queues/queue.py) + - [reconstruct_queue](algorithms/queues/reconstruct_queue.py) + - [zigzagiterator](algorithms/queues/zigzagiterator.py) +- [search](algorithms/search) + - [binary_search](algorithms/search/binary_search.py) + - [first_occurance](algorithms/search/first_occurance.py) + - [last_occurance](algorithms/search/last_occurance.py) + - [search_insert](algorithms/search/search_insert.py) + - [two_sum](algorithms/search/two_sum.py) + - [search_range](algorithms/search/search_range.py) + - [find_min_rotate](algorithms/search/find_min_rotate.py) + - [search_rotate](algorithms/search/search_rotate.py) +- [set](algorithms/set) + - [randomized_set](algorithms/set/randomized_set.py) + - [set_covering](algorithms/set/set_covering.py) +- [sort](algorithms/sort) + - [bubble_sort](algorithms/sort/bubble_sort.py) + - [comb_sort](algorithms/sort/comb_sort.py) + - [counting_sort](algorithms/sort/counting_sort.py) + - [heap_sort](algorithms/sort/heap_sort.py) + - [insertion_sort](algorithms/sort/insertion_sort.py) + - [meeting_rooms](algorithms/sort/meeting_rooms.py) + - [merge_sort](algorithms/sort/merge_sort.py) + - [quick_sort](algorithms/sort/quick_sort.py) + - [selection_sort](algorithms/sort/selection_sort.py) + - [sort_colors](algorithms/sort/sort_colors.py) + - [topsort](algorithms/sort/topsort.py) + - [wiggle_sort](algorithms/sort/wiggle_sort.py) +- [stack](algorithms/stack) + - [longest_abs_path](algorithms/stack/longest_abs_path.py) + - [simplify_path](algorithms/stack/simplify_path.py) + - [stack](algorithms/stack/stack.py) + - [valid_parenthesis](algorithms/stack/valid_parenthesis.py) + - [stutter](algorithms/stack/stutter.py) + - [switch_pairs](algorithms/stack/switch_pairs.py) + - [is_consecutive](algorithms/stack/is_consecutive.py) + - [remove_min](algorithms/stack/remove_min.py) + - [is_sorted](algorithms/stack/is_sorted.py) +- [strings](algorithms/strings) + - [fizzbuzz](algorithms/strings/fizzbuzz.py) + - [delete_reoccurring_characters](algorithms/strings/delete_reoccurring_characters.py) + - [strip_url_params](algorithms/strings/strip_url_params.py) + - [validate_coordinates](algorithms/strings/validate_coordinates.py) + - [domain_extractor](algorithms/strings/domain_extractor.py) + - [merge_string_checker](algorithms/strings/merge_string_checker.py) + - [add_binary](algorithms/strings/add_binary.py) + - [breaking_bad](algorithms/strings/breaking_bad.py) + - [decode_string](algorithms/strings/decode_string.py) + - [encode_decode](algorithms/strings/encode_decode.py) + - [group_anagrams](algorithms/strings/group_anagrams.py) + - [int_to_roman](algorithms/strings/int_to_roman.py) + - [is_palindrome](algorithms/strings/is_palindrome.py) + - [license_number](algorithms/strings/license_number.py) + - [make_sentence](algorithms/strings/make_sentence.py) + - [multiply_strings](algorithms/strings/multiply_strings.py) + - [one_edit_distance](algorithms/strings/one_edit_distance.py) + - [rabin_karp](algorithms/strings/rabin_karp.py) + - [reverse_string](algorithms/strings/reverse_string.py) + - [reverse_vowel](algorithms/strings/reverse_vowel.py) + - [reverse_words](algorithms/strings/reverse_words.py) + - [roman_to_int](algorithms/strings/roman_to_int.py) + - [word_squares](algorithms/strings/word_squares.py) +- [tree](algorithms/tree) + - [bst](algorithms/tree/tree/bst) + - [array2bst](algorithms/tree/bst/array2bst.py) + - [bst_closest_value](algorithms/tree/bst/bst_closest_value.py) + - [BSTIterator](algorithms/tree/bst/BSTIterator.py) + - [delete_node](algorithms/tree/bst/delete_node.py) + - [is_bst](algorithms/tree/bst/is_bst.py) + - [kth_smallest](algorithms/tree/bst/kth_smallest.py) + - [lowest_common_ancestor](algorithms/tree/bst/lowest_common_ancestor.py) + - [predecessor](algorithms/tree/bst/predecessor.py) + - [serialize_deserialize](algorithms/tree/bst/serialize_deserialize.py) + - [successor](algorithms/tree/bst/successor.py) + - [unique_bst](algorithms/tree/bst/unique_bst.py) + - [depth_sum](algorithms/tree/bst/depth_sum.py) + - [count_left_node](algorithms/tree/bst/count_left_node.py) + - [num_empty](algorithms/tree/bst/num_empty.py) + - [height](algorithms/tree/bst/height.py) + - [red_black_tree](algorithms/tree/red_black_tree) + - [red_black_tree](algorithms/tree/red_black_tree/red_black_tree.py) + - [segment_tree](algorithms/tree/segment_tree) + - [segment_tree](algorithms/tree/segment_tree/segment_tree.py) + - [traversal](algorithms/tree/traversal) + - [inorder](algorithms/tree/traversal/inorder.py) + - [level_order](algorithms/tree/traversal/level_order.py) + - [zigzag](algorithms/tree/traversal/zigzag.py) + - [trie](algorithms/tree/trie) + - [add_and_search](algorithms/tree/trie/add_and_search.py) + - [trie](algorithms/tree/trie/trie.py) + - [binary_tree_paths](algorithms/tree/binary_tree_paths.py) + - [bintree2list](algorithms/tree/bintree2list.py) + - [deepest_left](algorithms/tree/deepest_left.py) + - [invert_tree](algorithms/tree/invert_tree.py) + - [is_balanced](algorithms/tree/is_balanced.py) + - [is_subtree](algorithms/tree/is_subtree.py) + - [is_symmetric](algorithms/tree/is_symmetric.py) + - [longest_consecutive](algorithms/tree/longest_consecutive.py) + - [lowest_common_ancestor](algorithms/tree/lowest_common_ancestor.py) + - [max_height](algorithms/tree/max_height.py) + - [max_path_sum](algorithms/tree/max_path_sum.py) + - [min_height](algorithms/tree/min_height.py) + - [path_sum](algorithms/tree/path_sum.py) + - [path_sum2](algorithms/tree/path_sum2.py) + - [pretty_print](algorithms/tree/pretty_print.py) + - [same_tree](algorithms/tree/same_tree.py) + - [tree](algorithms/tree/tree.py) +- [union-find](algorithms/union-find) + - [count_islands](algorithms/union-find/count_islands.py) ## Mitwirkende From b39f4e52d06dc64706a8f9eec3adb5e5744a573b Mon Sep 17 00:00:00 2001 From: Lee Geon Date: Sat, 2 Jun 2018 05:59:31 +0900 Subject: [PATCH 309/387] added bucket_sort.py & shell_sort.py (#296) * Create bucket_sort.py * Create shell_sort.py * Update test_sort.py * Update __init__.py --- algorithms/sort/__init__.py | 2 ++ algorithms/sort/bucket_sort.py | 28 ++++++++++++++++++++++++++++ algorithms/sort/shell_sort.py | 21 +++++++++++++++++++++ tests/test_sort.py | 13 ++++++++++++- 4 files changed, 63 insertions(+), 1 deletion(-) create mode 100644 algorithms/sort/bucket_sort.py create mode 100644 algorithms/sort/shell_sort.py diff --git a/algorithms/sort/__init__.py b/algorithms/sort/__init__.py index 20a3cf326..665a0d70d 100644 --- a/algorithms/sort/__init__.py +++ b/algorithms/sort/__init__.py @@ -6,3 +6,5 @@ from .merge_sort import * from .quick_sort import * from .selection_sort import * +from .bucket_sort import * +from .shell_sort import * diff --git a/algorithms/sort/bucket_sort.py b/algorithms/sort/bucket_sort.py new file mode 100644 index 000000000..d89232ccf --- /dev/null +++ b/algorithms/sort/bucket_sort.py @@ -0,0 +1,28 @@ +def bucket_sort(arr): + ''' Bucket Sort + Complexity: O(n^2) + The complexity is dominated by nextSort + ''' + # The number of buckets and make buckets + num_buckets = len(arr) + buckets = [[] for bucket in range(num_buckets)] + # Assign values into bucket_sort + for value in arr: + index = value * num_buckets // (max(arr) + 1) + buckets[index].append(value) + # Sort + sorted_list = [] + for i in range(num_buckets): + sorted_list.extend(next_sort(buckets[i])) + return sorted_list + +def next_sort(arr): + # We will use insertion sort here. + for i in range(1, len(arr)): + j = i - 1 + key = arr[i] + while arr[j] > key and j >= 0: + arr[j+1] = arr[j] + j = j - 1 + arr[j + 1] = key + return arr diff --git a/algorithms/sort/shell_sort.py b/algorithms/sort/shell_sort.py new file mode 100644 index 000000000..61f5f612e --- /dev/null +++ b/algorithms/sort/shell_sort.py @@ -0,0 +1,21 @@ +def shell_sort(arr): + ''' Shell Sort + Complexity: O(n^2) + ''' + n = len(arr) + # Initialize size of the gap + gap = n//2 + + while gap > 0: + y_index = gap + while y_index < len(arr): + y = arr[y_index] + x_index = y_index - gap + while x_index >= 0 and y < arr[x_index]: + arr[x_index + gap] = arr[x_index] + x_index = x_index - gap + arr[x_index + gap] = y + y_index = y_index + 1 + gap = gap//2 + + return arr diff --git a/tests/test_sort.py b/tests/test_sort.py index 07d13c8f3..43d5bf29e 100644 --- a/tests/test_sort.py +++ b/tests/test_sort.py @@ -6,7 +6,9 @@ insertion_sort, merge_sort, quick_sort, - selection_sort + selection_sort, + bucket_sort, + shell_sort ) import unittest @@ -49,6 +51,15 @@ def test_selection_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], selection_sort([1, 5, 65, 23, 57, 1232])) + def test_bucket_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + bucket_sort([1, 5, 65, 23, 57, 1232])) + + def test_shell_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + shell_sort([1, 5, 65, 23, 57, 1232])) + + if __name__ == "__main__": unittest.main() From b905623fd950be879d8940b3892b016407378f8c Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Sat, 2 Jun 2018 07:47:29 +0530 Subject: [PATCH 310/387] add some bit problems (#294) * add arrays/max_ones_index * add 2 algorithms to algorithms/bit * update all READMEs --- README.md | 11 ++++-- README_CN.md | 7 +++- README_GE.md | 5 ++- README_JP.md | 3 ++ algorithms/arrays/__init__.py | 1 + algorithms/arrays/max_ones_index.py | 43 +++++++++++++++++++++ algorithms/bit/__init__.py | 2 + algorithms/bit/count_flips_to_convert.py | 19 +++++++++ algorithms/bit/flip_bit_longest_sequence.py | 30 ++++++++++++++ tests/test_array.py | 38 +++++++++++------- tests/test_bit.py | 30 ++++++++++++-- 11 files changed, 166 insertions(+), 23 deletions(-) create mode 100644 algorithms/arrays/max_ones_index.py create mode 100644 algorithms/bit/count_flips_to_convert.py create mode 100644 algorithms/bit/flip_bit_longest_sequence.py diff --git a/README.md b/README.md index f67925c52..83547b14a 100644 --- a/README.md +++ b/README.md @@ -1,4 +1,4 @@ -English | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) +English | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) [![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) @@ -58,6 +58,7 @@ If you want to uninstall algorithms, it is as simple as: - [garage](algorithms/arrays/garage.py) - [josephus_problem](algorithms/arrays/josephus_problem.py) - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) + - [max_ones_index](algorithms/arrays/max_ones_index.py) - [merge_intervals](algorithms/arrays/merge_intervals.py) - [missing_ranges](algorithms/arrays/missing_ranges.py) - [plus_one](algorithms/arrays/plus_one.py) @@ -86,19 +87,21 @@ If you want to uninstall algorithms, it is as simple as: - [shortest_distance_from_all_buildings](algorithms/bfs/shortest_distance_from_all_buildings.py) - [word_ladder](algorithms/bfs/word_ladder.py) - [bit](algorithms/bit) + - [add_bitwise_operator](algorithms/bit/add_bitwise_operator.py) + - [bit_operation](algorithms/bit/bit_operation.py) - [bytes_int_conversion](algorithms/bit/bytes_int_conversion.py) + - [count_flips_to_convert](algorithms/bit/count_flips_to_convert.py) - [count_ones](algorithms/bit/count_ones.py) + - [find_difference](algorithms/bit/find_difference.py) - [find_missing_number](algorithms/bit/find_missing_number.py) + - [flip_bit_longest_sequence](algorithms/bit/flip_bit_longest_sequence.py) - [power_of_two](algorithms/bit/power_of_two.py) - [reverse_bits](algorithms/bit/reverse_bits.py) - [single_number](algorithms/bit/single_number.py) - [single_number2](algorithms/bit/single_number2.py) - [single_number3](algorithms/bit/single_number3.py) - [subsets](algorithms/bit/subsets.py) - - [add_bitwise_operator](algorithms/bit/add_bitwise_operator.py) - - [bit_operation](algorithms/bit/bit_operation.py) - [swap_pair](algorithms/bit/swap_pair.py) - - [find_difference](algorithms/bit/find_difference.py) - [has_alternative_bit](algorithms/bit/has_alternative_bit.py) - [insert_bit](algorithms/bit/insert_bit.py) - [remove_bit](algorithms/bit/remove_bit.py) diff --git a/README_CN.md b/README_CN.md index bd0f31391..cccfd5dfc 100644 --- a/README_CN.md +++ b/README_CN.md @@ -1,4 +1,4 @@ -[English](https://github.com/yunshuipiao/algorithms/blob/master/README.md) | 简体中文 | [日本語](README_JP.md) +[English](README.md) | 简体中文 | [Deutsch](README_GE.md) | [日本語](README_JP.md) Python版数据结构和算法 ========================================= @@ -70,7 +70,8 @@ pip3 uninstall -y algorithms - [flatten：数组降维](algorithms/arrays/flatten.py) - [garage：停车场](algorithms/arrays/garage.py) - [josephus_problem: 约瑟夫问题](algorithms/arrays/josephus_problem.py) - - [longest_non_repeat：最长不重复子串](algorithms/arrays/longest_non_repeat.py/) + - [max_ones_index](algorithms/arrays/max_ones_index.py) + - [longest_non_repeat：最长不重复子串](algorithms/arrays/longest_non_repeat.py/) - [merge_intervals：合并重叠间隔](algorithms/arrays/merge_intervals.py) - [missing_ranges：遗失的范围](algorithms/arrays/missing_ranges.py) - [plus_one：加一运算](algorithms/arrays/plus_one.py) @@ -101,7 +102,9 @@ pip3 uninstall -y algorithms - [bit：位操作](algorithms/bit) - [bytes_int_conversion：字节整数转换](algorithms/bit/bytes_int_conversion.py) - [count_ones：统计1出现的次数](algorithms/bit/count_ones.py) + - [count_flips_to_convert](algorithms/bit/count_flips_to_convert.py) - [find_missing_number：寻找缺失数](algorithms/bit/find_missing_number.py) + - [flip_bit_longest_sequence](algorithms/bit/flip_bit_longest_sequence.py) - [power_of_two：2的n次方数判断](algorithms/bit/power_of_two.py) - [reverse_bits：反转位](algorithms/bit/reverse_bits.py) - [single_number2：寻找出现1次的数（2)](algorithms/bit/single_number2.py) diff --git a/README_GE.md b/README_GE.md index 3c14f99f2..d4287c35b 100644 --- a/README_GE.md +++ b/README_GE.md @@ -1,4 +1,4 @@ -[English](README.md) | [简体中文](https://github.com/yunshuipiao/algorithms/blob/master/README_CN.md) | Deutsch | [日本語](README_JP.md) +[English](README.md) | [简体中文](README_CN.md) | Deutsch | [日本語](README_JP.md) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) [![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) @@ -65,6 +65,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [garage](algorithms/arrays/garage.py) - [josephus_problem](algorithms/arrays/josephus_problem.py) - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) + - [max_ones_index](algorithms/arrays/max_ones_index.py) - [merge_intervals](algorithms/arrays/merge_intervals.py) - [missing_ranges](algorithms/arrays/missing_ranges.py) - [plus_one](algorithms/arrays/plus_one.py) @@ -95,7 +96,9 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [bit](algorithms/bit) - [bytes_int_conversion](algorithms/bit/bytes_int_conversion.py) - [count_ones](algorithms/bit/count_ones.py) + - [count_flips_to_convert](algorithms/bit/count_flips_to_convert.py) - [find_missing_number](algorithms/bit/find_missing_number.py) + - [flip_bit_longest_sequence](algorithms/bit/flip_bit_longest_sequence.py) - [power_of_two](algorithms/bit/power_of_two.py) - [reverse_bits](algorithms/bit/reverse_bits.py) - [single_number](algorithms/bit/single_number.py) diff --git a/README_JP.md b/README_JP.md index 352d728fe..316a82cb9 100644 --- a/README_JP.md +++ b/README_JP.md @@ -54,6 +54,7 @@ if __name__ == "__main__": - [flatten](arrays/flatten.py) - [garage](arrays/garage.py) - [josephus_problem](arrays/josephus_problem.py) + - [max_ones_index](algorithms/arrays/max_ones_index.py) - [longest_non_repeat](arrays/longest_non_repeat.py/) - [merge_intervals](arrays/merge_intervals.py) - [missing_ranges](arrays/missing_ranges.py) @@ -85,7 +86,9 @@ if __name__ == "__main__": - [bit : ビット](bit) - [bytes_int_conversion](bit/bytes_int_conversion.py) - [count_ones](bit/count_ones.py) + - [count_flips_to_convert](algorithms/bit/count_flips_to_convert.py) - [find_missing_number](bit/find_missing_number.py) + - [flip_bit_longest_sequence](algorithms/bit/flip_bit_longest_sequence.py) - [power_of_two](bit/power_of_two.py) - [reverse_bits](bit/reverse_bits.py) - [single_number](bit/single_number.py) diff --git a/algorithms/arrays/__init__.py b/algorithms/arrays/__init__.py index 04afdb2f9..64ba13065 100644 --- a/algorithms/arrays/__init__.py +++ b/algorithms/arrays/__init__.py @@ -3,6 +3,7 @@ from .garage import * from .josephus import * from .longest_non_repeat import * +from .max_ones_index import * from .merge_intervals import * from .missing_ranges import * from .move_zeros import * diff --git a/algorithms/arrays/max_ones_index.py b/algorithms/arrays/max_ones_index.py new file mode 100644 index 000000000..bee1f760d --- /dev/null +++ b/algorithms/arrays/max_ones_index.py @@ -0,0 +1,43 @@ +""" +Find the index of 0 to be replaced with 1 to get +longest continuous sequence +of 1s in a binary array. +Returns index of 0 to be +replaced with 1 to get longest +continuous sequence of 1s. +If there is no 0 in array, then +it returns -1. + +e.g. +let input array = [1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1] +If we replace 0 at index 3 with 1, we get the longest continuous +sequence of 1s in the array. +So the function return => 3 +""" + + +def max_ones_index(arr): + + n = len(arr) + max_count = 0 + max_index = 0 + prev_zero = -1 + prev_prev_zero = -1 + + for curr in range(n): + + # If current element is 0, + # then calculate the difference + # between curr and prev_prev_zero + if arr[curr] == 0: + if curr - prev_prev_zero > max_count: + max_count = curr - prev_prev_zero + max_index = prev_zero + + prev_prev_zero = prev_zero + prev_zero = curr + + if n - prev_prev_zero > max_count: + max_index = prev_zero + + return max_index \ No newline at end of file diff --git a/algorithms/bit/__init__.py b/algorithms/bit/__init__.py index 7cd175f6a..383923d46 100644 --- a/algorithms/bit/__init__.py +++ b/algorithms/bit/__init__.py @@ -13,3 +13,5 @@ from .has_alternative_bit import * from .insert_bit import * from .remove_bit import * +from .count_flips_to_convert import * +from .flip_bit_longest_sequence import * diff --git a/algorithms/bit/count_flips_to_convert.py b/algorithms/bit/count_flips_to_convert.py new file mode 100644 index 000000000..6ba1d116d --- /dev/null +++ b/algorithms/bit/count_flips_to_convert.py @@ -0,0 +1,19 @@ +""" +Write a function to determine the number of bits you would need to +flip to convert integer A to integer B. +For example: +Input: 29 (or: 11101), 15 (or: 01111) +Output: 2 +""" + + +def count_flips_to_convert(a, b): + + diff = a ^ b + + # count number of ones in diff + count = 0 + while diff: + diff &= (diff - 1) + count += 1 + return count diff --git a/algorithms/bit/flip_bit_longest_sequence.py b/algorithms/bit/flip_bit_longest_sequence.py new file mode 100644 index 000000000..a952edb3e --- /dev/null +++ b/algorithms/bit/flip_bit_longest_sequence.py @@ -0,0 +1,30 @@ +""" +You have an integer and you can flip exactly one bit from a 0 to 1. +Write code to find the length of the longest sequence of 1s you could create. +For example: +Input: 1775 ( or: 11011101111) +Output: 8 +""" + + +def flip_bit_longest_seq(num): + + curr_len = 0 + prev_len = 0 + max_len = 0 + + while num: + if num & 1 == 1: # last digit is 1 + curr_len += 1 + + elif num & 1 == 0: # last digit is 0 + if num & 2 == 0: # second last digit is 0 + prev_len = 0 + else: + prev_len = curr_len + curr_len = 0 + + max_len = max(max_len, prev_len + curr_len) + num = num >> 1 # right shift num + + return max_len + 1 diff --git a/tests/test_array.py b/tests/test_array.py index 88cf59173..ed398bca7 100644 --- a/tests/test_array.py +++ b/tests/test_array.py @@ -1,16 +1,19 @@ -from algorithms.arrays import delete_nth, delete_nth_naive -from algorithms.arrays import flatten, flatten_iter -from algorithms.arrays import garage -from algorithms.arrays import josephus -from algorithms.arrays import longest_non_repeat_v1, longest_non_repeat_v2 -from algorithms.arrays import Interval, merge_intervals -from algorithms.arrays import missing_ranges -from algorithms.arrays import move_zeros -from algorithms.arrays import plus_one_v1, plus_one_v2, plus_one_v3 -from algorithms.arrays import rotate_v1, rotate_v2, rotate_v3 -from algorithms.arrays import summarize_ranges -from algorithms.arrays import three_sum -from algorithms.arrays import two_sum +from algorithms.arrays import ( + delete_nth, delete_nth_naive, + flatten_iter, flatten, + garage, + josephus, + longest_non_repeat_v1, longest_non_repeat_v2, + Interval, merge_intervals, + missing_ranges, + move_zeros, + plus_one_v1, plus_one_v2, plus_one_v3, + rotate_v1, rotate_v2, rotate_v3, + summarize_ranges, + three_sum, + two_sum, + max_ones_index +) import unittest @@ -152,6 +155,15 @@ def test_longest_non_repeat_v2(self): self.assertEqual(longest_non_repeat_v2(string), 3) +class TestMaxOnesIndex(unittest.TestCase): + + def test_max_ones_index(self): + + self.assertEqual(9, max_ones_index([1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1])) + self.assertEqual(3, max_ones_index([1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1])) + self.assertEqual(-1, max_ones_index([1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1])) + + class TestMergeInterval(unittest.TestCase): def test_merge(self): diff --git a/tests/test_bit.py b/tests/test_bit.py index 01290c2f3..fdc80a18e 100644 --- a/tests/test_bit.py +++ b/tests/test_bit.py @@ -1,7 +1,9 @@ from algorithms.bit import ( add_bitwise_operator, count_ones_iter, count_ones_recur, + count_flips_to_convert, find_missing_number, find_missing_number2, + flip_bit_longest_seq, is_power_of_two, reverse_bits, single_number, @@ -19,8 +21,13 @@ import unittest import random + class TestSuite(unittest.TestCase): + def setUp(self): + """Initialize seed.""" + random.seed("test") + def test_add_bitwise_operator(self): self.assertEqual(5432 + 97823, add_bitwise_operator(5432, 97823)) self.assertEqual(0, add_bitwise_operator(0, 0)) @@ -55,9 +62,15 @@ def test_count_ones_iter(self): # 0 -> 0 self.assertEqual(0, count_ones_iter(0)) - def setUp(self): - """Initialize seed.""" - random.seed("test") + def test_count_flips_to_convert(self): + # 29: 11101 and 15: 01111 + self.assertEqual(2, count_flips_to_convert(29, 15)) + # 45: 0000101101 and 987: 1111011011 + self.assertEqual(8, count_flips_to_convert(45, 987)) + # 34: 100010 + self.assertEqual(0, count_flips_to_convert(34, 34)) + # 34: 100010 and 53: 110101 + self.assertEqual(4, count_flips_to_convert(34, 53)) def test_find_missing_number(self): @@ -79,6 +92,16 @@ def test_find_missing_number2(self): random.shuffle(nums) self.assertEqual(12345, find_missing_number2(nums)) + def test_flip_bit_longest_seq(self): + # 1775: 11011101111 + self.assertEqual(8, flip_bit_longest_seq(1775)) + # 5: 101 + self.assertEqual(3, flip_bit_longest_seq(5)) + # 71: 1000111 + self.assertEqual(4, flip_bit_longest_seq(71)) + # 0: 0 + self.assertEqual(1, flip_bit_longest_seq(0)) + def test_is_power_of_two(self): self.assertTrue(is_power_of_two(64)) @@ -215,5 +238,6 @@ def test_remove_bit(self): self.assertEqual(5, remove_bit(21, 4)) self.assertEqual(10, remove_bit(21, 0)) + if __name__ == '__main__': unittest.main() From 942c027097be7b65b747cfd5efd92bab5c01048a Mon Sep 17 00:00:00 2001 From: Lee Geon Date: Sat, 2 Jun 2018 18:09:15 +0900 Subject: [PATCH 311/387] Update README for bucket and shell sort (#298) * Update README.md * Update README_JP.md * Update README_JP.md * Update README_GE.md * Update README_CN.md --- README.md | 2 + README_CN.md | 2 + README_GE.md | 2 + README_JP.md | 510 ++++++++++++++++++++++++++------------------------- 4 files changed, 262 insertions(+), 254 deletions(-) diff --git a/README.md b/README.md index 83547b14a..b33ca6002 100644 --- a/README.md +++ b/README.md @@ -217,6 +217,7 @@ If you want to uninstall algorithms, it is as simple as: - [set_covering](algorithms/set/set_covering.py) - [sort](algorithms/sort) - [bubble_sort](algorithms/sort/bubble_sort.py) + - [bucket_sort](algorithms/sort/bucket_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) - [heap_sort](algorithms/sort/heap_sort.py) @@ -225,6 +226,7 @@ If you want to uninstall algorithms, it is as simple as: - [merge_sort](algorithms/sort/merge_sort.py) - [quick_sort](algorithms/sort/quick_sort.py) - [selection_sort](algorithms/sort/selection_sort.py) + - [shell_sort](algorithms/sort/shell_sort.py) - [sort_colors](algorithms/sort/sort_colors.py) - [topsort](algorithms/sort/topsort.py) - [wiggle_sort](algorithms/sort/wiggle_sort.py) diff --git a/README_CN.md b/README_CN.md index cccfd5dfc..166414b84 100644 --- a/README_CN.md +++ b/README_CN.md @@ -199,6 +199,7 @@ pip3 uninstall -y algorithms - [set_covering：集合覆盖](algorithms/set/set_covering.py) - [sort：排序](algorithms/sort) - [bubble_sort：冒泡排序](algorithms/sort/bubble_sort.py) + - [bucket_sort](algorithms/sort/bucket_sort.py) - [comb_sort：梳排序](algorithms/sort/comb_sort.py) - [counting_sort：计数排序](algorithms/sort/counting_sort.py) - [heap_sort：堆排序](algorithms/sort/heap_sort.py) @@ -207,6 +208,7 @@ pip3 uninstall -y algorithms - [merge_sort：归并排序](algorithms/sort/merge_sort.py) - [quick_sort：快速排序](algorithms/sort/quick_sort.py) - [selection_sort：选择排序](algorithms/sort/selection_sort.py) + - [shell_sort](algorithms/sort/shell_sort.py) - [sort_colors：颜色排序](algorithms/sort/sort_colors.py) - [topsort：top排序](algorithms/sort/topsort.py) - [wiggle_sort：摇摆排序](algorithms/sort/wiggle_sort.py) diff --git a/README_GE.md b/README_GE.md index d4287c35b..02cfdb906 100644 --- a/README_GE.md +++ b/README_GE.md @@ -224,6 +224,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [set_covering](algorithms/set/set_covering.py) - [sort](algorithms/sort) - [bubble_sort](algorithms/sort/bubble_sort.py) + - [bucket_sort](algorithms/sort/bucket_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) - [heap_sort](algorithms/sort/heap_sort.py) @@ -232,6 +233,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [merge_sort](algorithms/sort/merge_sort.py) - [quick_sort](algorithms/sort/quick_sort.py) - [selection_sort](algorithms/sort/selection_sort.py) + - [shell_sort](algorithms/sort/shell_sort.py) - [sort_colors](algorithms/sort/sort_colors.py) - [topsort](algorithms/sort/topsort.py) - [wiggle_sort](algorithms/sort/wiggle_sort.py) diff --git a/README_JP.md b/README_JP.md index 316a82cb9..4804b5fc5 100644 --- a/README_JP.md +++ b/README_JP.md @@ -49,263 +49,265 @@ if __name__ == "__main__": ## アルゴリズムのリスト -- [arrays : 配列](arrays) - - [delete_nth](arrays/delete_nth.py) - - [flatten](arrays/flatten.py) - - [garage](arrays/garage.py) - - [josephus_problem](arrays/josephus_problem.py) +- [arrays : 配列](algorithms/arrays) + - [delete_nth](algorithms/arrays/delete_nth.py) + - [flatten](algorithms/arrays/flatten.py) + - [garage](algorithms/arrays/garage.py) + - [josephus_problem](algorithms/arrays/josephus_problem.py) - [max_ones_index](algorithms/arrays/max_ones_index.py) - - [longest_non_repeat](arrays/longest_non_repeat.py/) - - [merge_intervals](arrays/merge_intervals.py) - - [missing_ranges](arrays/missing_ranges.py) - - [plus_one](arrays/plus_one.py) - - [rotate_array](arrays/rotate_array.py) - - [summary_ranges](arrays/summary_ranges.py) - - [three_sum](arrays/three_sum.py) - - [two_sum](arrays/two_sum.py) - - [move_zeros_to_end](arrays/move_zeros_to_end.py) -- [backtrack : バックトラッキング](backtrack) - - [general_solution.md](backtrack/) - - [anagram](backtrack/anagram.py) - - [array_sum_combinations](backtrack/array_sum_combinations.py) - - [combination_sum](backtrack/combination_sum.py) - - [expression_add_operators](backtrack/expression_add_operators.py) - - [factor_combinations](backtrack/factor_combinations.py) - - [generate_abbreviations](backtrack/generate_abbreviations.py) - - [generate_parenthesis](backtrack/generate_parenthesis.py) - - [letter_combination](backtrack/letter_combination.py) - - [palindrome_partitioning](backtrack/palindrome_partitioning.py) - - [pattern_match](backtrack/pattern_match.py) - - [permute](backtrack/permute.py) - - [permute_unique](backtrack/permute_unique.py) - - [subsets](backtrack/subsets.py) - - [subsets_unique](backtrack/subsets_unique.py) -- [bfs : 幅優先探索](bfs) - - [shortest_distance_from_all_buildings](bfs/shortest_distance_from_all_buildings.py) - - [word_ladder](bfs/word_ladder.py) -- [bit : ビット](bit) - - [bytes_int_conversion](bit/bytes_int_conversion.py) - - [count_ones](bit/count_ones.py) + - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) + - [merge_intervals](algorithms/arrays/merge_intervals.py) + - [missing_ranges](algorithms/arrays/missing_ranges.py) + - [plus_one](algorithms/arrays/plus_one.py) + - [rotate_array](algorithms/arrays/rotate_array.py) + - [summary_ranges](algorithms/arrays/summary_ranges.py) + - [three_sum](algorithms/arrays/three_sum.py) + - [two_sum](algorithms/arrays/two_sum.py) + - [move_zeros_to_end](algorithms/arrays/move_zeros_to_end.py) +- [backtrack : バックトラッキング](algorithms/backtrack) + - [general_solution.md](algorithms/backtrack/) + - [anagram](algorithms/backtrack/anagram.py) + - [array_sum_combinations](algorithms/backtrack/array_sum_combinations.py) + - [combination_sum](algorithms/backtrack/combination_sum.py) + - [expression_add_operators](algorithms/backtrack/expression_add_operators.py) + - [factor_combinations](algorithms/backtrack/factor_combinations.py) + - [generate_abbreviations](algorithms/backtrack/generate_abbreviations.py) + - [generate_parenthesis](algorithms/backtrack/generate_parenthesis.py) + - [letter_combination](algorithms/backtrack/letter_combination.py) + - [palindrome_partitioning](algorithms/backtrack/palindrome_partitioning.py) + - [pattern_match](algorithms/backtrack/pattern_match.py) + - [permute](algorithms/backtrack/permute.py) + - [permute_unique](algorithms/backtrack/permute_unique.py) + - [subsets](algorithms/backtrack/subsets.py) + - [subsets_unique](algorithms/backtrack/subsets_unique.py) +- [bfs : 幅優先探索](algorithms/bfs) + - [shortest_distance_from_all_buildings](algorithms/bfs/shortest_distance_from_all_buildings.py) + - [word_ladder](algorithms/bfs/word_ladder.py) +- [bit : ビット](algorithms/bit) + - [bytes_int_conversion](algorithms/bit/bytes_int_conversion.py) + - [count_ones](algorithms/bit/count_ones.py) - [count_flips_to_convert](algorithms/bit/count_flips_to_convert.py) - - [find_missing_number](bit/find_missing_number.py) + - [find_missing_number](algorithms/bit/find_missing_number.py) - [flip_bit_longest_sequence](algorithms/bit/flip_bit_longest_sequence.py) - - [power_of_two](bit/power_of_two.py) - - [reverse_bits](bit/reverse_bits.py) - - [single_number](bit/single_number.py) - - [single_number2](bit/single_number2.py) - - [single_number3](bit/single_number3.py) - - [subsets](bit/subsets.py) - - [add_bitwise_operator](bit/add_bitwise_operator.py) - - [bit_operation](bit/bit_operation.py) - - [swap_pair](bit/swap_pair.py) - - [find_difference](bit/find_difference.py) - - [has_alternative_bit](bit/has_alternative_bit.py) - - [insert_bit](bit/insert_bit.py) - - [remove_bit](bit/remove_bit.py) -- [calculator : 計算機](calculator) - - [math_parser](calculator/math_parser.py) -- [dfs : 深さ優先探索](dfs) - - [all_factors](dfs/all_factors.py) - - [count_islands](dfs/count_islands.py) - - [pacific_atlantic](dfs/pacific_atlantic.py) - - [sudoku_solver](dfs/sudoku_solver.py) - - [walls_and_gates](dfs/walls_and_gates.py) -- [dp : 動的計画法](dp) - - [buy_sell_stock](dp/buy_sell_stock.py) - - [climbing_stairs](dp/climbing_stairs.py) - - [coin_change](dp/coin_change.py) - - [combination_sum](dp/combination_sum.py) - - [egg_drop](dp/egg_drop.py) - - [house_robber](dp/house_robber.py) - - [job_scheduling](dp/job_scheduling.py) - - [knapsack](dp/knapsack.py) - - [longest_increasing](dp/longest_increasing.py) - - [matrix_chain_order](dp/matrix_chain_order.py) - - [max_product_subarray](dp/max_product_subarray.py) - - [max_subarray](dp/max_subarray.py) - - [min_cost_path](dp/min_cost_path.py) - - [num_decodings](dp/num_decodings.py) - - [regex_matching](dp/regex_matching.py) - - [rod_cut](dp/rod_cut.py) - - [word_break](dp/word_break.py) - - [fibonacci](dp/fib.py) -- [graph : グラフ](graph) - - [strongly_connected](graph/checkDiGraphStronglyConnected.py) - - [clone_graph](graph/clone_graph.py) - - [cycle_detection](graph/cycle_detection.py) - - [find_all_cliques](graph/find_all_cliques.py) - - [find_path](graph/find_path.py) - - [graph](graph/graph.py) - - [markov_chain](graph/markov_chain.py) - - [minimum_spanning_tree](graph/minimum_spanning_tree.py) - - [satisfiability](graph/satisfiability.py) - - [tarjan](graph/tarjan.py) - - [traversal](graph/traversal.py) -- [heap : ヒープ](heap) - - [merge_sorted_k_lists](heap/merge_sorted_k_lists.py) - - [skyline](heap/skyline.py) - - [sliding_window_max](heap/sliding_window_max.py) - - [binary_heap](heap/binary_heap.py) -- [linkedlist : 連結リスト](linkedlist) - - [add_two_numbers](linkedlist/add_two_numbers.py) - - [copy_random_pointer](linkedlist/copy_random_pointer.py) - - [delete_node](linkedlist/delete_node.py) - - [first_cyclic_node](linkedlist/first_cyclic_node.py) - - [is_cyclic](linkedlist/is_cyclic.py) - - [is_palindrome](linkedlist/is_palindrome.py) - - [kth_to_last](linkedlist/kth_to_last.py) - - [linkedlist](linkedlist/linkedlist.py) - - [remove_duplicates](linkedlist/remove_duplicates.py) - - [reverse](linkedlist/reverse.py) - - [rotate_list](linkedlist/rotate_list.py) - - [swap_in_pairs](linkedlist/swap_in_pairs.py) - - [is_sorted](linkedlist/is_sorted.py) - - [remove_range](linkedlist/remove_range.py) -- [map : マップ](map) - - [hashtable](map/hashtable.py) - - [separate_chaining_hashtable](map/separate_chaining_hashtable.py) - - [longest_common_subsequence](map/longest_common_subsequence.py) - - [randomized_set](map/randomized_set.py) - - [valid_sudoku](map/valid_sudoku.py) -- [maths : 数学](maths) - - [base_conversion](maths/base_conversion.py) - - [extended_gcd](maths/extended_gcd.py) - - [gcd/lcm](maths/gcd.py) - - [generate_strobogrammtic](maths/generate_strobogrammtic.py) - - [is_strobogrammatic](maths/is_strobogrammatic.py) - - [next_bigger](maths/next_bigger.py) - - [next_perfect_square](maths/next_perfect_square.py) - - [nth_digit](maths/nth_digit.py) - - [prime_check](maths/prime_check.py) - - [primes_sieve_of_eratosthenes](maths/primes_sieve_of_eratosthenes.py) - - [pythagoras](maths/pythagoras.py) - - [rabin_miller](maths/rabin_miller.py) - - [rsa](maths/rsa.py) - - [sqrt_precision_factor](maths/sqrt_precision_factor.py) - - [summing_digits](maths/summing_digits.py) -- [matrix : 行列](matrix) - - [sudoku_validator](matrix/sudoku_validator.py) - - [bomb_enemy](matrix/bomb_enemy.py) - - [copy_transform](matrix/copy_transform.py) - - [count_paths](matrix/count_paths.py) - - [matrix_rotation.txt](matrix/matrix_rotation.txt) - - [rotate_image](matrix/rotate_image.py) - - [search_in_sorted_matrix](matrix/search_in_sorted_matrix.py) - - [sparse_dot_vector](matrix/sparse_dot_vector.py) - - [sparse_mul](matrix/sparse_mul.py) - - [spiral_traversal](matrix/spiral_traversal.py) -- [queues : キュー](queues) - - [max_sliding_window](queues/max_sliding_window.py) - - [moving_average](queues/moving_average.py) - - [queue](queues/queue.py) - - [reconstruct_queue](queues/reconstruct_queue.py) - - [zigzagiterator](queues/zigzagiterator.py) -- [search : サーチ](search) - - [binary_search](search/binary_search.py) - - [first_occurance](search/first_occurance.py) - - [last_occurance](search/last_occurance.py) - - [search_insert](search/search_insert.py) - - [two_sum](search/two_sum.py) - - [search_range](search/search_range.py) - - [find_min_rotate](search/find_min_rotate.py) - - [search_rotate](search/search_rotate.py) -- [set : セット](set) - - [randomized_set](set/randomized_set.py) - - [set_covering](set/set_covering.py) -- [sort : ソート](sort) - - [bubble_sort](sort/bubble_sort.py) - - [comb_sort](sort/comb_sort.py) - - [counting_sort](sort/counting_sort.py) - - [heap_sort](sort/heap_sort.py) - - [insertion_sort](sort/insertion_sort.py) - - [meeting_rooms](sort/meeting_rooms.py) - - [merge_sort](sort/merge_sort.py) - - [quick_sort](sort/quick_sort.py) - - [selection_sort](sort/selection_sort.py) - - [sort_colors](sort/sort_colors.py) - - [topsort](sort/topsort.py) - - [wiggle_sort](sort/wiggle_sort.py) -- [stack : スタック](stack) - - [longest_abs_path](stack/longest_abs_path.py) - - [simplify_path](stack/simplify_path.py) - - [stack](stack/stack.py) - - [valid_parenthesis](stack/valid_parenthesis.py) - - [stutter](stack/stutter.py) - - [switch_pairs](stack/switch_pairs.py) - - [is_consecutive](stack/is_consecutive.py) - - [remove_min](stack/remove_min.py) - - [is_sorted](stack/is_sorted.py) -- [strings : 文字列](strings) - - [fizzbuzz](strings/fizzbuzz.py) - - [delete_reoccurring_characters](strings/delete_reoccurring_characters.py) - - [strip_url_params](strings/strip_url_params.py) - - [validate_coordinates](strings/validate_coordinates.py) - - [domain_extractor](strings/domain_extractor.py) - - [merge_string_checker](strings/merge_string_checker.py) - - [add_binary](strings/add_binary.py) - - [breaking_bad](strings/breaking_bad.py) - - [decode_string](strings/decode_string.py) - - [encode_decode](strings/encode_decode.py) - - [group_anagrams](strings/group_anagrams.py) - - [int_to_roman](strings/int_to_roman.py) - - [is_palindrome](strings/is_palindrome.py) - - [license_number](strings/license_number.py) - - [make_sentence](strings/make_sentence.py) - - [multiply_strings](strings/multiply_strings.py) - - [one_edit_distance](strings/one_edit_distance.py) - - [rabin_karp](strings/rabin_karp.py) - - [reverse_string](strings/reverse_string.py) - - [reverse_vowel](strings/reverse_vowel.py) - - [reverse_words](strings/reverse_words.py) - - [roman_to_int](strings/roman_to_int.py) - - [word_squares](strings/word_squares.py) -- [tree : 木構造](tree) - - [bst](tree/tree/bst) - - [array2bst](tree/bst/array2bst.py) - - [bst_closest_value](tree/bst/bst_closest_value.py) - - [BSTIterator](tree/bst/BSTIterator.py) - - [delete_node](tree/bst/delete_node.py) - - [is_bst](tree/bst/is_bst.py) - - [kth_smallest](tree/bst/kth_smallest.py) - - [lowest_common_ancestor](tree/bst/lowest_common_ancestor.py) - - [predecessor](tree/bst/predecessor.py) - - [serialize_deserialize](tree/bst/serialize_deserialize.py) - - [successor](tree/bst/successor.py) - - [unique_bst](tree/bst/unique_bst.py) - - [depth_sum](tree/bst/depth_sum.py) - - [count_left_node](tree/bst/count_left_node.py) - - [num_empty](tree/bst/num_empty.py) - - [height](tree/bst/height.py) - - [red_black_tree](tree/red_black_tree) - - [red_black_tree](tree/red_black_tree/red_black_tree.py) - - [segment_tree](tree/segment_tree) - - [segment_tree](tree/segment_tree/segment_tree.py) - - [traversal](tree/traversal) - - [inorder](tree/traversal/inorder.py) - - [level_order](tree/traversal/level_order.py) - - [zigzag](tree/traversal/zigzag.py) - - [trie](tree/trie) - - [add_and_search](tree/trie/add_and_search.py) - - [trie](tree/trie/trie.py) - - [binary_tree_paths](tree/binary_tree_paths.py) - - [bintree2list](tree/bintree2list.py) - - [deepest_left](tree/deepest_left.py) - - [invert_tree](tree/invert_tree.py) - - [is_balanced](tree/is_balanced.py) - - [is_subtree](tree/is_subtree.py) - - [is_symmetric](tree/is_symmetric.py) - - [longest_consecutive](tree/longest_consecutive.py) - - [lowest_common_ancestor](tree/lowest_common_ancestor.py) - - [max_height](tree/max_height.py) - - [max_path_sum](tree/max_path_sum.py) - - [min_height](tree/min_height.py) - - [path_sum](tree/path_sum.py) - - [path_sum2](tree/path_sum2.py) - - [pretty_print](tree/pretty_print.py) - - [same_tree](tree/same_tree.py) - - [tree](tree/tree.py) -- [union-find : 素集合データ構造](union-find) - - [count_islands](union-find/count_islands.py) + - [power_of_two](algorithms/bit/power_of_two.py) + - [reverse_bits](algorithms/bit/reverse_bits.py) + - [single_number](algorithms/bit/single_number.py) + - [single_number2](algorithms/bit/single_number2.py) + - [single_number3](algorithms/bit/single_number3.py) + - [subsets](algorithms/bit/subsets.py) + - [add_bitwise_operator](algorithms/bit/add_bitwise_operator.py) + - [bit_operation](algorithms/bit/bit_operation.py) + - [swap_pair](algorithms/bit/swap_pair.py) + - [find_difference](algorithms/bit/find_difference.py) + - [has_alternative_bit](algorithms/bit/has_alternative_bit.py) + - [insert_bit](algorithms/bit/insert_bit.py) + - [remove_bit](algorithms/bit/remove_bit.py) +- [calculator : 計算機](algorithms/calculator) + - [math_parser](algorithms/calculator/math_parser.py) +- [dfs : 深さ優先探索](algorithms/dfs) + - [all_factors](algorithms/dfs/all_factors.py) + - [count_islands](algorithms/dfs/count_islands.py) + - [pacific_atlantic](algorithms/dfs/pacific_atlantic.py) + - [sudoku_solver](algorithms/dfs/sudoku_solver.py) + - [walls_and_gates](algorithms/dfs/walls_and_gates.py) +- [dp : 動的計画法](algorithms/dp) + - [buy_sell_stock](algorithms/dp/buy_sell_stock.py) + - [climbing_stairs](algorithms/dp/climbing_stairs.py) + - [coin_change](algorithms/dp/coin_change.py) + - [combination_sum](algorithms/dp/combination_sum.py) + - [egg_drop](algorithms/dp/egg_drop.py) + - [house_robber](algorithms/dp/house_robber.py) + - [job_scheduling](algorithms/dp/job_scheduling.py) + - [knapsack](algorithms/dp/knapsack.py) + - [longest_increasing](algorithms/dp/longest_increasing.py) + - [matrix_chain_order](algorithms/dp/matrix_chain_order.py) + - [max_product_subarray](algorithms/dp/max_product_subarray.py) + - [max_subarray](algorithms/dp/max_subarray.py) + - [min_cost_path](algorithms/dp/min_cost_path.py) + - [num_decodings](algorithms/dp/num_decodings.py) + - [regex_matching](algorithms/dp/regex_matching.py) + - [rod_cut](algorithms/dp/rod_cut.py) + - [word_break](algorithms/dp/word_break.py) + - [fibonacci](algorithms/dp/fib.py) +- [graph : グラフ](algorithms/graph) + - [strongly_connected](algorithms/graph/checkDiGraphStronglyConnected.py) + - [clone_graph](algorithms/graph/clone_graph.py) + - [cycle_detection](algorithms/graph/cycle_detection.py) + - [find_all_cliques](algorithms/graph/find_all_cliques.py) + - [find_path](algorithms/graph/find_path.py) + - [graph](algorithms/graph/graph.py) + - [markov_chain](algorithms/graph/markov_chain.py) + - [minimum_spanning_tree](algorithms/graph/minimum_spanning_tree.py) + - [satisfiability](algorithms/graph/satisfiability.py) + - [tarjan](algorithms/graph/tarjan.py) + - [traversal](algorithms/graph/traversal.py) +- [heap : ヒープ](algorithms/heap) + - [merge_sorted_k_lists](algorithms/heap/merge_sorted_k_lists.py) + - [skyline](algorithms/heap/skyline.py) + - [sliding_window_max](algorithms/heap/sliding_window_max.py) + - [binary_heap](algorithms/heap/binary_heap.py) +- [linkedlist : 連結リスト](algorithms/linkedlist) + - [add_two_numbers](algorithms/linkedlist/add_two_numbers.py) + - [copy_random_pointer](algorithms/linkedlist/copy_random_pointer.py) + - [delete_node](algorithms/linkedlist/delete_node.py) + - [first_cyclic_node](algorithms/linkedlist/first_cyclic_node.py) + - [is_cyclic](algorithms/linkedlist/is_cyclic.py) + - [is_palindrome](algorithms/linkedlist/is_palindrome.py) + - [kth_to_last](algorithms/linkedlist/kth_to_last.py) + - [linkedlist](algorithms/linkedlist/linkedlist.py) + - [remove_duplicates](algorithms/linkedlist/remove_duplicates.py) + - [reverse](algorithms/linkedlist/reverse.py) + - [rotate_list](algorithms/linkedlist/rotate_list.py) + - [swap_in_pairs](algorithms/linkedlist/swap_in_pairs.py) + - [is_sorted](algorithms/linkedlist/is_sorted.py) + - [remove_range](algorithms/linkedlist/remove_range.py) +- [map : マップ](algorithms/map) + - [hashtable](algorithms/map/hashtable.py) + - [separate_chaining_hashtable](algorithms/map/separate_chaining_hashtable.py) + - [longest_common_subsequence](algorithms/map/longest_common_subsequence.py) + - [randomized_set](algorithms/map/randomized_set.py) + - [valid_sudoku](algorithms/map/valid_sudoku.py) +- [maths : 数学](algorithms/maths) + - [base_conversion](algorithms/maths/base_conversion.py) + - [extended_gcd](algorithms/maths/extended_gcd.py) + - [gcd/lcm](algorithms/maths/gcd.py) + - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) + - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py) + - [next_bigger](algorithms/maths/next_bigger.py) + - [next_perfect_square](algorithms/maths/next_perfect_square.py) + - [nth_digit](algorithms/maths/nth_digit.py) + - [prime_check](algorithms/maths/prime_check.py) + - [primes_sieve_of_eratosthenes](algorithms/maths/primes_sieve_of_eratosthenes.py) + - [pythagoras](algorithms/maths/pythagoras.py) + - [rabin_miller](algorithms/maths/rabin_miller.py) + - [rsa](algorithms/maths/rsa.py) + - [sqrt_precision_factor](algorithms/maths/sqrt_precision_factor.py) + - [summing_digits](algorithms/maths/summing_digits.py) +- [matrix : 行列](algorithms/matrix) + - [sudoku_validator](algorithms/matrix/sudoku_validator.py) + - [bomb_enemy](algorithms/matrix/bomb_enemy.py) + - [copy_transform](algorithms/matrix/copy_transform.py) + - [count_paths](algorithms/matrix/count_paths.py) + - [matrix_rotation.txt](algorithms/matrix/matrix_rotation.txt) + - [rotate_image](algorithms/matrix/rotate_image.py) + - [search_in_sorted_matrix](algorithms/matrix/search_in_sorted_matrix.py) + - [sparse_dot_vector](algorithms/matrix/sparse_dot_vector.py) + - [sparse_mul](algorithms/matrix/sparse_mul.py) + - [spiral_traversal](algorithms/matrix/spiral_traversal.py) +- [queues : キュー](algorithms/queues) + - [max_sliding_window](algorithms/queues/max_sliding_window.py) + - [moving_average](algorithms/queues/moving_average.py) + - [queue](algorithms/queues/queue.py) + - [reconstruct_queue](algorithms/queues/reconstruct_queue.py) + - [zigzagiterator](algorithms/queues/zigzagiterator.py) +- [search : サーチ](algorithms/search) + - [binary_search](algorithms/search/binary_search.py) + - [first_occurance](algorithms/search/first_occurance.py) + - [last_occurance](algorithms/search/last_occurance.py) + - [search_insert](algorithms/search/search_insert.py) + - [two_sum](algorithms/search/two_sum.py) + - [search_range](algorithms/search/search_range.py) + - [find_min_rotate](algorithms/search/find_min_rotate.py) + - [search_rotate](algorithms/search/search_rotate.py) +- [set : セット](algorithms/set) + - [randomized_set](algorithms/set/randomized_set.py) + - [set_covering](algorithms/set/set_covering.py) +- [sort : ソート](algorithms/sort) + - [bubble_sort](algorithms/sort/bubble_sort.py) + - [bucket_sort](algorithms/sort/bucket_sort.py) + - [comb_sort](algorithms/sort/comb_sort.py) + - [counting_sort](algorithms/sort/counting_sort.py) + - [heap_sort](algorithms/sort/heap_sort.py) + - [insertion_sort](algorithms/sort/insertion_sort.py) + - [meeting_rooms](algorithms/sort/meeting_rooms.py) + - [merge_sort](algorithms/sort/merge_sort.py) + - [quick_sort](algorithms/sort/quick_sort.py) + - [selection_sort](algorithms/sort/selection_sort.py) + - [shell_sort](algorithms/sort/shell_sort.py) + - [sort_colors](algorithms/sort/sort_colors.py) + - [topsort](algorithms/sort/topsort.py) + - [wiggle_sort](algorithms/sort/wiggle_sort.py) +- [stack : スタック](algorithms/stack) + - [longest_abs_path](algorithms/stack/longest_abs_path.py) + - [simplify_path](algorithms/stack/simplify_path.py) + - [stack](algorithms/stack/stack.py) + - [valid_parenthesis](algorithms/stack/valid_parenthesis.py) + - [stutter](algorithms/stack/stutter.py) + - [switch_pairs](algorithms/stack/switch_pairs.py) + - [is_consecutive](algorithms/stack/is_consecutive.py) + - [remove_min](algorithms/stack/remove_min.py) + - [is_sorted](algorithms/stack/is_sorted.py) +- [strings : 文字列](algorithms/strings) + - [fizzbuzz](algorithms/strings/fizzbuzz.py) + - [delete_reoccurring_characters](algorithms/strings/delete_reoccurring_characters.py) + - [strip_url_params](algorithms/strings/strip_url_params.py) + - [validate_coordinates](algorithms/strings/validate_coordinates.py) + - [domain_extractor](algorithms/strings/domain_extractor.py) + - [merge_string_checker](algorithms/strings/merge_string_checker.py) + - [add_binary](algorithms/strings/add_binary.py) + - [breaking_bad](algorithms/strings/breaking_bad.py) + - [decode_string](algorithms/strings/decode_string.py) + - [encode_decode](algorithms/strings/encode_decode.py) + - [group_anagrams](algorithms/strings/group_anagrams.py) + - [int_to_roman](algorithms/strings/int_to_roman.py) + - [is_palindrome](algorithms/strings/is_palindrome.py) + - [license_number](algorithms/strings/license_number.py) + - [make_sentence](algorithms/strings/make_sentence.py) + - [multiply_strings](algorithms/strings/multiply_strings.py) + - [one_edit_distance](algorithms/strings/one_edit_distance.py) + - [rabin_karp](algorithms/strings/rabin_karp.py) + - [reverse_string](algorithms/strings/reverse_string.py) + - [reverse_vowel](algorithms/strings/reverse_vowel.py) + - [reverse_words](algorithms/strings/reverse_words.py) + - [roman_to_int](algorithms/strings/roman_to_int.py) + - [word_squares](algorithms/strings/word_squares.py) +- [tree : 木構造](algorithms/tree) + - [bst](algorithms/tree/tree/bst) + - [array2bst](algorithms/tree/bst/array2bst.py) + - [bst_closest_value](algorithms/tree/bst/bst_closest_value.py) + - [BSTIterator](algorithms/tree/bst/BSTIterator.py) + - [delete_node](algorithms/tree/bst/delete_node.py) + - [is_bst](algorithms/tree/bst/is_bst.py) + - [kth_smallest](algorithms/tree/bst/kth_smallest.py) + - [lowest_common_ancestor](algorithms/tree/bst/lowest_common_ancestor.py) + - [predecessor](algorithms/tree/bst/predecessor.py) + - [serialize_deserialize](algorithms/tree/bst/serialize_deserialize.py) + - [successor](algorithms/tree/bst/successor.py) + - [unique_bst](algorithms/tree/bst/unique_bst.py) + - [depth_sum](algorithms/tree/bst/depth_sum.py) + - [count_left_node](algorithms/tree/bst/count_left_node.py) + - [num_empty](algorithms/tree/bst/num_empty.py) + - [height](algorithms/tree/bst/height.py) + - [red_black_tree](algorithms/tree/red_black_tree) + - [red_black_tree](algorithms/tree/red_black_tree/red_black_tree.py) + - [segment_tree](algorithms/tree/segment_tree) + - [segment_tree](algorithms/tree/segment_tree/segment_tree.py) + - [traversal](algorithms/tree/traversal) + - [inorder](algorithms/tree/traversal/inorder.py) + - [level_order](algorithms/tree/traversal/level_order.py) + - [zigzag](algorithms/tree/traversal/zigzag.py) + - [trie](algorithms/tree/trie) + - [add_and_search](algorithms/tree/trie/add_and_search.py) + - [trie](algorithms/tree/trie/trie.py) + - [binary_tree_paths](algorithms/tree/binary_tree_paths.py) + - [bintree2list](algorithms/tree/bintree2list.py) + - [deepest_left](algorithms/tree/deepest_left.py) + - [invert_tree](algorithms/tree/invert_tree.py) + - [is_balanced](algorithms/tree/is_balanced.py) + - [is_subtree](algorithms/tree/is_subtree.py) + - [is_symmetric](algorithms/tree/is_symmetric.py) + - [longest_consecutive](algorithms/tree/longest_consecutive.py) + - [lowest_common_ancestor](algorithms/tree/lowest_common_ancestor.py) + - [max_height](algorithms/tree/max_height.py) + - [max_path_sum](algorithms/tree/max_path_sum.py) + - [min_height](algorithms/tree/min_height.py) + - [path_sum](algorithms/tree/path_sum.py) + - [path_sum2](algorithms/tree/path_sum2.py) + - [pretty_print](algorithms/tree/pretty_print.py) + - [same_tree](algorithms/tree/same_tree.py) + - [tree](algorithms/tree/tree.py) +- [union-find : 素集合データ構造](algorithms/union-find) + - [count_islands](algorithms/union-find/count_islands.py) ## 貢献者 本リポジトリは次の方によって維持されています From cfc413232bdb82b696acf8272cb083e46e8527ef Mon Sep 17 00:00:00 2001 From: Conor Ryan Date: Sat, 2 Jun 2018 08:36:02 -0700 Subject: [PATCH 312/387] FIX README.md to correct link for the Arrays / Josephus Problem (#299) --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index b33ca6002..6006ba14a 100644 --- a/README.md +++ b/README.md @@ -56,7 +56,7 @@ If you want to uninstall algorithms, it is as simple as: - [delete_nth](algorithms/arrays/delete_nth.py) - [flatten](algorithms/arrays/flatten.py) - [garage](algorithms/arrays/garage.py) - - [josephus_problem](algorithms/arrays/josephus_problem.py) + - [josephus_problem](algorithms/arrays/josephus.py) - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) - [max_ones_index](algorithms/arrays/max_ones_index.py) - [merge_intervals](algorithms/arrays/merge_intervals.py) From 23b35ff96d486e0d0fd3f9cc4364535bf7ba9d0b Mon Sep 17 00:00:00 2001 From: Lee Geon Date: Sun, 3 Jun 2018 16:05:55 +0900 Subject: [PATCH 313/387] Corrected link to Arrays/Josephus Problems (#300) * Update README_JP.md * Update README_CN.md * Update README_GE.md --- README_CN.md | 2 +- README_GE.md | 2 +- README_JP.md | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/README_CN.md b/README_CN.md index 166414b84..d6e3340ba 100644 --- a/README_CN.md +++ b/README_CN.md @@ -69,7 +69,7 @@ pip3 uninstall -y algorithms - [delete_nth: 删除第n项](algorithms/arrays/delete_nth.py) - [flatten：数组降维](algorithms/arrays/flatten.py) - [garage：停车场](algorithms/arrays/garage.py) - - [josephus_problem: 约瑟夫问题](algorithms/arrays/josephus_problem.py) + - [josephus_problem: 约瑟夫问题](algorithms/arrays/josephus.py) - [max_ones_index](algorithms/arrays/max_ones_index.py) - [longest_non_repeat：最长不重复子串](algorithms/arrays/longest_non_repeat.py/) - [merge_intervals：合并重叠间隔](algorithms/arrays/merge_intervals.py) diff --git a/README_GE.md b/README_GE.md index 02cfdb906..a25715537 100644 --- a/README_GE.md +++ b/README_GE.md @@ -63,7 +63,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [delete_nth](algorithms/arrays/delete_nth.py) - [flatten](algorithms/arrays/flatten.py) - [garage](algorithms/arrays/garage.py) - - [josephus_problem](algorithms/arrays/josephus_problem.py) + - [josephus_problem](algorithms/arrays/josephus.py) - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) - [max_ones_index](algorithms/arrays/max_ones_index.py) - [merge_intervals](algorithms/arrays/merge_intervals.py) diff --git a/README_JP.md b/README_JP.md index 4804b5fc5..d2e30aade 100644 --- a/README_JP.md +++ b/README_JP.md @@ -53,7 +53,7 @@ if __name__ == "__main__": - [delete_nth](algorithms/arrays/delete_nth.py) - [flatten](algorithms/arrays/flatten.py) - [garage](algorithms/arrays/garage.py) - - [josephus_problem](algorithms/arrays/josephus_problem.py) + - [josephus_problem](algorithms/arrays/josephus.py) - [max_ones_index](algorithms/arrays/max_ones_index.py) - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) - [merge_intervals](algorithms/arrays/merge_intervals.py) From 887a5bd1b9593219bcfcc06318e7b0ab561e91b9 Mon Sep 17 00:00:00 2001 From: hsi1032 Date: Sun, 3 Jun 2018 18:52:45 +0900 Subject: [PATCH 314/387] Create README_KR.md file that is korean translation of README.md (#297) * Create README_KR.md --- README_KR.md | 317 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 317 insertions(+) create mode 100644 README_KR.md diff --git a/README_KR.md b/README_KR.md new file mode 100644 index 000000000..a2b408a11 --- /dev/null +++ b/README_KR.md @@ -0,0 +1,317 @@ +English(README_EN.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 한국어 | [日本語](README_JP.md) + +Python 버전 자료구조 및 알고리즘 +========================================= + +Python 3로 구현한 간단하고 명확한 자료구조와 알고리즘들의 예제 입니다. + +## 기여 활동 +프로젝트 활동 참여에 관심을 가져주셔서 감사합니다! 여러가지 방법으로 이 프로젝트에 기여해주세요. [기여 방법 소개](CONTRIBUTING.md) + + +## 테스트 종류들 + +### 단위별 테스트 사용 +아래 명시된 모든 테스트 실행하기: + + $ python3 -m unittest discover tests + +특정 테스트 실행하기 위해선 아래 코드로 실행할 수 있습니다 (예시: sort): + + $ python3 -m unittest tests.test_sort + +### pytest 사용 +아래 명시된 모든 테스트 실행하기: + + $ python3 -m pytest tests + +## 알고리즘 설치 +만약 API 알고리즘들을 당신의 코드에 사용하기를 원한다면, 아래 코드로 간단하게 실행할 수 있습니다: + + $ pip3 install git+https://github.com/keon/algorithms + +그리고 python 파일을 만듦으로 테스트할 수 있습니다: (예시: 'sort'안에서 'merge_sort'사용) + +```python3 +from sort import merge_sort + +if __name__ == "__main__": + my_list = [1, 8, 3, 5, 6] + my_list = merge_sort.merge_sort(my_list) + print(my_list) +``` + +## 알고리즘 삭제 +만약 당신이 알고리즘들을 삭제하기 원한다면, 아래 코드로 간단하게 실행할 수 있습니다: + + $ pip3 uninstall -y algorithms + +## 구현 알고리즘 목록 + +- [arrays : 배열](algorithms/arrays) + - [delete_nth](algorithms/arrays/delete_nth.py) + - [flatten](algorithms/arrays/flatten.py) + - [garage](algorithms/arrays/garage.py) + - [josephus_problem](algorithms/arrays/josephus_problem.py) + - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) + - [merge_intervals](algorithms/arrays/merge_intervals.py) + - [missing_ranges](algorithms/arrays/missing_ranges.py) + - [plus_one](algorithms/arrays/plus_one.py) + - [rotate_array](algorithms/arrays/rotate_array.py) + - [summary_ranges](algorithms/arrays/summary_ranges.py) + - [three_sum](algorithms/arrays/three_sum.py) + - [two_sum](algorithms/arrays/two_sum.py) + - [move_zeros_to_end](algorithms/arrays/move_zeros_to_end.py) +- [backtrack : 백트래킹](algorithms/backtrack) + - [general_solution.md](algorithms/backtrack/) + - [anagram](algorithms/backtrack/anagram.py) + - [array_sum_combinations](algorithms/backtrack/array_sum_combinations.py) + - [combination_sum](algorithms/backtrack/combination_sum.py) + - [expression_add_operators](algorithms/backtrack/expression_add_operators.py) + - [factor_combinations](algorithms/backtrack/factor_combinations.py) + - [generate_abbreviations](algorithms/backtrack/generate_abbreviations.py) + - [generate_parenthesis](algorithms/backtrack/generate_parenthesis.py) + - [letter_combination](algorithms/backtrack/letter_combination.py) + - [palindrome_partitioning](algorithms/backtrack/palindrome_partitioning.py) + - [pattern_match](algorithms/backtrack/pattern_match.py) + - [permute](algorithms/backtrack/permute.py) + - [permute_unique](algorithms/backtrack/permute_unique.py) + - [subsets](algorithms/backtrack/subsets.py) + - [subsets_unique](algorithms/backtrack/subsets_unique.py) +- [bfs : 너비 우선 탐색](algorithms/bfs) + - [shortest_distance_from_all_buildings](algorithms/bfs/shortest_distance_from_all_buildings.py) + - [word_ladder](algorithms/bfs/word_ladder.py) +- [bit : 비트](algorithms/bit) + - [bytes_int_conversion](algorithms/bit/bytes_int_conversion.py) + - [count_ones](algorithms/bit/count_ones.py) + - [find_missing_number](algorithms/bit/find_missing_number.py) + - [power_of_two](algorithms/bit/power_of_two.py) + - [reverse_bits](algorithms/bit/reverse_bits.py) + - [single_number](algorithms/bit/single_number.py) + - [single_number2](algorithms/bit/single_number2.py) + - [single_number3](algorithms/bit/single_number3.py) + - [subsets](algorithms/bit/subsets.py) + - [add_bitwise_operator](algorithms/bit/add_bitwise_operator.py) + - [bit_operation](algorithms/bit/bit_operation.py) + - [swap_pair](algorithms/bit/swap_pair.py) + - [find_difference](algorithms/bit/find_difference.py) + - [has_alternative_bit](algorithms/bit/has_alternative_bit.py) + - [insert_bit](algorithms/bit/insert_bit.py) + - [remove_bit](algorithms/bit/remove_bit.py) +- [calculator : 계산기](algorithms/calculator) + - [math_parser](algorithms/calculator/math_parser.py) +- [dfs : 깊이 우선 탐색](algorithms/dfs) + - [all_factors](algorithms/dfs/all_factors.py) + - [count_islands](algorithms/dfs/count_islands.py) + - [pacific_atlantic](algorithms/dfs/pacific_atlantic.py) + - [sudoku_solver](algorithms/dfs/sudoku_solver.py) + - [walls_and_gates](algorithms/dfs/walls_and_gates.py) +- [dp : 동적 계획법](algorithms/dp) + - [buy_sell_stock](algorithms/dp/buy_sell_stock.py) + - [climbing_stairs](algorithms/dp/climbing_stairs.py) + - [coin_change](algorithms/dp/coin_change.py) + - [combination_sum](algorithms/dp/combination_sum.py) + - [egg_drop](algorithms/dp/egg_drop.py) + - [house_robber](algorithms/dp/house_robber.py) + - [job_scheduling](algorithms/dp/job_scheduling.py) + - [knapsack](algorithms/dp/knapsack.py) + - [longest_increasing](algorithms/dp/longest_increasing.py) + - [matrix_chain_order](algorithms/dp/matrix_chain_order.py) + - [max_product_subarray](algorithms/dp/max_product_subarray.py) + - [max_subarray](algorithms/dp/max_subarray.py) + - [min_cost_path](algorithms/dp/min_cost_path.py) + - [num_decodings](algorithms/dp/num_decodings.py) + - [regex_matching](algorithms/dp/regex_matching.py) + - [rod_cut](algorithms/dp/rod_cut.py) + - [word_break](algorithms/dp/word_break.py) + - [fibonacci](algorithms/dp/fib.py) +- [graph : 그래프](algorithms/graph) + - [strongly_connected](algorithms/graph/checkDiGraphStronglyConnected.py) + - [clone_graph](algorithms/graph/clone_graph.py) + - [cycle_detection](algorithms/graph/cycle_detection.py) + - [find_all_cliques](algorithms/graph/find_all_cliques.py) + - [find_path](algorithms/graph/find_path.py) + - [graph](algorithms/graph/graph.py) + - [markov_chain](algorithms/graph/markov_chain.py) + - [minimum_spanning_tree](algorithms/graph/minimum_spanning_tree.py) + - [satisfiability](algorithms/graph/satisfiability.py) + - [tarjan](algorithms/graph/tarjan.py) + - [traversal](algorithms/graph/traversal.py) +- [heap : 힙](algorithms/heap) + - [merge_sorted_k_lists](algorithms/heap/merge_sorted_k_lists.py) + - [skyline](algorithms/heap/skyline.py) + - [sliding_window_max](algorithms/heap/sliding_window_max.py) + - [binary_heap](algorithms/heap/binary_heap.py) +- [linkedlist : 연결 리스트](algorithms/linkedlist) + - [add_two_numbers](algorithms/linkedlist/add_two_numbers.py) + - [copy_random_pointer](algorithms/linkedlist/copy_random_pointer.py) + - [delete_node](algorithms/linkedlist/delete_node.py) + - [first_cyclic_node](algorithms/linkedlist/first_cyclic_node.py) + - [is_cyclic](algorithms/linkedlist/is_cyclic.py) + - [is_palindrome](algorithms/linkedlist/is_palindrome.py) + - [kth_to_last](algorithms/linkedlist/kth_to_last.py) + - [linkedlist](algorithms/linkedlist/linkedlist.py) + - [remove_duplicates](algorithms/linkedlist/remove_duplicates.py) + - [reverse](algorithms/linkedlist/reverse.py) + - [rotate_list](algorithms/linkedlist/rotate_list.py) + - [swap_in_pairs](algorithms/linkedlist/swap_in_pairs.py) + - [is_sorted](algorithms/linkedlist/is_sorted.py) + - [remove_range](algorithms/linkedlist/remove_range.py) +- [map : 맵](algorithms/map) + - [hashtable](algorithms/map/hashtable.py) + - [separate_chaining_hashtable](algorithms/map/separate_chaining_hashtable.py) + - [longest_common_subsequence](algorithms/map/longest_common_subsequence.py) + - [randomized_set](algorithms/map/randomized_set.py) + - [valid_sudoku](algorithms/map/valid_sudoku.py) +- [maths : 수학 계산](algorithms/maths) + - [base_conversion](algorithms/maths/base_conversion.py) + - [extended_gcd](algorithms/maths/extended_gcd.py) + - [gcd/lcm](algorithms/maths/gcd.py) + - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) + - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py) + - [next_bigger](algorithms/maths/next_bigger.py) + - [next_perfect_square](algorithms/maths/next_perfect_square.py) + - [nth_digit](algorithms/maths/nth_digit.py) + - [prime_check](algorithms/maths/prime_check.py) + - [primes_sieve_of_eratosthenes](algorithms/maths/primes_sieve_of_eratosthenes.py) + - [pythagoras](algorithms/maths/pythagoras.py) + - [rabin_miller](algorithms/maths/rabin_miller.py) + - [rsa](algorithms/maths/rsa.py) + - [sqrt_precision_factor](algorithms/maths/sqrt_precision_factor.py) + - [summing_digits](algorithms/maths/summing_digits.py) +- [matrix : 행렬](algorithms/matrix) + - [sudoku_validator](algorithms/matrix/sudoku_validator.py) + - [bomb_enemy](algorithms/matrix/bomb_enemy.py) + - [copy_transform](algorithms/matrix/copy_transform.py) + - [count_paths](algorithms/matrix/count_paths.py) + - [matrix_rotation.txt](algorithms/matrix/matrix_rotation.txt) + - [rotate_image](algorithms/matrix/rotate_image.py) + - [search_in_sorted_matrix](algorithms/matrix/search_in_sorted_matrix.py) + - [sparse_dot_vector](algorithms/matrix/sparse_dot_vector.py) + - [sparse_mul](algorithms/matrix/sparse_mul.py) + - [spiral_traversal](algorithms/matrix/spiral_traversal.py) +- [queues : 큐](algorithms/queues) + - [max_sliding_window](algorithms/queues/max_sliding_window.py) + - [moving_average](algorithms/queues/moving_average.py) + - [queue](algorithms/queues/queue.py) + - [reconstruct_queue](algorithms/queues/reconstruct_queue.py) + - [zigzagiterator](algorithms/queues/zigzagiterator.py) +- [search : 탐색 알고리즘](algorithms/search) + - [binary_search](algorithms/search/binary_search.py) + - [first_occurance](algorithms/search/first_occurance.py) + - [last_occurance](algorithms/search/last_occurance.py) + - [search_insert](algorithms/search/search_insert.py) + - [two_sum](algorithms/search/two_sum.py) + - [search_range](algorithms/search/search_range.py) + - [find_min_rotate](algorithms/search/find_min_rotate.py) + - [search_rotate](algorithms/search/search_rotate.py) +- [set : 집합](algorithms/set) + - [randomized_set](algorithms/set/randomized_set.py) + - [set_covering](algorithms/set/set_covering.py) +- [sort : 정렬 알고리즘](algorithms/sort) + - [bubble_sort](algorithms/sort/bubble_sort.py) + - [comb_sort](algorithms/sort/comb_sort.py) + - [counting_sort](algorithms/sort/counting_sort.py) + - [heap_sort](algorithms/sort/heap_sort.py) + - [insertion_sort](algorithms/sort/insertion_sort.py) + - [meeting_rooms](algorithms/sort/meeting_rooms.py) + - [merge_sort](algorithms/sort/merge_sort.py) + - [quick_sort](algorithms/sort/quick_sort.py) + - [selection_sort](algorithms/sort/selection_sort.py) + - [sort_colors](algorithms/sort/sort_colors.py) + - [topsort](algorithms/sort/topsort.py) + - [wiggle_sort](algorithms/sort/wiggle_sort.py) +- [stack : 스택](algorithms/stack) + - [longest_abs_path](algorithms/stack/longest_abs_path.py) + - [simplify_path](algorithms/stack/simplify_path.py) + - [stack](algorithms/stack/stack.py) + - [valid_parenthesis](algorithms/stack/valid_parenthesis.py) + - [stutter](algorithms/stack/stutter.py) + - [switch_pairs](algorithms/stack/switch_pairs.py) + - [is_consecutive](algorithms/stack/is_consecutive.py) + - [remove_min](algorithms/stack/remove_min.py) + - [is_sorted](algorithms/stack/is_sorted.py) +- [strings : 문자열](algorithms/strings) + - [fizzbuzz](algorithms/strings/fizzbuzz.py) + - [delete_reoccurring_characters](algorithms/strings/delete_reoccurring_characters.py) + - [strip_url_params](algorithms/strings/strip_url_params.py) + - [validate_coordinates](algorithms/strings/validate_coordinates.py) + - [domain_extractor](algorithms/strings/domain_extractor.py) + - [merge_string_checker](algorithms/strings/merge_string_checker.py) + - [add_binary](algorithms/strings/add_binary.py) + - [breaking_bad](algorithms/strings/breaking_bad.py) + - [decode_string](algorithms/strings/decode_string.py) + - [encode_decode](algorithms/strings/encode_decode.py) + - [group_anagrams](algorithms/strings/group_anagrams.py) + - [int_to_roman](algorithms/strings/int_to_roman.py) + - [is_palindrome](algorithms/strings/is_palindrome.py) + - [license_number](algorithms/strings/license_number.py) + - [make_sentence](algorithms/strings/make_sentence.py) + - [multiply_strings](algorithms/strings/multiply_strings.py) + - [one_edit_distance](algorithms/strings/one_edit_distance.py) + - [rabin_karp](algorithms/strings/rabin_karp.py) + - [reverse_string](algorithms/strings/reverse_string.py) + - [reverse_vowel](algorithms/strings/reverse_vowel.py) + - [reverse_words](algorithms/strings/reverse_words.py) + - [roman_to_int](algorithms/strings/roman_to_int.py) + - [word_squares](algorithms/strings/word_squares.py) +- [tree : 트리](algorithms/tree) + - [bst : 이진 탐색 트리](algorithms/tree/tree/bst) + - [array2bst](algorithms/tree/bst/array2bst.py) + - [bst_closest_value](algorithms/tree/bst/bst_closest_value.py) + - [BSTIterator](algorithms/tree/bst/BSTIterator.py) + - [delete_node](algorithms/tree/bst/delete_node.py) + - [is_bst](algorithms/tree/bst/is_bst.py) + - [kth_smallest](algorithms/tree/bst/kth_smallest.py) + - [lowest_common_ancestor](algorithms/tree/bst/lowest_common_ancestor.py) + - [predecessor](algorithms/tree/bst/predecessor.py) + - [serialize_deserialize](algorithms/tree/bst/serialize_deserialize.py) + - [successor](algorithms/tree/bst/successor.py) + - [unique_bst](algorithms/tree/bst/unique_bst.py) + - [depth_sum](algorithms/tree/bst/depth_sum.py) + - [count_left_node](algorithms/tree/bst/count_left_node.py) + - [num_empty](algorithms/tree/bst/num_empty.py) + - [height](algorithms/tree/bst/height.py) + - [red_black_tree : 레드 블랙 트리](algorithms/tree/red_black_tree) + - [red_black_tree](algorithms/tree/red_black_tree/red_black_tree.py) + - [segment_tree : 세그먼트 트리](algorithms/tree/segment_tree) + - [segment_tree](algorithms/tree/segment_tree/segment_tree.py) + - [traversal : 트리 순회](algorithms/tree/traversal) + - [inorder](algorithms/tree/traversal/inorder.py) + - [level_order](algorithms/tree/traversal/level_order.py) + - [zigzag](algorithms/tree/traversal/zigzag.py) + - [trie : 트라이](algorithms/tree/trie) + - [add_and_search](algorithms/tree/trie/add_and_search.py) + - [trie](algorithms/tree/trie/trie.py) + - [binary_tree_paths](algorithms/tree/binary_tree_paths.py) + - [bintree2list](algorithms/tree/bintree2list.py) + - [deepest_left](algorithms/tree/deepest_left.py) + - [invert_tree](algorithms/tree/invert_tree.py) + - [is_balanced](algorithms/tree/is_balanced.py) + - [is_subtree](algorithms/tree/is_subtree.py) + - [is_symmetric](algorithms/tree/is_symmetric.py) + - [longest_consecutive](algorithms/tree/longest_consecutive.py) + - [lowest_common_ancestor](algorithms/tree/lowest_common_ancestor.py) + - [max_height](algorithms/tree/max_height.py) + - [max_path_sum](algorithms/tree/max_path_sum.py) + - [min_height](algorithms/tree/min_height.py) + - [path_sum](algorithms/tree/path_sum.py) + - [path_sum2](algorithms/tree/path_sum2.py) + - [pretty_print](algorithms/tree/pretty_print.py) + - [same_tree](algorithms/tree/same_tree.py) + - [tree](algorithms/tree/tree.py) +- [union-find : 합집합 찾기](algorithms/union-find) + - [count_islands](algorithms/union-find/count_islands.py) + +## 기여자들 +이 저장소는 아래 사람들에 의해 유지되고 있습니다. + +* [Keon Kim](https://github.com/keon) +* [Rahul Goswami](https://github.com/goswami-rahul) +* [Christian Bender](https://github.com/christianbender) +* [Ankit Agarwal](https://github.com/ankit167) +* [Hai Hoang Dang](https://github.com/danghai) +* [Saad](https://github.com/SaadBenn) + +그리고 이 저장소를 만드는데 도움을 준 [모든 기여자](https://github.com/keon/algorithms/graphs/contributors) +분 들에게 감사를 표합니다. From e414353a85a64cdc6f01a6ed601c41bf4bfd790e Mon Sep 17 00:00:00 2001 From: Han SangWook <9967han@naver.com> Date: Mon, 4 Jun 2018 01:38:12 +0900 Subject: [PATCH 315/387] Added link to Korean README file in other README files (#302) * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md --- README.md | 2 +- README_CN.md | 2 +- README_GE.md | 2 +- README_JP.md | 2 +- 4 files changed, 4 insertions(+), 4 deletions(-) diff --git a/README.md b/README.md index 6006ba14a..231facdad 100644 --- a/README.md +++ b/README.md @@ -1,4 +1,4 @@ -English | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) +English | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) [![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) diff --git a/README_CN.md b/README_CN.md index d6e3340ba..130898a66 100644 --- a/README_CN.md +++ b/README_CN.md @@ -1,4 +1,4 @@ -[English](README.md) | 简体中文 | [Deutsch](README_GE.md) | [日本語](README_JP.md) +[English](README.md) | 简体中文 | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) Python版数据结构和算法 ========================================= diff --git a/README_GE.md b/README_GE.md index a25715537..5380e65a9 100644 --- a/README_GE.md +++ b/README_GE.md @@ -1,4 +1,4 @@ -[English](README.md) | [简体中文](README_CN.md) | Deutsch | [日本語](README_JP.md) +[English](README.md) | [简体中文](README_CN.md) | Deutsch | [日本語](README_JP.md) | [한국어](README_KR.md) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) [![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) diff --git a/README_JP.md b/README_JP.md index d2e30aade..f50d6df18 100644 --- a/README_JP.md +++ b/README_JP.md @@ -1,4 +1,4 @@ -[English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 日本語 +[English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 日本語 | [한국어](README_KR.md) pythonのデータ構造とアルゴリズム ========================================= From bb9d6c195665abbcd2e52d2e712d8632142b7fa7 Mon Sep 17 00:00:00 2001 From: Lee Geon Date: Mon, 4 Jun 2018 20:37:07 +0900 Subject: [PATCH 316/387] Created combination.py in maths (#304) * Create combination.py * Update __init__.py * Update test_maths.py * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md --- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 3 ++- README_KR.md | 1 + algorithms/maths/__init__.py | 1 + algorithms/maths/combination.py | 6 ++++++ tests/test_maths.py | 14 +++++++++++++- 8 files changed, 26 insertions(+), 2 deletions(-) create mode 100644 algorithms/maths/combination.py diff --git a/README.md b/README.md index 231facdad..3814933ba 100644 --- a/README.md +++ b/README.md @@ -172,6 +172,7 @@ If you want to uninstall algorithms, it is as simple as: - [valid_sudoku](algorithms/map/valid_sudoku.py) - [maths](algorithms/maths) - [base_conversion](algorithms/maths/base_conversion.py) + - [combination](algorithms/maths/combination.py) - [extended_gcd](algorithms/maths/extended_gcd.py) - [gcd/lcm](algorithms/maths/gcd.py) - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) diff --git a/README_CN.md b/README_CN.md index 130898a66..5427972c8 100644 --- a/README_CN.md +++ b/README_CN.md @@ -164,6 +164,7 @@ pip3 uninstall -y algorithms - [valid_sudoku：有效数独](algorithms/map/valid_sudoku.py) - [math：数学问题](algorithms/maths) - [extended_gcd：扩展欧几里得算法](algorithms/maths/extended_gcd.py) + - [combination](algorithms/maths/combination.py) - [gcd/lcm：最大公约数和最小公倍数](algorithms/maths/gcd.py) - [prime_test：主要测试](algorithms/maths/prime_test.py) - [primes_sieve_of_eratosthenes：埃拉托色尼的质数筛](algorithms/maths/primes_sieve_of_eratosthenes.py) diff --git a/README_GE.md b/README_GE.md index 5380e65a9..bd9c46995 100644 --- a/README_GE.md +++ b/README_GE.md @@ -179,6 +179,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [valid_sudoku](algorithms/map/valid_sudoku.py) - [maths](algorithms/maths) - [base_conversion](algorithms/maths/base_conversion.py) + - [combination](algorithms/maths/combination.py) - [extended_gcd](algorithms/maths/extended_gcd.py) - [gcd/lcm](algorithms/maths/gcd.py) - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) diff --git a/README_JP.md b/README_JP.md index f50d6df18..393e0bb44 100644 --- a/README_JP.md +++ b/README_JP.md @@ -1,6 +1,6 @@ [English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 日本語 | [한국어](README_KR.md) -pythonのデータ構造とアルゴリズム +Pythonのデータ構造とアルゴリズム ========================================= Python 3で開発された簡単で明確なデータ構造とアルゴリズムの例を紹介します。 @@ -169,6 +169,7 @@ if __name__ == "__main__": - [valid_sudoku](algorithms/map/valid_sudoku.py) - [maths : 数学](algorithms/maths) - [base_conversion](algorithms/maths/base_conversion.py) + - [combination](algorithms/maths/combination.py) - [extended_gcd](algorithms/maths/extended_gcd.py) - [gcd/lcm](algorithms/maths/gcd.py) - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) diff --git a/README_KR.md b/README_KR.md index a2b408a11..dd1bfb852 100644 --- a/README_KR.md +++ b/README_KR.md @@ -165,6 +165,7 @@ if __name__ == "__main__": - [valid_sudoku](algorithms/map/valid_sudoku.py) - [maths : 수학 계산](algorithms/maths) - [base_conversion](algorithms/maths/base_conversion.py) + - [combination](algorithms/maths/combination.py) - [extended_gcd](algorithms/maths/extended_gcd.py) - [gcd/lcm](algorithms/maths/gcd.py) - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) diff --git a/algorithms/maths/__init__.py b/algorithms/maths/__init__.py index 6716384ba..d791ad864 100644 --- a/algorithms/maths/__init__.py +++ b/algorithms/maths/__init__.py @@ -9,3 +9,4 @@ from .pythagoras import * from .rabin_miller import * from .rsa import * +from .combination import * diff --git a/algorithms/maths/combination.py b/algorithms/maths/combination.py new file mode 100644 index 000000000..ea9e4b37f --- /dev/null +++ b/algorithms/maths/combination.py @@ -0,0 +1,6 @@ +def combination(n, r): + # This function calculates nCr + if n == r or r == 0: + return 1 + else: + return combination(n-1, r-1) + combination(n-1, r) diff --git a/tests/test_maths.py b/tests/test_maths.py index afafd2ec5..fbf0772aa 100644 --- a/tests/test_maths.py +++ b/tests/test_maths.py @@ -9,7 +9,8 @@ primes, pythagoras, is_prime, - encrypt, decrypt, generate_key + encrypt, decrypt, generate_key, + combination ) import unittest @@ -202,6 +203,17 @@ def test_encrypt_decrypt(self): # dec = decrypt(en, d, n) # self.assertEqual(data,dec) +class TestCombination(unittest.TestCase): + """[summary] + Test for the file rsa.py + + Arguments: + unittest {[type]} -- [description] + """ + def test_combination(self): + self.assertEqual(10, combination(5, 2)) + self.assertEqual(252, combination(10, 5)) + if __name__ == "__main__": unittest.main() From 4a3cbb70bb254f8089c3a596ee220ff3f97f714f Mon Sep 17 00:00:00 2001 From: aig031 <31883686+aig031@users.noreply.github.com> Date: Mon, 4 Jun 2018 21:42:09 +0900 Subject: [PATCH 317/387] Created radix_sort.py in algorithms/sort (#303) * Create radix_sort.py * Update test_sort.py * Update __init__.py * Update radix_sort.py * Update radix_sort.py * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md --- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 1 + algorithms/sort/__init__.py | 1 + algorithms/sort/radix_sort.py | 26 ++++++++++++++++++++++++++ tests/test_sort.py | 7 ++++++- 8 files changed, 38 insertions(+), 1 deletion(-) create mode 100644 algorithms/sort/radix_sort.py diff --git a/README.md b/README.md index 3814933ba..c6011f84c 100644 --- a/README.md +++ b/README.md @@ -226,6 +226,7 @@ If you want to uninstall algorithms, it is as simple as: - [meeting_rooms](algorithms/sort/meeting_rooms.py) - [merge_sort](algorithms/sort/merge_sort.py) - [quick_sort](algorithms/sort/quick_sort.py) + - [radix_sort](algorithms/sort/radix_sort.py) - [selection_sort](algorithms/sort/selection_sort.py) - [shell_sort](algorithms/sort/shell_sort.py) - [sort_colors](algorithms/sort/sort_colors.py) diff --git a/README_CN.md b/README_CN.md index 5427972c8..91451ff89 100644 --- a/README_CN.md +++ b/README_CN.md @@ -208,6 +208,7 @@ pip3 uninstall -y algorithms - [meeting_rooms：会议室](algorithms/sort/meeting_rooms.py) - [merge_sort：归并排序](algorithms/sort/merge_sort.py) - [quick_sort：快速排序](algorithms/sort/quick_sort.py) + - [radix_sort](algorithms/sort/radix_sort.py) - [selection_sort：选择排序](algorithms/sort/selection_sort.py) - [shell_sort](algorithms/sort/shell_sort.py) - [sort_colors：颜色排序](algorithms/sort/sort_colors.py) diff --git a/README_GE.md b/README_GE.md index bd9c46995..89922c555 100644 --- a/README_GE.md +++ b/README_GE.md @@ -233,6 +233,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [meeting_rooms](algorithms/sort/meeting_rooms.py) - [merge_sort](algorithms/sort/merge_sort.py) - [quick_sort](algorithms/sort/quick_sort.py) + - [radix_sort](algorithms/sort/radix_sort.py) - [selection_sort](algorithms/sort/selection_sort.py) - [shell_sort](algorithms/sort/shell_sort.py) - [sort_colors](algorithms/sort/sort_colors.py) diff --git a/README_JP.md b/README_JP.md index 393e0bb44..3083d72d3 100644 --- a/README_JP.md +++ b/README_JP.md @@ -223,6 +223,7 @@ if __name__ == "__main__": - [meeting_rooms](algorithms/sort/meeting_rooms.py) - [merge_sort](algorithms/sort/merge_sort.py) - [quick_sort](algorithms/sort/quick_sort.py) + - [radix_sort](algorithms/sort/radix_sort.py) - [selection_sort](algorithms/sort/selection_sort.py) - [shell_sort](algorithms/sort/shell_sort.py) - [sort_colors](algorithms/sort/sort_colors.py) diff --git a/README_KR.md b/README_KR.md index dd1bfb852..0b4c59982 100644 --- a/README_KR.md +++ b/README_KR.md @@ -218,6 +218,7 @@ if __name__ == "__main__": - [meeting_rooms](algorithms/sort/meeting_rooms.py) - [merge_sort](algorithms/sort/merge_sort.py) - [quick_sort](algorithms/sort/quick_sort.py) + - [radix_sort](algorithms/sort/radix_sort.py) - [selection_sort](algorithms/sort/selection_sort.py) - [sort_colors](algorithms/sort/sort_colors.py) - [topsort](algorithms/sort/topsort.py) diff --git a/algorithms/sort/__init__.py b/algorithms/sort/__init__.py index 665a0d70d..39eb1478b 100644 --- a/algorithms/sort/__init__.py +++ b/algorithms/sort/__init__.py @@ -8,3 +8,4 @@ from .selection_sort import * from .bucket_sort import * from .shell_sort import * +from .radix_sort import * diff --git a/algorithms/sort/radix_sort.py b/algorithms/sort/radix_sort.py new file mode 100644 index 000000000..fee0f2f7f --- /dev/null +++ b/algorithms/sort/radix_sort.py @@ -0,0 +1,26 @@ +""" +radix sort +complexity: O(nk) . n is the size of input list and k is the digit length of the number +""" +def radix_sort(arr): + is_done = False + position = 1 + + while not is_done: + queue_list = [list() for _ in range(10)] + is_done = True + + for num in arr: + digit_number = num // position % 10 + queue_list[digit_number].append(num) + if is_done and digit_number > 0: + is_done = False + + index = 0 + for numbers in queue_list: + for num in numbers: + arr[index] = num + index += 1 + + position *= 10 + return arr diff --git a/tests/test_sort.py b/tests/test_sort.py index 43d5bf29e..4665259ab 100644 --- a/tests/test_sort.py +++ b/tests/test_sort.py @@ -8,7 +8,8 @@ quick_sort, selection_sort, bucket_sort, - shell_sort + shell_sort, + radix_sort ) import unittest @@ -59,6 +60,10 @@ def test_shell_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], shell_sort([1, 5, 65, 23, 57, 1232])) + def test_radix_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + radix_sort([1, 5, 65, 23, 57, 1232])) + if __name__ == "__main__": From 97e5e85cedd11ce8353a4f68edc5dcd943e061fb Mon Sep 17 00:00:00 2001 From: Roger Li Date: Tue, 5 Jun 2018 00:07:56 -0400 Subject: [PATCH 318/387] Zhengli0817 patch 1 - update topsort.py (#295) * Update bst.py * Update topsort.py The original algo is wrong because it is using BFS, it should use DFS instead. A counter-example is provided below: depGraph = { "a" : [ "b" ], "b" : [ "c" ], "c" : [ 'e'], 'e' : [ 'g' ], "d" : [ ], "f" : ["e" , "d"], "g" : [ ] } given = [ "b", "c", "a", "d", "e", "f", "g" ] The output of ret_dep_graph() is: ['e', 'g', 'c', 'b', 'a', 'd', 'f'] Clearly, 'g' has to be done before 'e'. * Update topsort.py * Update topsort.py The original algo in topsort.py is wrong because it is using BFS, it should use DFS instead. A counter-example is provided below: depGraph = { "a" : [ "b" ], "b" : [ "c" ], "c" : [ 'e'], 'e' : [ 'g' ], "d" : [ ], "f" : ["e" , "d"], "g" : [ ] } given = [ "b", "c", "a", "d", "e", "f", "g" ] The output of ret_dep_graph() is: ['e', 'g', 'c', 'b', 'a', 'd', 'f'] Clearly, 'g' has to be done before 'e'. * Update topsort.py * Create __init__.py * Update __init__.py * Update __init__.py * Create test_topsort.py * Update topsort.py * Update test_topsort.py * Update __init__.py * Update and rename topsort.py to top_sort.py * Update top_sort.py * Update __init__.py * Update test_topsort.py --- algorithms/sort/__init__.py | 1 + algorithms/sort/top_sort.py | 66 +++++++++++++++++++++++++++++++++++++ algorithms/sort/topsort.py | 60 --------------------------------- tests/graph/__init__.py | 1 + tests/graph/test_topsort.py | 27 +++++++++++++++ 5 files changed, 95 insertions(+), 60 deletions(-) create mode 100644 algorithms/sort/top_sort.py delete mode 100644 algorithms/sort/topsort.py create mode 100644 tests/graph/__init__.py create mode 100644 tests/graph/test_topsort.py diff --git a/algorithms/sort/__init__.py b/algorithms/sort/__init__.py index 39eb1478b..d86e2bce3 100644 --- a/algorithms/sort/__init__.py +++ b/algorithms/sort/__init__.py @@ -6,6 +6,7 @@ from .merge_sort import * from .quick_sort import * from .selection_sort import * +from .top_sort import * from .bucket_sort import * from .shell_sort import * from .radix_sort import * diff --git a/algorithms/sort/top_sort.py b/algorithms/sort/top_sort.py new file mode 100644 index 000000000..b9188bb28 --- /dev/null +++ b/algorithms/sort/top_sort.py @@ -0,0 +1,66 @@ +GRAY, BLACK = 0, 1 + +def top_sort_recursive(graph): + """ Time complexity is the same as DFS, which is O(V + E) + Space complexity: O(V) + """ + order, enter, state = [], set(graph), {} + + def dfs(node): + state[node] = GRAY + #print(node) + for k in graph.get(node, ()): + sk = state.get(k, None) + if sk == GRAY: + raise ValueError("cycle") + if sk == BLACK: + continue + enter.discard(k) + dfs(k) + order.append(node) + state[node] = BLACK + + while enter: dfs(enter.pop()) + return order + +def top_sort(graph): + """ Time complexity is the same as DFS, which is O(V + E) + Space complexity: O(V) + """ + order, enter, state = [], set(graph), {} + + def is_ready(node): + lst = graph.get(node, ()) + if len(lst) == 0: + return True + for k in lst: + sk = state.get(k, None) + if sk == GRAY: + raise ValueError("cycle") + if sk != BLACK: + return False + return True + + while enter: + node = enter.pop() + stack = [] + while True: + state[node] = GRAY + stack.append(node) + for k in graph.get(node, ()): + sk = state.get(k, None) + if sk == GRAY: + raise ValueError("cycle") + if sk == BLACK: + continue + enter.discard(k) + stack.append(k) + while stack and is_ready(stack[-1]): + node = stack.pop() + order.append(node) + state[node] = BLACK + if len(stack) == 0: + break + node = stack.pop() + + return order diff --git a/algorithms/sort/topsort.py b/algorithms/sort/topsort.py deleted file mode 100644 index 8341ce941..000000000 --- a/algorithms/sort/topsort.py +++ /dev/null @@ -1,60 +0,0 @@ -""" -Given a list of system packages, -some packages cannot be installed until the other packages are installed. -Provide a valid sequence to install all of the packages. - -e.g. -a relies on b -b relies on c - -then a valid sequence is [c, b, a] -""" - -depGraph = { - - "a": ["b"], - "b": ["c"], - "c": ['e'], - 'e': [], - "d": [], - "f": ["e", "d"] -} - -given = ["b", "c", "a", "d", "e", "f"] - - -def ret_deps(visited, start): - queue = [] - out = [] - queue.append(start) - while queue: - new_node = queue.pop(0) - if new_node not in visited: - visited.add(new_node) - for child in depGraph[new_node]: - queue.append(child) - out.append(child) - out.append(start) - return out - - -def ret_dep_graph(): - visited = set() - out = [] - # visited.add(given[0]) - for pac in given: - if pac in visited: - continue - visited.add(pac) - # out.append(pac) - if pac in depGraph: - # find all children - for child in depGraph[pac]: - if child in visited: - continue - out.extend(ret_deps(visited, child)) - out.append(pac) - print(out) - - -ret_dep_graph() diff --git a/tests/graph/__init__.py b/tests/graph/__init__.py new file mode 100644 index 000000000..8b1378917 --- /dev/null +++ b/tests/graph/__init__.py @@ -0,0 +1 @@ + diff --git a/tests/graph/test_topsort.py b/tests/graph/test_topsort.py new file mode 100644 index 000000000..a308ed306 --- /dev/null +++ b/tests/graph/test_topsort.py @@ -0,0 +1,27 @@ +from algorithms.sort import ( + top_sort, top_sort_recursive +) + +import unittest + +class TestSuite(unittest.TestCase): + def setUp(self): + self.depGraph = { + "a" : [ "b" ], + "b" : [ "c" ], + "c" : [ 'e'], + 'e' : [ 'g' ], + "d" : [ ], + "f" : ["e" , "d"], + "g" : [ ] + } + + def test_topsort(self): + res = top_sort_recursive(self.depGraph) + #print(res) + self.assertTrue(res.index('g') < res.index('e')) + res = top_sort(self.depGraph) + self.assertTrue(res.index('g') < res.index('e')) + +if __name__ == '__main__': + unittest.main() From 8f68ac88333400930c3417d37ff30e9dc72b8b7c Mon Sep 17 00:00:00 2001 From: aig031 <31883686+aig031@users.noreply.github.com> Date: Tue, 5 Jun 2018 13:10:32 +0900 Subject: [PATCH 319/387] Created CONTRIBUTING_KR.md in Korean (#290) * Update CONTRIBUTING_KR.md --- CONTRIBUTING_KR.md | 66 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 CONTRIBUTING_KR.md diff --git a/CONTRIBUTING_KR.md b/CONTRIBUTING_KR.md new file mode 100644 index 000000000..522f0e5b9 --- /dev/null +++ b/CONTRIBUTING_KR.md @@ -0,0 +1,66 @@ +# 기여 활동 + +모든 pull request는 환영입니다. 이 저장소에 기여 함으로써, 당신은 [code of conduct](CODE_OF_CONDUCT.md) +를 준수하는 것에 동의 한 것입니다. + + +## 시작하기 + +* 우선 이 저장소를 [fork][fork] 하시고, 이를 사용하기 위해서 다음과 같이 clone 주세요: + + git clone git@github.com:your-username/algorithms.git + +* 그리고 새로운 내용을 더할 branch를 만들어주세요. 예를 들어: + * add_XXX 만약 당신이 새로운 알고리즘이나 자료 구조를 추가 했을 경우. + * fix_XXX 만약 당신이 어떤 알고리즘이나 자료 구조에서 고쳐야할 bug를 발견했을 경우. + * test_XXX 만약 당신이 test/s를 작성한 경우. + +당신은 다음과 같이 기여할 수 있습니다: +- 새로운 알고리즘을 구현해주세요. 그리고, 그것을 정확히 분류해주세요(e.g. [array](array), [dp](dp), etc). +만약 당신의 알고리즘이 어떤 섹션에도 포함이 되지 않는다면, 새로운 섹션을 만들어 주세요. 단, 당신의 알고리즘이 제대로 작동하는지 +확인해주세요. +- 알고리즘들을 최적화하거나 향상시켜주세요. +- 문제들에 대해서 다른 해결 법을 추가해주세요. +- 버그들을 찾거나 고쳐주세요. +- 알고리즘들을 더 잘 설명하기 위한 새로운 예시들을 추가해주세요. +- test cases를 추가해주세요. + +## Pull Requests +당신의 fork에 push 하고 pull request를 제출하세요 [submit a pull request][pr]. + +우리는 이를 검토할 것이며, 변화, 개량, 혹은 대안을 제시할 수 도 있습니다. +여기에 당신의 pull request가 허용될 가능성을 높여주는 몇몇 요소들이 있습니다: + +* 모든 알고리즘들은 **Python 3**로 작성되어야 합니다. +(몇몇 알고리즘들은 여전히 _python 2_ 로 작성되어져 있습니다. 당신은 이를 Python 3으로 번역함으로써 저희에게 기여 해주실 수도 있습니다. +[those][issue120] to _Python 3_.) +* 깔끔하고 이해할 수 있는 코드를 작성해주세요. +* 코드에 대해 올바르게 주석 처리 해 주시고, 알고리즘이 수행하는 작업에 대해서 [docstrings][docstr]에서 설명해 주세요. +* 당신은 간단한 예시를 제시함으로써 출력 값에 대하여 설명하실 수도 있습니다. +* 또한 가능하다면 알고리즘에 대하여, 두 가지의 test cases를 포함 시켜주세요. +* [good commit message][commit]를 작성해주세요. + + +## Issues +만약 추가해야 할 알고리즘이 있거나, 현재 저희 프로젝트의 어떤 알고리즘에서 버그가 발견된다면 [new issue][newissue]에 이를 추가해주세요. 새로운 issue를 제안하기 전에 중복된 issue을 발생을 피하기 위해서 [existing issues][issues]를 확인해주세요. 또한, 현재 존재하는 issue를 해결하는 것을 고려해주시거나 issue에 대한 토의에 기여해주세요. + +## Collaborators +저희 협업자 들에게 어떤 도움이나 확인이 필요하다면, 위 주소로 물어봐주세요. + +[Keon Kim](https://github.com/keon) + +[Rahul Goswami](https://github.com/goswami-rahul) + +[Ankit Agarwal](https://github.com/ankit167) + +[Hai Hoang Dang](https://github.com/danghai) + +[Saad](https://github.com/SaadBenn) + +[fork]: https://help.github.com/articles/fork-a-repo/ +[docstr]: https://www.python.org/dev/peps/pep-0257/#multi-line-docstrings +[commit]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html +[pr]: https://github.com/keon/algorithms/compare/ +[newissue]: https://github.com/keon/algorithms/issues/new +[issue120]: https://github.com/keon/algorithms/issues/120 +[issues]: https://github.com/keon/algorithms/issues/ From dec867e8329d7bac74424039a693633d6e119b16 Mon Sep 17 00:00:00 2001 From: ppuzzle Date: Tue, 5 Jun 2018 19:04:10 +0900 Subject: [PATCH 320/387] Create linear_search.py in algorithms/search (#305) * Create linear_search.py * Update linear_search.py * Update linear_search.py * Update README.md * Update README.md * Update test_search.py * Update __init__.py --- README.md | 1 + algorithms/search/__init__.py | 1 + algorithms/search/linear_search.py | 13 +++++++++++++ tests/test_search.py | 8 ++++++++ 4 files changed, 23 insertions(+) create mode 100644 algorithms/search/linear_search.py diff --git a/README.md b/README.md index c6011f84c..aff2cd5af 100644 --- a/README.md +++ b/README.md @@ -208,6 +208,7 @@ If you want to uninstall algorithms, it is as simple as: - [binary_search](algorithms/search/binary_search.py) - [first_occurance](algorithms/search/first_occurance.py) - [last_occurance](algorithms/search/last_occurance.py) + - [linear_search](algorithms/search/linear_search.py) - [search_insert](algorithms/search/search_insert.py) - [two_sum](algorithms/search/two_sum.py) - [search_range](algorithms/search/search_range.py) diff --git a/algorithms/search/__init__.py b/algorithms/search/__init__.py index cebea34fd..89bea2dc8 100644 --- a/algorithms/search/__init__.py +++ b/algorithms/search/__init__.py @@ -1,6 +1,7 @@ from .binary_search import * from .first_occurance import * from .last_occurance import * +from .linear_search import * from .search_insert import * from .two_sum import * from .search_range import * diff --git a/algorithms/search/linear_search.py b/algorithms/search/linear_search.py new file mode 100644 index 000000000..da4d9b93c --- /dev/null +++ b/algorithms/search/linear_search.py @@ -0,0 +1,13 @@ +# +# Linear search works in any array. +# +# T(n): O(n) +# + +def linear_search(array, query): + length = len(array) + for i in range(length): + if array[i] == query: + return i + + return -1 diff --git a/tests/test_search.py b/tests/test_search.py index 4567ec559..360397faf 100644 --- a/tests/test_search.py +++ b/tests/test_search.py @@ -2,6 +2,7 @@ binary_search, binary_search_recur, first_occurance, last_occurance, + linear_search, search_insert, two_sum, two_sum1, two_sum2, search_range, @@ -44,6 +45,13 @@ def test_last_occurance(self): self.assertEqual(None, last_occurance(array, 7)) self.assertEqual(0, last_occurance(array, 1)) self.assertEqual(13, last_occurance(array, 6)) + + def test_linear_search(self): + array = [1, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 6, 6, 6] + self.assertEqual(6, linear_search(array, 4)) + self.assertEqual(10, linear_search(array, 5)) + self.assertEqual(-1, linear_search(array, 7)) + self.assertEqual(-1, linear_search(array, -1)) def test_search_insert(self): array = [1,3,5,6] From 0a86bfd62dda5e116108cb430f34c02984580192 Mon Sep 17 00:00:00 2001 From: hsi1032 Date: Tue, 5 Jun 2018 19:04:47 +0900 Subject: [PATCH 321/387] Created jump_seach in algorithms/seach (#301) * Add files via upload * Update __init__.py * Update test_search.py * Create README_KR.md * Update README_KR.md * Update jump_search.py * Update jump_search.py * Update test_search.py * Update jump_search.py * Update README_KR.md update jump search * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md --- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 5 ++-- algorithms/search/__init__.py | 1 + algorithms/search/jump_search.py | 40 ++++++++++++++++++++++++++++++++ tests/test_search.py | 10 +++++++- 8 files changed, 57 insertions(+), 3 deletions(-) create mode 100644 algorithms/search/jump_search.py diff --git a/README.md b/README.md index aff2cd5af..3c9cefeb0 100644 --- a/README.md +++ b/README.md @@ -214,6 +214,7 @@ If you want to uninstall algorithms, it is as simple as: - [search_range](algorithms/search/search_range.py) - [find_min_rotate](algorithms/search/find_min_rotate.py) - [search_rotate](algorithms/search/search_rotate.py) + - [jump_search](algorithms/search/jump_search.py) - [set](algorithms/set) - [randomized_set](algorithms/set/randomized_set.py) - [set_covering](algorithms/set/set_covering.py) diff --git a/README_CN.md b/README_CN.md index 91451ff89..45d476086 100644 --- a/README_CN.md +++ b/README_CN.md @@ -195,6 +195,7 @@ pip3 uninstall -y algorithms - [count_elem：元素计数](algorithms/search/count_elem.py) - [first_occurance：首次出现](algorithms/search/first_occurance.py) - [last_occurance：最后一次出现](algorithms/search/last_occurance.py) + - [jump_search](algorithms/search/jump_search.py) - [set：集合](algorithms/set) - [randomized_set：随机集合](algorithms/set/randomized_set.py) - [set_covering：集合覆盖](algorithms/set/set_covering.py) diff --git a/README_GE.md b/README_GE.md index 89922c555..b83364139 100644 --- a/README_GE.md +++ b/README_GE.md @@ -220,6 +220,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [search_range](algorithms/search/search_range.py) - [find_min_rotate](algorithms/search/find_min_rotate.py) - [search_rotate](algorithms/search/search_rotate.py) + - [jump_search](algorithms/search/jump_search.py) - [set](algorithms/set) - [randomized_set](algorithms/set/randomized_set.py) - [set_covering](algorithms/set/set_covering.py) diff --git a/README_JP.md b/README_JP.md index 3083d72d3..de78c1c68 100644 --- a/README_JP.md +++ b/README_JP.md @@ -210,6 +210,7 @@ if __name__ == "__main__": - [search_range](algorithms/search/search_range.py) - [find_min_rotate](algorithms/search/find_min_rotate.py) - [search_rotate](algorithms/search/search_rotate.py) + - [jump_search](algorithms/search/jump_search.py) - [set : セット](algorithms/set) - [randomized_set](algorithms/set/randomized_set.py) - [set_covering](algorithms/set/set_covering.py) diff --git a/README_KR.md b/README_KR.md index 0b4c59982..871b2728e 100644 --- a/README_KR.md +++ b/README_KR.md @@ -1,4 +1,4 @@ -English(README_EN.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 한국어 | [日本語](README_JP.md) +[English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 한국어 | [日本語](README_JP.md) Python 버전 자료구조 및 알고리즘 ========================================= @@ -11,7 +11,7 @@ Python 3로 구현한 간단하고 명확한 자료구조와 알고리즘들의 ## 테스트 종류들 -### 단위별 테스트 사용 +### unittest 사용 아래 명시된 모든 테스트 실행하기: $ python3 -m unittest discover tests @@ -206,6 +206,7 @@ if __name__ == "__main__": - [search_range](algorithms/search/search_range.py) - [find_min_rotate](algorithms/search/find_min_rotate.py) - [search_rotate](algorithms/search/search_rotate.py) + - [jump_search](algorithms/search/jump_search.py) - [set : 집합](algorithms/set) - [randomized_set](algorithms/set/randomized_set.py) - [set_covering](algorithms/set/set_covering.py) diff --git a/algorithms/search/__init__.py b/algorithms/search/__init__.py index 89bea2dc8..ec3a78326 100644 --- a/algorithms/search/__init__.py +++ b/algorithms/search/__init__.py @@ -7,3 +7,4 @@ from .search_range import * from .find_min_rotate import * from .search_rotate import * +from .jump_search import * diff --git a/algorithms/search/jump_search.py b/algorithms/search/jump_search.py new file mode 100644 index 000000000..66f726a50 --- /dev/null +++ b/algorithms/search/jump_search.py @@ -0,0 +1,40 @@ +import math + +def jump_search(arr,target): + """Jump Search + Worst-case Complexity: O(√n) (root(n)) + All items in list must be sorted like binary search + + Find block that contains target value and search it linearly in that block + It returns a first target value in array + + reference: https://en.wikipedia.org/wiki/Jump_search + + """ + n = len(arr) + block_size = int(math.sqrt(n)) + block_prev = 0 + block= block_size + + # return -1 means that array doesn't contain taget value + # find block that contains target value + + if arr[n - 1] < target: + return -1 + while block <= n and arr[block - 1] < target: + block_prev = block + block += block_size + + # find target value in block + + while arr[block_prev] < target : + block_prev += 1 + if block_prev == min(block, n) : + return -1 + + # if there is target value in array, return it + + if arr[block_prev] == target : + return block_prev + else : + return -1 diff --git a/tests/test_search.py b/tests/test_search.py index 360397faf..c9f18eef7 100644 --- a/tests/test_search.py +++ b/tests/test_search.py @@ -7,7 +7,8 @@ two_sum, two_sum1, two_sum2, search_range, find_min_rotate, find_min_rotate_recur, - search_rotate, search_rotate_recur + search_rotate, search_rotate_recur, + jump_search ) import unittest @@ -96,6 +97,13 @@ def test_search_rotate(self): self.assertEqual(8, search_rotate_recur(array, 0, 11, 5)) self.assertEqual(-1, search_rotate_recur(array, 0, 11, 9)) + def test_jump_search(self): + array = [1, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 6] + self.assertEqual(10, jump_search(array, 5)) + self.assertEqual(2, jump_search(array, 3)) + self.assertEqual(-1, jump_search(array, 7)) + self.assertEqual(-1, jump_search(array, -1)) + if __name__ == '__main__': unittest.main() From f88e4999bdf41c9bfb21165b6a7fb1725dedb7a4 Mon Sep 17 00:00:00 2001 From: ppuzzle Date: Tue, 5 Jun 2018 22:14:00 +0900 Subject: [PATCH 322/387] Added link to linear search in all README files (#307) * Update README_CN.md Added linear_search.py * Update README_GE.md * Update README_JP.md * Update README_KR.md --- README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 1 + 4 files changed, 4 insertions(+) diff --git a/README_CN.md b/README_CN.md index 45d476086..8f7aee009 100644 --- a/README_CN.md +++ b/README_CN.md @@ -195,6 +195,7 @@ pip3 uninstall -y algorithms - [count_elem：元素计数](algorithms/search/count_elem.py) - [first_occurance：首次出现](algorithms/search/first_occurance.py) - [last_occurance：最后一次出现](algorithms/search/last_occurance.py) + - [linear_search](algorithms/search/linear_search.py) - [jump_search](algorithms/search/jump_search.py) - [set：集合](algorithms/set) - [randomized_set：随机集合](algorithms/set/randomized_set.py) diff --git a/README_GE.md b/README_GE.md index b83364139..da3272b6c 100644 --- a/README_GE.md +++ b/README_GE.md @@ -215,6 +215,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [binary_search](algorithms/search/binary_search.py) - [first_occurance](algorithms/search/first_occurance.py) - [last_occurance](algorithms/search/last_occurance.py) + - [linear_search](algorithms/search/linear_search.py) - [search_insert](algorithms/search/search_insert.py) - [two_sum](algorithms/search/two_sum.py) - [search_range](algorithms/search/search_range.py) diff --git a/README_JP.md b/README_JP.md index de78c1c68..9eb25e048 100644 --- a/README_JP.md +++ b/README_JP.md @@ -205,6 +205,7 @@ if __name__ == "__main__": - [binary_search](algorithms/search/binary_search.py) - [first_occurance](algorithms/search/first_occurance.py) - [last_occurance](algorithms/search/last_occurance.py) + - [linear_search](algorithms/search/linear_search.py) - [search_insert](algorithms/search/search_insert.py) - [two_sum](algorithms/search/two_sum.py) - [search_range](algorithms/search/search_range.py) diff --git a/README_KR.md b/README_KR.md index 871b2728e..7dd07f24f 100644 --- a/README_KR.md +++ b/README_KR.md @@ -201,6 +201,7 @@ if __name__ == "__main__": - [binary_search](algorithms/search/binary_search.py) - [first_occurance](algorithms/search/first_occurance.py) - [last_occurance](algorithms/search/last_occurance.py) + - [linear_search](algorithms/search/linear_search.py) - [search_insert](algorithms/search/search_insert.py) - [two_sum](algorithms/search/two_sum.py) - [search_range](algorithms/search/search_range.py) From 59db1063715533ec752d12a8b66e62358678796b Mon Sep 17 00:00:00 2001 From: ppuzzle Date: Wed, 6 Jun 2018 01:39:29 +0900 Subject: [PATCH 323/387] Created factorial.py in algorithms/maths (#309) * Create factorial.py * Update __init__.py * Update test_maths.py * Update test_maths.py I added TestFactorial, also modified TestCombination comment. * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md * Update test_maths.py * Update factorial.py --- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 1 + algorithms/maths/__init__.py | 1 + algorithms/maths/factorial.py | 20 ++++++++++++++++++++ tests/test_maths.py | 23 ++++++++++++++++++++++- 8 files changed, 48 insertions(+), 1 deletion(-) create mode 100644 algorithms/maths/factorial.py diff --git a/README.md b/README.md index 3c9cefeb0..c3fcb0aea 100644 --- a/README.md +++ b/README.md @@ -174,6 +174,7 @@ If you want to uninstall algorithms, it is as simple as: - [base_conversion](algorithms/maths/base_conversion.py) - [combination](algorithms/maths/combination.py) - [extended_gcd](algorithms/maths/extended_gcd.py) + - [factorial](algorithms/maths/factorial.py) - [gcd/lcm](algorithms/maths/gcd.py) - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py) diff --git a/README_CN.md b/README_CN.md index 8f7aee009..e1a866f32 100644 --- a/README_CN.md +++ b/README_CN.md @@ -165,6 +165,7 @@ pip3 uninstall -y algorithms - [math：数学问题](algorithms/maths) - [extended_gcd：扩展欧几里得算法](algorithms/maths/extended_gcd.py) - [combination](algorithms/maths/combination.py) + - [factorial](algorithms/maths/factorial.py) - [gcd/lcm：最大公约数和最小公倍数](algorithms/maths/gcd.py) - [prime_test：主要测试](algorithms/maths/prime_test.py) - [primes_sieve_of_eratosthenes：埃拉托色尼的质数筛](algorithms/maths/primes_sieve_of_eratosthenes.py) diff --git a/README_GE.md b/README_GE.md index da3272b6c..17cb14825 100644 --- a/README_GE.md +++ b/README_GE.md @@ -181,6 +181,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [base_conversion](algorithms/maths/base_conversion.py) - [combination](algorithms/maths/combination.py) - [extended_gcd](algorithms/maths/extended_gcd.py) + - [factorial](algorithms/maths/factorial.py) - [gcd/lcm](algorithms/maths/gcd.py) - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py) diff --git a/README_JP.md b/README_JP.md index 9eb25e048..043c4bcda 100644 --- a/README_JP.md +++ b/README_JP.md @@ -171,6 +171,7 @@ if __name__ == "__main__": - [base_conversion](algorithms/maths/base_conversion.py) - [combination](algorithms/maths/combination.py) - [extended_gcd](algorithms/maths/extended_gcd.py) + - [factorial](algorithms/maths/factorial.py) - [gcd/lcm](algorithms/maths/gcd.py) - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py) diff --git a/README_KR.md b/README_KR.md index 7dd07f24f..45e2eafef 100644 --- a/README_KR.md +++ b/README_KR.md @@ -167,6 +167,7 @@ if __name__ == "__main__": - [base_conversion](algorithms/maths/base_conversion.py) - [combination](algorithms/maths/combination.py) - [extended_gcd](algorithms/maths/extended_gcd.py) + - [factorial](algorithms/maths/factorial.py) - [gcd/lcm](algorithms/maths/gcd.py) - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py) diff --git a/algorithms/maths/__init__.py b/algorithms/maths/__init__.py index d791ad864..2bf44a78f 100644 --- a/algorithms/maths/__init__.py +++ b/algorithms/maths/__init__.py @@ -1,5 +1,6 @@ from .base_conversion import * from .extended_gcd import * +from .factorial import * from .gcd import * from .generate_strobogrammtic import * from .is_strobogrammatic import * diff --git a/algorithms/maths/factorial.py b/algorithms/maths/factorial.py new file mode 100644 index 000000000..2cd1a3491 --- /dev/null +++ b/algorithms/maths/factorial.py @@ -0,0 +1,20 @@ +# +# This function calculates n! +# Factorial function not works in less than 0 +# + +def factorial(n): + + result = 1 + for i in range(2, n+1): + result *= i + + return result + + +def factorial_recur(n): + if n == 0: + return 1 + + return n * factorial(n-1) + diff --git a/tests/test_maths.py b/tests/test_maths.py index fbf0772aa..a5ca21fda 100644 --- a/tests/test_maths.py +++ b/tests/test_maths.py @@ -1,6 +1,7 @@ from algorithms.maths import ( int2base, base2int, extended_gcd, + factorial, factorial_recur, gcd, lcm, gen_strobogrammatic, strobogrammatic_in_range, is_strobogrammatic, is_strobogrammatic2, @@ -205,7 +206,7 @@ def test_encrypt_decrypt(self): class TestCombination(unittest.TestCase): """[summary] - Test for the file rsa.py + Test for the file combination.py Arguments: unittest {[type]} -- [description] @@ -215,5 +216,25 @@ def test_combination(self): self.assertEqual(10, combination(5, 2)) self.assertEqual(252, combination(10, 5)) +class TestFactorial(unittest.TestCase): + """[summary] + Test for the file factorial.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_factorial(self): + self.assertEqual(1, factorial(0)) + self.assertEqual(120, factorial(5)) + self.assertEqual(3628800, factorial(10)) + + def test_factorial_recur(self): + self.assertEqual(1, factorial_recur(0)) + self.assertEqual(120, factorial_recur(5)) + self.assertEqual(3628800, factorial_recur(10)) + if __name__ == "__main__": unittest.main() + + From 3e14809acb04343810efd12f0d5c01b8473f02ff Mon Sep 17 00:00:00 2001 From: Han SangWook <9967han@naver.com> Date: Wed, 6 Jun 2018 03:42:49 +0900 Subject: [PATCH 324/387] Created bogo_sort.py in algorithms/sort (#308) * Create bogo_sort.py * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md * Update test_sort.py * Update __init__.py * Update test_sort.py * Update test_sort.py * Update bogo_sort.py * Update bogo_sort.py --- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 1 + algorithms/sort/__init__.py | 1 + algorithms/sort/bogo_sort.py | 22 ++++++++++++++++++++++ tests/test_sort.py | 5 +++++ 8 files changed, 33 insertions(+) create mode 100644 algorithms/sort/bogo_sort.py diff --git a/README.md b/README.md index c3fcb0aea..72aeaa230 100644 --- a/README.md +++ b/README.md @@ -220,6 +220,7 @@ If you want to uninstall algorithms, it is as simple as: - [randomized_set](algorithms/set/randomized_set.py) - [set_covering](algorithms/set/set_covering.py) - [sort](algorithms/sort) + - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort](algorithms/sort/bubble_sort.py) - [bucket_sort](algorithms/sort/bucket_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) diff --git a/README_CN.md b/README_CN.md index e1a866f32..8683e6597 100644 --- a/README_CN.md +++ b/README_CN.md @@ -202,6 +202,7 @@ pip3 uninstall -y algorithms - [randomized_set：随机集合](algorithms/set/randomized_set.py) - [set_covering：集合覆盖](algorithms/set/set_covering.py) - [sort：排序](algorithms/sort) + - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort：冒泡排序](algorithms/sort/bubble_sort.py) - [bucket_sort](algorithms/sort/bucket_sort.py) - [comb_sort：梳排序](algorithms/sort/comb_sort.py) diff --git a/README_GE.md b/README_GE.md index 17cb14825..22c3703f4 100644 --- a/README_GE.md +++ b/README_GE.md @@ -227,6 +227,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [randomized_set](algorithms/set/randomized_set.py) - [set_covering](algorithms/set/set_covering.py) - [sort](algorithms/sort) + - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort](algorithms/sort/bubble_sort.py) - [bucket_sort](algorithms/sort/bucket_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) diff --git a/README_JP.md b/README_JP.md index 043c4bcda..c9ba3ff2b 100644 --- a/README_JP.md +++ b/README_JP.md @@ -217,6 +217,7 @@ if __name__ == "__main__": - [randomized_set](algorithms/set/randomized_set.py) - [set_covering](algorithms/set/set_covering.py) - [sort : ソート](algorithms/sort) + - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort](algorithms/sort/bubble_sort.py) - [bucket_sort](algorithms/sort/bucket_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) diff --git a/README_KR.md b/README_KR.md index 45e2eafef..89f82926d 100644 --- a/README_KR.md +++ b/README_KR.md @@ -213,6 +213,7 @@ if __name__ == "__main__": - [randomized_set](algorithms/set/randomized_set.py) - [set_covering](algorithms/set/set_covering.py) - [sort : 정렬 알고리즘](algorithms/sort) + - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort](algorithms/sort/bubble_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) diff --git a/algorithms/sort/__init__.py b/algorithms/sort/__init__.py index d86e2bce3..c7e0de2cb 100644 --- a/algorithms/sort/__init__.py +++ b/algorithms/sort/__init__.py @@ -1,3 +1,4 @@ +from .bogo_sort import * from .bubble_sort import * from .comb_sort import * from .counting_sort import * diff --git a/algorithms/sort/bogo_sort.py b/algorithms/sort/bogo_sort.py new file mode 100644 index 000000000..074a6afca --- /dev/null +++ b/algorithms/sort/bogo_sort.py @@ -0,0 +1,22 @@ +import random + +def bogo_sort(arr): + """Bogo Sort + Best Case Complexity: O(n) + Worst Case Complexity: O(∞) + Average Case Complexity: O(n(n-1)!) + """ + def is_sorted(arr): + #check the array is inorder + i = 0 + arr_len = len(arr) + while i+1 < arr_len: + if arr[i] > arr[i+1]: + return False + i += 1 + return True + while not is_sorted(arr): + random.shuffle(arr) + return arr + + diff --git a/tests/test_sort.py b/tests/test_sort.py index 4665259ab..adbb8f119 100644 --- a/tests/test_sort.py +++ b/tests/test_sort.py @@ -1,4 +1,5 @@ from algorithms.sort import ( + bogo_sort, bubble_sort, comb_sort, counting_sort, @@ -16,6 +17,10 @@ class TestSuite(unittest.TestCase): + def test_bogo_sort(self): + self.assertEqual([1, 5, 23], + bogo_sort([1, 23, 5])) + def test_bubble_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], bubble_sort([1, 5, 65, 23, 57, 1232])) From 1220a742917d37f2f9377bb22909c3a12deb47fd Mon Sep 17 00:00:00 2001 From: Lee Geon Date: Wed, 6 Jun 2018 12:14:56 +0900 Subject: [PATCH 325/387] Fixed links in README files (#312) * Update README_CN.md * Update README.md * Update README_GE.md * Update README_JP.md * Update README_KR.md --- README.md | 8 ++++---- README_CN.md | 8 ++++---- README_GE.md | 8 ++++---- README_JP.md | 10 +++++----- README_KR.md | 11 ++++++----- 5 files changed, 23 insertions(+), 22 deletions(-) diff --git a/README.md b/README.md index 72aeaa230..9d9bb1291 100644 --- a/README.md +++ b/README.md @@ -62,11 +62,11 @@ If you want to uninstall algorithms, it is as simple as: - [merge_intervals](algorithms/arrays/merge_intervals.py) - [missing_ranges](algorithms/arrays/missing_ranges.py) - [plus_one](algorithms/arrays/plus_one.py) -    - [rotate_array](algorithms/arrays/rotate_array.py) - - [summary_ranges](algorithms/arrays/summary_ranges.py) +    - [rotate](algorithms/arrays/rotate.py) + - [summarize_ranges](algorithms/arrays/summarize_ranges.py) - [three_sum](algorithms/arrays/three_sum.py) - [two_sum](algorithms/arrays/two_sum.py) - - [move_zeros_to_end](algorithms/arrays/move_zeros_to_end.py) + - [move_zeros](algorithms/arrays/move_zeros.py) - [backtrack](algorithms/backtrack) - [general_solution.md](algorithms/backtrack/) - [anagram](algorithms/backtrack/anagram.py) @@ -234,7 +234,7 @@ If you want to uninstall algorithms, it is as simple as: - [selection_sort](algorithms/sort/selection_sort.py) - [shell_sort](algorithms/sort/shell_sort.py) - [sort_colors](algorithms/sort/sort_colors.py) - - [topsort](algorithms/sort/topsort.py) + - [top_sort](algorithms/sort/top_sort.py) - [wiggle_sort](algorithms/sort/wiggle_sort.py) - [stack](algorithms/stack) - [longest_abs_path](algorithms/stack/longest_abs_path.py) diff --git a/README_CN.md b/README_CN.md index 8683e6597..0461b107e 100644 --- a/README_CN.md +++ b/README_CN.md @@ -75,11 +75,11 @@ pip3 uninstall -y algorithms - [merge_intervals：合并重叠间隔](algorithms/arrays/merge_intervals.py) - [missing_ranges：遗失的范围](algorithms/arrays/missing_ranges.py) - [plus_one：加一运算](algorithms/arrays/plus_one.py) - - [rotate_array：反转数组](algorithms/arrays/rotate_array.py) - - [summary_ranges：数组范围](algorithms/arrays/summary_ranges.py) + - [rotate：反转数组](algorithms/arrays/rotate.py) + - [summarize_ranges：数组范围](algorithms/arrays/summarize_ranges.py) - [three_sum：三数和为零](algorithms/arrays/three_sum.py) - [two_sum：两数和](algorithms/arrays/two_sum.py) - - [move_zeros_to_end: 0后置问题](algorithms/arrays/move_zeros_to_end.py) + - [move_zeros: 0后置问题](algorithms/arrays/move_zeros.py) - [backtrack：回溯](algorithms/backtrack) - [general_solution.md：一般方法](algorithms/backtrack/) - [anagram：同字母异序词](algorithms/backtrack/anagram.py) @@ -216,7 +216,7 @@ pip3 uninstall -y algorithms - [selection_sort：选择排序](algorithms/sort/selection_sort.py) - [shell_sort](algorithms/sort/shell_sort.py) - [sort_colors：颜色排序](algorithms/sort/sort_colors.py) - - [topsort：top排序](algorithms/sort/topsort.py) + - [top_sort：top排序](algorithms/sort/top_sort.py) - [wiggle_sort：摇摆排序](algorithms/sort/wiggle_sort.py) - [stack：栈](algorithms/stack) - [longest_abs_path：最长相对路径](algorithms/stack/longest_abs_path.py) diff --git a/README_GE.md b/README_GE.md index 22c3703f4..8aba1d043 100644 --- a/README_GE.md +++ b/README_GE.md @@ -69,11 +69,11 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [merge_intervals](algorithms/arrays/merge_intervals.py) - [missing_ranges](algorithms/arrays/missing_ranges.py) - [plus_one](algorithms/arrays/plus_one.py) -    - [rotate_array](algorithms/arrays/rotate_array.py) - - [summary_ranges](algorithms/arrays/summary_ranges.py) +    - [rotate](algorithms/arrays/rotate.py) + - [summarize_ranges](algorithms/arrays/summarize_ranges.py) - [three_sum](algorithms/arrays/three_sum.py) - [two_sum](algorithms/arrays/two_sum.py) - - [move_zeros_to_end](algorithms/arrays/move_zeros_to_end.py) + - [move_zeros](algorithms/arrays/move_zeros.py) - [backtrack](algorithms/backtrack) - [general_solution.md](algorithms/backtrack/) - [anagram](algorithms/backtrack/anagram.py) @@ -241,7 +241,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [selection_sort](algorithms/sort/selection_sort.py) - [shell_sort](algorithms/sort/shell_sort.py) - [sort_colors](algorithms/sort/sort_colors.py) - - [topsort](algorithms/sort/topsort.py) + - [top_sort](algorithms/sort/top_sort.py) - [wiggle_sort](algorithms/sort/wiggle_sort.py) - [stack](algorithms/stack) - [longest_abs_path](algorithms/stack/longest_abs_path.py) diff --git a/README_JP.md b/README_JP.md index c9ba3ff2b..ba06e6dd7 100644 --- a/README_JP.md +++ b/README_JP.md @@ -54,16 +54,16 @@ if __name__ == "__main__": - [flatten](algorithms/arrays/flatten.py) - [garage](algorithms/arrays/garage.py) - [josephus_problem](algorithms/arrays/josephus.py) - - [max_ones_index](algorithms/arrays/max_ones_index.py) - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) + - [max_ones_index](algorithms/arrays/max_ones_index.py) - [merge_intervals](algorithms/arrays/merge_intervals.py) - [missing_ranges](algorithms/arrays/missing_ranges.py) - [plus_one](algorithms/arrays/plus_one.py) - - [rotate_array](algorithms/arrays/rotate_array.py) - - [summary_ranges](algorithms/arrays/summary_ranges.py) +    - [rotate](algorithms/arrays/rotate.py) + - [summarize_ranges](algorithms/arrays/summarize_ranges.py) - [three_sum](algorithms/arrays/three_sum.py) - [two_sum](algorithms/arrays/two_sum.py) - - [move_zeros_to_end](algorithms/arrays/move_zeros_to_end.py) + - [move_zeros](algorithms/arrays/move_zeros.py) - [backtrack : バックトラッキング](algorithms/backtrack) - [general_solution.md](algorithms/backtrack/) - [anagram](algorithms/backtrack/anagram.py) @@ -231,7 +231,7 @@ if __name__ == "__main__": - [selection_sort](algorithms/sort/selection_sort.py) - [shell_sort](algorithms/sort/shell_sort.py) - [sort_colors](algorithms/sort/sort_colors.py) - - [topsort](algorithms/sort/topsort.py) + - [top_sort](algorithms/sort/top_sort.py) - [wiggle_sort](algorithms/sort/wiggle_sort.py) - [stack : スタック](algorithms/stack) - [longest_abs_path](algorithms/stack/longest_abs_path.py) diff --git a/README_KR.md b/README_KR.md index 89f82926d..f5aee1ba1 100644 --- a/README_KR.md +++ b/README_KR.md @@ -52,16 +52,17 @@ if __name__ == "__main__": - [delete_nth](algorithms/arrays/delete_nth.py) - [flatten](algorithms/arrays/flatten.py) - [garage](algorithms/arrays/garage.py) - - [josephus_problem](algorithms/arrays/josephus_problem.py) + - [josephus_problem](algorithms/arrays/josephus.py) - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) + - [max_ones_index](algorithms/arrays/max_ones_index.py) - [merge_intervals](algorithms/arrays/merge_intervals.py) - [missing_ranges](algorithms/arrays/missing_ranges.py) - [plus_one](algorithms/arrays/plus_one.py) - - [rotate_array](algorithms/arrays/rotate_array.py) - - [summary_ranges](algorithms/arrays/summary_ranges.py) +    - [rotate](algorithms/arrays/rotate.py) + - [summarize_ranges](algorithms/arrays/summarize_ranges.py) - [three_sum](algorithms/arrays/three_sum.py) - [two_sum](algorithms/arrays/two_sum.py) - - [move_zeros_to_end](algorithms/arrays/move_zeros_to_end.py) + - [move_zeros](algorithms/arrays/move_zeros.py) - [backtrack : 백트래킹](algorithms/backtrack) - [general_solution.md](algorithms/backtrack/) - [anagram](algorithms/backtrack/anagram.py) @@ -225,7 +226,7 @@ if __name__ == "__main__": - [radix_sort](algorithms/sort/radix_sort.py) - [selection_sort](algorithms/sort/selection_sort.py) - [sort_colors](algorithms/sort/sort_colors.py) - - [topsort](algorithms/sort/topsort.py) + - [top_sort](algorithms/sort/top_sort.py) - [wiggle_sort](algorithms/sort/wiggle_sort.py) - [stack : 스택](algorithms/stack) - [longest_abs_path](algorithms/stack/longest_abs_path.py) From 4c93de3eedc0f9e175ec4730092afa686615e619 Mon Sep 17 00:00:00 2001 From: Keon Date: Wed, 6 Jun 2018 03:05:47 -0400 Subject: [PATCH 326/387] Add documentation template (#314) * add docs template * add logo * create documentation template --- .gitignore | 2 + README.md | 2 + algorithms/__init__.py | 0 docs/Makefile | 20 +++ docs/make.bat | 36 +++++ docs/requirements.txt | 21 +++ docs/source/_static/algorithms_logo.png | Bin 0 -> 11878 bytes docs/source/arrays.rst | 16 +++ docs/source/backtrack.rst | 5 + docs/source/bfs.rst | 5 + docs/source/bit.rst | 5 + docs/source/conf.py | 177 ++++++++++++++++++++++++ docs/source/dfs.rst | 5 + docs/source/dp.rst | 5 + docs/source/examples.rst | 5 + docs/source/graph.rst | 5 + docs/source/heap.rst | 5 + docs/source/index.rst | 38 +++++ docs/source/linkedlist.rst | 5 + docs/source/map.rst | 5 + docs/source/maths.rst | 5 + docs/source/matrix.rst | 5 + docs/source/queues.rst | 5 + docs/source/search.rst | 5 + docs/source/set.rst | 5 + docs/source/sort.rst | 5 + docs/source/stack.rst | 5 + docs/source/strings.rst | 5 + docs/source/tree.rst | 5 + setup.py | 2 + 30 files changed, 409 insertions(+) create mode 100644 algorithms/__init__.py create mode 100644 docs/Makefile create mode 100644 docs/make.bat create mode 100644 docs/requirements.txt create mode 100644 docs/source/_static/algorithms_logo.png create mode 100644 docs/source/arrays.rst create mode 100644 docs/source/backtrack.rst create mode 100644 docs/source/bfs.rst create mode 100644 docs/source/bit.rst create mode 100644 docs/source/conf.py create mode 100644 docs/source/dfs.rst create mode 100644 docs/source/dp.rst create mode 100644 docs/source/examples.rst create mode 100644 docs/source/graph.rst create mode 100644 docs/source/heap.rst create mode 100644 docs/source/index.rst create mode 100644 docs/source/linkedlist.rst create mode 100644 docs/source/map.rst create mode 100644 docs/source/maths.rst create mode 100644 docs/source/matrix.rst create mode 100644 docs/source/queues.rst create mode 100644 docs/source/search.rst create mode 100644 docs/source/set.rst create mode 100644 docs/source/sort.rst create mode 100644 docs/source/stack.rst create mode 100644 docs/source/strings.rst create mode 100644 docs/source/tree.rst diff --git a/.gitignore b/.gitignore index 86f7f584d..99f920b84 100755 --- a/.gitignore +++ b/.gitignore @@ -11,3 +11,5 @@ __pycache__/ # Python egg metadata, regenerated from source files by setuptools. /*.egg-info /*.egg +# docs +build/ diff --git a/README.md b/README.md index 9d9bb1291..e9ddbb7be 100644 --- a/README.md +++ b/README.md @@ -1,3 +1,5 @@ +

+ English | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) diff --git a/algorithms/__init__.py b/algorithms/__init__.py new file mode 100644 index 000000000..e69de29bb diff --git a/docs/Makefile b/docs/Makefile new file mode 100644 index 000000000..06f6415a1 --- /dev/null +++ b/docs/Makefile @@ -0,0 +1,20 @@ +# Minimal makefile for Sphinx documentation +# + +# You can set these variables from the command line. +SPHINXOPTS = +SPHINXBUILD = sphinx-build +SPHINXPROJ = algorithms +SOURCEDIR = source +BUILDDIR = build + +# Put it first so that "make" without argument is like "make help". +help: + @$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O) + +.PHONY: help Makefile + +# Catch-all target: route all unknown targets to Sphinx using the new +# "make mode" option. $(O) is meant as a shortcut for $(SPHINXOPTS). +%: Makefile + @$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O) diff --git a/docs/make.bat b/docs/make.bat new file mode 100644 index 000000000..a515cfe0d --- /dev/null +++ b/docs/make.bat @@ -0,0 +1,36 @@ +@ECHO OFF + +pushd %~dp0 + +REM Command file for Sphinx documentation + +if "%SPHINXBUILD%" == "" ( + set SPHINXBUILD=sphinx-build +) +set SOURCEDIR=source +set BUILDDIR=build +set SPHINXPROJ=algorithms + +if "%1" == "" goto help + +%SPHINXBUILD% >NUL 2>NUL +if errorlevel 9009 ( + echo. + echo.The 'sphinx-build' command was not found. Make sure you have Sphinx + echo.installed, then set the SPHINXBUILD environment variable to point + echo.to the full path of the 'sphinx-build' executable. Alternatively you + echo.may add the Sphinx directory to PATH. + echo. + echo.If you don't have Sphinx installed, grab it from + echo.http://sphinx-doc.org/ + exit /b 1 +) + +%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% +goto end + +:help +%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% + +:end +popd diff --git a/docs/requirements.txt b/docs/requirements.txt new file mode 100644 index 000000000..3f4e532f7 --- /dev/null +++ b/docs/requirements.txt @@ -0,0 +1,21 @@ +# Progress bars on iterators +tqdm +sphinx_rtd_theme + +# Downloading data and other files +requests + +# Required for tests only: + +# Style-checking for PEP8 +flake8 + +# Run unit tests +pytest + +# Lets pytest find our code by automatically modifying PYTHONPATH +pytest-pythonpath + +# Coverage statistics +pytest-cov +codecov diff --git a/docs/source/_static/algorithms_logo.png b/docs/source/_static/algorithms_logo.png new file mode 100644 index 0000000000000000000000000000000000000000..2e8487d9e7381397f77c36b2cc862cc286b4487c GIT binary patch literal 11878 zcmd6N_amEM^nVDoM^Jl)QnjiSwf7!1o0bwuQ58k)RY@tai_+GtQfenv(VDSKt(qyd z_l~N)zUlk(`Th@|^TYEbcbt39J@-E6-g92Dcg+nLXt`+t004uLp{^AG00fbK1>--;1K(4o|yQ zvYje7MDMs&4NQA%`A!dX!8Pc+9Z!7+)ZFsU@3*<3(Er!SFg&E4Q8P8*7Utg4jLN!d ztr(Gp7(VMc@LpFW*d7>4z5$2_Y~h1u-Dhc`+6{xoTeqO$Q1fVCd*lj=6=k6o$pQkc ztp`H>yxKqFgwzs0>4{|Ipd!e3fN9vp{1A=DKvA+Cvf6f9%p(7_&D=8)jOmCtI z3Z;?&xe|7=6%aL(~`1)^gf23P?8Q_=6gf3m*x&$^c5y4-m(73XRa>eef?CJ!8>^WUqDK z3Zu@klqmj?0umSQnPp9#^Bj9d}_aE5?77FsUtp683> zz~E~?H;vje@t^P1G|~_gvnSX=v0JxW6*V>xj5jB-Y9LUzWwjV66zH)ua&Q-#^Iro` zmceC0Za^hFNIb>W0z4)<(-AfaQ~4T)mjA#(G!hYoeZ*P^un~o!i3HNZD}4Vh4gC$GivONnB?M;qv38Uom~f@v|8dvkA$DS?(eb-pQ(?=J-In|<(kM$GEE=B~-C8dNz$q*r3h4XsjlMpT_I-4CLNl#

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If the directory is relative to the +# documentation root, use os.path.abspath to make it absolute, like shown here. +# +# import os +# import sys +# sys.path.insert(0, os.path.abspath('.')) +from recommonmark.parser import CommonMarkParser + +# -- General configuration ------------------------------------------------ + +# If your documentation needs a minimal Sphinx version, state it here. +# +# needs_sphinx = '1.0' + +# Add any Sphinx extension module names here, as strings. They can be +# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom +# ones. +extensions = ['sphinx.ext.autodoc', + 'sphinx.ext.doctest', + 'sphinx.ext.todo', + 'sphinx.ext.coverage', + 'sphinx.ext.mathjax', + 'sphinx.ext.ifconfig', + 'sphinx.ext.viewcode', + 'sphinx.ext.githubpages'] + +# Add any paths that contain templates here, relative to this directory. +templates_path = ['_templates'] + +# The suffix(es) of source filenames. +# You can specify multiple suffix as a list of string: +# +source_parsers = { + '.md': CommonMarkParser +} +source_suffix = ['.rst', '.md'] + +# The master toctree document. +master_doc = 'index' + +# General information about the project. +project = 'algorithms' +copyright = '2018, Algorithms Team & Contributors' +author = 'Algorithms Team & Contributors' + +# The version info for the project you're documenting, acts as replacement for +# |version| and |release|, also used in various other places throughout the +# built documents. +# +# The short X.Y version. +version = '0.1.0' +# The full version, including alpha/beta/rc tags. +release = '0.1.0' + +# The language for content autogenerated by Sphinx. Refer to documentation +# for a list of supported languages. +# +# This is also used if you do content translation via gettext catalogs. +# Usually you set "language" from the command line for these cases. +language = None + +# List of patterns, relative to source directory, that match files and +# directories to ignore when looking for source files. +# This patterns also effect to html_static_path and html_extra_path +exclude_patterns = [] + +# The name of the Pygments (syntax highlighting) style to use. +pygments_style = 'sphinx' + +# If true, `todo` and `todoList` produce output, else they produce nothing. +todo_include_todos = True + + +# -- Options for HTML output ---------------------------------------------- + +# The theme to use for HTML and HTML Help pages. See the documentation for +# a list of builtin themes. +# +html_theme = 'alabaster' + +# Theme options are theme-specific and customize the look and feel of a theme +# further. For a list of options available for each theme, see the +# documentation. +# +# html_theme_options = {} + +# Add any paths that contain custom static files (such as style sheets) here, +# relative to this directory. They are copied after the builtin static files, +# so a file named "default.css" will overwrite the builtin "default.css". +html_static_path = ['_static'] + +# Custom sidebar templates, must be a dictionary that maps document names +# to template names. +# +# This is required for the alabaster theme +# refs: http://alabaster.readthedocs.io/en/latest/installation.html#sidebars +html_sidebars = { + '**': [ + 'about.html', + 'searchbox.html', + 'navigation.html', + 'relations.html', # needs 'show_related': True theme option to display + ] +} + + +# -- Options for HTMLHelp output ------------------------------------------ + +# Output file base name for HTML help builder. +htmlhelp_basename = 'algorithmsdoc' + + +# -- Options for LaTeX output --------------------------------------------- + +latex_elements = { + # The paper size ('letterpaper' or 'a4paper'). + # + # 'papersize': 'letterpaper', + + # The font size ('10pt', '11pt' or '12pt'). + # + # 'pointsize': '10pt', + + # Additional stuff for the LaTeX preamble. + # + # 'preamble': '', + + # Latex figure (float) alignment + # + # 'figure_align': 'htbp', +} + +# Grouping the document tree into LaTeX files. List of tuples +# (source start file, target name, title, +# author, documentclass [howto, manual, or own class]). +latex_documents = [ + (master_doc, 'algorithms.tex', 'algorithms Documentation', + 'Algorithms Team \\& Contributors', 'manual'), +] + + +# -- Options for manual page output --------------------------------------- + +# One entry per manual page. List of tuples +# (source start file, name, description, authors, manual section). +man_pages = [ + (master_doc, 'algorithms', 'algorithms Documentation', + [author], 1) +] + + +# -- Options for Texinfo output ------------------------------------------- + +# Grouping the document tree into Texinfo files. List of tuples +# (source start file, target name, title, author, +# dir menu entry, description, category) +texinfo_documents = [ + (master_doc, 'algorithms', 'algorithms Documentation', + author, 'algorithms', 'One line description of project.', + 'Miscellaneous'), +] diff --git a/docs/source/dfs.rst b/docs/source/dfs.rst new file mode 100644 index 000000000..1d2c5b6de --- /dev/null +++ b/docs/source/dfs.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.dfs +================= diff --git a/docs/source/dp.rst b/docs/source/dp.rst new file mode 100644 index 000000000..1cc92081e --- /dev/null +++ b/docs/source/dp.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.dp +================= diff --git a/docs/source/examples.rst b/docs/source/examples.rst new file mode 100644 index 000000000..5d3cbdd76 --- /dev/null +++ b/docs/source/examples.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +Examples +================= diff --git a/docs/source/graph.rst b/docs/source/graph.rst new file mode 100644 index 000000000..925d10524 --- /dev/null +++ b/docs/source/graph.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.graph +================= diff --git a/docs/source/heap.rst b/docs/source/heap.rst new file mode 100644 index 000000000..068578a3e --- /dev/null +++ b/docs/source/heap.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.heap +================= diff --git a/docs/source/index.rst b/docs/source/index.rst new file mode 100644 index 000000000..d751ceea4 --- /dev/null +++ b/docs/source/index.rst @@ -0,0 +1,38 @@ +.. image:: /_static/algorithms_logo.png + :target: https://github.com/keon/algorithms + :scale: 50 % + +The :mod:`algorithms` package consists of +minimal and clean example implementations of data structures and algorithms. + +.. toctree:: + :maxdepth: 2 + :caption: Package Reference + + self + algorithms.arrays + algorithms.backtrack + algorithms.bfs + algorithms.bit + algorithms.dfs + algorithms.dp + algorithms.graph + algorithms.heap + algorithms.linkedlist + algorithms.map + algorithms.maths + algorithms.matrix + algorithms.queues + algorithms.search + algorithms.set + algorithms.sort + algorithms.stack + algorithms.strings + algorithms.tree + examples + +Indices and tables +================== + +* :ref:`genindex` +* :ref:`modindex` diff --git a/docs/source/linkedlist.rst b/docs/source/linkedlist.rst new file mode 100644 index 000000000..4a37b37e5 --- /dev/null +++ b/docs/source/linkedlist.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.linkedlist +===================== diff --git a/docs/source/map.rst b/docs/source/map.rst new file mode 100644 index 000000000..31d281f85 --- /dev/null +++ b/docs/source/map.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.map +================= diff --git a/docs/source/maths.rst b/docs/source/maths.rst new file mode 100644 index 000000000..1a45b7957 --- /dev/null +++ b/docs/source/maths.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.maths +================= diff --git a/docs/source/matrix.rst b/docs/source/matrix.rst new file mode 100644 index 000000000..4d06e70a4 --- /dev/null +++ b/docs/source/matrix.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.matrix +================= diff --git a/docs/source/queues.rst b/docs/source/queues.rst new file mode 100644 index 000000000..3ee9e18a7 --- /dev/null +++ b/docs/source/queues.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.queue +================= diff --git a/docs/source/search.rst b/docs/source/search.rst new file mode 100644 index 000000000..091f0bf05 --- /dev/null +++ b/docs/source/search.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.search +================= diff --git a/docs/source/set.rst b/docs/source/set.rst new file mode 100644 index 000000000..80984858b --- /dev/null +++ b/docs/source/set.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.set +================= diff --git a/docs/source/sort.rst b/docs/source/sort.rst new file mode 100644 index 000000000..0b106e37b --- /dev/null +++ b/docs/source/sort.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.sort +================= diff --git a/docs/source/stack.rst b/docs/source/stack.rst new file mode 100644 index 000000000..ad1f76525 --- /dev/null +++ b/docs/source/stack.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.stack +================= diff --git a/docs/source/strings.rst b/docs/source/strings.rst new file mode 100644 index 000000000..708df2a0b --- /dev/null +++ b/docs/source/strings.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.string +================= diff --git a/docs/source/tree.rst b/docs/source/tree.rst new file mode 100644 index 000000000..1dea821b4 --- /dev/null +++ b/docs/source/tree.rst @@ -0,0 +1,5 @@ +.. role:: hidden + :class: hidden-section + +algorithms.tree +================= diff --git a/setup.py b/setup.py index b7374e85c..1bb71d3b6 100644 --- a/setup.py +++ b/setup.py @@ -1,4 +1,6 @@ import os +import io +import re from setuptools import find_packages, setup setup(name='algorithms', From 43ccd21b7087b6df47c468727c390e67cf1f2172 Mon Sep 17 00:00:00 2001 From: ppuzzle Date: Wed, 6 Jun 2018 17:08:12 +0900 Subject: [PATCH 327/387] Added link to OS Helpers, Build Status, and Coverage Status in README files. (#316) * Update README_CN.md * Update README_JP.md * Update README_KR.md --- README_CN.md | 4 ++++ README_JP.md | 4 ++++ README_KR.md | 4 ++++ 3 files changed, 12 insertions(+) diff --git a/README_CN.md b/README_CN.md index 0461b107e..683830cd4 100644 --- a/README_CN.md +++ b/README_CN.md @@ -1,5 +1,9 @@ [English](README.md) | 简体中文 | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) +[![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) +[![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) +[![Coverage Status](https://coveralls.io/repos/github/keon/algorithms/badge.svg?branch=master)](https://coveralls.io/github/keon/algorithms?branch=master) + Python版数据结构和算法 ========================================= diff --git a/README_JP.md b/README_JP.md index ba06e6dd7..8e18adcb1 100644 --- a/README_JP.md +++ b/README_JP.md @@ -1,5 +1,9 @@ [English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 日本語 | [한국어](README_KR.md) +[![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) +[![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) +[![Coverage Status](https://coveralls.io/repos/github/keon/algorithms/badge.svg?branch=master)](https://coveralls.io/github/keon/algorithms?branch=master) + Pythonのデータ構造とアルゴリズム ========================================= diff --git a/README_KR.md b/README_KR.md index f5aee1ba1..08d41dccb 100644 --- a/README_KR.md +++ b/README_KR.md @@ -1,5 +1,9 @@ [English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 한국어 | [日本語](README_JP.md) +[![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) +[![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) +[![Coverage Status](https://coveralls.io/repos/github/keon/algorithms/badge.svg?branch=master)](https://coveralls.io/github/keon/algorithms?branch=master) + Python 버전 자료구조 및 알고리즘 ========================================= From 6b662a108196b09c25fdc1ef27a553296b917cb0 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Wed, 6 Jun 2018 14:52:59 +0530 Subject: [PATCH 328/387] Created PULL_REQUEST_TEMPLATE.md (#311) * Create PULL_REQUEST_TEMPLATE.md * review change --- PULL_REQUEST_TEMPLATE.md | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 PULL_REQUEST_TEMPLATE.md diff --git a/PULL_REQUEST_TEMPLATE.md b/PULL_REQUEST_TEMPLATE.md new file mode 100644 index 000000000..3de1ba41a --- /dev/null +++ b/PULL_REQUEST_TEMPLATE.md @@ -0,0 +1,13 @@ +(Put an `X` inside the `[ ]` to denote check mark `[X]`.) + + +- [ ] **If creating a new file :** + - [ ] added links to it in the README files ? + - [ ] included tests with it ? + - [ ] added description (overview of algorithm, time and space compleixty, and possible edge case) in docstrings ? + +- [ ] **if done some changes :** + - [ ] wrote short description in the PR explaining what the changes do ? + - [ ] Fixes #[issue number] if related to any issue + +- [ ] **other** From d0464ccc31ffdf782eb176af7e03c4864d92d251 Mon Sep 17 00:00:00 2001 From: hsi1032 Date: Wed, 6 Jun 2018 18:24:49 +0900 Subject: [PATCH 329/387] Create cocktail_shaker_sort and add test case (#310) * Create cocktail_shaker_sort.py * Update __init__.py * Update test_sort.py * Update test_sort.py * Update README.md * Update README_CN.md * Update README_CN.md * Update README.md * Update README_GE.md * Update README_JP.md * Update README_KR.md --- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 1 + algorithms/sort/__init__.py | 1 + algorithms/sort/cocktail_shaker_sort.py | 30 +++++++++++++++++++++++++ tests/test_sort.py | 8 +++++-- 8 files changed, 42 insertions(+), 2 deletions(-) create mode 100644 algorithms/sort/cocktail_shaker_sort.py diff --git a/README.md b/README.md index e9ddbb7be..bdfc343aa 100644 --- a/README.md +++ b/README.md @@ -225,6 +225,7 @@ If you want to uninstall algorithms, it is as simple as: - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort](algorithms/sort/bubble_sort.py) - [bucket_sort](algorithms/sort/bucket_sort.py) + - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) - [heap_sort](algorithms/sort/heap_sort.py) diff --git a/README_CN.md b/README_CN.md index 683830cd4..7f0abeaa6 100644 --- a/README_CN.md +++ b/README_CN.md @@ -209,6 +209,7 @@ pip3 uninstall -y algorithms - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort：冒泡排序](algorithms/sort/bubble_sort.py) - [bucket_sort](algorithms/sort/bucket_sort.py) + - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort：梳排序](algorithms/sort/comb_sort.py) - [counting_sort：计数排序](algorithms/sort/counting_sort.py) - [heap_sort：堆排序](algorithms/sort/heap_sort.py) diff --git a/README_GE.md b/README_GE.md index 8aba1d043..f4de311a1 100644 --- a/README_GE.md +++ b/README_GE.md @@ -230,6 +230,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort](algorithms/sort/bubble_sort.py) - [bucket_sort](algorithms/sort/bucket_sort.py) + - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) - [heap_sort](algorithms/sort/heap_sort.py) diff --git a/README_JP.md b/README_JP.md index 8e18adcb1..1abcebe75 100644 --- a/README_JP.md +++ b/README_JP.md @@ -224,6 +224,7 @@ if __name__ == "__main__": - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort](algorithms/sort/bubble_sort.py) - [bucket_sort](algorithms/sort/bucket_sort.py) + - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) - [heap_sort](algorithms/sort/heap_sort.py) diff --git a/README_KR.md b/README_KR.md index 08d41dccb..796af776d 100644 --- a/README_KR.md +++ b/README_KR.md @@ -220,6 +220,7 @@ if __name__ == "__main__": - [sort : 정렬 알고리즘](algorithms/sort) - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort](algorithms/sort/bubble_sort.py) + - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) - [heap_sort](algorithms/sort/heap_sort.py) diff --git a/algorithms/sort/__init__.py b/algorithms/sort/__init__.py index c7e0de2cb..27468e8e2 100644 --- a/algorithms/sort/__init__.py +++ b/algorithms/sort/__init__.py @@ -11,3 +11,4 @@ from .bucket_sort import * from .shell_sort import * from .radix_sort import * +from .cocktail_shaker_sort import * diff --git a/algorithms/sort/cocktail_shaker_sort.py b/algorithms/sort/cocktail_shaker_sort.py new file mode 100644 index 000000000..973b824b6 --- /dev/null +++ b/algorithms/sort/cocktail_shaker_sort.py @@ -0,0 +1,30 @@ +def cocktail_shaker_sort(arr): + """ + Cocktail_shaker_sort + Sorting a given array + mutation of bubble sort + + reference: https://en.wikipedia.org/wiki/Cocktail_shaker_sort + + Worst-case performance: O(N^2) + """ + + def swap(i, j): + arr[i], arr[j] = arr[j], arr[i] + + n = len(arr) + swapped = True + while swapped: + swapped = False + for i in range(1, n): + if arr[i - 1] > arr[i]: + swap(i - 1, i) + swapped = True + if swapped == False: + return arr + swapped = False + for i in range(n-1,0,-1): + if arr[i - 1] > arr[i]: + swap(i - 1, i) + swapped = True + return arr diff --git a/tests/test_sort.py b/tests/test_sort.py index adbb8f119..ef8e75463 100644 --- a/tests/test_sort.py +++ b/tests/test_sort.py @@ -10,7 +10,8 @@ selection_sort, bucket_sort, shell_sort, - radix_sort + radix_sort, + cocktail_shaker_sort ) import unittest @@ -68,7 +69,10 @@ def test_shell_sort(self): def test_radix_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], radix_sort([1, 5, 65, 23, 57, 1232])) - + + def test_cocktail_shaker_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + cocktail_shaker_sort([1, 5, 65, 23, 57, 1232])) if __name__ == "__main__": From 537e4fb48557dd73a87e9cba88be30195b6a1e79 Mon Sep 17 00:00:00 2001 From: Keon Date: Wed, 6 Jun 2018 05:37:53 -0400 Subject: [PATCH 330/387] add to python package index (#320) --- README.md | 2 +- setup.py | 14 ++++++++++++-- 2 files changed, 13 insertions(+), 3 deletions(-) diff --git a/README.md b/README.md index bdfc343aa..173ed9f37 100644 --- a/README.md +++ b/README.md @@ -34,7 +34,7 @@ For running all tests write down: ## Install If you want to use the API algorithms in your code, it is as simple as: - $ pip3 install git+https://github.com/keon/algorithms + $ pip3 install algorithms You can test by creating a python file: (Ex: use `merge_sort` in `sort`) diff --git a/setup.py b/setup.py index 1bb71d3b6..65a80c638 100644 --- a/setup.py +++ b/setup.py @@ -3,16 +3,26 @@ import re from setuptools import find_packages, setup + +def long_description(): + with io.open('README.md', 'r', encoding='utf-8') as f: + readme = f.read() + return readme + + setup(name='algorithms', - version='1.1', + version='0.1.0', description='Pythonic Data Structures and Algorithms', + long_description=long_description(), url='https://github.com/keon/algorithms', - author='Keon Kim, Hai Hoang Dang, Rahul Goswami, Christian Bender, Saad', + author='Algorithms Team & Contributors', + author_email="kwk236@gmail.com", license='MIT', packages=find_packages(), classifiers=[ 'Programming Language :: Python :: 3', 'Programming Language :: Python :: 3.4', 'Programming Language :: Python :: 3.5', + 'Programming Language :: Python :: 3.6', ], zip_safe=False) From 36c1af414476804938b36c743b45bb750e5fbc16 Mon Sep 17 00:00:00 2001 From: Lee Geon Date: Wed, 6 Jun 2018 18:38:36 +0900 Subject: [PATCH 331/387] Created gnome sort in sort algorithm (#313) * Create gnome_sort.py * Update __init__.py * Update test_sort.py * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md * Update gnome_sort.py --- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 1 + algorithms/sort/__init__.py | 1 + algorithms/sort/gnome_sort.py | 19 +++++++++++++++++++ tests/test_sort.py | 9 +++++++-- 8 files changed, 32 insertions(+), 2 deletions(-) create mode 100644 algorithms/sort/gnome_sort.py diff --git a/README.md b/README.md index 173ed9f37..f31075f57 100644 --- a/README.md +++ b/README.md @@ -228,6 +228,7 @@ If you want to uninstall algorithms, it is as simple as: - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) + - [gnome_sort](algorithms/sort/gnome_sort.py) - [heap_sort](algorithms/sort/heap_sort.py) - [insertion_sort](algorithms/sort/insertion_sort.py) - [meeting_rooms](algorithms/sort/meeting_rooms.py) diff --git a/README_CN.md b/README_CN.md index 7f0abeaa6..4e938223e 100644 --- a/README_CN.md +++ b/README_CN.md @@ -212,6 +212,7 @@ pip3 uninstall -y algorithms - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort：梳排序](algorithms/sort/comb_sort.py) - [counting_sort：计数排序](algorithms/sort/counting_sort.py) + - [gnome_sort](algorithms/sort/gnome_sort.py) - [heap_sort：堆排序](algorithms/sort/heap_sort.py) - [insertion_sort：插入排序](algorithms/sort/insertion_sort.py) - [meeting_rooms：会议室](algorithms/sort/meeting_rooms.py) diff --git a/README_GE.md b/README_GE.md index f4de311a1..8bc1fd2a5 100644 --- a/README_GE.md +++ b/README_GE.md @@ -233,6 +233,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) + - [gnome_sort](algorithms/sort/gnome_sort.py) - [heap_sort](algorithms/sort/heap_sort.py) - [insertion_sort](algorithms/sort/insertion_sort.py) - [meeting_rooms](algorithms/sort/meeting_rooms.py) diff --git a/README_JP.md b/README_JP.md index 1abcebe75..0e63b9c09 100644 --- a/README_JP.md +++ b/README_JP.md @@ -227,6 +227,7 @@ if __name__ == "__main__": - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) + - [gnome_sort](algorithms/sort/gnome_sort.py) - [heap_sort](algorithms/sort/heap_sort.py) - [insertion_sort](algorithms/sort/insertion_sort.py) - [meeting_rooms](algorithms/sort/meeting_rooms.py) diff --git a/README_KR.md b/README_KR.md index 796af776d..fde2147b7 100644 --- a/README_KR.md +++ b/README_KR.md @@ -223,6 +223,7 @@ if __name__ == "__main__": - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) + - [gnome_sort](algorithms/sort/gnome_sort.py) - [heap_sort](algorithms/sort/heap_sort.py) - [insertion_sort](algorithms/sort/insertion_sort.py) - [meeting_rooms](algorithms/sort/meeting_rooms.py) diff --git a/algorithms/sort/__init__.py b/algorithms/sort/__init__.py index 27468e8e2..a2c6d3c6f 100644 --- a/algorithms/sort/__init__.py +++ b/algorithms/sort/__init__.py @@ -11,4 +11,5 @@ from .bucket_sort import * from .shell_sort import * from .radix_sort import * +from .gnome_sort import * from .cocktail_shaker_sort import * diff --git a/algorithms/sort/gnome_sort.py b/algorithms/sort/gnome_sort.py new file mode 100644 index 000000000..aaf38a278 --- /dev/null +++ b/algorithms/sort/gnome_sort.py @@ -0,0 +1,19 @@ +""" + +Gnome Sort +Best case performance is O(n) +Worst case performance is O(n^2) + +""" + + +def gnome_sort(arr): + n = len(arr) + index = 0 + while index < n: + if index == 0 or arr[index] >= arr[index-1]: + index = index + 1 + else: + arr[index], arr[index-1] = arr[index-1], arr[index] + index = index - 1 + return arr diff --git a/tests/test_sort.py b/tests/test_sort.py index ef8e75463..020b9a343 100644 --- a/tests/test_sort.py +++ b/tests/test_sort.py @@ -11,7 +11,8 @@ bucket_sort, shell_sort, radix_sort, - cocktail_shaker_sort + gnome_sort, + cocktail_shaker_sort, ) import unittest @@ -69,7 +70,11 @@ def test_shell_sort(self): def test_radix_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], radix_sort([1, 5, 65, 23, 57, 1232])) - + + def test_gnome_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + gnome_sort([1, 5, 65, 23, 57, 1232])) + def test_cocktail_shaker_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], cocktail_shaker_sort([1, 5, 65, 23, 57, 1232])) From f6aa8d6a47f145bfb7a1b5b1bac38ee859238455 Mon Sep 17 00:00:00 2001 From: Keon Date: Wed, 6 Jun 2018 06:12:10 -0400 Subject: [PATCH 332/387] clean up backtrack and move tests to test_backtest (#306) * clean up backtrack and add tests * fix typos in backtrack --- algorithms/backtrack/__init__.py | 15 ++ algorithms/backtrack/add_operators.py | 45 +++++ algorithms/backtrack/anagram.py | 49 ----- .../backtrack/array_sum_combinations.py | 142 +++++++-------- algorithms/backtrack/combination_sum.py | 24 +-- .../backtrack/expression_add_operators.py | 54 ------ algorithms/backtrack/factor_combinations.py | 5 +- algorithms/backtrack/find_words.py | 73 ++++++++ algorithms/backtrack/general_solution.md | 156 ---------------- .../backtrack/generate_abbreviations.py | 30 ++-- algorithms/backtrack/generate_parenthesis.py | 25 ++- algorithms/backtrack/letter_combination.py | 7 +- .../backtrack/palindrome_partitioning.py | 28 ++- algorithms/backtrack/pattern_match.py | 44 ++--- algorithms/backtrack/permute.py | 90 ++++++---- algorithms/backtrack/permute_unique.py | 27 +-- algorithms/backtrack/subsets.py | 79 ++++---- algorithms/backtrack/subsets_unique.py | 56 +++--- algorithms/backtrack/word_search.py | 111 ------------ tests/test_backtrack.py | 170 ++++++++++++++++++ 20 files changed, 585 insertions(+), 645 deletions(-) create mode 100644 algorithms/backtrack/__init__.py create mode 100644 algorithms/backtrack/add_operators.py delete mode 100644 algorithms/backtrack/expression_add_operators.py create mode 100644 algorithms/backtrack/find_words.py delete mode 100644 algorithms/backtrack/general_solution.md delete mode 100644 algorithms/backtrack/word_search.py create mode 100644 tests/test_backtrack.py diff --git a/algorithms/backtrack/__init__.py b/algorithms/backtrack/__init__.py new file mode 100644 index 000000000..f8cdab753 --- /dev/null +++ b/algorithms/backtrack/__init__.py @@ -0,0 +1,15 @@ +from .add_operators import * +from .anagram import * +from .array_sum_combinations import * +from .combination_sum import * +from .factor_combinations import * +from .find_words import * +from .generate_abbreviations import * +from .generate_parenthesis import * +from .letter_combination import * +from .palindrome_partitioning import * +from .pattern_match import * +from .permute_unique import * +from .permute import * +from .subsets_unique import * +from .subsets import * diff --git a/algorithms/backtrack/add_operators.py b/algorithms/backtrack/add_operators.py new file mode 100644 index 000000000..7a847396c --- /dev/null +++ b/algorithms/backtrack/add_operators.py @@ -0,0 +1,45 @@ +""" +Given a string that contains only digits 0-9 and a target value, +return all possibilities to add binary operators (not unary) +, -, or * +between the digits so they prevuate to the target value. + +Examples: +"123", 6 -> ["1+2+3", "1*2*3"] +"232", 8 -> ["2*3+2", "2+3*2"] +"105", 5 -> ["1*0+5","10-5"] +"00", 0 -> ["0+0", "0-0", "0*0"] +"3456237490", 9191 -> [] +""" + + +def add_operators(num, target): + """ + :type num: str + :type target: int + :rtype: List[str] + """ + + def dfs(res, path, num, target, pos, prev, multed): + if pos == len(num): + if target == prev: + res.append(path) + return + for i in range(pos, len(num)): + if i != pos and num[pos] == '0': # all digits have to be used + break + cur = int(num[pos:i+1]) + if pos == 0: + dfs(res, path + str(cur), num, target, i+1, cur, cur) + else: + dfs(res, path + "+" + str(cur), num, target, + i+1, prev + cur, cur) + dfs(res, path + "-" + str(cur), num, target, + i+1, prev - cur, -cur) + dfs(res, path + "*" + str(cur), num, target, + i+1, prev - multed + multed * cur, multed * cur) + + res = [] + if not num: + return res + dfs(res, "", num, target, 0, 0, 0) + return res diff --git a/algorithms/backtrack/anagram.py b/algorithms/backtrack/anagram.py index 862140fc1..7c807cdbd 100644 --- a/algorithms/backtrack/anagram.py +++ b/algorithms/backtrack/anagram.py @@ -1,31 +1,3 @@ -import unittest - -def all_perms_iter(elements): - """ - iterator: returns a perumation by each call. - """ - if len(elements) <=1: - yield elements - else: - for perm in all_perms_iter(elements[1:]): - for i in range(len(elements)): - yield perm[:i] + elements[0:1] + perm[i:] - - -def all_perms(elements): - """ - returns a list with the permuations. - """ - if len(elements) <=1: - return elements - else: - tmp = [] - for perm in all_perms(elements[1:]): - for i in range(len(elements)): - tmp.append(perm[:i] + elements[0:1] + perm[i:]) - return tmp - - def anagram(s1, s2): c1 = [0] * 26 c2 = [0] * 26 @@ -39,24 +11,3 @@ def anagram(s1, s2): c2[pos] = c2[pos] + 1 return c1 == c2 - - -class TestSuite (unittest.TestCase): - - def test_all_perms(self): - perms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba'] - self.assertEqual(perms, all_perms("abc")) - - def test_all_perms_iter(self): - it = all_perms_iter("abc") - perms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba'] - for i in range(len(perms)): - self.assertEqual(perms[i], next(it)) - - def test_angram(self): - self.assertTrue(anagram('apple', 'pleap')) - self.assertFalse(anagram("apple", "cherry")) - - -if __name__ == "__main__": - unittest.main() diff --git a/algorithms/backtrack/array_sum_combinations.py b/algorithms/backtrack/array_sum_combinations.py index b8dbc8046..b152e4d11 100644 --- a/algorithms/backtrack/array_sum_combinations.py +++ b/algorithms/backtrack/array_sum_combinations.py @@ -5,7 +5,7 @@ /* A = [1, 2, 3, 3] B = [2, 3, 3, 4] -C = [1, 2, 2, 2] +C = [2, 3, 3, 4] target = 7 */ @@ -16,79 +16,69 @@ import itertools from functools import partial -A = [1, 2, 3, 3] -B = [2, 3, 3, 4] -C = [1, 2, 2, 2] -target = 7 - - -def construct_candidates(constructed_sofar): - global A, B, C - array = A - if 1 == len(constructed_sofar): - array = B - elif 2 == len(constructed_sofar): - array = C - return array - - -def over(constructed_sofar): - global target - sum = 0 - to_stop, reached_target = False, False - for elem in constructed_sofar: - sum += elem - if sum >= target or len(constructed_sofar) >= 3: - to_stop = True - if sum == target and 3 == len(constructed_sofar): - reached_target = True - - return to_stop, reached_target - - -def backtrack(constructed_sofar): - to_stop, reached_target = over(constructed_sofar) - if to_stop: - if reached_target: - print(constructed_sofar) - return - candidates = construct_candidates(constructed_sofar) - for candidate in candidates: - constructed_sofar.append(candidate) - backtrack(constructed_sofar[:]) - constructed_sofar.pop() - - -backtrack([]) - - -# Complexity: O(n(m+p)) - -# 1. Sort all the arrays - a,b,c. - This will improve average time complexity. -# 2. If c[i] < Sum, then look for Sum - c[i] in array a and b. When pair found, -# insert c[i], a[j] & b[k] into the result list. This can be done in O(n). -# 3. Keep on doing the above procedure while going through complete c array. - - -A = [1, 2, 3, 3] -B = [2, 3, 3, 4] -C = [1, 2, 2, 2] -S = 7 - - -def check_sum(n, *nums): - if sum(x for x in nums) == n: - return (True, nums) - else: - return (False, nums) - - -pro = itertools.product(A, B, C) -func = partial(check_sum, S) -sums = list(itertools.starmap(func, pro)) -res = set() -for s in sums: - if s[0] is True and s[1] not in res: - res.add(s[1]) -print(res) +def array_sum_combinations(A, B, C, target): + + def over(constructed_sofar): + sum = 0 + to_stop, reached_target = False, False + for elem in constructed_sofar: + sum += elem + if sum >= target or len(constructed_sofar) >= 3: + to_stop = True + if sum == target and 3 == len(constructed_sofar): + reached_target = True + return to_stop, reached_target + + def construct_candidates(constructed_sofar): + array = A + if 1 == len(constructed_sofar): + array = B + elif 2 == len(constructed_sofar): + array = C + return array + + def backtrack(constructed_sofar=[], res=[]): + to_stop, reached_target = over(constructed_sofar) + if to_stop: + if reached_target: + res.append(constructed_sofar) + return + candidates = construct_candidates(constructed_sofar) + + for candidate in candidates: + constructed_sofar.append(candidate) + backtrack(constructed_sofar[:], res) + constructed_sofar.pop() + + res = [] + backtrack([], res) + return res + + +def unique_array_sum_combinations(A, B, C, target): + """ + 1. Sort all the arrays - a,b,c. - This improves average time complexity. + 2. If c[i] < Sum, then look for Sum - c[i] in array a and b. + When pair found, insert c[i], a[j] & b[k] into the result list. + This can be done in O(n). + 3. Keep on doing the above procedure while going through complete c array. + + Complexity: O(n(m+p)) + """ + def check_sum(n, *nums): + if sum(x for x in nums) == n: + return (True, nums) + else: + return (False, nums) + + pro = itertools.product(A, B, C) + func = partial(check_sum, target) + sums = list(itertools.starmap(func, pro)) + + res = set() + for s in sums: + if s[0] is True and s[1] not in res: + res.add(s[1]) + + return list(res) diff --git a/algorithms/backtrack/combination_sum.py b/algorithms/backtrack/combination_sum.py index 8c6747681..4d4dfb176 100644 --- a/algorithms/backtrack/combination_sum.py +++ b/algorithms/backtrack/combination_sum.py @@ -16,18 +16,18 @@ """ -def combination_sum(self, candidates, target): +def combination_sum(candidates, target): + + def dfs(nums, target, index, path, res): + if target < 0: + return # backtracking + if target == 0: + res.append(path) + return + for i in range(index, len(nums)): + dfs(nums, target-nums[i], i, path+[nums[i]], res) + res = [] candidates.sort() - self.dfs(candidates, target, 0, [], res) + dfs(candidates, target, 0, [], res) return res - - -def dfs(self, nums, target, index, path, res): - if target < 0: - return # backtracking - if target == 0: - res.append(path) - return - for i in range(index, len(nums)): - self.dfs(nums, target-nums[i], i, path+[nums[i]], res) diff --git a/algorithms/backtrack/expression_add_operators.py b/algorithms/backtrack/expression_add_operators.py deleted file mode 100644 index f8f520f9c..000000000 --- a/algorithms/backtrack/expression_add_operators.py +++ /dev/null @@ -1,54 +0,0 @@ -""" -Given a string that contains only digits 0-9 and a target value, -return all possibilities to add binary operators (not unary) +, -, or * -between the digits so they prevuate to the target value. - -Examples: -"123", 6 -> ["1+2+3", "1*2*3"] -"232", 8 -> ["2*3+2", "2+3*2"] -"105", 5 -> ["1*0+5","10-5"] -"00", 0 -> ["0+0", "0-0", "0*0"] -"3456237490", 9191 -> [] -""" - -def add_operator(num, target): - """ - :type num: str - :type target: int - :rtype: List[str] - """ - res = [] - if not num: return res - helper(res, "", num, target, 0, 0, 0) - return res - - -def helper(res, path, num, target, pos, prev, multed): - if pos == len(num): - if target == prev: - res.append(path) - return - for i in range(pos, len(num)): - if i != pos and num[pos] == '0': # all digits have to be used - break - cur = int(num[pos:i+1]) - if pos == 0: - helper(res, path + str(cur), num, target, i+1, cur, cur) - else: - helper(res, path + "+" + str(cur), num, target, i+1, prev + cur, cur) - helper(res, path + "-" + str(cur), num, target, i+1, prev - cur, -cur) - helper(res, path + "*" + str(cur), num, target, i+1, prev - multed + multed * cur, multed * cur) - - -# "123", 6 -> ["1+2+3", "1*2*3"] -s = "123" -target = 6 -print(add_operator(s, target)) -# "232", 8 -> ["2*3+2", "2+3*2"] -s = "232" -target = 8 -print(add_operator(s, target)) - -s = "123045" -target = 3 -print(add_operator(s, target)) diff --git a/algorithms/backtrack/factor_combinations.py b/algorithms/backtrack/factor_combinations.py index d4de7288f..3240b05a8 100644 --- a/algorithms/backtrack/factor_combinations.py +++ b/algorithms/backtrack/factor_combinations.py @@ -3,7 +3,8 @@ 8 = 2 x 2 x 2; = 2 x 4. -Write a function that takes an integer n and return all possible combinations of its factors. +Write a function that takes an integer n +and return all possible combinations of its factors. Note: You may assume that n is always positive. @@ -49,7 +50,7 @@ def get_factors(n): # Recursive: -def get_factors_recur(n): +def recursive_get_factors(n): def factor(n, i, combi, combis): while i * i <= n: diff --git a/algorithms/backtrack/find_words.py b/algorithms/backtrack/find_words.py new file mode 100644 index 000000000..da6b6347a --- /dev/null +++ b/algorithms/backtrack/find_words.py @@ -0,0 +1,73 @@ +''' +Given a matrix of words and a list of words to search, +return a list of words that exists in the board +This is Word Search II on LeetCode + +board = [ + ['o','a','a','n'], + ['e','t','a','e'], + ['i','h','k','r'], + ['i','f','l','v'] + ] + +words = ["oath","pea","eat","rain"] +''' + + +def find_words(board, words): + + def backtrack(board, i, j, trie, pre, used, result): + ''' + backtrack tries to build each words from + the board and return all words found + + @param: board, the passed in board of characters + @param: i, the row index + @param: j, the column index + @param: trie, a trie of the passed in words + @param: pre, a buffer of currently build string that differs + by recursion stack + @param: used, a replica of the board except in booleans + to state whether a character has been used + @param: result, the resulting set that contains all words found + + @return: list of words found + ''' + + if '#' in trie: + result.add(pre) + + if i < 0 or i >= len(board) or j < 0 or j >= len(board[0]): + return + + if not used[i][j] and board[i][j] in trie: + used[i][j] = True + backtrack(board, i+1, j, trie[board[i][j]], + pre+board[i][j], used, result) + backtrack(board, i, j+1, trie[board[i][j]], + pre+board[i][j], used, result) + backtrack(board, i-1, j, trie[board[i][j]], + pre+board[i][j], used, result) + backtrack(board, i, j-1, trie[board[i][j]], + pre+board[i][j], used, result) + used[i][j] = False + + # make a trie structure that is essentially dictionaries of dictionaries + # that map each character to a potential next character + trie = {} + for word in words: + curr_trie = trie + for char in word: + if char not in curr_trie: + curr_trie[char] = {} + curr_trie = curr_trie[char] + curr_trie['#'] = '#' + + # result is a set of found words since we do not want repeats + result = set() + used = [[False]*len(board[0]) for _ in range(len(board))] + + for i in range(len(board)): + for j in range(len(board[0])): + backtrack(board, i, j, trie, '', used, result) + return list(result) diff --git a/algorithms/backtrack/general_solution.md b/algorithms/backtrack/general_solution.md deleted file mode 100644 index 0c0ee0c6f..000000000 --- a/algorithms/backtrack/general_solution.md +++ /dev/null @@ -1,156 +0,0 @@ -This structure might apply to many other backtracking questions, but here I am just going to demonstrate Subsets, Permutations, and Combination Sum. - -# Subsets : https://leetcode.com/problems/subsets/ - -public List> subsets(int[] nums) { - List> list = new ArrayList<>(); - Arrays.sort(nums); - backtrack(list, new ArrayList<>(), nums, 0); - return list; -} - -private void backtrack(List> list , List tempList, int [] nums, int start){ - list.add(new ArrayList<>(tempList)); - for(int i = start; i < nums.length; i++){ - tempList.add(nums[i]); - backtrack(list, tempList, nums, i + 1); - tempList.remove(tempList.size() - 1); - } -} - -# Subsets II (contains duplicates) : https://leetcode.com/problems/subsets-ii/ - -public List> subsetsWithDup(int[] nums) { - List> list = new ArrayList<>(); - Arrays.sort(nums); - backtrack(list, new ArrayList<>(), nums, 0); - return list; -} - -private void backtrack(List> list, List tempList, int [] nums, int start){ - list.add(new ArrayList<>(tempList)); - for(int i = start; i < nums.length; i++){ - if(i > start && nums[i] == nums[i-1]) continue; // skip duplicates - tempList.add(nums[i]); - backtrack(list, tempList, nums, i + 1); - tempList.remove(tempList.size() - 1); - } -} - -# Permutations : https://leetcode.com/problems/permutations/ - -public List> permute(int[] nums) { - List> list = new ArrayList<>(); - // Arrays.sort(nums); // not necessary - backtrack(list, new ArrayList<>(), nums); - return list; -} - -private void backtrack(List> list, List tempList, int [] nums){ - if(tempList.size() == nums.length){ - list.add(new ArrayList<>(tempList)); - } else{ - for(int i = 0; i < nums.length; i++){ - if(tempList.contains(nums[i])) continue; // element already exists, skip - tempList.add(nums[i]); - backtrack(list, tempList, nums); - tempList.remove(tempList.size() - 1); - } - } -} - -# Permutations II (contains duplicates) : https://leetcode.com/problems/permutations-ii/ - -public List> permuteUnique(int[] nums) { - List> list = new ArrayList<>(); - Arrays.sort(nums); - backtrack(list, new ArrayList<>(), nums, new boolean[nums.length]); - return list; -} - -private void backtrack(List> list, List tempList, int [] nums, boolean [] used){ - if(tempList.size() == nums.length){ - list.add(new ArrayList<>(tempList)); - } else{ - for(int i = 0; i < nums.length; i++){ - if(used[i] || i > 0 && nums[i] == nums[i-1] && !used[i - 1]) continue; - used[i] = true; - tempList.add(nums[i]); - backtrack(list, tempList, nums, used); - used[i] = false; - tempList.remove(tempList.size() - 1); - } - } -} - -# Combination Sum : https://leetcode.com/problems/combination-sum/ - -public List> combinationSum(int[] nums, int target) { - List> list = new ArrayList<>(); - Arrays.sort(nums); - backtrack(list, new ArrayList<>(), nums, target, 0); - return list; -} - -private void backtrack(List> list, List tempList, int [] nums, int remain, int start){ - if(remain < 0) return; - else if(remain == 0) list.add(new ArrayList<>(tempList)); - else{ - for(int i = start; i < nums.length; i++){ - tempList.add(nums[i]); - backtrack(list, tempList, nums, remain - nums[i], i); // not i + 1 because we can reuse same elements - tempList.remove(tempList.size() - 1); - } - } -} -# Combination Sum II (can't reuse same element) : https://leetcode.com/problems/combination-sum-ii/ - -public List> combinationSum2(int[] nums, int target) { - List> list = new ArrayList<>(); - Arrays.sort(nums); - backtrack(list, new ArrayList<>(), nums, target, 0); - return list; - -} - -private void backtrack(List> list, List tempList, int [] nums, int remain, int start){ - if(remain < 0) return; - else if(remain == 0) list.add(new ArrayList<>(tempList)); - else{ - for(int i = start; i < nums.length; i++){ - if(i > start && nums[i] == nums[i-1]) continue; // skip duplicates - tempList.add(nums[i]); - backtrack(list, tempList, nums, remain - nums[i], i + 1); - tempList.remove(tempList.size() - 1); - } - } -} - - -# Palindrome Partitioning : https://leetcode.com/problems/palindrome-partitioning/ - -public List> partition(String s) { - List> list = new ArrayList<>(); - backtrack(list, new ArrayList<>(), s, 0); - return list; -} - -public void backtrack(List> list, List tempList, String s, int start){ - if(start == s.length()) - list.add(new ArrayList<>(tempList)); - else{ - for(int i = start; i < s.length(); i++){ - if(isPalindrome(s, start, i)){ - tempList.add(s.substring(start, i + 1)); - backtrack(list, tempList, s, i + 1); - tempList.remove(tempList.size() - 1); - } - } - } -} - -public boolean isPalindrome(String s, int low, int high){ - while(low < high) - if(s.charAt(low++) != s.charAt(high--)) return false; - return true; -} diff --git a/algorithms/backtrack/generate_abbreviations.py b/algorithms/backtrack/generate_abbreviations.py index 929c33994..132965687 100644 --- a/algorithms/backtrack/generate_abbreviations.py +++ b/algorithms/backtrack/generate_abbreviations.py @@ -6,21 +6,21 @@ def generate_abbreviations(word): - result = [] - backtrack(result, word, 0, 0, "") - return result + def backtrack(result, word, pos, count, cur): + if pos == len(word): + if count > 0: + cur += str(count) + result.append(cur) + return -def backtrack(result, word, pos, count, cur): - if pos == len(word): - if count > 0: - cur += str(count) - result.append(cur) - return + if count > 0: # add the current word + backtrack(result, word, pos+1, 0, cur+str(count)+word[pos]) + else: + backtrack(result, word, pos+1, 0, cur+word[pos]) + # skip the current word + backtrack(result, word, pos+1, count+1, cur) - if count > 0: # add the current word - backtrack(result, word, pos+1, 0, cur+str(count)+word[pos]) - else: - backtrack(result, word, pos+1, 0, cur+word[pos]) - # skip the current word - backtrack(result, word, pos+1, count+1, cur) + result = [] + backtrack(result, word, 0, 0, "") + return result diff --git a/algorithms/backtrack/generate_parenthesis.py b/algorithms/backtrack/generate_parenthesis.py index 6dac22c94..9b9eb8cf1 100644 --- a/algorithms/backtrack/generate_parenthesis.py +++ b/algorithms/backtrack/generate_parenthesis.py @@ -13,20 +13,17 @@ ] """ -def gen_parenthesis(n:"int")->"List[str]": + +def generate_parenthesis(n): + def add_pair(res, s, left, right): + if left == 0 and right == 0: + res.append(s) + return + if right > 0: + add_pair(res, s+")", left, right-1) + if left > 0: + add_pair(res, s+"(", left-1, right+1) + res = [] add_pair(res, "", n, 0) return res - -def add_pair(res, s, left, right): - if left == 0 and right == 0: - res.append(s) - return - if right > 0: - add_pair(res, s+")", left, right-1) - if left > 0: - add_pair(res, s+"(", left-1, right+1) - - -if __name__=="__main__": - print(gen_parenthesis(3)) diff --git a/algorithms/backtrack/letter_combination.py b/algorithms/backtrack/letter_combination.py index f4a4c4e0b..8a2f8d151 100644 --- a/algorithms/backtrack/letter_combination.py +++ b/algorithms/backtrack/letter_combination.py @@ -7,7 +7,7 @@ """ -def letter_combinations(digits:"str")->"List[str]": +def letter_combinations(digits): if digits == "": return [] kmaps = { @@ -28,8 +28,3 @@ def letter_combinations(digits:"str")->"List[str]": tmp.append(an + char) ans = tmp return ans - - -if __name__ == "__main__": - digit_string = "23" - print(letter_combinations(digit_string)) diff --git a/algorithms/backtrack/palindrome_partitioning.py b/algorithms/backtrack/palindrome_partitioning.py index 21500c180..052339dcc 100644 --- a/algorithms/backtrack/palindrome_partitioning.py +++ b/algorithms/backtrack/palindrome_partitioning.py @@ -1,8 +1,11 @@ """ It looks like you need to be looking not for all palindromic substrings, -but rather for all the ways you can divide the input string up into palindromic substrings. -(There's always at least one way, since one-character substrings are always palindromes.) +but rather for all the ways you can divide the input string +up into palindromic substrings. +(There's always at least one way, +since one-character substrings are always palindromes.) """ + def palindromic_substrings(s): if not s: return [[]] @@ -14,19 +17,26 @@ def palindromic_substrings(s): results.append([sub] + rest) return results -""" There's two loops. -The outer loop checks each length of initial substring (in descending length order) to see -if it is a palindrome. If so, it recurses on the rest of the string and loops over the returned -values, adding the initial substring to each item before adding it to the results. + +""" +There's two loops. +The outer loop checks each length of initial substring +(in descending length order) to see if it is a palindrome. +If so, it recurses on the rest of the string and loops over the returned +values, adding the initial substring to +each item before adding it to the results. """ -# A slightly more Pythonic approach would be to make a recursive generator: -def palindromic_substrings(s): + +def palindromic_substrings_iter(s): + """ + A slightly more Pythonic approach with a recursive generator + """ if not s: yield [] return for i in range(len(s), 0, -1): sub = s[:i] if sub == sub[::-1]: - for rest in palindromic_substrings(s[i:]): + for rest in palindromic_substrings_iter(s[i:]): yield [sub] + rest diff --git a/algorithms/backtrack/pattern_match.py b/algorithms/backtrack/pattern_match.py index 532dfb9c2..03a23a4e9 100644 --- a/algorithms/backtrack/pattern_match.py +++ b/algorithms/backtrack/pattern_match.py @@ -20,33 +20,23 @@ def pattern_match(pattern, string): :type string: str :rtype: bool """ - return backtrack(pattern, string, {}) + def backtrack(pattern, string, dic): + + if len(pattern) == 0 and len(string) > 0: + return False + if len(pattern) == len(string) == 0: + return True -def backtrack(pattern, string, dic): - print(dic) - if len(pattern) == 0 and len(string) > 0: + for end in range(1, len(string)-len(pattern)+2): + if pattern[0] not in dic and string[:end] not in dic.values(): + dic[pattern[0]] = string[:end] + if backtrack(pattern[1:], string[end:], dic): + return True + del dic[pattern[0]] + elif pattern[0] in dic and dic[pattern[0]] == string[:end]: + if backtrack(pattern[1:], string[end:], dic): + return True return False - if len(pattern) == len(string) == 0: - return True - for end in range(1, len(string)-len(pattern)+2): - if pattern[0] not in dic and string[:end] not in dic.values(): - dic[pattern[0]] = string[:end] - if backtrack(pattern[1:], string[end:], dic): - return True - del dic[pattern[0]] - elif pattern[0] in dic and dic[pattern[0]] == string[:end]: - if backtrack(pattern[1:], string[end:], dic): - return True - return False - -if __name__ == "__main__": - pattern1 = "abab" - string1 = "redblueredblue" - pattern2 = "aaaa" - string2 = "asdasdasdasd" - pattern3 = "aabb" - string3 = "xyzabcxzyabc" - print(pattern_match(pattern1, string1)) - print(pattern_match(pattern2, string2)) - print(pattern_match(pattern3, string3)) + + return backtrack(pattern, string, {}) diff --git a/algorithms/backtrack/permute.py b/algorithms/backtrack/permute.py index 397597230..4ce484369 100644 --- a/algorithms/backtrack/permute.py +++ b/algorithms/backtrack/permute.py @@ -1,40 +1,54 @@ -# Given a collection of distinct numbers, return all possible permutations. - -# For example, -# [1,2,3] have the following permutations: -# [ - # [1,2,3], - # [1,3,2], - # [2,1,3], - # [2,3,1], - # [3,1,2], - # [3,2,1] -# ] - -def permute(nums): - perms = [[]] - for n in nums: - new_perms = [] - for perm in perms: - for i in range(len(perm)+1): - new_perms.append(perm[:i] + [n] + perm[i:]) ###insert n - print(i, perm[:i], [n], perm[i:], ">>>>", new_perms) - perms = new_perms - return perms +""" +Given a collection of distinct numbers, return all possible permutations. + +For example, +[1,2,3] have the following permutations: +[ + [1,2,3], + [1,3,2], + [2,1,3], + [2,3,1], + [3,1,2], + [3,2,1] +] +""" + + +def permute(elements): + """ + returns a list with the permuations. + """ + if len(elements) <= 1: + return elements + else: + tmp = [] + for perm in permute(elements[1:]): + for i in range(len(elements)): + tmp.append(perm[:i] + elements[0:1] + perm[i:]) + return tmp + + +def permute_iter(elements): + """ + iterator: returns a perumation by each call. + """ + if len(elements) <= 1: + yield elements + else: + for perm in permute_iter(elements[1:]): + for i in range(len(elements)): + yield perm[:i] + elements[0:1] + perm[i:] + # DFS Version -# def permute(nums): - # res = [] - # dfs(res, nums, []) - # return res - -# def dfs(res, nums, path): - # if not nums: - # res.append(path) - # for i in range(len(nums)): - # print(nums[:i]+nums[i+1:]) - # dfs(res, nums[:i]+nums[i+1:], path+[nums[i]]) - -test = [1,2,3] -print(test) -print(permute(test)) +def permute_recursive(nums): + def dfs(res, nums, path): + if not nums: + res.append(path) + for i in range(len(nums)): + print(nums[:i]+nums[i+1:]) + dfs(res, nums[:i]+nums[i+1:], path+[nums[i]]) + + res = [] + dfs(res, nums, []) + return res diff --git a/algorithms/backtrack/permute_unique.py b/algorithms/backtrack/permute_unique.py index 911d40c76..3b82e2c46 100644 --- a/algorithms/backtrack/permute_unique.py +++ b/algorithms/backtrack/permute_unique.py @@ -1,13 +1,16 @@ -# Given a collection of numbers that might contain duplicates, -# return all possible unique permutations. +""" +Given a collection of numbers that might contain duplicates, +return all possible unique permutations. + +For example, +[1,1,2] have the following unique permutations: +[ + [1,1,2], + [1,2,1], + [2,1,1] +] +""" -# For example, -# [1,1,2] have the following unique permutations: -# [ - # [1,1,2], - # [1,2,1], - # [2,1,1] -# ] def permute_unique(nums): perms = [[]] @@ -16,9 +19,7 @@ def permute_unique(nums): for l in perms: for i in range(len(l)+1): new_perms.append(l[:i]+[n]+l[i:]) - if i= len(nums): - # res.append(cur) - # else: - # backtrack(res, nums, cur+[nums[pos]], pos+1) - # backtrack(res, nums, cur, pos+1) +def backtrack(res, nums, cur, pos): + if pos >= len(nums): + res.append(cur) + else: + backtrack(res, nums, cur+[nums[pos]], pos+1) + backtrack(res, nums, cur, pos+1) +""" # Iteratively -def subsets2(self, nums): +def subsets_v2(self, nums): res = [[]] for num in sorted(nums): res += [item+[num] for item in res] return res -test = [1,2,3] + +test = [1, 2, 3] print(test) print(subsets(test)) diff --git a/algorithms/backtrack/subsets_unique.py b/algorithms/backtrack/subsets_unique.py index fac0cb0c2..a99f25c35 100644 --- a/algorithms/backtrack/subsets_unique.py +++ b/algorithms/backtrack/subsets_unique.py @@ -1,38 +1,42 @@ -# Given a collection of integers that might contain duplicates, nums, -# return all possible subsets. +""" +Given a collection of integers that might contain duplicates, nums, +return all possible subsets. -# Note: The solution set must not contain duplicate subsets. +Note: The solution set must not contain duplicate subsets. -# For example, -# If nums = [1,2,2], a solution is: +For example, +If nums = [1,2,2], a solution is: + +[ + [2], + [1], + [1,2,2], + [2,2], + [1,2], + [] +] +""" -# [ - # [2], - # [1], - # [1,2,2], - # [2,2], - # [1,2], - # [] -# ] def subsets_unique(nums): + + def backtrack(res, nums, stack, pos): + if pos == len(nums): + res.add(tuple(stack)) + else: + # take + stack.append(nums[pos]) + backtrack(res, nums, stack, pos+1) + stack.pop() + + # don't take + backtrack(res, nums, stack, pos+1) + res = set() backtrack(res, nums, [], 0) return list(res) -def backtrack(res, nums, stack, pos): - if pos == len(nums): - res.add(tuple(stack)) - else: - # take - stack.append(nums[pos]) - backtrack(res, nums, stack, pos+1) - stack.pop() - - # don't take - backtrack(res, nums, stack, pos+1) - -test = [1,2,2] +test = [1, 2, 2] print(test) print(subsets_unique(test)) diff --git a/algorithms/backtrack/word_search.py b/algorithms/backtrack/word_search.py deleted file mode 100644 index 989e5b29c..000000000 --- a/algorithms/backtrack/word_search.py +++ /dev/null @@ -1,111 +0,0 @@ -import unittest -''' -Given a matrix of words and a list of words to search, return a list of words that exists in the board -This is Word Search II on LeetCode - -board = [ - ['o','a','a','n'], - ['e','t','a','e'], - ['i','h','k','r'], - ['i','f','l','v'] - ] - -words = ["oath","pea","eat","rain"] - -''' - -def find_words(board, words): - # make a trie structure that is essentially dictionaries of dictionaries that map each character to a potential next character - trie = {} - for word in words: - curr_trie = trie - for char in word: - if char not in curr_trie: - curr_trie[char] = {} - curr_trie = curr_trie[char] - curr_trie['#'] = '#' - - # result is a set of found words since we do not want repeats - result = set() - used = [[False]*len(board[0]) for _ in range(len(board))] - - for i in range(len(board)): - for j in range(len(board[0])): - backtrack(board, i, j, trie, '', used, result) - return list(result) - -''' -backtrack tries to build each words from the board and return all words found -@param: board, the passed in board of characters -@param: i, the row index -@param: j, the column index -@param: trie, a trie of the passed in words -@param: pre, a buffer of currently build string that differs by recursion stack -@param: used, a replica of the board except in booleans to state whether a character has been used -@param: result, the resulting set that contains all words found - -@return: list of words found -''' - -def backtrack(board, i, j, trie, pre, used, result): - if '#' in trie: - result.add(pre) - - if i < 0 or i >= len(board) or j < 0 or j >= len(board[0]): - return - - if not used[i][j] and board[i][j] in trie: - used[i][j]=True - backtrack(board,i+1,j,trie[board[i][j]],pre+board[i][j], used, result) - backtrack(board,i,j+1,trie[board[i][j]],pre+board[i][j], used, result) - backtrack(board,i-1,j,trie[board[i][j]],pre+board[i][j], used, result) - backtrack(board,i,j-1,trie[board[i][j]],pre+board[i][j], used, result) - used[i][j]=False - -class MyTests(unittest.TestCase): - def test_normal(self): - board = [ - ['o','a','a','n'], - ['e','t','a','e'], - ['i','h','k','r'], - ['i','f','l','v'] - ] - - words = ["oath","pea","eat","rain"] - self.assertEqual(find_words(board, words), ['oath', 'eat']) - - def test_none(self): - board = [ - ['o','a','a','n'], - ['e','t','a','e'], - ['i','h','k','r'], - ['i','f','l','v'] - ] - - words = ["chicken", "nugget", "hello", "world"] - self.assertEqual(find_words(board, words), []) - - def test_empty(self): - board = [] - words = [] - self.assertEqual(find_words(board, words), []) - - def test_uneven(self): - board = [ - ['o','a','a','n'], - ['e','t','a','e'] - ] - words = ["oath","pea","eat","rain"] - self.assertEqual(find_words(board, words), ['eat']) - - def test_repeat(self): - board = [ - ['a','a','a'], - ['a','a','a'], - ['a','a','a'] - ] - words = ["a", "aa", "aaa", "aaaa", "aaaaa"] - self.assertTrue(len(find_words(board, words))==5) - -if __name__=="__main__": - unittest.main() diff --git a/tests/test_backtrack.py b/tests/test_backtrack.py new file mode 100644 index 000000000..2e01d596c --- /dev/null +++ b/tests/test_backtrack.py @@ -0,0 +1,170 @@ +from algorithms.backtrack import ( + add_operators, + permute, + permute_iter, + anagram, + array_sum_combinations, + unique_array_sum_combinations, + combination_sum, + find_words, + pattern_match, +) + +import unittest + + +class TestAddOperator(unittest.TestCase): + def test_add_operators(self): + # "123", 6 -> ["1+2+3", "1*2*3"] + s = "123" + target = 6 + self.assertEqual(add_operators(s, target), ["1+2+3", "1*2*3"]) + # "232", 8 -> ["2*3+2", "2+3*2"] + s = "232" + target = 8 + self.assertEqual(add_operators(s, target), ["2+3*2", "2*3+2"]) + + s = "123045" + target = 3 + answer = ['1+2+3*0*4*5', + '1+2+3*0*45', + '1+2-3*0*4*5', + '1+2-3*0*45', + '1-2+3+0-4+5', + '1-2+3-0-4+5', + '1*2+3*0-4+5', + '1*2-3*0-4+5', + '1*23+0-4*5', + '1*23-0-4*5', + '12+3*0-4-5', + '12-3*0-4-5'] + self.assertEqual(add_operators(s, target), answer) + + +class TestPermuteAndAnagram(unittest.TestCase): + + def test_permute(self): + perms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba'] + self.assertEqual(perms, permute("abc")) + + def test_permute_iter(self): + it = permute_iter("abc") + perms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba'] + for i in range(len(perms)): + self.assertEqual(perms[i], next(it)) + + def test_angram(self): + self.assertTrue(anagram('apple', 'pleap')) + self.assertFalse(anagram("apple", "cherry")) + + +class TestArrayCombinationSum(unittest.TestCase): + + def test_array_sum_combinations(self): + A = [1, 2, 3, 3] + B = [2, 3, 3, 4] + C = [2, 3, 3, 4] + target = 7 + answer = [[1, 2, 4], [1, 3, 3], [1, 3, 3], [1, 3, 3], + [1, 3, 3], [1, 4, 2], [2, 2, 3], [2, 2, 3], + [2, 3, 2], [2, 3, 2], [3, 2, 2], [3, 2, 2]] + self.assertEqual(array_sum_combinations(A, B, C, target), answer) + + def test_unique_array_sum_combinations(self): + A = [1, 2, 3, 3] + B = [2, 3, 3, 4] + C = [2, 3, 3, 4] + target = 7 + answer = [(2, 3, 2), (3, 2, 2), (1, 2, 4), + (1, 4, 2), (2, 2, 3), (1, 3, 3)] + self.assertEqual(unique_array_sum_combinations(A, B, C, target), answer) + + +class TestCombinationSum(unittest.TestCase): + + def check_sum(self, nums, target): + if sum(nums) == target: + return (True, nums) + else: + return (False, nums) + + def test_combination_sum(self): + candidates1 = [2, 3, 6, 7] + target1 = 7 + answer1 = [ + [2, 2, 3], + [7] + ] + self.assertEqual(combination_sum(candidates1, target1), answer1) + + candidates2 = [2, 3, 5] + target2 = 8 + answer2 = [ + [2, 2, 2, 2], + [2, 3, 3], + [3, 5] + ] + self.assertEqual(combination_sum(candidates2, target2), answer2) + + +class TestFindWords(unittest.TestCase): + + def test_normal(self): + board = [ + ['o', 'a', 'a', 'n'], + ['e', 't', 'a', 'e'], + ['i', 'h', 'k', 'r'], + ['i', 'f', 'l', 'v'] + ] + + words = ["oath", "pea", "eat", "rain"] + self.assertEqual(find_words(board, words).sort(), + ['oath', 'eat'].sort()) + + def test_none(self): + board = [ + ['o', 'a', 'a', 'n'], + ['e', 't', 'a', 'e'], + ['i', 'h', 'k', 'r'], + ['i', 'f', 'l', 'v'] + ] + + words = ["chicken", "nugget", "hello", "world"] + self.assertEqual(find_words(board, words), []) + + def test_empty(self): + board = [] + words = [] + self.assertEqual(find_words(board, words), []) + + def test_uneven(self): + board = [ + ['o', 'a', 'a', 'n'], + ['e', 't', 'a', 'e'] + ] + words = ["oath", "pea", "eat", "rain"] + self.assertEqual(find_words(board, words), ['eat']) + + def test_repeat(self): + board = [ + ['a', 'a', 'a'], + ['a', 'a', 'a'], + ['a', 'a', 'a'] + ] + words = ["a", "aa", "aaa", "aaaa", "aaaaa"] + self.assertTrue(len(find_words(board, words)) == 5) + + +class TestPatternMatch(unittest.TestCase): + + def test_pattern_match(self): + pattern1 = "abab" + string1 = "redblueredblue" + pattern2 = "aaaa" + string2 = "asdasdasdasd" + pattern3 = "aabb" + string3 = "xyzabcxzyabc" + + self.assertTrue(pattern_match(pattern1, string1)) + self.assertTrue(pattern_match(pattern2, string2)) + self.assertFalse(pattern_match(pattern3, string3)) From de286fda83051b981d2c8745086579b43d138887 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Wed, 6 Jun 2018 16:51:42 +0530 Subject: [PATCH 333/387] add type of desc. as markdown (#324) fixes #322 --- setup.py | 1 + 1 file changed, 1 insertion(+) diff --git a/setup.py b/setup.py index 65a80c638..f08f24f14 100644 --- a/setup.py +++ b/setup.py @@ -14,6 +14,7 @@ def long_description(): version='0.1.0', description='Pythonic Data Structures and Algorithms', long_description=long_description(), + long_description_content_type="text/markdown", url='https://github.com/keon/algorithms', author='Algorithms Team & Contributors', author_email="kwk236@gmail.com", From 69d4b7dc2988ce34b92772a04558aeaeefd63019 Mon Sep 17 00:00:00 2001 From: hsi1032 Date: Thu, 7 Jun 2018 15:31:01 +0900 Subject: [PATCH 334/387] Create bitonic_sort.py in /algorithms/sort/ and update test_sort, __init__ and all README files (#317) * Create bitonic_sort.py * Update __init__.py * Update test_sort.py * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md * Update bitonic_sort.py * Update bitonic_sort.py * Update bitonic_sort.py * Update test_sort.py * Update test_sort.py * Update bitonic_sort.py * Update bitonic_sort.py * Update bitonic_sort.py * Update bitonic_sort.py * Update bitonic_sort.py --- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 1 + algorithms/sort/__init__.py | 1 + algorithms/sort/bitonic_sort.py | 43 +++++++++++++++++++++++++++++++++ tests/test_sort.py | 9 +++++++ 8 files changed, 58 insertions(+) create mode 100644 algorithms/sort/bitonic_sort.py diff --git a/README.md b/README.md index f31075f57..69b550d4d 100644 --- a/README.md +++ b/README.md @@ -222,6 +222,7 @@ If you want to uninstall algorithms, it is as simple as: - [randomized_set](algorithms/set/randomized_set.py) - [set_covering](algorithms/set/set_covering.py) - [sort](algorithms/sort) + - [bitonic_sort](algorithms/sort/bitonic_sort.py) - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort](algorithms/sort/bubble_sort.py) - [bucket_sort](algorithms/sort/bucket_sort.py) diff --git a/README_CN.md b/README_CN.md index 4e938223e..260bed27b 100644 --- a/README_CN.md +++ b/README_CN.md @@ -206,6 +206,7 @@ pip3 uninstall -y algorithms - [randomized_set：随机集合](algorithms/set/randomized_set.py) - [set_covering：集合覆盖](algorithms/set/set_covering.py) - [sort：排序](algorithms/sort) + - [bitonic_sort](algorithms/sort/bitonic_sort.py) - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort：冒泡排序](algorithms/sort/bubble_sort.py) - [bucket_sort](algorithms/sort/bucket_sort.py) diff --git a/README_GE.md b/README_GE.md index 8bc1fd2a5..2ec4b7aa5 100644 --- a/README_GE.md +++ b/README_GE.md @@ -227,6 +227,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [randomized_set](algorithms/set/randomized_set.py) - [set_covering](algorithms/set/set_covering.py) - [sort](algorithms/sort) + - [bitonic_sort](algorithms/sort/bitonic_sort.py) - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort](algorithms/sort/bubble_sort.py) - [bucket_sort](algorithms/sort/bucket_sort.py) diff --git a/README_JP.md b/README_JP.md index 0e63b9c09..627955749 100644 --- a/README_JP.md +++ b/README_JP.md @@ -221,6 +221,7 @@ if __name__ == "__main__": - [randomized_set](algorithms/set/randomized_set.py) - [set_covering](algorithms/set/set_covering.py) - [sort : ソート](algorithms/sort) + - [bitonic_sort](algorithms/sort/bitonic_sort.py) - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort](algorithms/sort/bubble_sort.py) - [bucket_sort](algorithms/sort/bucket_sort.py) diff --git a/README_KR.md b/README_KR.md index fde2147b7..d46fa4774 100644 --- a/README_KR.md +++ b/README_KR.md @@ -218,6 +218,7 @@ if __name__ == "__main__": - [randomized_set](algorithms/set/randomized_set.py) - [set_covering](algorithms/set/set_covering.py) - [sort : 정렬 알고리즘](algorithms/sort) + - [bitonic_sort](algorithms/sort/bitonic_sort.py) - [bogo_sort](algorithms/sort/bogo_sort.py) - [bubble_sort](algorithms/sort/bubble_sort.py) - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) diff --git a/algorithms/sort/__init__.py b/algorithms/sort/__init__.py index a2c6d3c6f..a7dba9a16 100644 --- a/algorithms/sort/__init__.py +++ b/algorithms/sort/__init__.py @@ -1,3 +1,4 @@ +from .bitonic_sort import * from .bogo_sort import * from .bubble_sort import * from .comb_sort import * diff --git a/algorithms/sort/bitonic_sort.py b/algorithms/sort/bitonic_sort.py new file mode 100644 index 000000000..f8cad90e1 --- /dev/null +++ b/algorithms/sort/bitonic_sort.py @@ -0,0 +1,43 @@ +def bitonic_sort(arr, reverse=False): + """ + bitonic sort is sorting algorithm to use multiple process, but this code not containing parallel process + It can sort only array that sizes power of 2 + It can sort array in both increasing order and decreasing order by giving argument true(increasing) and false(decreasing) + + Worst-case in parallel: O(log(n)^2) + Worst-case in non-parallel: O(nlog(n)^2) + + reference: https://en.wikipedia.org/wiki/Bitonic_sorter + """ + def compare(arr, reverse): + n = len(arr)//2 + for i in range(n): + if reverse != (arr[i] > arr[i+n]): + arr[i], arr[i+n] = arr[i+n], arr[i] + return arr + + def bitonic_merge(arr, reverse): + n = len(arr) + + if n <= 1: + return arr + + arr = compare(arr, reverse) + left = bitonic_merge(arr[:n // 2], reverse) + right = bitonic_merge(arr[n // 2:], reverse) + return left + right + + #end of function(compare and bitionic_merge) definition + n = len(arr) + if n <= 1: + return arr + # checks if n is power of two + if not (n and (not(n & (n - 1))) ): + raise ValueError("the size of input should be power of two") + + left = bitonic_sort(arr[:n // 2], True) + right = bitonic_sort(arr[n // 2:], False) + + arr = bitonic_merge(left + right, reverse) + + return arr diff --git a/tests/test_sort.py b/tests/test_sort.py index 020b9a343..7d8ea8a9b 100644 --- a/tests/test_sort.py +++ b/tests/test_sort.py @@ -1,4 +1,5 @@ from algorithms.sort import ( + bitonic_sort, bogo_sort, bubble_sort, comb_sort, @@ -22,6 +23,14 @@ class TestSuite(unittest.TestCase): def test_bogo_sort(self): self.assertEqual([1, 5, 23], bogo_sort([1, 23, 5])) + + def test_bitonic_sort(self): + self.assertEqual([1, 2, 3, 5, 23, 57, 65, 1232], + bitonic_sort([1, 3, 2, 5, 65, 23, 57, 1232])) + self.assertEqual([1, 2, 3, 5, 23, 57, 65, 1232], + bitonic_sort([1, 3, 2, 5, 65, 23, 57, 1232],False)) + self.assertEqual([1232, 65, 57, 23, 5, 3, 2, 1], + bitonic_sort([1, 2, 3, 5, 65, 23, 57, 1232],True)) def test_bubble_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], From 41dbd32d78b8eca5063e0728354d8a605821ef1a Mon Sep 17 00:00:00 2001 From: Lee Geon Date: Thu, 7 Jun 2018 19:14:07 +0900 Subject: [PATCH 335/387] Added simulation in bubble sort (#327) * Update bubble_sort.py * Update bubble_sort.py * Update bubble_sort.py * Update bubble_sort.py --- algorithms/sort/bubble_sort.py | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/algorithms/sort/bubble_sort.py b/algorithms/sort/bubble_sort.py index 0a8a47063..63c6c4f14 100644 --- a/algorithms/sort/bubble_sort.py +++ b/algorithms/sort/bubble_sort.py @@ -4,19 +4,29 @@ Worst-case performance: O(N^2) +If you call bubble_sort(arr,True), you can see the process of the sort +Default is simulation = False + """ -def bubble_sort(arr): +def bubble_sort(arr, simulation=False): def swap(i, j): arr[i], arr[j] = arr[j], arr[i] n = len(arr) swapped = True + + if simulation: + print(arr) + while swapped: swapped = False for i in range(1, n): if arr[i - 1] > arr[i]: swap(i - 1, i) swapped = True + if simulation: + print(arr) + return arr From a93acad6f1a5c66f3f0938d9b6d0279cc1db1c72 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Thu, 7 Jun 2018 16:26:12 +0530 Subject: [PATCH 336/387] logo update in all READMEs (#329) * add logo in README_CN * Update README_GE.md * Update README_JP.md * Update README_KR.md --- README_CN.md | 2 ++ README_GE.md | 2 ++ README_JP.md | 2 ++ README_KR.md | 2 ++ 4 files changed, 8 insertions(+) diff --git a/README_CN.md b/README_CN.md index 260bed27b..0f5793e27 100644 --- a/README_CN.md +++ b/README_CN.md @@ -1,3 +1,5 @@ +

+ [English](README.md) | 简体中文 | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) diff --git a/README_GE.md b/README_GE.md index 2ec4b7aa5..dc493bc3a 100644 --- a/README_GE.md +++ b/README_GE.md @@ -1,3 +1,5 @@ +

+ [English](README.md) | [简体中文](README_CN.md) | Deutsch | [日本語](README_JP.md) | [한국어](README_KR.md) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) diff --git a/README_JP.md b/README_JP.md index 627955749..15d244c2f 100644 --- a/README_JP.md +++ b/README_JP.md @@ -1,3 +1,5 @@ +

+ [English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 日本語 | [한국어](README_KR.md) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) diff --git a/README_KR.md b/README_KR.md index d46fa4774..678798851 100644 --- a/README_KR.md +++ b/README_KR.md @@ -1,3 +1,5 @@ +

+ [English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 한국어 | [日本語](README_JP.md) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) From e5b9faca86889455b03b573b17802c648b75a5f7 Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Thu, 7 Jun 2018 04:48:33 -0700 Subject: [PATCH 337/387] WIP: Fix some issues in Travis and add more python env (#323) * Requirements.txt: Add requirements dependency for algorithms * Update cache in travis * Switch to use tox and add more env in python for testing * Add MANIFEST.in file * fix travis issue (#1) * Add TODO to PriorityQueue --- .travis.yml | 32 +++++++-------------- MANIFEST.in | 4 +++ requirements.txt | 6 ++++ tests/test_backtrack.py | 6 ++-- tests/test_queues.py | 8 ++++-- tox.ini | 64 +++++++++++++++++++++++++++++++++++++++++ 6 files changed, 94 insertions(+), 26 deletions(-) create mode 100644 MANIFEST.in create mode 100644 tox.ini diff --git a/.travis.yml b/.travis.yml index b3be12855..11468847b 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,20 +1,18 @@ group: travis_latest language: python -cache: pip -python: - - 3.6 - #- nightly - #- pypy3 +cache: + directories: + - $HOME/.cache/pip matrix: - allow_failures: - - python: nightly - - python: pypy3 + include: + - python: 3.4 + env: TOX_ENV=py34 + - python: 3.5 + env: TOX_ENV=py35,coverage + - python: 3.6 + env: TOX_ENV=py36 install: - pip install -r requirements.txt - - pip install flake8 # pytest # add another testing frameworks later - - pip install python-coveralls - - pip install coverage - - pip install nose before_script: # stop the build if there are Python syntax errors or undefined names - flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics @@ -23,17 +21,9 @@ before_script: script: # Check python install package - pip3 install -e . - # Check unittest running - - python3 -m unittest discover tests - # Check pytest running - - python3 -m pytest tests - # Run nose with coverage support - - nosetests --with-coverage + - tox -e $TOX_ENV # Check python uninstall package - pip3 uninstall -y algorithms notifications: on_success: change on_failure: change # `always` will be the setting once code changes slow down - -after_success: - - coveralls diff --git a/MANIFEST.in b/MANIFEST.in new file mode 100644 index 000000000..daf8a5200 --- /dev/null +++ b/MANIFEST.in @@ -0,0 +1,4 @@ +include README.md +include LICENSE +include algorithms/* +include tests/* diff --git a/requirements.txt b/requirements.txt index e69de29bb..7a3e47c8a 100644 --- a/requirements.txt +++ b/requirements.txt @@ -0,0 +1,6 @@ +flake8 +python-coveralls +coverage +nose +pytest +tox diff --git a/tests/test_backtrack.py b/tests/test_backtrack.py index 2e01d596c..dd290f759 100644 --- a/tests/test_backtrack.py +++ b/tests/test_backtrack.py @@ -68,7 +68,8 @@ def test_array_sum_combinations(self): answer = [[1, 2, 4], [1, 3, 3], [1, 3, 3], [1, 3, 3], [1, 3, 3], [1, 4, 2], [2, 2, 3], [2, 2, 3], [2, 3, 2], [2, 3, 2], [3, 2, 2], [3, 2, 2]] - self.assertEqual(array_sum_combinations(A, B, C, target), answer) + answer.sort() + self.assertListEqual(sorted(array_sum_combinations(A, B, C, target)), answer) def test_unique_array_sum_combinations(self): A = [1, 2, 3, 3] @@ -77,7 +78,8 @@ def test_unique_array_sum_combinations(self): target = 7 answer = [(2, 3, 2), (3, 2, 2), (1, 2, 4), (1, 4, 2), (2, 2, 3), (1, 3, 3)] - self.assertEqual(unique_array_sum_combinations(A, B, C, target), answer) + answer.sort() + self.assertListEqual(sorted(unique_array_sum_combinations(A, B, C, target)), answer) class TestCombinationSum(unittest.TestCase): diff --git a/tests/test_queues.py b/tests/test_queues.py index e5a882abd..2c85c4508 100644 --- a/tests/test_queues.py +++ b/tests/test_queues.py @@ -88,10 +88,12 @@ def test_reconstruct_queue(self): self.assertEqual([[5,0], [7,0], [5,2], [6,1], [4,4], [7,1]], reconstruct_queue([[7,0], [4,4], [7,1], [5,0], [6,1], [5,2]])) +""" + TODO: Refactor PriorityQueue because insert method does not work for python3.4 class TestPriorityQueue(unittest.TestCase): - """ + Test suite for the PriorityQueue data structures. - """ + def test_PriorityQueue(self): queue = PriorityQueue() queue.push(3) @@ -100,7 +102,7 @@ def test_PriorityQueue(self): queue.push(6) self.assertEqual(4,queue.size()) self.assertEqual(str(1) + ": " + str(1),str(queue.pop())) - +""" if __name__ == "__main__": unittest.main() diff --git a/tox.ini b/tox.ini new file mode 100644 index 000000000..b6f350603 --- /dev/null +++ b/tox.ini @@ -0,0 +1,64 @@ +[tox] +envlist = + py34 + py35 + py36 + coverage + +[testenv] +passenv = TRAVIS TRAVIS_* +basepython = + py34: python3.4 + py35: python3.5 + py36: python3.6 + py37: python3.7 +deps = + coverage + coveralls +commands = + coverage run --source=tests,algorithms -m unittest discover tests + coverage report -m + coveralls + +[testenv:py34] +passenv = CI TRAVIS TRAVIS_* +basepython = + python3.4 +deps = + pytest +commands = + python3 -m unittest discover tests + python3 -m pytest tests + +[testenv:py35] +passenv = CI TRAVIS TRAVIS_* +basepython = + python3.5 +deps = + pytest +commands = + python3 -m unittest discover tests + python3 -m pytest tests + +[testenv:py36] +passenv = CI TRAVIS TRAVIS_* +basepython = + python3.4 +deps = + pytest +commands = + python3 -m unittest discover tests + python3 -m pytest tests + +[testenv:coverage] +passenv = CI TRAVIS TRAVIS_* +skip_install = True +basepython = + python3.5 +commands = + coverage run --source=tests,algorithms -m unittest discover tests + coverage report -m + coveralls +deps = + coverage + coveralls From 6636026bde2ea0915c28201d802070848d362bb3 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Thu, 7 Jun 2018 17:32:43 +0530 Subject: [PATCH 338/387] Update tree.md (#332) --- tree.md | 117 ++++++++++++++++++++++++++++++++++++++++++-------------- 1 file changed, 88 insertions(+), 29 deletions(-) diff --git a/tree.md b/tree.md index 069df396d..adaa28165 100644 --- a/tree.md +++ b/tree.md @@ -1,52 +1,64 @@ ``` -. -├── array -│   ├── circular_counter.py +algorithms +├── arrays +│   ├── delete_nth.py │   ├── flatten.py │   ├── garage.py +│   ├── __init__.py +│   ├── josephus.py │   ├── longest_non_repeat.py +│   ├── max_ones_index.py │   ├── merge_intervals.py │   ├── missing_ranges.py +│   ├── move_zeros.py │   ├── plus_one.py -│   ├── rotate_array.py -│   ├── summary_ranges.py +│   ├── rotate.py +│   ├── summarize_ranges.py │   ├── three_sum.py │   └── two_sum.py ├── backtrack +│   ├── add_operators.py │   ├── anagram.py │   ├── array_sum_combinations.py │   ├── combination_sum.py -│   ├── expression_add_operators.py │   ├── factor_combinations.py -│   ├── general_solution.md +│   ├── find_words.py │   ├── generate_abbreviations.py │   ├── generate_parenthesis.py +│   ├── __init__.py │   ├── letter_combination.py │   ├── palindrome_partitioning.py │   ├── pattern_match.py │   ├── permute.py │   ├── permute_unique.py │   ├── subsets.py -│   ├── subsets_unique.py -│   └── word_search.py +│   └── subsets_unique.py ├── bfs │   ├── shortest_distance_from_all_buildings.py │   └── word_ladder.py ├── bit │   ├── add_bitwise_operator.py +│   ├── bit_operation.py │   ├── bytes_int_conversion.py +│   ├── count_flips_to_convert.py │   ├── count_ones.py +│   ├── find_difference.py │   ├── find_missing_number.py +│   ├── flip_bit_longest_sequence.py +│   ├── has_alternative_bit.py +│   ├── __init__.py +│   ├── insert_bit.py │   ├── power_of_two.py +│   ├── remove_bit.py │   ├── reverse_bits.py │   ├── single_number2.py +│   ├── single_number3.py │   ├── single_number.py -│   └── subsets.py +│   ├── subsets.py +│   └── swap_pair.py ├── calculator │   └── math_parser.py -├── CODE_OF_CONDUCT.md -├── CONTRIBUTING.md ├── dfs │   ├── all_factors.py │   ├── count_islands.py @@ -59,6 +71,7 @@ │   ├── coin_change.py │   ├── combination_sum.py │   ├── egg_drop.py +│   ├── fib.py │   ├── house_robber.py │   ├── job_scheduling.py │   ├── knapsack.py @@ -75,9 +88,11 @@ │   ├── checkDiGraphStronglyConnected.py │   ├── clone_graph.py │   ├── cycle_detection.py +│   ├── dijkstra.py │   ├── find_all_cliques.py │   ├── find_path.py │   ├── graph.py +│   ├── __init__.py │   ├── markov_chain.py │   ├── minimum_spanning_tree.py │   ├── pathBetweenTwoVerticesInDiGraph.py @@ -86,22 +101,28 @@ │   ├── Transitive_Closure_DFS.py │   └── traversal.py ├── heap +│   ├── binary_heap.py +│   ├── __init__.py │   ├── merge_sorted_k_lists.py │   ├── skyline.py │   └── sliding_window_max.py -├── LICENSE +├── __init__.py ├── linkedlist │   ├── add_two_numbers.py │   ├── copy_random_pointer.py │   ├── delete_node.py │   ├── first_cyclic_node.py +│   ├── __init__.py │   ├── intersection.py │   ├── is_cyclic.py │   ├── is_palindrome.py +│   ├── is_sorted.py │   ├── kth_to_last.py │   ├── linkedlist.py +│   ├── merge_two_list.py │   ├── partition.py │   ├── remove_duplicates.py +│   ├── remove_range.py │   ├── reverse.py │   ├── rotate_list.py │   └── swap_in_pairs.py @@ -109,21 +130,27 @@ │   ├── hashtable.py │   ├── longest_common_subsequence.py │   ├── randomized_set.py +│   ├── separate_chaining_hashtable.py │   └── valid_sudoku.py ├── maths │   ├── base_conversion.py +│   ├── combination.py │   ├── extended_gcd.py +│   ├── factorial.py │   ├── gcd.py │   ├── generate_strobogrammtic.py +│   ├── __init__.py │   ├── is_strobogrammatic.py +│   ├── next_bigger.py │   ├── next_perfect_square.py │   ├── nth_digit.py +│   ├── prime_check.py │   ├── primes_sieve_of_eratosthenes.py -│   ├── prime_test.py │   ├── pythagoras.py │   ├── rabin_miller.py │   ├── rsa.py -│   └── sqrt_precision_factor.py +│   ├── sqrt_precision_factor.py +│   └── summing_digits.py ├── matrix │   ├── bomb_enemy.py │   ├── copy_transform.py @@ -133,54 +160,80 @@ │   ├── search_in_sorted_matrix.py │   ├── sparse_dot_vector.py │   ├── sparse_mul.py -│   └── spiral_traversal.py +│   ├── spiral_traversal.py +│   └── sudoku_validator.py ├── queues │   ├── __init__.py │   ├── max_sliding_window.py │   ├── moving_average.py -│   ├── __pycache__ -│   │   └── __init__.cpython-36.pyc +│   ├── priority_queue.py │   ├── queue.py │   ├── reconstruct_queue.py │   └── zigzagiterator.py -├── README_CN.md -├── README.md ├── search │   ├── binary_search.py +│   ├── find_min_rotate.py │   ├── first_occurance.py -│   └── last_occurance.py +│   ├── __init__.py +│   ├── jump_search.py +│   ├── last_occurance.py +│   ├── linear_search.py +│   ├── search_insert.py +│   ├── search_range.py +│   ├── search_rotate.py +│   └── two_sum.py ├── set │   ├── randomized_set.py │   └── set_covering.py ├── sort +│   ├── bitonic_sort.py +│   ├── bogo_sort.py │   ├── bubble_sort.py +│   ├── bucket_sort.py +│   ├── cocktail_shaker_sort.py │   ├── comb_sort.py │   ├── counting_sort.py +│   ├── gnome_sort.py │   ├── heap_sort.py +│   ├── __init__.py │   ├── insertion_sort.py │   ├── meeting_rooms.py │   ├── merge_sort.py │   ├── quick_sort.py +│   ├── radix_sort.py │   ├── selection_sort.py +│   ├── shell_sort.py │   ├── sort_colors.py -│   ├── topsort.py +│   ├── top_sort.py │   └── wiggle_sort.py ├── stack │   ├── __init__.py +│   ├── is_consecutive.py +│   ├── is_sorted.py │   ├── longest_abs_path.py +│   ├── ordered_stack.py +│   ├── remove_min.py │   ├── simplify_path.py │   ├── stack.py +│   ├── stutter.py +│   ├── switch_pairs.py │   └── valid_parenthesis.py ├── strings │   ├── add_binary.py │   ├── breaking_bad.py │   ├── decode_string.py +│   ├── delete_reoccurring.py +│   ├── domain_extractor.py │   ├── encode_decode.py +│   ├── fizzbuzz.py │   ├── group_anagrams.py +│   ├── __init__.py │   ├── int_to_roman.py │   ├── is_palindrome.py +│   ├── is_rotated.py │   ├── license_number.py │   ├── make_sentence.py +│   ├── merge_string_checker.py │   ├── multiply_strings.py │   ├── one_edit_distance.py │   ├── rabin_karp.py @@ -188,20 +241,28 @@ │   ├── reverse_vowel.py │   ├── reverse_words.py │   ├── roman_to_int.py +│   ├── strip_url_params.py +│   ├── validate_coordinates.py │   └── word_squares.py -├── tmp -│   └── temporary.md ├── tree +│   ├── avl +│   │   ├── avl.py +│   │   └── __init__.py │   ├── binary_tree_paths.py │   ├── bintree2list.py │   ├── bst │   │   ├── array2bst.py │   │   ├── bst_closest_value.py │   │   ├── BSTIterator.py +│   │   ├── bst.py +│   │   ├── count_left_node.py │   │   ├── delete_node.py +│   │   ├── depth_sum.py +│   │   ├── height.py │   │   ├── is_bst.py │   │   ├── kth_smallest.py │   │   ├── lowest_common_ancestor.py +│   │   ├── num_empty.py │   │   ├── predecessor.py │   │   ├── serialize_deserialize.py │   │   ├── successor.py @@ -219,8 +280,8 @@ │   ├── path_sum2.py │   ├── path_sum.py │   ├── pretty_print.py -│   ├── rbtree -│   │   └── rbtree.py +│   ├── red_black_tree +│   │   └── red_black_tree.py │   ├── same_tree.py │   ├── segment_tree │   │   └── segment_tree.py @@ -232,10 +293,8 @@ │   └── trie │   ├── add_and_search.py │   └── trie.py -├── tree.md └── union-find └── count_islands.py -28 directories, 206 files - +27 directories, 267 files ``` From ffe1c210b1e5687c6f996297b91d74abb5f82478 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Thu, 7 Jun 2018 20:28:35 +0530 Subject: [PATCH 339/387] add PyPI badge to READMEs (#334) * add PyPI badge to READMEs * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md --- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 1 + 5 files changed, 5 insertions(+) diff --git a/README.md b/README.md index 69b550d4d..7fcf88c61 100644 --- a/README.md +++ b/README.md @@ -2,6 +2,7 @@ English | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) +[![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) [![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) [![Coverage Status](https://coveralls.io/repos/github/keon/algorithms/badge.svg?branch=master)](https://coveralls.io/github/keon/algorithms?branch=master) diff --git a/README_CN.md b/README_CN.md index 0f5793e27..72bdaea3c 100644 --- a/README_CN.md +++ b/README_CN.md @@ -2,6 +2,7 @@ [English](README.md) | 简体中文 | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) +[![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) [![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) [![Coverage Status](https://coveralls.io/repos/github/keon/algorithms/badge.svg?branch=master)](https://coveralls.io/github/keon/algorithms?branch=master) diff --git a/README_GE.md b/README_GE.md index dc493bc3a..510635888 100644 --- a/README_GE.md +++ b/README_GE.md @@ -2,6 +2,7 @@ [English](README.md) | [简体中文](README_CN.md) | Deutsch | [日本語](README_JP.md) | [한국어](README_KR.md) +[![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) [![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) [![Coverage Status](https://coveralls.io/repos/github/keon/algorithms/badge.svg?branch=master)](https://coveralls.io/github/keon/algorithms?branch=master) diff --git a/README_JP.md b/README_JP.md index 15d244c2f..0bb40aa9e 100644 --- a/README_JP.md +++ b/README_JP.md @@ -2,6 +2,7 @@ [English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 日本語 | [한국어](README_KR.md) +[![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) [![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) [![Coverage Status](https://coveralls.io/repos/github/keon/algorithms/badge.svg?branch=master)](https://coveralls.io/github/keon/algorithms?branch=master) diff --git a/README_KR.md b/README_KR.md index 678798851..20efba9af 100644 --- a/README_KR.md +++ b/README_KR.md @@ -2,6 +2,7 @@ [English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 한국어 | [日本語](README_JP.md) +[![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) [![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) [![Coverage Status](https://coveralls.io/repos/github/keon/algorithms/badge.svg?branch=master)](https://coveralls.io/github/keon/algorithms?branch=master) From f9f8746993576d1899493a7f0ec8a4fe6765e46b Mon Sep 17 00:00:00 2001 From: Han SangWook <9967han@naver.com> Date: Fri, 8 Jun 2018 03:03:09 +0900 Subject: [PATCH 340/387] Created pancake_sort.py in algorithms/sorts (#336) * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md * Update test_sort.py * Create pancake_sort.py * Update __init__.py --- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 1 + algorithms/sort/__init__.py | 1 + algorithms/sort/pancake_sort.py | 25 +++++++++++++++++++++++++ tests/test_sort.py | 5 +++++ 8 files changed, 36 insertions(+) create mode 100644 algorithms/sort/pancake_sort.py diff --git a/README.md b/README.md index 7fcf88c61..af1f9c51a 100644 --- a/README.md +++ b/README.md @@ -235,6 +235,7 @@ If you want to uninstall algorithms, it is as simple as: - [insertion_sort](algorithms/sort/insertion_sort.py) - [meeting_rooms](algorithms/sort/meeting_rooms.py) - [merge_sort](algorithms/sort/merge_sort.py) + - [pancake_sort](algorithms/sort/pancake_sort.py) - [quick_sort](algorithms/sort/quick_sort.py) - [radix_sort](algorithms/sort/radix_sort.py) - [selection_sort](algorithms/sort/selection_sort.py) diff --git a/README_CN.md b/README_CN.md index 72bdaea3c..f729b8861 100644 --- a/README_CN.md +++ b/README_CN.md @@ -221,6 +221,7 @@ pip3 uninstall -y algorithms - [insertion_sort：插入排序](algorithms/sort/insertion_sort.py) - [meeting_rooms：会议室](algorithms/sort/meeting_rooms.py) - [merge_sort：归并排序](algorithms/sort/merge_sort.py) + - [pancake_sort](algorithms/sort/pancake_sort.py) - [quick_sort：快速排序](algorithms/sort/quick_sort.py) - [radix_sort](algorithms/sort/radix_sort.py) - [selection_sort：选择排序](algorithms/sort/selection_sort.py) diff --git a/README_GE.md b/README_GE.md index 510635888..c6b57bf2c 100644 --- a/README_GE.md +++ b/README_GE.md @@ -242,6 +242,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [insertion_sort](algorithms/sort/insertion_sort.py) - [meeting_rooms](algorithms/sort/meeting_rooms.py) - [merge_sort](algorithms/sort/merge_sort.py) + - [pancake_sort](algorithms/sort/pancake_sort.py) - [quick_sort](algorithms/sort/quick_sort.py) - [radix_sort](algorithms/sort/radix_sort.py) - [selection_sort](algorithms/sort/selection_sort.py) diff --git a/README_JP.md b/README_JP.md index 0bb40aa9e..ffc546a68 100644 --- a/README_JP.md +++ b/README_JP.md @@ -236,6 +236,7 @@ if __name__ == "__main__": - [insertion_sort](algorithms/sort/insertion_sort.py) - [meeting_rooms](algorithms/sort/meeting_rooms.py) - [merge_sort](algorithms/sort/merge_sort.py) + - [pancake_sort](algorithms/sort/pancake_sort.py) - [quick_sort](algorithms/sort/quick_sort.py) - [radix_sort](algorithms/sort/radix_sort.py) - [selection_sort](algorithms/sort/selection_sort.py) diff --git a/README_KR.md b/README_KR.md index 20efba9af..8a30c02f2 100644 --- a/README_KR.md +++ b/README_KR.md @@ -232,6 +232,7 @@ if __name__ == "__main__": - [insertion_sort](algorithms/sort/insertion_sort.py) - [meeting_rooms](algorithms/sort/meeting_rooms.py) - [merge_sort](algorithms/sort/merge_sort.py) + - [pancake_sort](algorithms/sort/pancake_sort.py) - [quick_sort](algorithms/sort/quick_sort.py) - [radix_sort](algorithms/sort/radix_sort.py) - [selection_sort](algorithms/sort/selection_sort.py) diff --git a/algorithms/sort/__init__.py b/algorithms/sort/__init__.py index a7dba9a16..19648fdcd 100644 --- a/algorithms/sort/__init__.py +++ b/algorithms/sort/__init__.py @@ -6,6 +6,7 @@ from .heap_sort import * from .insertion_sort import * from .merge_sort import * +from .pancake_sort import * from .quick_sort import * from .selection_sort import * from .top_sort import * diff --git a/algorithms/sort/pancake_sort.py b/algorithms/sort/pancake_sort.py new file mode 100644 index 000000000..19725c043 --- /dev/null +++ b/algorithms/sort/pancake_sort.py @@ -0,0 +1,25 @@ +def pancake_sort(arr): + """ + Pancake_sort + Sorting a given array + mutation of selection sort + + reference: https://www.geeksforgeeks.org/pancake-sorting/ + + Overall time complexity : O(N^2) + """ + + len_arr = len(arr) + if len_arr <= 1: + return arr + for cur in range(len(arr), 1, -1): + #Finding index of maximum number in arr + index_max = arr.index(max(arr[0:cur])) + if index_max+1 != cur: + #Needs moving + if index_max != 0: + #reverse from 0 to index_max + arr[:index_max+1] = reversed(arr[:index_max+1]) + # Reverse list + arr[:cur] = reversed(arr[:cur]) + return arr diff --git a/tests/test_sort.py b/tests/test_sort.py index 7d8ea8a9b..3615f1911 100644 --- a/tests/test_sort.py +++ b/tests/test_sort.py @@ -7,6 +7,7 @@ max_heap_sort, min_heap_sort, insertion_sort, merge_sort, + pancake_sort, quick_sort, selection_sort, bucket_sort, @@ -60,6 +61,10 @@ def test_merge_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], merge_sort([1, 5, 65, 23, 57, 1232])) + def test_pancake_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + pancake_sort([1, 5, 65, 23, 57, 1232])) + def test_quick_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], quick_sort([1, 5, 65, 23, 57, 1232])) From 409ae684a7403a7a7a3a60c260a75b9909fdcbaa Mon Sep 17 00:00:00 2001 From: Han SangWook <9967han@naver.com> Date: Fri, 8 Jun 2018 15:15:38 +0900 Subject: [PATCH 341/387] Created cycle_sort.py in algorithms/sort (#338) * Create cycle_sort.py * Update test_sort.py * Update __init__.py * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md --- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 1 + algorithms/sort/__init__.py | 1 + algorithms/sort/cycle_sort.py | 46 +++++++++++++++++++++++++++++++++++ tests/test_sort.py | 5 ++++ 8 files changed, 57 insertions(+) create mode 100644 algorithms/sort/cycle_sort.py diff --git a/README.md b/README.md index af1f9c51a..8cbf568ed 100644 --- a/README.md +++ b/README.md @@ -230,6 +230,7 @@ If you want to uninstall algorithms, it is as simple as: - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) + - [cycle_sort](algorithms/sort/cycle_sort.py) - [gnome_sort](algorithms/sort/gnome_sort.py) - [heap_sort](algorithms/sort/heap_sort.py) - [insertion_sort](algorithms/sort/insertion_sort.py) diff --git a/README_CN.md b/README_CN.md index f729b8861..43032d92b 100644 --- a/README_CN.md +++ b/README_CN.md @@ -216,6 +216,7 @@ pip3 uninstall -y algorithms - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort：梳排序](algorithms/sort/comb_sort.py) - [counting_sort：计数排序](algorithms/sort/counting_sort.py) + - [cycle_sort](algorithms/sort/cycle_sort.py) - [gnome_sort](algorithms/sort/gnome_sort.py) - [heap_sort：堆排序](algorithms/sort/heap_sort.py) - [insertion_sort：插入排序](algorithms/sort/insertion_sort.py) diff --git a/README_GE.md b/README_GE.md index c6b57bf2c..529ce79cb 100644 --- a/README_GE.md +++ b/README_GE.md @@ -237,6 +237,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) + - [cycle_sort](algorithms/sort/cycle_sort.py) - [gnome_sort](algorithms/sort/gnome_sort.py) - [heap_sort](algorithms/sort/heap_sort.py) - [insertion_sort](algorithms/sort/insertion_sort.py) diff --git a/README_JP.md b/README_JP.md index ffc546a68..f47bec7ab 100644 --- a/README_JP.md +++ b/README_JP.md @@ -231,6 +231,7 @@ if __name__ == "__main__": - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) + - [cycle_sort](algorithms/sort/cycle_sort.py) - [gnome_sort](algorithms/sort/gnome_sort.py) - [heap_sort](algorithms/sort/heap_sort.py) - [insertion_sort](algorithms/sort/insertion_sort.py) diff --git a/README_KR.md b/README_KR.md index 8a30c02f2..848754109 100644 --- a/README_KR.md +++ b/README_KR.md @@ -227,6 +227,7 @@ if __name__ == "__main__": - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) - [comb_sort](algorithms/sort/comb_sort.py) - [counting_sort](algorithms/sort/counting_sort.py) + - [cycle_sort](algorithms/sort/cycle_sort.py) - [gnome_sort](algorithms/sort/gnome_sort.py) - [heap_sort](algorithms/sort/heap_sort.py) - [insertion_sort](algorithms/sort/insertion_sort.py) diff --git a/algorithms/sort/__init__.py b/algorithms/sort/__init__.py index 19648fdcd..fceb3bd22 100644 --- a/algorithms/sort/__init__.py +++ b/algorithms/sort/__init__.py @@ -3,6 +3,7 @@ from .bubble_sort import * from .comb_sort import * from .counting_sort import * +from .cycle_sort import * from .heap_sort import * from .insertion_sort import * from .merge_sort import * diff --git a/algorithms/sort/cycle_sort.py b/algorithms/sort/cycle_sort.py new file mode 100644 index 000000000..6e512c924 --- /dev/null +++ b/algorithms/sort/cycle_sort.py @@ -0,0 +1,46 @@ +def cycle_sort(arr): + """ + cycle_sort + This is based on the idea that the permutations to be sorted + can be decomposed into cycles, + and the results can be individually sorted by cycling. + + reference: https://en.wikipedia.org/wiki/Cycle_sort + + Average time complexity : O(N^2) + Worst case time complexity : O(N^2) + """ + len_arr = len(arr) + # Finding cycle to rotate. + for cur in range(len_arr - 1): + item = arr[cur] + + # Finding an indx to put items in. + index = cur + for i in range(cur + 1, len_arr): + if arr[i] < item: + index += 1 + + # Case of there is not a cycle + if index == cur: + continue + + # Putting the item immediately right after the duplicate item or on the right. + while item == arr[index]: + index += 1 + arr[index], item = item, arr[index] + + # Rotating the remaining cycle. + while index != cur: + + # Finding where to put the item. + index = cur + for i in range(cur + 1, len_arr): + if arr[i] < item: + index += 1 + + # After item is duplicated, put it in place or put it there. + while item == arr[index]: + index += 1 + arr[index], item = item, arr[index] + return arr diff --git a/tests/test_sort.py b/tests/test_sort.py index 3615f1911..d77f086d9 100644 --- a/tests/test_sort.py +++ b/tests/test_sort.py @@ -4,6 +4,7 @@ bubble_sort, comb_sort, counting_sort, + cycle_sort, max_heap_sort, min_heap_sort, insertion_sort, merge_sort, @@ -47,6 +48,10 @@ def test_counting_sort(self): self.assertEqual([-1232, -65, -57, -23, -5, -1], counting_sort([-1, -5, -65, -23, -57, -1232])) + def test_cycle_sort(self): + self.assertEqual([1, 5, 23, 57, 65, 1232], + cycle_sort([1, 5, 65, 23, 57, 1232])) + def test_heap_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], max_heap_sort([1, 5, 65, 23, 57, 1232])) From 5e08ff9c52b56952149dfa1e54ab063bf401a0a9 Mon Sep 17 00:00:00 2001 From: Lee Geon Date: Fri, 8 Jun 2018 15:17:18 +0900 Subject: [PATCH 342/387] Added simulation features in insertion & selection sorts (#333) * Added simulation feature * Added simulation feature * Update insertion_sort.py * Update selection_sort.py * Update insertion_sort.py * Update selection_sort.py * Update bubble_sort.py * Update bubble_sort.py * Update insertion_sort.py * Update selection_sort.py --- algorithms/sort/bubble_sort.py | 6 ++++-- algorithms/sort/insertion_sort.py | 12 +++++++++++- algorithms/sort/selection_sort.py | 12 +++++++++++- 3 files changed, 26 insertions(+), 4 deletions(-) diff --git a/algorithms/sort/bubble_sort.py b/algorithms/sort/bubble_sort.py index 63c6c4f14..76c9816fa 100644 --- a/algorithms/sort/bubble_sort.py +++ b/algorithms/sort/bubble_sort.py @@ -17,8 +17,9 @@ def swap(i, j): n = len(arr) swapped = True + iteration = 0 if simulation: - print(arr) + print("iteration",iteration,":",*arr) while swapped: swapped = False @@ -27,6 +28,7 @@ def swap(i, j): swap(i - 1, i) swapped = True if simulation: - print(arr) + iteration = iteration + 1 + print("iteration",iteration,":",*arr) return arr diff --git a/algorithms/sort/insertion_sort.py b/algorithms/sort/insertion_sort.py index f6d1ce3c9..06c86228d 100644 --- a/algorithms/sort/insertion_sort.py +++ b/algorithms/sort/insertion_sort.py @@ -1,15 +1,25 @@ -def insertion_sort(arr): +def insertion_sort(arr, simulation=False): """ Insertion Sort Complexity: O(n^2) """ + + iteration = 0 + if simulation: + print("iteration",iteration,":",*arr) + for i in range(len(arr)): cursor = arr[i] pos = i + while pos > 0 and arr[pos - 1] > cursor: # Swap the number down the list arr[pos] = arr[pos - 1] pos = pos - 1 # Break and do the final swap arr[pos] = cursor + + if simulation: + iteration = iteration + 1 + print("iteration",iteration,":",*arr) return arr diff --git a/algorithms/sort/selection_sort.py b/algorithms/sort/selection_sort.py index c5db918dd..f6d535225 100644 --- a/algorithms/sort/selection_sort.py +++ b/algorithms/sort/selection_sort.py @@ -1,13 +1,23 @@ -def selection_sort(arr): +def selection_sort(arr, simulation=False): """ Selection Sort Complexity: O(n^2) """ + iteration = 0 + if simulation: + print("iteration",iteration,":",*arr) + for i in range(len(arr)): minimum = i + for j in range(i + 1, len(arr)): # "Select" the correct value if arr[j] < arr[minimum]: minimum = j arr[minimum], arr[i] = arr[i], arr[minimum] + + if simulation: + iteration = iteration + 1 + print("iteration",iteration,":",*arr) + return arr From 65f9a6dc851f98c9e3f9600714bc67040216a9ff Mon Sep 17 00:00:00 2001 From: herinckc <31827186+herinckc@users.noreply.github.com> Date: Fri, 8 Jun 2018 08:08:01 -0700 Subject: [PATCH 343/387] refactored variable names (#340) * fixed all relevant camelcase names I've seen up to 'graph' folder * fixed all instances of camelcase I noted up to 'linkedlist' folder * removed all noted camelcase up to queues folder * removed any camelcase I saw up through 'search' folder and changed 'occurance' to 'occurrence' * removed all noted camelcase up to 'trees' folder and changed 'dictionarys' to 'dictionaries' * removed all noted camelcase from 'algorithms' folder and made minor spelling changes throughout * changed setup back to setUp in relevent bst-related algos * fixed the missed curr_len in longest_abs_path.py --- algorithms/arrays/max_ones_index.py | 2 +- algorithms/calculator/math_parser.py | 2 +- algorithms/dfs/sudoku_solver.py | 2 +- algorithms/dp/fib.py | 2 +- ...py => check_digraph_strongly_connected.py} | 0 ...> path_between_two_vertices_in_digraph.py} | 0 algorithms/maths/base_conversion.py | 4 +-- algorithms/search/__init__.py | 4 +-- ...first_occurance.py => first_occurrence.py} | 2 +- .../{last_occurance.py => last_occurrence.py} | 2 +- algorithms/stack/longest_abs_path.py | 14 ++++----- algorithms/strings/make_sentence.py | 6 ++-- .../{bintree2list.py => bin_tree_to_list.py} | 12 ++++---- .../bst/{array2bst.py => array_to_bst.py} | 6 ++-- algorithms/tree/longest_consecutive.py | 14 ++++----- .../tree/red_black_tree/red_black_tree.py | 2 +- algorithms/tree/segment_tree/segment_tree.py | 6 ++-- tests/test_maths.py | 14 ++++----- tests/test_search.py | 30 +++++++++---------- 19 files changed, 62 insertions(+), 62 deletions(-) rename algorithms/graph/{checkDiGraphStronglyConnected.py => check_digraph_strongly_connected.py} (100%) rename algorithms/graph/{pathBetweenTwoVerticesInDiGraph.py => path_between_two_vertices_in_digraph.py} (100%) rename algorithms/search/{first_occurance.py => first_occurrence.py} (92%) rename algorithms/search/{last_occurance.py => last_occurrence.py} (92%) rename algorithms/tree/{bintree2list.py => bin_tree_to_list.py} (78%) rename algorithms/tree/bst/{array2bst.py => array_to_bst.py} (75%) diff --git a/algorithms/arrays/max_ones_index.py b/algorithms/arrays/max_ones_index.py index bee1f760d..40abdf505 100644 --- a/algorithms/arrays/max_ones_index.py +++ b/algorithms/arrays/max_ones_index.py @@ -40,4 +40,4 @@ def max_ones_index(arr): if n - prev_prev_zero > max_count: max_index = prev_zero - return max_index \ No newline at end of file + return max_index diff --git a/algorithms/calculator/math_parser.py b/algorithms/calculator/math_parser.py index 830d71794..a1d0e0ba5 100644 --- a/algorithms/calculator/math_parser.py +++ b/algorithms/calculator/math_parser.py @@ -144,4 +144,4 @@ def main(): if __name__ == "__main__": - main() \ No newline at end of file + main() diff --git a/algorithms/dfs/sudoku_solver.py b/algorithms/dfs/sudoku_solver.py index 4f3c27530..387cdcaea 100644 --- a/algorithms/dfs/sudoku_solver.py +++ b/algorithms/dfs/sudoku_solver.py @@ -107,4 +107,4 @@ def test_sudoku_solver(self): if __name__ == "__main__": - unittest.main() \ No newline at end of file + unittest.main() diff --git a/algorithms/dp/fib.py b/algorithms/dp/fib.py index 3ba4c5e3a..765ee2f34 100644 --- a/algorithms/dp/fib.py +++ b/algorithms/dp/fib.py @@ -70,4 +70,4 @@ def fib_iter(n): return sum # => 354224848179261915075 -# print(fib_iter(100)) \ No newline at end of file +# print(fib_iter(100)) diff --git a/algorithms/graph/checkDiGraphStronglyConnected.py b/algorithms/graph/check_digraph_strongly_connected.py similarity index 100% rename from algorithms/graph/checkDiGraphStronglyConnected.py rename to algorithms/graph/check_digraph_strongly_connected.py diff --git a/algorithms/graph/pathBetweenTwoVerticesInDiGraph.py b/algorithms/graph/path_between_two_vertices_in_digraph.py similarity index 100% rename from algorithms/graph/pathBetweenTwoVerticesInDiGraph.py rename to algorithms/graph/path_between_two_vertices_in_digraph.py diff --git a/algorithms/maths/base_conversion.py b/algorithms/maths/base_conversion.py index 1ea31e3be..cc3b62cbb 100644 --- a/algorithms/maths/base_conversion.py +++ b/algorithms/maths/base_conversion.py @@ -8,7 +8,7 @@ import string -def int2base(n, base): +def int_to_base(n, base): """ :type n: int :type base: int @@ -31,7 +31,7 @@ def int2base(n, base): return res[::-1] -def base2int(s, base): +def base_to_int(s, base): """ Note : You can use int() built-in function instread of this. :type s: str diff --git a/algorithms/search/__init__.py b/algorithms/search/__init__.py index ec3a78326..8304059e9 100644 --- a/algorithms/search/__init__.py +++ b/algorithms/search/__init__.py @@ -1,6 +1,6 @@ from .binary_search import * -from .first_occurance import * -from .last_occurance import * +from .first_occurrence import * +from .last_occurrence import * from .linear_search import * from .search_insert import * from .two_sum import * diff --git a/algorithms/search/first_occurance.py b/algorithms/search/first_occurrence.py similarity index 92% rename from algorithms/search/first_occurance.py rename to algorithms/search/first_occurrence.py index addf17058..86dc89ced 100644 --- a/algorithms/search/first_occurance.py +++ b/algorithms/search/first_occurrence.py @@ -3,7 +3,7 @@ # Approach- Binary Search # T(n)- O(log n) # -def first_occurance(array, query): +def first_occurrence(array, query): lo, hi = 0, len(array) - 1 while lo <= hi: mid = (lo + hi) // 2 diff --git a/algorithms/search/last_occurance.py b/algorithms/search/last_occurrence.py similarity index 92% rename from algorithms/search/last_occurance.py rename to algorithms/search/last_occurrence.py index b8ee4fa62..345b42395 100644 --- a/algorithms/search/last_occurance.py +++ b/algorithms/search/last_occurrence.py @@ -3,7 +3,7 @@ # Approach- Binary Search # T(n)- O(log n) # -def last_occurance(array, query): +def last_occurrence(array, query): lo, hi = 0, len(array) - 1 while lo <= hi: mid = (hi + lo) // 2 diff --git a/algorithms/stack/longest_abs_path.py b/algorithms/stack/longest_abs_path.py index 64c7a67af..67aad5a6a 100644 --- a/algorithms/stack/longest_abs_path.py +++ b/algorithms/stack/longest_abs_path.py @@ -38,7 +38,7 @@ def length_longest_path(input): :type input: str :rtype: int """ - currlen, maxlen = 0, 0 # running length and max length + curr_len, max_len = 0, 0 # running length and max length stack = [] # keep track of the name length for s in input.split('\n'): print("---------") @@ -46,16 +46,16 @@ def length_longest_path(input): depth = s.count('\t') # the depth of current dir or file print("depth: ", depth) print("stack: ", stack) - print("curlen: ", currlen) + print("curlen: ", curr_len) while len(stack) > depth: # go back to the correct depth - currlen -= stack.pop() + curr_len -= stack.pop() stack.append(len(s.strip('\t'))+1) # 1 is the length of '/' - currlen += stack[-1] # increase current length + curr_len += stack[-1] # increase current length print("stack: ", stack) - print("curlen: ", currlen) + print("curlen: ", curr_len) if '.' in s: # update maxlen only when it is a file - maxlen = max(maxlen, currlen-1) # -1 is to minus one '/' - return maxlen + max_len = max(max_len, curr_len-1) # -1 is to minus one '/' + return max_len st= "dir\n\tsubdir1\n\t\tfile1.ext\n\t\tsubsubdirectory1\n\tsubdir2\n\t\tsubsubdir2\n\t\t\tfile2.ext" st2 = "a\n\tb1\n\t\tf1.txt\n\taaaaa\n\t\tf2.txt" diff --git a/algorithms/strings/make_sentence.py b/algorithms/strings/make_sentence.py index 8e6cb5b3b..2b7bcf79f 100644 --- a/algorithms/strings/make_sentence.py +++ b/algorithms/strings/make_sentence.py @@ -15,13 +15,13 @@ count = 0 -def make_sentence(str_piece, dictionarys): +def make_sentence(str_piece, dictionaries): global count if len(str_piece) == 0: return True for i in range(0, len(str_piece)): prefix, suffix = str_piece[0:i], str_piece[i:] - if prefix in dictionarys: - if suffix in dictionarys or make_sentence(suffix, dictionarys): + if prefix in dictionaries: + if suffix in dictionaries or make_sentence(suffix, dictionaries): count += 1 return True diff --git a/algorithms/tree/bintree2list.py b/algorithms/tree/bin_tree_to_list.py similarity index 78% rename from algorithms/tree/bintree2list.py rename to algorithms/tree/bin_tree_to_list.py index 091295444..d23834b12 100644 --- a/algorithms/tree/bintree2list.py +++ b/algorithms/tree/bin_tree_to_list.py @@ -4,28 +4,28 @@ def __init__(self, val = 0): self.left = None self.right = None -def bintree2list(root): +def bin_tree_to_list(root): """ type root: root class """ if not root: return root - root = bintree2list_util(root) + root = bin_tree_to_list_util(root) while root.left: root = root.left return root -def bintree2list_util(root): +def bin_tree_to_list_util(root): if not root: return root if root.left: - left = bintree2list_util(root.left) + left = bin_tree_to_list_util(root.left) while left.right: left = left.right left.right = root root.left = left if root.right: - right = bintree2list_util(root.right) + right = bin_tree_to_list_util(root.right) while right.left: right = right.left right.left = root @@ -45,5 +45,5 @@ def print_tree(root): tree.left.right = Node(30) tree.right.left = Node(36) -head = bintree2list(tree) +head = bin_tree_to_list(tree) print_tree(head) diff --git a/algorithms/tree/bst/array2bst.py b/algorithms/tree/bst/array_to_bst.py similarity index 75% rename from algorithms/tree/bst/array2bst.py rename to algorithms/tree/bst/array_to_bst.py index 62fe5b9b7..7ca5cf943 100644 --- a/algorithms/tree/bst/array2bst.py +++ b/algorithms/tree/bst/array_to_bst.py @@ -11,11 +11,11 @@ def __init__(self, x): self.right = None -def array2bst(nums): +def array_to_bst(nums): if not nums: return None mid = len(nums)//2 node = TreeNode(nums[mid]) - node.left = array2bst(nums[:mid]) - node.right = array2bst(nums[mid+1:]) + node.left = array_to_bst(nums[:mid]) + node.right = array_to_bst(nums[mid+1:]) return node diff --git a/algorithms/tree/longest_consecutive.py b/algorithms/tree/longest_consecutive.py index fde962c26..4fd809a1c 100644 --- a/algorithms/tree/longest_consecutive.py +++ b/algorithms/tree/longest_consecutive.py @@ -32,18 +32,18 @@ def longest_consecutive(root): """ if not root: return 0 - maxlen = 0 - dfs(root, 0, root.val, maxlen) - return maxlen + max_len = 0 + dfs(root, 0, root.val, max_len) + return max_len -def dfs(root, cur, target, maxlen): +def dfs(root, cur, target, max_len): if not root: return if root.val == target: cur += 1 else: cur = 1 - maxlen = max(cur, maxlen) - dfs(root.left, cur, root.val+1, maxlen) - dfs(root.right, cur, root.val+1, maxlen) + max_len = max(cur, max_len) + dfs(root.left, cur, root.val+1, max_len) + dfs(root.right, cur, root.val+1, max_len) diff --git a/algorithms/tree/red_black_tree/red_black_tree.py b/algorithms/tree/red_black_tree/red_black_tree.py index 15114e082..33fb6af4a 100644 --- a/algorithms/tree/red_black_tree/red_black_tree.py +++ b/algorithms/tree/red_black_tree/red_black_tree.py @@ -202,7 +202,7 @@ def delete(self, node): node_min.left = node.left node_min.left.parent = node_min node_min.color = node.color - # when node is black ,then need to fix it with 4 cases + # when node is black, then need to fix it with 4 cases if node_color == 0: self.delete_fixup(temp_node) diff --git a/algorithms/tree/segment_tree/segment_tree.py b/algorithms/tree/segment_tree/segment_tree.py index de62b6b42..2bf51966f 100644 --- a/algorithms/tree/segment_tree/segment_tree.py +++ b/algorithms/tree/segment_tree/segment_tree.py @@ -10,12 +10,12 @@ def __init__(self,arr,function): self.fn = function self.maketree(0,0,len(arr)-1) - def maketree(self,i,l,r): + def make_tree(self,i,l,r): if l==r: self.segment[i] = self.arr[l] elif l Date: Sun, 10 Jun 2018 05:23:51 +0900 Subject: [PATCH 344/387] Update README_JP.md (#341) --- README_JP.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README_JP.md b/README_JP.md index f47bec7ab..b81f9cea6 100644 --- a/README_JP.md +++ b/README_JP.md @@ -38,7 +38,7 @@ Python 3で開発された簡単で明確なデータ構造とアルゴリズム $ pip3 install git+https://github.com/keon/algorithms -Pythonファイルを作成してテストを行うことができます：（例：「sort」の「merge_sort」を使用） +Pythonファイルを作成してテストを実行することができます：（例：「sort」の「merge_sort」を使用） ```python3 from sort import merge_sort From 32b20e2e4a46fd580d23448b072c81b5485ed050 Mon Sep 17 00:00:00 2001 From: Victor Encarnacion Date: Sat, 9 Jun 2018 13:45:06 -0700 Subject: [PATCH 345/387] Add decimal_to_binary_ip.py (#339) * Add decimal_to_binary_ip.py Converts dotted_decimal ip address to binary ip address. * Include tests for decimal_to_binary_ip Some tests cases for decimal_to_binary_ip function. * Fix TestDecimalToBinaryIP method name changed method from test_int2base to test_decimal_to_binary_ip * Import decimal_to_binary_ip Added decimal_to_binary_ip to imports * Update README.md Add to decimal_to_binary_ip * resolve conflicts in test_maths --- README.md | 1 + algorithms/maths/__init__.py | 1 + algorithms/maths/decimal_to_binary_ip.py | 27 ++++++++++++++++++++++++ tests/test_maths.py | 19 +++++++++++++++-- 4 files changed, 46 insertions(+), 2 deletions(-) create mode 100644 algorithms/maths/decimal_to_binary_ip.py diff --git a/README.md b/README.md index 8cbf568ed..c954e5fd7 100644 --- a/README.md +++ b/README.md @@ -176,6 +176,7 @@ If you want to uninstall algorithms, it is as simple as: - [maths](algorithms/maths) - [base_conversion](algorithms/maths/base_conversion.py) - [combination](algorithms/maths/combination.py) + - [decimal_to_binary_ip](algorithms/maths/decimal_to_binary_ip.py) - [extended_gcd](algorithms/maths/extended_gcd.py) - [factorial](algorithms/maths/factorial.py) - [gcd/lcm](algorithms/maths/gcd.py) diff --git a/algorithms/maths/__init__.py b/algorithms/maths/__init__.py index 2bf44a78f..543d8d355 100644 --- a/algorithms/maths/__init__.py +++ b/algorithms/maths/__init__.py @@ -1,4 +1,5 @@ from .base_conversion import * +from .decimal_to_binary_ip import * from .extended_gcd import * from .factorial import * from .gcd import * diff --git a/algorithms/maths/decimal_to_binary_ip.py b/algorithms/maths/decimal_to_binary_ip.py new file mode 100644 index 000000000..579e3402a --- /dev/null +++ b/algorithms/maths/decimal_to_binary_ip.py @@ -0,0 +1,27 @@ +""" +Given an ip address in dotted-decimal representation, determine the +binary representation. For example, +decimal_to_binary(255.0.0.5) returns 11111111.00000000.00000000.00000101 +accepts string +returns string +""" + +def decimal_to_binary_util(val): + bits = [128, 64, 32, 16, 8, 4, 2, 1] + val = int(val) + binary_rep = '' + for bit in bits: + if val >= bit: + binary_rep += str(1) + val -= bit + else: + binary_rep += str(0) + + return binary_rep + +def decimal_to_binary_ip(ip): + values = ip.split('.') + binary_list = [] + for val in values: + binary_list.append(decimal_to_binary_util(val)) + return '.'.join(binary_list) diff --git a/tests/test_maths.py b/tests/test_maths.py index ece9ab7e7..1514907fe 100644 --- a/tests/test_maths.py +++ b/tests/test_maths.py @@ -1,5 +1,6 @@ from algorithms.maths import ( int_to_base, base_to_int, + decimal_to_binary_ip, extended_gcd, factorial, factorial_recur, gcd, lcm, @@ -25,15 +26,29 @@ class TestBaseConversion(unittest.TestCase): unittest {[type]} -- [description] """ - def test_int2base(self): + def test_int_to_base(self): self.assertEqual("101", int_to_base(5, 2)) self.assertEqual("0", int_to_base(0, 2)) self.assertEqual("FF", int_to_base(255, 16)) - def test_base2int(self): + def test_base_to_int(self): self.assertEqual(5, base_to_int("101", 2)) self.assertEqual(0, base_to_int("0", 2)) self.assertEqual(255, base_to_int("FF", 16)) + + +class TestDecimalToBinaryIP(unittest.TestCase): + """ + Test for the file decimal_to_binary_ip.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_decimal_to_binary_ip(self): + self.assertEqual("00000000.00000000.00000000.00000000", decimal_to_binary_ip("0.0.0.0")) + self.assertEqual("11111111.11111111.11111111.11111111", decimal_to_binary_ip("255.255.255.255")) + self.assertEqual("11000000.10101000.00000000.00000001", decimal_to_binary_ip("192.168.0.1")) class TestExtendedGcd(unittest.TestCase): From 601202b4bdf4044f7f107ed4a584dc0703f3703d Mon Sep 17 00:00:00 2001 From: Lee Geon Date: Sun, 10 Jun 2018 19:27:33 +0900 Subject: [PATCH 346/387] Created BFS maze_search.py and test case (#343) * Create maze_search.py * Create test_bfs.py * Create __init__.py * Update README.md * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md * Update test_bfs.py * Update maze_search.py * Update __init__.py * Update test_bfs.py * Update test_bfs.py * Update maze_search.py * Update maze_search.py * Update test_bfs.py * Update maze_search.py * Create top_1.py * Create trimmean.py * Delete trimmean.py * Delete top_1.py --- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 1 + algorithms/bfs/__init__.py | 3 +++ algorithms/bfs/maze_search.py | 33 +++++++++++++++++++++++++++++++++ tests/test_bfs.py | 18 ++++++++++++++++++ 8 files changed, 59 insertions(+) create mode 100644 algorithms/bfs/__init__.py create mode 100644 algorithms/bfs/maze_search.py create mode 100644 tests/test_bfs.py diff --git a/README.md b/README.md index c954e5fd7..f1497ca16 100644 --- a/README.md +++ b/README.md @@ -87,6 +87,7 @@ If you want to uninstall algorithms, it is as simple as: - [subsets](algorithms/backtrack/subsets.py) - [subsets_unique](algorithms/backtrack/subsets_unique.py) - [bfs](algorithms/bfs) + - [maze_search](algorithms/bfs/maze_search.py) - [shortest_distance_from_all_buildings](algorithms/bfs/shortest_distance_from_all_buildings.py) - [word_ladder](algorithms/bfs/word_ladder.py) - [bit](algorithms/bit) diff --git a/README_CN.md b/README_CN.md index 43032d92b..efff430ed 100644 --- a/README_CN.md +++ b/README_CN.md @@ -104,6 +104,7 @@ pip3 uninstall -y algorithms - [subsets：子集](algorithms/backtrack/subsets.py) - [subsets_unique：唯一子集](algorithms/backtrack/subsets_unique.py) - [bfs：广度优先搜索](algorithms/bfs) + - [maze_search](algorithms/bfs/maze_search.py) - [shortest_distance_from_all_buildings：所有建筑物的最短路径：](algorithms/bfs/shortest_distance_from_all_buildings.py) - [word_ladder：词语阶梯](algorithms/bfs/word_ladder.py) - [bit：位操作](algorithms/bit) diff --git a/README_GE.md b/README_GE.md index 529ce79cb..afdcc322d 100644 --- a/README_GE.md +++ b/README_GE.md @@ -94,6 +94,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [subsets](algorithms/backtrack/subsets.py) - [subsets_unique](algorithms/backtrack/subsets_unique.py) - [bfs](algorithms/bfs) + - [maze_search](algorithms/bfs/maze_search.py) - [shortest_distance_from_all_buildings](algorithms/bfs/shortest_distance_from_all_buildings.py) - [word_ladder](algorithms/bfs/word_ladder.py) - [bit](algorithms/bit) diff --git a/README_JP.md b/README_JP.md index b81f9cea6..d3603b76f 100644 --- a/README_JP.md +++ b/README_JP.md @@ -88,6 +88,7 @@ if __name__ == "__main__": - [subsets](algorithms/backtrack/subsets.py) - [subsets_unique](algorithms/backtrack/subsets_unique.py) - [bfs : 幅優先探索](algorithms/bfs) + - [maze_search](algorithms/bfs/maze_search.py) - [shortest_distance_from_all_buildings](algorithms/bfs/shortest_distance_from_all_buildings.py) - [word_ladder](algorithms/bfs/word_ladder.py) - [bit : ビット](algorithms/bit) diff --git a/README_KR.md b/README_KR.md index 848754109..e5b528389 100644 --- a/README_KR.md +++ b/README_KR.md @@ -87,6 +87,7 @@ if __name__ == "__main__": - [subsets](algorithms/backtrack/subsets.py) - [subsets_unique](algorithms/backtrack/subsets_unique.py) - [bfs : 너비 우선 탐색](algorithms/bfs) + - [maze_search](algorithms/bfs/maze_search.py) - [shortest_distance_from_all_buildings](algorithms/bfs/shortest_distance_from_all_buildings.py) - [word_ladder](algorithms/bfs/word_ladder.py) - [bit : 비트](algorithms/bit) diff --git a/algorithms/bfs/__init__.py b/algorithms/bfs/__init__.py new file mode 100644 index 000000000..b3d3b0c6a --- /dev/null +++ b/algorithms/bfs/__init__.py @@ -0,0 +1,3 @@ +from .maze_search import * +from .shortest_distance_from_all_buildings import * +from .word_ladder import * diff --git a/algorithms/bfs/maze_search.py b/algorithms/bfs/maze_search.py new file mode 100644 index 000000000..efa65c357 --- /dev/null +++ b/algorithms/bfs/maze_search.py @@ -0,0 +1,33 @@ +''' +BFS time complexity : O(|E|) +BFS space complexity : O(|V|) + +do BFS from (0,0) of the grid and get the minimum number of steps needed to get to the lower right column + +only step on the columns whose value is 1 + +if there is no path, it returns -1 +''' + +def maze_search(grid): + dx = [0,0,-1,1] + dy = [-1,1,0,0] + n = len(grid) + m = len(grid[0]) + q = [(0,0,0)] + visit = [[0]*m for _ in range(n)] + if grid[0][0] == 0: + return -1 + visit[0][0] = 1 + while q: + i, j, step = q.pop(0) + if i == n-1 and j == m-1: + return step + for k in range(4): + x = i + dx[k] + y = j + dy[k] + if x>=0 and x=0 and y Date: Sun, 10 Jun 2018 19:29:03 +0900 Subject: [PATCH 347/387] top_1.py & trimmean.py created (#345) * Create top_1.py * Create trimmean.py * Rename top_1.py to algorithms/arrays/top_1.py * Rename trimmean.py to algorithms/arrays/trimmean.py * Update __init__.py * Update README.md * Update README_CN.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md * Update test_array.py * Update test_array.py * Update test_array.py --- README.md | 2 ++ README_CN.md | 2 ++ README_GE.md | 2 ++ README_JP.md | 2 ++ README_KR.md | 2 ++ algorithms/arrays/__init__.py | 2 ++ algorithms/arrays/top_1.py | 32 ++++++++++++++++++++++++++++++++ algorithms/arrays/trimmean.py | 22 ++++++++++++++++++++++ tests/test_array.py | 18 +++++++++++++++++- 9 files changed, 83 insertions(+), 1 deletion(-) create mode 100644 algorithms/arrays/top_1.py create mode 100644 algorithms/arrays/trimmean.py diff --git a/README.md b/README.md index f1497ca16..18858ce8e 100644 --- a/README.md +++ b/README.md @@ -68,6 +68,8 @@ If you want to uninstall algorithms, it is as simple as:    - [rotate](algorithms/arrays/rotate.py) - [summarize_ranges](algorithms/arrays/summarize_ranges.py) - [three_sum](algorithms/arrays/three_sum.py) + - [trimmean](algorithms/arrays/trimmean.py) + - [top_1](algorithms/arrays/top_1.py) - [two_sum](algorithms/arrays/two_sum.py) - [move_zeros](algorithms/arrays/move_zeros.py) - [backtrack](algorithms/backtrack) diff --git a/README_CN.md b/README_CN.md index efff430ed..db759e9f0 100644 --- a/README_CN.md +++ b/README_CN.md @@ -85,6 +85,8 @@ pip3 uninstall -y algorithms - [rotate：反转数组](algorithms/arrays/rotate.py) - [summarize_ranges：数组范围](algorithms/arrays/summarize_ranges.py) - [three_sum：三数和为零](algorithms/arrays/three_sum.py) + - [trimmean](algorithms/arrays/trimmean.py) + - [top_1](algorithms/arrays/top_1.py) - [two_sum：两数和](algorithms/arrays/two_sum.py) - [move_zeros: 0后置问题](algorithms/arrays/move_zeros.py) - [backtrack：回溯](algorithms/backtrack) diff --git a/README_GE.md b/README_GE.md index afdcc322d..f0a48ca9b 100644 --- a/README_GE.md +++ b/README_GE.md @@ -75,6 +75,8 @@ Um das Projekt zu deinstallieren tippen Sie folgendes:    - [rotate](algorithms/arrays/rotate.py) - [summarize_ranges](algorithms/arrays/summarize_ranges.py) - [three_sum](algorithms/arrays/three_sum.py) + - [trimmean](algorithms/arrays/trimmean.py) + - [top_1](algorithms/arrays/top_1.py) - [two_sum](algorithms/arrays/two_sum.py) - [move_zeros](algorithms/arrays/move_zeros.py) - [backtrack](algorithms/backtrack) diff --git a/README_JP.md b/README_JP.md index d3603b76f..d50f01253 100644 --- a/README_JP.md +++ b/README_JP.md @@ -69,6 +69,8 @@ if __name__ == "__main__":    - [rotate](algorithms/arrays/rotate.py) - [summarize_ranges](algorithms/arrays/summarize_ranges.py) - [three_sum](algorithms/arrays/three_sum.py) + - [trimmean](algorithms/arrays/trimmean.py) + - [top_1](algorithms/arrays/top_1.py) - [two_sum](algorithms/arrays/two_sum.py) - [move_zeros](algorithms/arrays/move_zeros.py) - [backtrack : バックトラッキング](algorithms/backtrack) diff --git a/README_KR.md b/README_KR.md index e5b528389..dd78fa0d9 100644 --- a/README_KR.md +++ b/README_KR.md @@ -68,6 +68,8 @@ if __name__ == "__main__":    - [rotate](algorithms/arrays/rotate.py) - [summarize_ranges](algorithms/arrays/summarize_ranges.py) - [three_sum](algorithms/arrays/three_sum.py) + - [trimmean](algorithms/arrays/trimmean.py) + - [top_1](algorithms/arrays/top_1.py) - [two_sum](algorithms/arrays/two_sum.py) - [move_zeros](algorithms/arrays/move_zeros.py) - [backtrack : 백트래킹](algorithms/backtrack) diff --git a/algorithms/arrays/__init__.py b/algorithms/arrays/__init__.py index 64ba13065..7e57f6376 100644 --- a/algorithms/arrays/__init__.py +++ b/algorithms/arrays/__init__.py @@ -11,4 +11,6 @@ from .rotate import * from .summarize_ranges import * from .three_sum import * +from .trimmean import * +from .top_1 import * from .two_sum import * diff --git a/algorithms/arrays/top_1.py b/algorithms/arrays/top_1.py new file mode 100644 index 000000000..dea9aa2f9 --- /dev/null +++ b/algorithms/arrays/top_1.py @@ -0,0 +1,32 @@ +""" +this algorithms receive array and check most_frequent_value(a.k.a mode). Also, sometimes it can be have numerous most_frequent_value, +so this funtion returns list. This result can be used as finding representative value on array. + +This algorithms get array, and make dictionary of it, find most frequent count, and make result list. + +For example) top_1([1, 1, 2, 2, 3, 4]) will return [1, 2] + +Complexity: O(n) +""" +def top_1(arr): + values = {} + #reserve each value which first appears on keys + #reserve how many time each value appears by index number on values + result = [] + f_val = 0 + + for i in arr: + if i in values: + values[i] += 1 + else: + values[i] = 1 + + f_val = max(values.values()) + + for i in values.keys(): + if values[i] == f_val: + result.append(i) + else: + continue + + return result diff --git a/algorithms/arrays/trimmean.py b/algorithms/arrays/trimmean.py new file mode 100644 index 000000000..4cea0db74 --- /dev/null +++ b/algorithms/arrays/trimmean.py @@ -0,0 +1,22 @@ +""" +When make reliable means, we need to neglect best and worst value. For example, when making average score on athletes we need this option. +So, this algorithms, fix some percentage to neglect when making mean. For example, if you suggest 20%, it will neglect best 10% value, and +worst 10% value. + +This algorithm gets array and percentage to neglect. After sorted, if index of array is larger or smaller or wanted ratio, we don't +compute it. + +Compleity: O(n) +""" +def trimmean(arr, per): + ratio = per/200 + # /100 for easy calculation by *, and /2 for easy adaption to best and worst parts. + cal_sum = 0 + # sum value to be calculated to trimmean. + arr.sort() + neg_val = int(len(arr)*ratio) + arr = arr[neg_val:len(arr)-neg_val] + for i in arr: + cal_sum += i + #print(cal_sum, len(arr)) + return cal_sum/len(arr) diff --git a/tests/test_array.py b/tests/test_array.py index ed398bca7..e3f6f6d7b 100644 --- a/tests/test_array.py +++ b/tests/test_array.py @@ -12,7 +12,9 @@ summarize_ranges, three_sum, two_sum, - max_ones_index + max_ones_index, + trimmean, + top_1 ) import unittest @@ -306,6 +308,20 @@ def test_two_sum(self): self.assertTupleEqual((0, 3), two_sum([-3, 5, 2, 3, 8, -9], target=0)) self.assertIsNone(two_sum([-3, 5, 2, 3, 8, -9], target=6)) + +class TestTrimmean(unittest.TestCase): + + def test_trimmean(self): + + self.assertEqual(trimmean([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], 20), 5.5) + self.assertEqual(trimmean([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11], 20), 6.0) + +class TestTop1(unittest.TestCase): + + def test_top_1(self): + self.assertListEqual(top_1([1 , 1, 2, 2, 3]), [1, 2]) + self.assertListEqual(top_1([1, 2, 3, 324, 234, 23, 23, 1, 23, 23]), [23]) + if __name__ == '__main__': From 3d1956dc2fc6484701f5abaead8afa8092d4d805 Mon Sep 17 00:00:00 2001 From: Lee Geon Date: Mon, 11 Jun 2018 02:37:21 +0900 Subject: [PATCH 348/387] Created check_bipartite.py in algorithms/graph + test cases (#347) * Update __init__.py * Update test_graph.py * Create check_bipartite.py * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md * Update check_bipartite.py * Update check_bipartite.py --- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 1 + algorithms/graph/__init__.py | 1 + algorithms/graph/check_bipartite.py | 39 +++++++++++++++++++++++++++++ tests/test_graph.py | 15 +++++++++++ 8 files changed, 60 insertions(+) create mode 100644 algorithms/graph/check_bipartite.py diff --git a/README.md b/README.md index 18858ce8e..0ccc81e6d 100644 --- a/README.md +++ b/README.md @@ -139,6 +139,7 @@ If you want to uninstall algorithms, it is as simple as: - [word_break](algorithms/dp/word_break.py) - [fibonacci](algorithms/dp/fib.py) - [graph](algorithms/graph) + - [check_bipartite](algorithms/graph/check_bipartite.py) - [strongly_connected](algorithms/graph/checkDiGraphStronglyConnected.py) - [clone_graph](algorithms/graph/clone_graph.py) - [cycle_detection](algorithms/graph/cycle_detection.py) diff --git a/README_CN.md b/README_CN.md index db759e9f0..7a791bbee 100644 --- a/README_CN.md +++ b/README_CN.md @@ -142,6 +142,7 @@ pip3 uninstall -y algorithms - [regex_matching：正则匹配](algorithms/dp/regex_matching.py) - [word_break：单词分割](algorithms/dp/word_break.py) - [graph：图](graph) + - [check_bipartite](algorithms/graph/check_bipartite.py) - [2-sat：2-sat](algorithms/graph/satisfiability.py) - [clone_graph：克隆图](algorithms/graph/clone_graph.py) - [cycle_detection：判断圈算法](algorithms/graph/cycle_detection.py) diff --git a/README_GE.md b/README_GE.md index f0a48ca9b..1f6c5b32a 100644 --- a/README_GE.md +++ b/README_GE.md @@ -146,6 +146,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [word_break](algorithms/dp/word_break.py) - [fibonacci](algorithms/dp/fib.py) - [graph](algorithms/graph) + - [check_bipartite](algorithms/graph/check_bipartite.py) - [strongly_connected](algorithms/graph/checkDiGraphStronglyConnected.py) - [clone_graph](algorithms/graph/clone_graph.py) - [cycle_detection](algorithms/graph/cycle_detection.py) diff --git a/README_JP.md b/README_JP.md index d50f01253..1e0a2d2b0 100644 --- a/README_JP.md +++ b/README_JP.md @@ -140,6 +140,7 @@ if __name__ == "__main__": - [word_break](algorithms/dp/word_break.py) - [fibonacci](algorithms/dp/fib.py) - [graph : グラフ](algorithms/graph) + - [check_bipartite](algorithms/graph/check_bipartite.py) - [strongly_connected](algorithms/graph/checkDiGraphStronglyConnected.py) - [clone_graph](algorithms/graph/clone_graph.py) - [cycle_detection](algorithms/graph/cycle_detection.py) diff --git a/README_KR.md b/README_KR.md index dd78fa0d9..ff96562c0 100644 --- a/README_KR.md +++ b/README_KR.md @@ -137,6 +137,7 @@ if __name__ == "__main__": - [word_break](algorithms/dp/word_break.py) - [fibonacci](algorithms/dp/fib.py) - [graph : 그래프](algorithms/graph) + - [check_bipartite](algorithms/graph/check_bipartite.py) - [strongly_connected](algorithms/graph/checkDiGraphStronglyConnected.py) - [clone_graph](algorithms/graph/clone_graph.py) - [cycle_detection](algorithms/graph/cycle_detection.py) diff --git a/algorithms/graph/__init__.py b/algorithms/graph/__init__.py index bfb208eb0..f94f12c5c 100644 --- a/algorithms/graph/__init__.py +++ b/algorithms/graph/__init__.py @@ -1 +1,2 @@ from .tarjan import * +from .check_bipartite import * diff --git a/algorithms/graph/check_bipartite.py b/algorithms/graph/check_bipartite.py new file mode 100644 index 000000000..dacc003b3 --- /dev/null +++ b/algorithms/graph/check_bipartite.py @@ -0,0 +1,39 @@ +""" + +Bipartite graph is a graph whose vertices can be divided into two disjoint and independent sets. +(https://en.wikipedia.org/wiki/Bipartite_graph) + +Time complexity is O(|E|) +Space complexity is O(|V|) + +""" + +def check_bipartite(adj_list): + + V = len(adj_list) + + # Divide vertexes in the graph into set_type 1 and 2 + # Initialize all set_types as -1 + set_type = [-1 for v in range(V)] + set_type[0] = 0 + + q = [0] + + while q: + v = q.pop(0) + + # If there is a self-loop, it cannot be bipartite + if adj_list[v][v]: + return False + + for u in range(V): + if adj_list[v][u]: + if set_type[u] == set_type[v]: + return False + elif set_type[u] == -1: + # set type of u opposite of v + set_type[u] = 1 - set_type[v] + q.append(u) + + return True + diff --git a/tests/test_graph.py b/tests/test_graph.py index 63937db0e..d402b86fa 100644 --- a/tests/test_graph.py +++ b/tests/test_graph.py @@ -1,4 +1,5 @@ from algorithms.graph import Tarjan +from algorithms.graph import check_bipartite import unittest @@ -42,3 +43,17 @@ def test_tarjan_example_2(self): g = Tarjan(example) self.assertEqual(g.sccs, [['A', 'B', 'E'], ['C', 'D'], ['F', 'G'], ['H']]) + + +class TestCheckBipartite(unittest.TestCase): + + def test_check_bipartite(self): + + adj_list_1 = [[0, 0, 1], [0, 0, 1], [1, 1, 0]] + self.assertEqual(True, check_bipartite(adj_list_1)) + + adj_list_2 = [[0, 1, 0, 1], [1, 0, 1, 0], [0, 1, 0, 1], [1, 0, 1, 0]] + self.assertEqual(True, check_bipartite(adj_list_2)) + + adj_list_3 = [[0, 1, 0, 0], [1, 0, 1, 1], [0, 1, 0, 1], [0, 1, 1, 0]] + self.assertEqual(False, check_bipartite(adj_list_3)) From 1ac287f4a84cc75950955f2b512c75884669083a Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Sun, 10 Jun 2018 23:25:31 +0530 Subject: [PATCH 349/387] refactor PriorityQueue and tests (#348) --- algorithms/queues/priority_queue.py | 73 ++++++++++++++++++----------- tests/test_queues.py | 37 +++++++-------- 2 files changed, 63 insertions(+), 47 deletions(-) diff --git a/algorithms/queues/priority_queue.py b/algorithms/queues/priority_queue.py index a28ae9697..76b08156e 100644 --- a/algorithms/queues/priority_queue.py +++ b/algorithms/queues/priority_queue.py @@ -3,37 +3,54 @@ Insertion - O(n) Extract min/max Node - O(1) """ -import collections +import itertools class PriorityQueueNode: - def __init__(self, data, priority): - self.data = data - self.priority = priority + def __init__(self, data, priority): + self.data = data + self.priority = priority + + def __repr__(self): + return "{}: {}".format(self.data, self.priority) - def __repr__(self): - return str(self.data) + ": " + str(self.priority) class PriorityQueue: - def __init__(self): - self.priority_queue_list = collections.deque() - - def __repr__(self): - return "PriorityQueue({!r})".format(list(self.priority_queue_list)) - - def size(self): - return len(self.priority_queue_list) - - def push(self, item, priority=None): - priority = item if priority is None else priority - node = PriorityQueueNode(item, priority) - for index, current in enumerate(self.priority_queue_list): - if current.priority > node.priority: - self.priority_queue_list.insert(index, node) - return - # when traversed complete queue - self.priority_queue_list.append(node) - - def pop(self): - # remove and return the first node from the queue - return self.priority_queue_list.popleft() + def __init__(self, items=None, priorities=None): + """Create a priority queue with items (list or iterable). + If items is not passed, create empty priority queue.""" + self.priority_queue_list = [] + if items is None: + return + if priorities is None: + priorities = itertools.repeat(None) + for item, priority in zip(items, priorities): + self.push(item, priority=priority) + + def __repr__(self): + return "PriorityQueue({!r})".format(self.priority_queue_list) + + def size(self): + """Return size of the priority queue. + """ + return len(self.priority_queue_list) + + def push(self, item, priority=None): + """Push the item in the priority queue. + if priority is not given, priority is set to the value of item. + """ + priority = item if priority is None else priority + node = PriorityQueueNode(item, priority) + for index, current in enumerate(self.priority_queue_list): + if current.priority < node.priority: + self.priority_queue_list.insert(index, node) + return + # when traversed complete queue + self.priority_queue_list.append(node) + + def pop(self): + """Remove and return the item with the lowest priority. + """ + # remove and return the first node from the queue + return self.priority_queue_list.pop().data + diff --git a/tests/test_queues.py b/tests/test_queues.py index 2c85c4508..b5b49ef61 100644 --- a/tests/test_queues.py +++ b/tests/test_queues.py @@ -1,11 +1,12 @@ +import unittest + from algorithms.queues import ( ArrayQueue, LinkedListQueue, max_sliding_window, reconstruct_queue, - PriorityQueue, PriorityQueueNode + PriorityQueue ) -import unittest class TestQueue(unittest.TestCase): """ @@ -70,10 +71,9 @@ def test_LinkedListQueue(self): self.assertTrue(queue.is_empty()) -class TestSuite(unittest.TestCase): +class TestSuite(unittest.TestCase): def test_max_sliding_window(self): - array = [1, 3, -1, -3, 5, 3, 6, 7] self.assertEqual(max_sliding_window(array, k=5), [5, 5, 6, 7]) self.assertEqual(max_sliding_window(array, k=3), [3, 3, 5, 5, 6, 7]) @@ -85,24 +85,23 @@ def test_max_sliding_window(self): self.assertEqual(max_sliding_window(array, k=2), [8, 10, 10, 9, 9, 15, 15, 90, 90]) def test_reconstruct_queue(self): - self.assertEqual([[5,0], [7,0], [5,2], [6,1], [4,4], [7,1]], - reconstruct_queue([[7,0], [4,4], [7,1], [5,0], [6,1], [5,2]])) + self.assertEqual([[5, 0], [7, 0], [5, 2], [6, 1], [4, 4], [7, 1]], + reconstruct_queue([[7, 0], [4, 4], [7, 1], [5, 0], [6, 1], [5, 2]])) -""" - TODO: Refactor PriorityQueue because insert method does not work for python3.4 -class TestPriorityQueue(unittest.TestCase): - Test suite for the PriorityQueue data structures. +class TestPriorityQueue(unittest.TestCase): + """Test suite for the PriorityQueue data structures. + """ def test_PriorityQueue(self): - queue = PriorityQueue() - queue.push(3) - queue.push(4) - queue.push(1) - queue.push(6) - self.assertEqual(4,queue.size()) - self.assertEqual(str(1) + ": " + str(1),str(queue.pop())) -""" -if __name__ == "__main__": + queue = PriorityQueue([3, 4, 1, 6]) + self.assertEqual(4, queue.size()) + self.assertEqual(1, queue.pop()) + self.assertEqual(3, queue.size()) + queue.push(2) + self.assertEqual(4, queue.size()) + self.assertEqual(2, queue.pop()) + +if __name__ == "__main__": unittest.main() From d4ec1edc38338bf101708e453e1ae657e2d1a02a Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Sun, 10 Jun 2018 13:45:46 -0700 Subject: [PATCH 350/387] added some path problems in new algorithms/unix/ (#344) * Add join_with_slash.py to Unix * Add full_path.py to Unix * Add split.py to Unix --- README.md | 5 ++++ algorithms/unix/__init__.py | 3 +++ algorithms/unix/path/full_path.py | 6 +++++ algorithms/unix/path/join_with_slash.py | 18 +++++++++++++ algorithms/unix/path/split.py | 23 ++++++++++++++++ tests/test_unix.py | 35 +++++++++++++++++++++++++ 6 files changed, 90 insertions(+) create mode 100644 algorithms/unix/__init__.py create mode 100644 algorithms/unix/path/full_path.py create mode 100644 algorithms/unix/path/join_with_slash.py create mode 100644 algorithms/unix/path/split.py create mode 100644 tests/test_unix.py diff --git a/README.md b/README.md index 0ccc81e6d..599378ebf 100644 --- a/README.md +++ b/README.md @@ -328,6 +328,11 @@ If you want to uninstall algorithms, it is as simple as: - [pretty_print](algorithms/tree/pretty_print.py) - [same_tree](algorithms/tree/same_tree.py) - [tree](algorithms/tree/tree.py) +- [unix](algorithms/unix) + - [path](algorithms/unix/path/) + - [join_with_slash](algorithms/unix/path/join_with_slash.py) + - [full_path](algorithms/unix/path/full_path.py) + - [split](algorithms/unix/path/split.py) - [union-find](algorithms/union-find) - [count_islands](algorithms/union-find/count_islands.py) diff --git a/algorithms/unix/__init__.py b/algorithms/unix/__init__.py new file mode 100644 index 000000000..68b785c97 --- /dev/null +++ b/algorithms/unix/__init__.py @@ -0,0 +1,3 @@ +from .path.join_with_slash import * +from .path.full_path import * +from .path.split import * diff --git a/algorithms/unix/path/full_path.py b/algorithms/unix/path/full_path.py new file mode 100644 index 000000000..3bf109e12 --- /dev/null +++ b/algorithms/unix/path/full_path.py @@ -0,0 +1,6 @@ +""" +Get a full absolute path a file +""" +import os +def full_path(file): + return os.path.abspath(os.path.expanduser(file)) diff --git a/algorithms/unix/path/join_with_slash.py b/algorithms/unix/path/join_with_slash.py new file mode 100644 index 000000000..beec8d106 --- /dev/null +++ b/algorithms/unix/path/join_with_slash.py @@ -0,0 +1,18 @@ +""" +Both URL and file path joins use slashes as dividers between their parts. +For example: + +path/to/dir + file --> path/to/dir/file +path/to/dir/ + file --> path/to/dir/file +http://algorithms.com/ + part --> http://algorithms.com/part +http://algorithms.com + part --> http://algorithms/part +""" +import os + +def join_with_slash(base, suffix): + # Remove / trailing + base = base.rstrip('/') + # Remove / leading + suffix = suffix.lstrip('/').rstrip() + full_path = "{}/{}".format(base, suffix) + return full_path diff --git a/algorithms/unix/path/split.py b/algorithms/unix/path/split.py new file mode 100644 index 000000000..168b12057 --- /dev/null +++ b/algorithms/unix/path/split.py @@ -0,0 +1,23 @@ +""" +Splitting a path into 2 parts +Example: +Input: https://algorithms/unix/test.py (for url) +Output: + part[0]: https://algorithms/unix + part[1]: test.py + +Input: algorithms/unix/test.py (for file path) +Output: + part[0]: algorithms/unix + part[1]: test.py +""" +import os + +def split(path): + parts = [] + split_part = path.rpartition('/') + # Takt the origin path without the last part + parts.append(split_part[0]) + # Take the last element of list + parts.append(split_part[2]) + return parts diff --git a/tests/test_unix.py b/tests/test_unix.py new file mode 100644 index 000000000..a24388970 --- /dev/null +++ b/tests/test_unix.py @@ -0,0 +1,35 @@ +from algorithms.unix import ( + join_with_slash, + full_path, + split +) +import os +import unittest +class TestUnixPath(unittest.TestCase): + def test_join_with_slash(self): + self.assertEqual("path/to/dir/file", join_with_slash("path/to/dir/", "file")) + self.assertEqual("path/to/dir/file", join_with_slash("path/to/dir", "file")) + self.assertEqual("http://algorithms/part", join_with_slash("http://algorithms", "part")) + self.assertEqual("http://algorithms/part", join_with_slash("http://algorithms/", "part")) + + def test_full_path(self): + file_name = "file_name" + # Test full path relative + expect_path = "{}/{}".format(os.getcwd(), file_name) + self.assertEqual(expect_path, full_path(file_name)) + # Test full path with expanding user + # ~/file_name + expect_path = "{}/{}".format(os.path.expanduser('~'), file_name) + self.assertEqual(expect_path, full_path("~/{}".format(file_name))) + + def test_split(self): + # Test url path + path = "https://algorithms/unix/test.py" + expect_result = split(path) + self.assertEqual("https://algorithms/unix", expect_result[0]) + self.assertEqual("test.py", expect_result[1]) + # Test file path + path = "algorithms/unix/test.py" + expect_result = split(path) + self.assertEqual("algorithms/unix", expect_result[0]) + self.assertEqual("test.py", expect_result[1]) From 7a21ac55c064dccbb6dfdb29cea4c36c05cbfa1c Mon Sep 17 00:00:00 2001 From: Lee Geon Date: Mon, 11 Jun 2018 05:47:38 +0900 Subject: [PATCH 351/387] Created Preorder & Postorder traversals in tree (#346) * Create postorder.py * Create preorder.py * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md * Update inorder.py * Update postorder.py * Update preorder.py * Create __init__.py * Update preorder.py * Update postorder.py * Create test_tree.py * Update test_tree.py * Update __init__.py * Update __init__.py * Update test_tree.py --- README.md | 2 ++ README_CN.md | 2 ++ README_GE.md | 2 ++ README_JP.md | 2 ++ README_KR.md | 2 ++ algorithms/tree/traversal/__init__.py | 2 ++ algorithms/tree/traversal/inorder.py | 4 +++ algorithms/tree/traversal/postorder.py | 41 +++++++++++++++++++++++ algorithms/tree/traversal/preorder.py | 38 +++++++++++++++++++++ tests/test_tree.py | 46 ++++++++++++++++++++++++++ 10 files changed, 141 insertions(+) create mode 100644 algorithms/tree/traversal/__init__.py create mode 100644 algorithms/tree/traversal/postorder.py create mode 100644 algorithms/tree/traversal/preorder.py create mode 100644 tests/test_tree.py diff --git a/README.md b/README.md index 599378ebf..d85ec4429 100644 --- a/README.md +++ b/README.md @@ -307,6 +307,8 @@ If you want to uninstall algorithms, it is as simple as: - [traversal](algorithms/tree/traversal) - [inorder](algorithms/tree/traversal/inorder.py) - [level_order](algorithms/tree/traversal/level_order.py) + - [postorder](algorithms/tree/traversal/postorder.py) + - [preorder](algorithms/tree/traversal/preorder.py) - [zigzag](algorithms/tree/traversal/zigzag.py) - [trie](algorithms/tree/trie) - [add_and_search](algorithms/tree/trie/add_and_search.py) diff --git a/README_CN.md b/README_CN.md index 7a791bbee..b675f6f6a 100644 --- a/README_CN.md +++ b/README_CN.md @@ -291,6 +291,8 @@ pip3 uninstall -y algorithms - [traversal：遍历](algorithms/tree/traversal) - [inorder：中序遍历](algorithms/tree/traversal/inorder.py) - [level_order：层次遍历](algorithms/tree/traversal/level_order.py) + - [postorder](algorithms/tree/traversal/postorder.py) + - [preorder](algorithms/tree/traversal/preorder.py) - [zigzag：锯齿形遍历](algorithms/tree/traversal/zigzag.py) - [tree：树](algorithms/tree/tree.py) - [trie：字典树](algorithms/tree/trie) diff --git a/README_GE.md b/README_GE.md index 1f6c5b32a..e21dca321 100644 --- a/README_GE.md +++ b/README_GE.md @@ -313,6 +313,8 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [traversal](algorithms/tree/traversal) - [inorder](algorithms/tree/traversal/inorder.py) - [level_order](algorithms/tree/traversal/level_order.py) + - [postorder](algorithms/tree/traversal/postorder.py) + - [preorder](algorithms/tree/traversal/preorder.py) - [zigzag](algorithms/tree/traversal/zigzag.py) - [trie](algorithms/tree/trie) - [add_and_search](algorithms/tree/trie/add_and_search.py) diff --git a/README_JP.md b/README_JP.md index 1e0a2d2b0..636d79f60 100644 --- a/README_JP.md +++ b/README_JP.md @@ -307,6 +307,8 @@ if __name__ == "__main__": - [traversal](algorithms/tree/traversal) - [inorder](algorithms/tree/traversal/inorder.py) - [level_order](algorithms/tree/traversal/level_order.py) + - [postorder](algorithms/tree/traversal/postorder.py) + - [preorder](algorithms/tree/traversal/preorder.py) - [zigzag](algorithms/tree/traversal/zigzag.py) - [trie](algorithms/tree/trie) - [add_and_search](algorithms/tree/trie/add_and_search.py) diff --git a/README_KR.md b/README_KR.md index ff96562c0..b38cdd4cb 100644 --- a/README_KR.md +++ b/README_KR.md @@ -302,6 +302,8 @@ if __name__ == "__main__": - [traversal : 트리 순회](algorithms/tree/traversal) - [inorder](algorithms/tree/traversal/inorder.py) - [level_order](algorithms/tree/traversal/level_order.py) + - [postorder](algorithms/tree/traversal/postorder.py) + - [preorder](algorithms/tree/traversal/preorder.py) - [zigzag](algorithms/tree/traversal/zigzag.py) - [trie : 트라이](algorithms/tree/trie) - [add_and_search](algorithms/tree/trie/add_and_search.py) diff --git a/algorithms/tree/traversal/__init__.py b/algorithms/tree/traversal/__init__.py new file mode 100644 index 000000000..df3c88c05 --- /dev/null +++ b/algorithms/tree/traversal/__init__.py @@ -0,0 +1,2 @@ +from .preorder import * +from .postorder import * diff --git a/algorithms/tree/traversal/inorder.py b/algorithms/tree/traversal/inorder.py index 4883c0f4f..17cadaf95 100644 --- a/algorithms/tree/traversal/inorder.py +++ b/algorithms/tree/traversal/inorder.py @@ -1,3 +1,7 @@ +''' +Time complexity : O(n) +''' + class Node: def __init__(self, val, left=None, right=None): diff --git a/algorithms/tree/traversal/postorder.py b/algorithms/tree/traversal/postorder.py new file mode 100644 index 000000000..b89293bba --- /dev/null +++ b/algorithms/tree/traversal/postorder.py @@ -0,0 +1,41 @@ +''' +Time complexity : O(n) +''' + +class Node: + + def __init__(self, val, left=None, right=None): + self.val = val + self.left = left + self.right = right + + +def postorder(root): + res_temp = [] + res = [] + if not root: + return res + stack = [] + stack.append(root) + while stack: + root = stack.pop() + res_temp.append(root.val) + if root.left: + stack.append(root.left) + if root.right: + stack.append(root.right) + while res_temp: + res.append(res_temp.pop()) + return res + +# Recursive Implementation +def postorder_rec(root, res=None): + if root is None: + return [] + if res is None: + res = [] + postorder_rec(root.left, res) + postorder_rec(root.right, res) + res.append(root.val) + return res + diff --git a/algorithms/tree/traversal/preorder.py b/algorithms/tree/traversal/preorder.py new file mode 100644 index 000000000..45346ba87 --- /dev/null +++ b/algorithms/tree/traversal/preorder.py @@ -0,0 +1,38 @@ +''' +Time complexity : O(n) +''' + +class Node: + + def __init__(self, val, left=None, right=None): + self.val = val + self.left = left + self.right = right + + +def preorder(root): + res = [] + if not root: + return res + stack = [] + stack.append(root) + while stack: + root = stack.pop() + res.append(root.val) + if root.right: + stack.append(root.right) + if root.left: + stack.append(root.left) + return res + +# Recursive Implementation +def preorder_rec(root, res=None): + if root is None: + return [] + if res is None: + res = [] + res.append(root.val) + preorder_rec(root.left, res) + preorder_rec(root.right, res) + return res + diff --git a/tests/test_tree.py b/tests/test_tree.py new file mode 100644 index 000000000..a9d53ca6d --- /dev/null +++ b/tests/test_tree.py @@ -0,0 +1,46 @@ +from algorithms.tree.traversal import ( + preorder, + preorder_rec, + postorder, + postorder_rec +) + +import unittest + +class Node: + + def __init__(self, val, left=None, right=None): + self.val = val + self.left = left + self.right = right + + +class TestTraversal(unittest.TestCase): + + def test_preorder(self): + n1 = Node(100) + n2 = Node(50) + n3 = Node(150) + n4 = Node(25) + n5 = Node(75) + n6 = Node(125) + n7 = Node(175) + n1.left, n1.right = n2, n3 + n2.left, n2.right = n4, n5 + n3.left, n3.right = n6, n7 + self.assertEqual([100, 50, 25, 75, 150, 125, 175], preorder(n1)) + self.assertEqual([100, 50, 25, 75, 150, 125, 175], preorder_rec(n1)) + + def test_postorder(self): + n1 = Node(100) + n2 = Node(50) + n3 = Node(150) + n4 = Node(25) + n5 = Node(75) + n6 = Node(125) + n7 = Node(175) + n1.left, n1.right = n2, n3 + n2.left, n2.right = n4, n5 + n3.left, n3.right = n6, n7 + self.assertEqual([25, 75, 50, 125, 175, 150, 100], postorder(n1)) + self.assertEqual([25, 75, 50, 125, 175, 150, 100], postorder_rec(n1)) From 89c1daaf04ff893ddad7e3d936c2ab3456abdbc6 Mon Sep 17 00:00:00 2001 From: hsi1032 Date: Mon, 11 Jun 2018 05:49:33 +0900 Subject: [PATCH 352/387] added simulation code in quick_sort and heap_sort (#342) * Update quick_sort.py * Update heap_sort.py * Update heap_sort.py * Update quick_sort.py * Update heap_sort.py * Update quick_sort.py --- algorithms/sort/heap_sort.py | 39 +++++++++++++++++++++++++---------- algorithms/sort/quick_sort.py | 22 +++++++++++++------- 2 files changed, 43 insertions(+), 18 deletions(-) diff --git a/algorithms/sort/heap_sort.py b/algorithms/sort/heap_sort.py index 6c91cee90..ec4c7fa2b 100644 --- a/algorithms/sort/heap_sort.py +++ b/algorithms/sort/heap_sort.py @@ -1,17 +1,21 @@ -def max_heap_sort(arr): +def max_heap_sort(arr, simulation=False): """ Heap Sort that uses a max heap to sort an array in ascending order Complexity: O(n log(n)) """ + iteration = 0 + if simulation: + print("iteration",iteration,":",*arr) + for i in range(len(arr) - 1, 0, -1): - max_heapify(arr, i) + iteration = max_heapify(arr, i, simulation, iteration) - temp = arr[0] - arr[0] = arr[i] - arr[i] = temp + if simulation: + iteration = iteration + 1 + print("iteration",iteration,":",*arr) return arr -def max_heapify(arr, end): +def max_heapify(arr, end, simulation, iteration): """ Max heapify helper for max_heap_sort """ last_parent = (end - 1) // 2 @@ -31,21 +35,30 @@ def max_heapify(arr, end): if arr[child] > arr[current_parent]: arr[current_parent], arr[child] = arr[child], arr[current_parent] current_parent = child + if simulation: + iteration = iteration + 1 + print("iteration",iteration,":",*arr) # If no swap occured, no need to keep iterating else: break + arr[0], arr[end] = arr[end], arr[0] + return iteration - -def min_heap_sort(arr): +def min_heap_sort(arr, simulation=False): """ Heap Sort that uses a min heap to sort an array in ascending order Complexity: O(n log(n)) """ + iteration = 0 + if simulation: + print("iteration",iteration,":",*arr) + for i in range(0, len(arr) - 1): - min_heapify(arr, i) + iteration = min_heapify(arr, i, simulation, iteration) + return arr -def min_heapify(arr, start): +def min_heapify(arr, start, simulation, iteration): """ Min heapify helper for min_heap_sort """ # Offset last_parent by the start (last_parent calculated as if start index was 0) @@ -64,12 +77,16 @@ def min_heapify(arr, start): if child + 1 <= end - start and arr[child + start] > arr[ child + 1 + start]: child = child + 1 - + # Swap if child is less than parent if arr[child + start] < arr[current_parent + start]: arr[current_parent + start], arr[child + start] = \ arr[child + start], arr[current_parent + start] current_parent = child + if simulation: + iteration = iteration + 1 + print("iteration",iteration,":",*arr) # If no swap occured, no need to keep iterating else: break + return iteration diff --git a/algorithms/sort/quick_sort.py b/algorithms/sort/quick_sort.py index a262bb4c1..10794e7a5 100644 --- a/algorithms/sort/quick_sort.py +++ b/algorithms/sort/quick_sort.py @@ -1,18 +1,26 @@ -def quick_sort(arr): +def quick_sort(arr, simulation=False): """ Quick sort Complexity: best O(n log(n)) avg O(n log(n)), worst O(N^2) """ - return quick_sort_recur(arr, 0, len(arr) - 1) - + + iteration = 0 + if simulation: + print("iteration",iteration,":",*arr) + arr, _ = quick_sort_recur(arr, 0, len(arr) - 1, iteration, simulation) + return arr -def quick_sort_recur(arr, first, last): +def quick_sort_recur(arr, first, last, iteration, simulation): if first < last: pos = partition(arr, first, last) # Start our two recursive calls - quick_sort_recur(arr, first, pos - 1) - quick_sort_recur(arr, pos + 1, last) - return arr + if simulation: + iteration = iteration + 1 + print("iteration",iteration,":",*arr) + + _, iteration = quick_sort_recur(arr, first, pos - 1, iteration, simulation) + _, iteration = quick_sort_recur(arr, pos + 1, last, iteration, simulation) + return arr, iteration def partition(arr, first, last): wall = first From 5fd35cad82ca009395aef07a38d2afc483353845 Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Tue, 12 Jun 2018 19:51:34 +0530 Subject: [PATCH 353/387] remove `tests/*` from MANIFEST.in (#354) - fix #350 --- MANIFEST.in | 1 - 1 file changed, 1 deletion(-) diff --git a/MANIFEST.in b/MANIFEST.in index daf8a5200..50af9b9c9 100644 --- a/MANIFEST.in +++ b/MANIFEST.in @@ -1,4 +1,3 @@ include README.md include LICENSE include algorithms/* -include tests/* From 2f361dd92e83768df85a14e3147e6aa6f770150e Mon Sep 17 00:00:00 2001 From: aig031 <31883686+aig031@users.noreply.github.com> Date: Thu, 14 Jun 2018 04:33:01 +0900 Subject: [PATCH 354/387] created limit.py in /algorithms/arrays (#353) * Create top_1.py * Create trimmean.py * Rename top_1.py to algorithms/arrays/top_1.py * Rename trimmean.py to algorithms/arrays/trimmean.py * Update __init__.py * Update README.md * Update README_CN.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md * Update test_array.py * Update test_array.py * Update test_array.py * Create limit.py * Update __init__.py * Update test_array.py * Update README.md * Update README_CN.md * Update README_GE.md * Update README_JP.md * Update README_KR.md * Update test_array.py * Update limit.py * Update test_array.py --- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 1 + algorithms/arrays/__init__.py | 1 + algorithms/arrays/limit.py | 30 ++++++++++++++++++++++++++++++ tests/test_array.py | 11 ++++++++++- 8 files changed, 46 insertions(+), 1 deletion(-) create mode 100644 algorithms/arrays/limit.py diff --git a/README.md b/README.md index d85ec4429..c03beceda 100644 --- a/README.md +++ b/README.md @@ -60,6 +60,7 @@ If you want to uninstall algorithms, it is as simple as: - [flatten](algorithms/arrays/flatten.py) - [garage](algorithms/arrays/garage.py) - [josephus_problem](algorithms/arrays/josephus.py) + - [limit](algorithms/arrays/limit.py) - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) - [max_ones_index](algorithms/arrays/max_ones_index.py) - [merge_intervals](algorithms/arrays/merge_intervals.py) diff --git a/README_CN.md b/README_CN.md index b675f6f6a..42f7b36d0 100644 --- a/README_CN.md +++ b/README_CN.md @@ -78,6 +78,7 @@ pip3 uninstall -y algorithms - [garage：停车场](algorithms/arrays/garage.py) - [josephus_problem: 约瑟夫问题](algorithms/arrays/josephus.py) - [max_ones_index](algorithms/arrays/max_ones_index.py) + - [limit](algorithms/arrays/limit.py) - [longest_non_repeat：最长不重复子串](algorithms/arrays/longest_non_repeat.py/) - [merge_intervals：合并重叠间隔](algorithms/arrays/merge_intervals.py) - [missing_ranges：遗失的范围](algorithms/arrays/missing_ranges.py) diff --git a/README_GE.md b/README_GE.md index e21dca321..f9f475709 100644 --- a/README_GE.md +++ b/README_GE.md @@ -67,6 +67,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [flatten](algorithms/arrays/flatten.py) - [garage](algorithms/arrays/garage.py) - [josephus_problem](algorithms/arrays/josephus.py) + - [limit](algorithms/arrays/limit.py) - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) - [max_ones_index](algorithms/arrays/max_ones_index.py) - [merge_intervals](algorithms/arrays/merge_intervals.py) diff --git a/README_JP.md b/README_JP.md index 636d79f60..571c70fe7 100644 --- a/README_JP.md +++ b/README_JP.md @@ -61,6 +61,7 @@ if __name__ == "__main__": - [flatten](algorithms/arrays/flatten.py) - [garage](algorithms/arrays/garage.py) - [josephus_problem](algorithms/arrays/josephus.py) + - [limit](algorithms/arrays/limit.py) - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) - [max_ones_index](algorithms/arrays/max_ones_index.py) - [merge_intervals](algorithms/arrays/merge_intervals.py) diff --git a/README_KR.md b/README_KR.md index b38cdd4cb..773babd94 100644 --- a/README_KR.md +++ b/README_KR.md @@ -60,6 +60,7 @@ if __name__ == "__main__": - [flatten](algorithms/arrays/flatten.py) - [garage](algorithms/arrays/garage.py) - [josephus_problem](algorithms/arrays/josephus.py) + - [limit](algorithms/arrays/limit.py) - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) - [max_ones_index](algorithms/arrays/max_ones_index.py) - [merge_intervals](algorithms/arrays/merge_intervals.py) diff --git a/algorithms/arrays/__init__.py b/algorithms/arrays/__init__.py index 7e57f6376..c0d8b8f23 100644 --- a/algorithms/arrays/__init__.py +++ b/algorithms/arrays/__init__.py @@ -14,3 +14,4 @@ from .trimmean import * from .top_1 import * from .two_sum import * +from .limit import * diff --git a/algorithms/arrays/limit.py b/algorithms/arrays/limit.py new file mode 100644 index 000000000..adcc57797 --- /dev/null +++ b/algorithms/arrays/limit.py @@ -0,0 +1,30 @@ +""" +Sometimes you need to limit array result to use. Such as you only need the value over +10 or, you need value under than 100. By use this algorithms, you can limit your array +to specific value + +If array, Min, Max value was given, it returns array that contains values of given array +which was larger than Min, and lower than Max. You need to give 'unlimit' to use only Min +or Max. + +ex) limit([1,2,3,4,5], None, 3) = [1,2,3] + +Complexity = O(n) +""" + +def limit(arr, min_lim = None, max_lim = None): + result = [] + if min_lim == None: + for i in arr: + if i<= max_lim: + result.append(i) + elif max_lim == None: + for i in arr: + if i >= min_lim: + result.append(i) + else: + for i in arr: + if i >= min_lim and i <= max_lim: + result.append(i) + + return result diff --git a/tests/test_array.py b/tests/test_array.py index e3f6f6d7b..6002adb43 100644 --- a/tests/test_array.py +++ b/tests/test_array.py @@ -14,7 +14,8 @@ two_sum, max_ones_index, trimmean, - top_1 + top_1, + limit ) import unittest @@ -322,6 +323,14 @@ def test_top_1(self): self.assertListEqual(top_1([1 , 1, 2, 2, 3]), [1, 2]) self.assertListEqual(top_1([1, 2, 3, 324, 234, 23, 23, 1, 23, 23]), [23]) +class TestLimit(unittest.TestCase): + + def test_limit(self): + self.assertListEqual(limit([1, 2, 3, 4, 5], 2, 4), [2, 3, 4]) + self.assertListEqual(limit([1, 2, 3, 4, 5], 2), [2, 3, 4, 5]) + self.assertListEqual(limit([1, 2, 3, 4, 5], None, 4), [1, 2, 3, 4]) + + if __name__ == '__main__': From 27d53fbb4cba6cc79c62daf86f70cb23c7686e32 Mon Sep 17 00:00:00 2001 From: NormalB Date: Thu, 14 Jun 2018 04:36:13 +0900 Subject: [PATCH 355/387] added radix sort for simulation (#351) --- algorithms/sort/radix_sort.py | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/algorithms/sort/radix_sort.py b/algorithms/sort/radix_sort.py index fee0f2f7f..dd4113d05 100644 --- a/algorithms/sort/radix_sort.py +++ b/algorithms/sort/radix_sort.py @@ -2,10 +2,14 @@ radix sort complexity: O(nk) . n is the size of input list and k is the digit length of the number """ -def radix_sort(arr): +def radix_sort(arr, simulation=False): is_done = False position = 1 + iteration = 0 + if simulation: + print("iteration",iteration,":",*arr) + while not is_done: queue_list = [list() for _ in range(10)] is_done = True @@ -22,5 +26,9 @@ def radix_sort(arr): arr[index] = num index += 1 + if simulation: + iteration = iteration + 1 + print("iteration",iteration,":",*arr) + position *= 10 return arr From 18b9ce123042bec808b7f2736fa8f4549afe2493 Mon Sep 17 00:00:00 2001 From: ppuzzle Date: Thu, 14 Jun 2018 12:51:29 +0900 Subject: [PATCH 356/387] added simulation to bogo_sort.py (#355) --- algorithms/sort/bogo_sort.py | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/algorithms/sort/bogo_sort.py b/algorithms/sort/bogo_sort.py index 074a6afca..60e1be8f0 100644 --- a/algorithms/sort/bogo_sort.py +++ b/algorithms/sort/bogo_sort.py @@ -1,11 +1,16 @@ import random -def bogo_sort(arr): +def bogo_sort(arr, simulation=False): """Bogo Sort Best Case Complexity: O(n) Worst Case Complexity: O(∞) Average Case Complexity: O(n(n-1)!) """ + + iteration = 0 + if simulation: + print("iteration",iteration,":",*arr) + def is_sorted(arr): #check the array is inorder i = 0 @@ -14,9 +19,14 @@ def is_sorted(arr): if arr[i] > arr[i+1]: return False i += 1 + + return True while not is_sorted(arr): random.shuffle(arr) + + if simulation: + iteration = iteration + 1 + print("iteration",iteration,":",*arr) + return arr - - From 7cbe6e1b6712d139b8859489405fc95be822c829 Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Sat, 16 Jun 2018 04:54:16 -0700 Subject: [PATCH 357/387] Added some String algorithm (#356) * Add unique morse * Add judge_circle * Add strong password --- README.md | 3 + algorithms/strings/__init__.py | 3 + algorithms/strings/judge_circle.py | 25 +++++++ algorithms/strings/strong_password.py | 43 ++++++++++++ algorithms/strings/unique_morse.py | 94 +++++++++++++++++++++++++++ tests/test_strings.py | 23 ++++++- 6 files changed, 189 insertions(+), 2 deletions(-) create mode 100644 algorithms/strings/judge_circle.py create mode 100644 algorithms/strings/strong_password.py create mode 100644 algorithms/strings/unique_morse.py diff --git a/README.md b/README.md index c03beceda..73877e476 100644 --- a/README.md +++ b/README.md @@ -284,6 +284,9 @@ If you want to uninstall algorithms, it is as simple as: - [reverse_words](algorithms/strings/reverse_words.py) - [roman_to_int](algorithms/strings/roman_to_int.py) - [word_squares](algorithms/strings/word_squares.py) + - [unique_morse](algorithms/strings/unique_morse.py) + - [judge_circle](algorithms/strings/judge_circle.py) + - [strong_password](algorithms/strings/strong_password.py) - [tree](algorithms/tree) - [bst](algorithms/tree/tree/bst) - [array2bst](algorithms/tree/bst/array2bst.py) diff --git a/algorithms/strings/__init__.py b/algorithms/strings/__init__.py index b4d1bb4c0..a74dbf06d 100644 --- a/algorithms/strings/__init__.py +++ b/algorithms/strings/__init__.py @@ -21,3 +21,6 @@ from .strip_url_params import * from .validate_coordinates import * from .word_squares import * +from .unique_morse import * +from .judge_circle import * +from .strong_password import * diff --git a/algorithms/strings/judge_circle.py b/algorithms/strings/judge_circle.py new file mode 100644 index 000000000..46468a1ad --- /dev/null +++ b/algorithms/strings/judge_circle.py @@ -0,0 +1,25 @@ +""" +Initially, there is a Robot at position (0, 0). Given a sequence of its moves, +judge if this robot makes a circle, which means it moves back to the original place. + +The move sequence is represented by a string. And each move is represent by a +character. The valid robot moves are R (Right), L (Left), U (Up) and D (down). +The output should be true or false representing whether the robot makes a circle. + +Example 1: +Input: "UD" +Output: true +Example 2: +Input: "LL" +Output: false +""" +def judge_circle(moves): + dict_moves = { + 'U' : 0, + 'D' : 0, + 'R' : 0, + 'L' : 0 + } + for char in moves: + dict_moves[char] = dict_moves[char] + 1 + return dict_moves['L'] == dict_moves['R'] and dict_moves['U'] == dict_moves['D'] diff --git a/algorithms/strings/strong_password.py b/algorithms/strings/strong_password.py new file mode 100644 index 000000000..85acd0223 --- /dev/null +++ b/algorithms/strings/strong_password.py @@ -0,0 +1,43 @@ +""" +The signup page required her to input a name and a password. However, the password +must be strong. The website considers a password to be strong if it satisfies the following criteria: + +1) Its length is at least 6. +2) It contains at least one digit. +3) It contains at least one lowercase English character. +4) It contains at least one uppercase English character. +5) It contains at least one special character. The special characters are: !@#$%^&*()-+ +She typed a random string of length in the password field but wasn't sure if it was strong. +Given the string she typed, can you find the minimum number of characters she must add to make her password strong? + +Note: Here's the set of types of characters in a form you can paste in your solution: +numbers = "0123456789" +lower_case = "abcdefghijklmnopqrstuvwxyz" +upper_case = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" +special_characters = "!@#$%^&*()-+" + +Input Format +The first line contains an integer denoting the length of the string. +The second line contains a string consisting of characters, the password +typed by Louise. Each character is either a lowercase/uppercase English alphabet, a digit, or a special character. + +Sample Input 1: strong_password(3,"Ab1") +Output: 3 (Because She can make the password strong by adding characters,for example, $hk, turning the password into Ab1$hk which is strong. +2 characters aren't enough since the length must be at least 6.) + +Sample Output 2: strong_password(11,"#Algorithms") +Output: 1 (Because the password isn't strong, but she can make it strong by adding a single digit.) + +""" +def strong_password(n, password): + count_error = 0 + # Return the minimum number of characters to make the password strong + if any(i.isdigit() for i in password) == False: + count_error = count_error + 1 + if any(i.islower() for i in password) == False: + count_error = count_error + 1 + if any(i.isupper() for i in password) == False: + count_error = count_error + 1 + if any(i in '!@#$%^&*()-+' for i in password) == False: + count_error = count_error + 1 + return max(count_error, 6 - n) diff --git a/algorithms/strings/unique_morse.py b/algorithms/strings/unique_morse.py new file mode 100644 index 000000000..6d8618644 --- /dev/null +++ b/algorithms/strings/unique_morse.py @@ -0,0 +1,94 @@ +""" +International Morse Code defines a standard encoding where each letter is mapped to +a series of dots and dashes, as follows: "a" maps to ".-", "b" maps to "-...", "c" +maps to "-.-.", and so on. + +For convenience, the full table for the 26 letters of the English alphabet is given below: + 'a':".-", + 'b':"-...", + 'c':"-.-.", + 'd': "-..", + 'e':".", + 'f':"..-.", + 'g':"--.", + 'h':"....", + 'i':"..", + 'j':".---", + 'k':"-.-", + 'l':".-..", + 'm':"--", + 'n':"-.", + 'o':"---", + 'p':".--.", + 'q':"--.-", + 'r':".-.", + 's':"...", + 't':"-", + 'u':"..-", + 'v':"...-", + 'w':".--", + 'x':"-..-", + 'y':"-.--", + 'z':"--.." + +Now, given a list of words, each word can be written as a concatenation of the +Morse code of each letter. For example, "cab" can be written as "-.-.-....-", +(which is the concatenation "-.-." + "-..." + ".-"). We'll call such a +concatenation, the transformation of a word. + +Return the number of different transformations among all words we have. +Example: +Input: words = ["gin", "zen", "gig", "msg"] +Output: 2 +Explanation: +The transformation of each word is: +"gin" -> "--...-." +"zen" -> "--...-." +"gig" -> "--...--." +"msg" -> "--...--." + +There are 2 different transformations, "--...-." and "--...--.". +""" + +morse_code = { + 'a':".-", + 'b':"-...", + 'c':"-.-.", + 'd': "-..", + 'e':".", + 'f':"..-.", + 'g':"--.", + 'h':"....", + 'i':"..", + 'j':".---", + 'k':"-.-", + 'l':".-..", + 'm':"--", + 'n':"-.", + 'o':"---", + 'p':".--.", + 'q':"--.-", + 'r':".-.", + 's':"...", + 't':"-", + 'u':"..-", + 'v':"...-", + 'w':".--", + 'x':"-..-", + 'y':"-.--", + 'z':"--.." +} +def convert_morse_word(word): + morse_word = "" + word = word.lower() + for char in word: + morse_word = morse_word + morse_code[char] + return morse_word + +def unique_morse(words): + unique_morse_word = [] + for word in words: + morse_word = convert_morse_word(word) + if morse_word not in unique_morse_word: + unique_morse_word.append(morse_word) + return len(unique_morse_word) diff --git a/tests/test_strings.py b/tests/test_strings.py index 31e0d3ed5..0cda82cc5 100644 --- a/tests/test_strings.py +++ b/tests/test_strings.py @@ -23,7 +23,10 @@ strip_url_params1, strip_url_params2, strip_url_params3, is_valid_coordinates_0, is_valid_coordinates_1, is_valid_coordinates_regular_expression, - word_squares + word_squares, + convert_morse_word, unique_morse, + judge_circle, + strong_password ) import unittest @@ -291,7 +294,7 @@ def test_pythonic(self): self.assertEqual("ereht olleh", pythonic("hello there")) def test_ultra_pythonic(self): self.assertEqual("ereht olleh", ultra_pythonic("hello there")) - + class TestReverseVowel(unittest.TestCase): """[summary] @@ -381,6 +384,22 @@ def test_word_squares(self): self.assertEqual([['wall', 'area', 'lead', 'lady'], ['ball', 'area', 'lead', 'lady']], \ word_squares(["area","lead","wall","lady","ball"])) +class TestUniqueMorse(unittest.TestCase): + def test_convert_morse_word(self): + self.assertEqual("--...-.", convert_morse_word("gin")) + self.assertEqual("--...--.", convert_morse_word("msg")) + def test_unique_morse(self): + self.assertEqual(2, unique_morse(["gin", "zen", "gig", "msg"])) + +class TestJudgeCircle(unittest.TestCase): + def test_judge_circle(self): + self.assertTrue(judge_circle("UDLRUD")) + self.assertFalse(judge_circle("LLRU")) + +class TestStrongPassword(unittest.TestCase): + def test_strong_password(self): + self.assertEqual(3, strong_password(3,"Ab1")) + self.assertEqual(1, strong_password(11,"#Algorithms")) if __name__ == "__main__": unittest.main() From 37bee74581cfc1b1ddb28ee5fe8da97bcd71c35a Mon Sep 17 00:00:00 2001 From: arsgsg1 Date: Tue, 19 Jun 2018 05:59:23 +0900 Subject: [PATCH 358/387] added combination_memo.py using memoization (#358) * Update combination.py * Update test_maths.py * fixed test_maths.py * update function combination_memo * update test of combination_memo --- algorithms/maths/combination.py | 13 ++++++++++++- tests/test_maths.py | 6 ++++-- 2 files changed, 16 insertions(+), 3 deletions(-) diff --git a/algorithms/maths/combination.py b/algorithms/maths/combination.py index ea9e4b37f..308b0bcc4 100644 --- a/algorithms/maths/combination.py +++ b/algorithms/maths/combination.py @@ -1,6 +1,17 @@ def combination(n, r): - # This function calculates nCr + """This function calculates nCr.""" if n == r or r == 0: return 1 else: return combination(n-1, r-1) + combination(n-1, r) + +def combination_memo(n, r): + """This function calculates nCr using memoization method.""" + memo = {} + def recur(n, r): + if n == r or r == 0: + return 1 + if (n, r) not in memo: + memo[(n, r)] = recur(n - 1, r - 1) + recur(n - 1, r) + return memo[(n, r)] + return recur(n, r) diff --git a/tests/test_maths.py b/tests/test_maths.py index 1514907fe..9270c28f5 100644 --- a/tests/test_maths.py +++ b/tests/test_maths.py @@ -12,7 +12,7 @@ pythagoras, is_prime, encrypt, decrypt, generate_key, - combination + combination, combination_memo ) import unittest @@ -230,7 +230,9 @@ class TestCombination(unittest.TestCase): def test_combination(self): self.assertEqual(10, combination(5, 2)) self.assertEqual(252, combination(10, 5)) - + def test_combination_memo(self): + self.assertEqual(10272278170, combination_memo(50, 10)) + self.assertEqual(847660528, combination_memo(40, 10)) class TestFactorial(unittest.TestCase): """[summary] Test for the file factorial.py From 5493bcda30f0b8ce390cf68de29f0dcdf0a17045 Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Mon, 18 Jun 2018 14:03:20 -0700 Subject: [PATCH 359/387] Add some String solution (#359) * Add unique morse * Add judge_circle * Add strong password * Add caesar cipher * Add contain string * Add count binary substring * Fix conflict --- README.md | 3 ++ algorithms/strings/__init__.py | 3 ++ algorithms/strings/caesar_cipher.py | 19 +++++++++++ algorithms/strings/contain_string.py | 25 +++++++++++++++ algorithms/strings/count_binary_substring.py | 33 ++++++++++++++++++++ tests/test_strings.py | 22 ++++++++++++- 6 files changed, 104 insertions(+), 1 deletion(-) create mode 100644 algorithms/strings/caesar_cipher.py create mode 100644 algorithms/strings/contain_string.py create mode 100644 algorithms/strings/count_binary_substring.py diff --git a/README.md b/README.md index 73877e476..4aa68cf60 100644 --- a/README.md +++ b/README.md @@ -287,6 +287,9 @@ If you want to uninstall algorithms, it is as simple as: - [unique_morse](algorithms/strings/unique_morse.py) - [judge_circle](algorithms/strings/judge_circle.py) - [strong_password](algorithms/strings/strong_password.py) + - [caesar_cipher](algorithms/strings/caesar_cipher.py) + - [contain_string](algorithms/strings/contain_string.py) + - [count_binary_substring](algorithms/strings/count_binary_substring.py) - [tree](algorithms/tree) - [bst](algorithms/tree/tree/bst) - [array2bst](algorithms/tree/bst/array2bst.py) diff --git a/algorithms/strings/__init__.py b/algorithms/strings/__init__.py index a74dbf06d..afeb60c3b 100644 --- a/algorithms/strings/__init__.py +++ b/algorithms/strings/__init__.py @@ -24,3 +24,6 @@ from .unique_morse import * from .judge_circle import * from .strong_password import * +from .caesar_cipher import * +from .contain_string import * +from .count_binary_substring import * diff --git a/algorithms/strings/caesar_cipher.py b/algorithms/strings/caesar_cipher.py new file mode 100644 index 000000000..379f63e0d --- /dev/null +++ b/algorithms/strings/caesar_cipher.py @@ -0,0 +1,19 @@ + +""" +Julius Caesar protected his confidential information by encrypting it using a cipher. +Caesar's cipher shifts each letter by a number of letters. If the shift takes you +past the end of the alphabet, just rotate back to the front of the alphabet. +In the case of a rotation by 3, w, x, y and z would map to z, a, b and c. +Original alphabet: abcdefghijklmnopqrstuvwxyz +Alphabet rotated +3: defghijklmnopqrstuvwxyzabc +""" +def caesar_cipher(s, k): + result = "" + for char in s: + n = ord(char) + if 64 < n < 91: + n = ((n - 65 + k) % 26) + 65 + if 96 < n < 123: + n = ((n - 97 + k) % 26) + 97 + result = result + chr(n) + return result diff --git a/algorithms/strings/contain_string.py b/algorithms/strings/contain_string.py new file mode 100644 index 000000000..67056fed6 --- /dev/null +++ b/algorithms/strings/contain_string.py @@ -0,0 +1,25 @@ +""" +Implement strStr(). + +Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. + +Example 1: +Input: haystack = "hello", needle = "ll" +Output: 2 + +Example 2: +Input: haystack = "aaaaa", needle = "bba" +Output: -1 +Reference: https://leetcode.com/problems/implement-strstr/description/ +""" +def contain_string(haystack, needle): + if len(needle) == 0: + return 0 + if len(needle) > len(haystack): + return -1 + for i in range(len(haystack)): + if len(haystack) - i < len(needle): + return -1 + if haystack[i:i+len(needle)] == needle: + return i + return -1 diff --git a/algorithms/strings/count_binary_substring.py b/algorithms/strings/count_binary_substring.py new file mode 100644 index 000000000..bd775ee53 --- /dev/null +++ b/algorithms/strings/count_binary_substring.py @@ -0,0 +1,33 @@ +""" +Give a string s, count the number of non-empty (contiguous) substrings that have + the same number of 0's and 1's, and all the 0's and all the 1's in these substrings are grouped consecutively. + +Substrings that occur multiple times are counted the number of times they occur. +Example 1: +Input: "00110011" +Output: 6 +Explanation: There are 6 substrings that have equal number of consecutive 1's and 0's: "0011", "01", "1100", "10", "0011", and "01". + +Notice that some of these substrings repeat and are counted the number of times they occur. + +Also, "00110011" is not a valid substring because all the 0's (and 1's) are not grouped together. + +Example 2: +Input: "10101" +Output: 4 +Explanation: There are 4 substrings: "10", "01", "10", "01" that have equal number of consecutive 1's and 0's. +Reference: https://leetcode.com/problems/count-binary-substrings/description/ +""" +def count_binary_substring(s): + cur = 1 + pre = 0 + count = 0 + for i in range(1, len(s)): + if s[i] != s[i - 1]: + count = count + min(pre, cur) + pre = cur + cur = 1 + else: + cur = cur + 1 + count = count + min(pre, cur) + return count diff --git a/tests/test_strings.py b/tests/test_strings.py index 0cda82cc5..05d977bd1 100644 --- a/tests/test_strings.py +++ b/tests/test_strings.py @@ -26,7 +26,10 @@ word_squares, convert_morse_word, unique_morse, judge_circle, - strong_password + strong_password, + caesar_cipher, + contain_string, + count_binary_substring ) import unittest @@ -401,5 +404,22 @@ def test_strong_password(self): self.assertEqual(3, strong_password(3,"Ab1")) self.assertEqual(1, strong_password(11,"#Algorithms")) +class TestCaesarCipher(unittest.TestCase): + def test_caesar_cipher(self): + self.assertEqual("Lipps_Asvph!", caesar_cipher("Hello_World!", 4)) + self.assertEqual("okffng-Qwvb", caesar_cipher("middle-Outz", 2)) + +class TestContainString(unittest.TestCase): + def test_contain_string(self): + self.assertEqual(-1, contain_string("mississippi", "issipi")) + self.assertEqual(0, contain_string("Hello World", "")) + self.assertEqual(2, contain_string("hello", "ll")) + +class TestCountBinarySubstring(unittest.TestCase): + def test_count_binary_substring(self): + self.assertEqual(6, count_binary_substring("00110011")) + self.assertEqual(4, count_binary_substring("10101")) + self.assertEqual(3, count_binary_substring("00110")) + if __name__ == "__main__": unittest.main() From 6ad74b6be9e3a02f5e992af368db4c2dc51d9808 Mon Sep 17 00:00:00 2001 From: Edilson Alves Date: Wed, 20 Jun 2018 16:02:17 -0300 Subject: [PATCH 360/387] Correction in README files (#360) --- README.md | 2 +- README_GE.md | 2 +- README_JP.md | 2 +- README_KR.md | 2 +- 4 files changed, 4 insertions(+), 4 deletions(-) diff --git a/README.md b/README.md index 4aa68cf60..3ba28d054 100644 --- a/README.md +++ b/README.md @@ -66,7 +66,7 @@ If you want to uninstall algorithms, it is as simple as: - [merge_intervals](algorithms/arrays/merge_intervals.py) - [missing_ranges](algorithms/arrays/missing_ranges.py) - [plus_one](algorithms/arrays/plus_one.py) -    - [rotate](algorithms/arrays/rotate.py) + - [rotate](algorithms/arrays/rotate.py) - [summarize_ranges](algorithms/arrays/summarize_ranges.py) - [three_sum](algorithms/arrays/three_sum.py) - [trimmean](algorithms/arrays/trimmean.py) diff --git a/README_GE.md b/README_GE.md index f9f475709..2760b2c76 100644 --- a/README_GE.md +++ b/README_GE.md @@ -73,7 +73,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [merge_intervals](algorithms/arrays/merge_intervals.py) - [missing_ranges](algorithms/arrays/missing_ranges.py) - [plus_one](algorithms/arrays/plus_one.py) -    - [rotate](algorithms/arrays/rotate.py) + - [rotate](algorithms/arrays/rotate.py) - [summarize_ranges](algorithms/arrays/summarize_ranges.py) - [three_sum](algorithms/arrays/three_sum.py) - [trimmean](algorithms/arrays/trimmean.py) diff --git a/README_JP.md b/README_JP.md index 571c70fe7..900f8ee91 100644 --- a/README_JP.md +++ b/README_JP.md @@ -67,7 +67,7 @@ if __name__ == "__main__": - [merge_intervals](algorithms/arrays/merge_intervals.py) - [missing_ranges](algorithms/arrays/missing_ranges.py) - [plus_one](algorithms/arrays/plus_one.py) -    - [rotate](algorithms/arrays/rotate.py) + - [rotate](algorithms/arrays/rotate.py) - [summarize_ranges](algorithms/arrays/summarize_ranges.py) - [three_sum](algorithms/arrays/three_sum.py) - [trimmean](algorithms/arrays/trimmean.py) diff --git a/README_KR.md b/README_KR.md index 773babd94..daf736865 100644 --- a/README_KR.md +++ b/README_KR.md @@ -66,7 +66,7 @@ if __name__ == "__main__": - [merge_intervals](algorithms/arrays/merge_intervals.py) - [missing_ranges](algorithms/arrays/missing_ranges.py) - [plus_one](algorithms/arrays/plus_one.py) -    - [rotate](algorithms/arrays/rotate.py) + - [rotate](algorithms/arrays/rotate.py) - [summarize_ranges](algorithms/arrays/summarize_ranges.py) - [three_sum](algorithms/arrays/three_sum.py) - [trimmean](algorithms/arrays/trimmean.py) From 447e02d9d89bbab2763ab99aac87ee5277b957bc Mon Sep 17 00:00:00 2001 From: Rahul Goswami Date: Fri, 22 Jun 2018 03:21:23 +0530 Subject: [PATCH 361/387] added exponential and some refactors to maths/ (#361) * added maths/modular_exponential.py and tests * cleared the requirements.txt * refactor math/factorial * refactor prime_check and sieve * added test_requirements.txt for travis --- .travis.yml | 2 +- README.md | 1 + README_CN.md | 1 + README_GE.md | 1 + README_JP.md | 1 + README_KR.md | 1 + algorithms/maths/__init__.py | 1 + algorithms/maths/extended_gcd.py | 13 ++-- algorithms/maths/factorial.py | 36 +++++++---- algorithms/maths/modular_exponential.py | 18 ++++++ algorithms/maths/nth_digit.py | 25 ++++---- algorithms/maths/prime_check.py | 27 ++------ .../maths/primes_sieve_of_eratosthenes.py | 32 ++++++---- algorithms/maths/rsa.py | 17 +++-- algorithms/maths/sqrt_precision_factor.py | 18 +++--- requirements.txt | 6 -- test_requirements.txt | 6 ++ tests/test_maths.py | 64 ++++++++++++------- 18 files changed, 155 insertions(+), 115 deletions(-) create mode 100644 algorithms/maths/modular_exponential.py create mode 100644 test_requirements.txt diff --git a/.travis.yml b/.travis.yml index 11468847b..e9a4450a2 100644 --- a/.travis.yml +++ b/.travis.yml @@ -12,7 +12,7 @@ matrix: - python: 3.6 env: TOX_ENV=py36 install: - - pip install -r requirements.txt + - pip install -r test_requirements.txt before_script: # stop the build if there are Python syntax errors or undefined names - flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics diff --git a/README.md b/README.md index 3ba28d054..82286982c 100644 --- a/README.md +++ b/README.md @@ -187,6 +187,7 @@ If you want to uninstall algorithms, it is as simple as: - [gcd/lcm](algorithms/maths/gcd.py) - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py) + - [modular_exponential](algorithms/maths/modular_exponential.py) - [next_bigger](algorithms/maths/next_bigger.py) - [next_perfect_square](algorithms/maths/next_perfect_square.py) - [nth_digit](algorithms/maths/nth_digit.py) diff --git a/README_CN.md b/README_CN.md index 42f7b36d0..99fac2ae2 100644 --- a/README_CN.md +++ b/README_CN.md @@ -183,6 +183,7 @@ pip3 uninstall -y algorithms - [primes_sieve_of_eratosthenes：埃拉托色尼的质数筛](algorithms/maths/primes_sieve_of_eratosthenes.py) - [generate_strobogrammtic：生成对称数](algorithms/maths/generate_strobogrammtic.py) - [is_strobogrammatic：判断对称数](algorithms/maths/is_strobogrammatic.py) + - [modular_exponential](algorithms/maths/modular_exponential.py) - [nth_digit：第n位](algorithms/maths/nth_digit.py) - [rabin_miller：米勒-拉宾素性检验](algorithms/maths/rabin_miller.py) - [rsa：rsa加密](algorithms/maths/rsa.py) diff --git a/README_GE.md b/README_GE.md index 2760b2c76..a8f16ad65 100644 --- a/README_GE.md +++ b/README_GE.md @@ -193,6 +193,7 @@ Um das Projekt zu deinstallieren tippen Sie folgendes: - [gcd/lcm](algorithms/maths/gcd.py) - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py) + - [modular_exponential](algorithms/maths/modular_exponential.py) - [next_bigger](algorithms/maths/next_bigger.py) - [next_perfect_square](algorithms/maths/next_perfect_square.py) - [nth_digit](algorithms/maths/nth_digit.py) diff --git a/README_JP.md b/README_JP.md index 900f8ee91..86453b784 100644 --- a/README_JP.md +++ b/README_JP.md @@ -187,6 +187,7 @@ if __name__ == "__main__": - [gcd/lcm](algorithms/maths/gcd.py) - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py) + - [modular_exponential](algorithms/maths/modular_exponential.py) - [next_bigger](algorithms/maths/next_bigger.py) - [next_perfect_square](algorithms/maths/next_perfect_square.py) - [nth_digit](algorithms/maths/nth_digit.py) diff --git a/README_KR.md b/README_KR.md index daf736865..ccb7fad5a 100644 --- a/README_KR.md +++ b/README_KR.md @@ -184,6 +184,7 @@ if __name__ == "__main__": - [gcd/lcm](algorithms/maths/gcd.py) - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py) + - [modular_exponential](algorithms/maths/modular_exponential.py) - [next_bigger](algorithms/maths/next_bigger.py) - [next_perfect_square](algorithms/maths/next_perfect_square.py) - [nth_digit](algorithms/maths/nth_digit.py) diff --git a/algorithms/maths/__init__.py b/algorithms/maths/__init__.py index 543d8d355..177fed31d 100644 --- a/algorithms/maths/__init__.py +++ b/algorithms/maths/__init__.py @@ -5,6 +5,7 @@ from .gcd import * from .generate_strobogrammtic import * from .is_strobogrammatic import * +from .modular_exponential import * from .next_perfect_square import * from .prime_check import * from .primes_sieve_of_eratosthenes import * diff --git a/algorithms/maths/extended_gcd.py b/algorithms/maths/extended_gcd.py index 96c31ac65..83b657807 100644 --- a/algorithms/maths/extended_gcd.py +++ b/algorithms/maths/extended_gcd.py @@ -1,11 +1,10 @@ -""" -extended GCD algorithm -return s,t,g -such that a s + b t = GCD(a, b) -and s and t are coprime -""" +def extended_gcd(a, b): + """Extended GCD algorithm. + Return s, t, g + such that a * s + b * t = GCD(a, b) + and s and t are co-prime. + """ -def extended_gcd(a,b): old_s, s = 1, 0 old_t, t = 0, 1 old_r, r = a, b diff --git a/algorithms/maths/factorial.py b/algorithms/maths/factorial.py index 2cd1a3491..23e1f5354 100644 --- a/algorithms/maths/factorial.py +++ b/algorithms/maths/factorial.py @@ -1,20 +1,32 @@ -# -# This function calculates n! -# Factorial function not works in less than 0 -# - -def factorial(n): - +def factorial(n, mod=None): + """Calculates factorial iteratively. + If mod is not None, then return (n! % mod) + Time Complexity - O(n)""" + if not (isinstance(n, int) and n >= 0): + raise ValueError("'n' must be a non-negative integer.") + if mod is not None and not (isinstance(mod, int) and mod > 0): + raise ValueError("'mod' must be a positive integer") result = 1 + if n == 0: + return 1 for i in range(2, n+1): result *= i - + if mod: + result %= mod return result -def factorial_recur(n): +def factorial_recur(n, mod=None): + """Calculates factorial recursively. + If mod is not None, then return (n! % mod) + Time Complexity - O(n)""" + if not (isinstance(n, int) and n >= 0): + raise ValueError("'n' must be a non-negative integer.") + if mod is not None and not (isinstance(mod, int) and mod > 0): + raise ValueError("'mod' must be a positive integer") if n == 0: return 1 - - return n * factorial(n-1) - + result = n * factorial(n - 1, mod) + if mod: + result %= mod + return result diff --git a/algorithms/maths/modular_exponential.py b/algorithms/maths/modular_exponential.py new file mode 100644 index 000000000..f0e58de8f --- /dev/null +++ b/algorithms/maths/modular_exponential.py @@ -0,0 +1,18 @@ +def modular_exponential(base, exponent, mod): + """Computes (base ^ exponent) % mod. + Time complexity - O(log n) + Use similar to Python in-built function pow.""" + if exponent < 0: + raise ValueError("Exponent must be positive.") + base %= mod + result = 1 + + while exponent > 0: + # If the last bit is 1, add 2^k. + if exponent & 1: + result = (result * base) % mod + exponent = exponent >> 1 + # Utilize modular multiplication properties to combine the computed mod C values. + base = (base * base) % mod + + return result diff --git a/algorithms/maths/nth_digit.py b/algorithms/maths/nth_digit.py index ea2d6819e..381926f3e 100644 --- a/algorithms/maths/nth_digit.py +++ b/algorithms/maths/nth_digit.py @@ -1,20 +1,17 @@ -""" -find nth digit -1. find the length of the number where the nth digit is from. -2. find the actual number where the nth digit is from -3. find the nth digit and return -""" - - def find_nth_digit(n): - len = 1 + """find the nth digit of given number. + 1. find the length of the number where the nth digit is from. + 2. find the actual number where the nth digit is from + 3. find the nth digit and return + """ + length = 1 count = 9 start = 1 - while n > len * count: - n -= len * count - len += 1 + while n > length * count: + n -= length * count + length += 1 count *= 10 start *= 10 - start += (n-1) / len + start += (n-1) / length s = str(start) - return int(s[(n-1) % len]) \ No newline at end of file + return int(s[(n-1) % length]) \ No newline at end of file diff --git a/algorithms/maths/prime_check.py b/algorithms/maths/prime_check.py index 1821d250b..60e4427ab 100644 --- a/algorithms/maths/prime_check.py +++ b/algorithms/maths/prime_check.py @@ -1,8 +1,8 @@ -""" -prime_test(n) returns a True if n is a prime number else it returns False -""" - def prime_check(n): + """Return True if n is a prime number + Else return False. + """ + if n <= 1: return False if n == 2 or n == 3: @@ -15,22 +15,3 @@ def prime_check(n): return False j += 6 return True - - -def prime_check2(n): - # prime numbers are greater than 1 - if n > 1: - # check for factors - for i in range(2, int(n ** 0.5) + 1): - if (n % i) == 0: - # print(num, "is not a prime number") - # print(i, "times", num//i, "is", num) - return False - - # print(num, "is a prime number") - return True - - # if input number is less than - # or equal to 1, it is not prime - else: - return False diff --git a/algorithms/maths/primes_sieve_of_eratosthenes.py b/algorithms/maths/primes_sieve_of_eratosthenes.py index 1677b2575..7c21c6d82 100644 --- a/algorithms/maths/primes_sieve_of_eratosthenes.py +++ b/algorithms/maths/primes_sieve_of_eratosthenes.py @@ -1,11 +1,12 @@ -''' -Using sieve of Eratosthenes, primes(x) returns list of all primes less than x +""" +Return list of all primes less than n, +Using sieve of Eratosthenes. Modification: We don't need to check all even numbers, we can make the sieve excluding even numbers and adding 2 to the primes list by default. -We are going to make an array of: x / 2 - 1 if number is even, else x / 2 +We are going to make an array of: x / 2 - 1 if number is even, else x / 2 (The -1 with even number it's to exclude the number itself) Because we just need numbers [from 3..x if x is odd] @@ -21,20 +22,25 @@ With this, we have reduced the array size to a half, and complexity it's also a half now. -''' +""" -def primes(x): - assert(x >= 0) + +def get_primes(n): + """Return list of all primes less than n, + Using sieve of Eratosthenes. + """ + if n <= 0: + raise ValueError("'n' must be a positive integer.") # If x is even, exclude x from list (-1): - sieve_size = (x//2 - 1) if x % 2 == 0 else (x//2) - sieve = [1 for v in range(sieve_size)] # Sieve - primes = [] # List of Primes - if x >= 2: - primes.append(2) # Add 2 by default + sieve_size = (n // 2 - 1) if n % 2 == 0 else (n // 2) + sieve = [True for _ in range(sieve_size)] # Sieve + primes = [] # List of Primes + if n >= 2: + primes.append(2) # 2 is prime by default for i in range(sieve_size): - if sieve[i] == 1: + if sieve[i]: value_at_i = i*2 + 3 primes.append(value_at_i) for j in range(i, sieve_size, value_at_i): - sieve[j] = 0 + sieve[j] = False return primes diff --git a/algorithms/maths/rsa.py b/algorithms/maths/rsa.py index e3f29956c..70b7bc5cc 100644 --- a/algorithms/maths/rsa.py +++ b/algorithms/maths/rsa.py @@ -24,21 +24,20 @@ import random -def modinv(a, m): - """calculate the inverse of a mod m - that is, find b such that (a * b) % m == 1""" - b = 1 - while not (a * b) % m == 1: - b += 1 - return b - - def generate_key(k, seed=None): """ the RSA key generating algorithm k is the number of bits in n """ + def modinv(a, m): + """calculate the inverse of a mod m + that is, find b such that (a * b) % m == 1""" + b = 1 + while not (a * b) % m == 1: + b += 1 + return b + def gen_prime(k, seed=None): """generate a prime with k bits""" diff --git a/algorithms/maths/sqrt_precision_factor.py b/algorithms/maths/sqrt_precision_factor.py index ce4f0cf94..bb47c0945 100644 --- a/algorithms/maths/sqrt_precision_factor.py +++ b/algorithms/maths/sqrt_precision_factor.py @@ -1,17 +1,19 @@ """ Given a positive integer N and a precision factor P, -write a square root function that produce an output +it produces an output with a maximum error P from the actual square root of N. Example: -Given N = 5 and P = 0.001, can produce output O such that -2.235 < O > 2.237. Actual square root of 5 being 2.236. +Given N = 5 and P = 0.001, can produce output x such that +2.235 < x < 2.237. Actual square root of 5 being 2.236. """ -def square_root(n,p): - guess = float(n) / 2 - while abs(guess * guess - n) > p: - guess = (guess + (n / guess)) / 2 +def square_root(n, epsilon=0.001): + """Return square root of n, with maximum absolute error epsilon""" + guess = n / 2 - return guess + while abs(guess * guess - n) > epsilon: + guess = (guess + (n / guess)) / 2 + + return guess diff --git a/requirements.txt b/requirements.txt index 7a3e47c8a..e69de29bb 100644 --- a/requirements.txt +++ b/requirements.txt @@ -1,6 +0,0 @@ -flake8 -python-coveralls -coverage -nose -pytest -tox diff --git a/test_requirements.txt b/test_requirements.txt new file mode 100644 index 000000000..7a3e47c8a --- /dev/null +++ b/test_requirements.txt @@ -0,0 +1,6 @@ +flake8 +python-coveralls +coverage +nose +pytest +tox diff --git a/tests/test_maths.py b/tests/test_maths.py index 9270c28f5..2499a4f88 100644 --- a/tests/test_maths.py +++ b/tests/test_maths.py @@ -6,12 +6,13 @@ gcd, lcm, gen_strobogrammatic, strobogrammatic_in_range, is_strobogrammatic, is_strobogrammatic2, + modular_exponential, find_next_square, find_next_square2, - prime_check, prime_check2, - primes, + prime_check, + get_primes, pythagoras, is_prime, - encrypt, decrypt, generate_key, + encrypt, decrypt, combination, combination_memo ) @@ -46,9 +47,12 @@ class TestDecimalToBinaryIP(unittest.TestCase): """ def test_decimal_to_binary_ip(self): - self.assertEqual("00000000.00000000.00000000.00000000", decimal_to_binary_ip("0.0.0.0")) - self.assertEqual("11111111.11111111.11111111.11111111", decimal_to_binary_ip("255.255.255.255")) - self.assertEqual("11000000.10101000.00000000.00000001", decimal_to_binary_ip("192.168.0.1")) + self.assertEqual("00000000.00000000.00000000.00000000", + decimal_to_binary_ip("0.0.0.0")) + self.assertEqual("11111111.11111111.11111111.11111111", + decimal_to_binary_ip("255.255.255.255")) + self.assertEqual("11000000.10101000.00000000.00000001", + decimal_to_binary_ip("192.168.0.1")) class TestExtendedGcd(unittest.TestCase): @@ -112,6 +116,22 @@ def test_is_strobogrammatic2(self): self.assertFalse(is_strobogrammatic2("14")) +class TestModularExponential(unittest.TestCase): + """[summary] + Test for the file modular_Exponential.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_modular_exponential(self): + self.assertEqual(1, modular_exponential(5, 117, 19)) + self.assertEqual(pow(1243, 65321, 10**9 + 7), + modular_exponential(1243, 65321, 10**9 + 7)) + self.assertEqual(1, modular_exponential(12, 0, 78)) + self.assertRaises(ValueError, modular_exponential, 12, -2, 455) + + class TestNextPerfectSquare(unittest.TestCase): """[summary] Test for the file next_perfect_square.py @@ -138,7 +158,8 @@ class TestPrimesSieveOfEratosthenes(unittest.TestCase): """ def test_primes(self): - self.assertEqual([2, 3, 5, 7], primes(7)) + self.assertListEqual([2, 3, 5, 7], get_primes(7)) + self.assertRaises(ValueError, get_primes, -42) class TestPrimeTest(unittest.TestCase): @@ -160,17 +181,6 @@ def test_prime_test(self): counter += 1 self.assertEqual(25, counter) - def test_prime_test2(self): - """ - checks all prime numbers between 2 up to 100. - Between 2 up to 100 exists 25 prime numbers! - """ - counter = 0 - for i in range(2, 101): - if prime_check2(i): - counter += 1 - self.assertEqual(25, counter) - class TestPythagoras(unittest.TestCase): """[summary] @@ -219,6 +229,7 @@ def test_encrypt_decrypt(self): # dec = decrypt(en, d, n) # self.assertEqual(data,dec) + class TestCombination(unittest.TestCase): """[summary] Test for the file combination.py @@ -230,9 +241,12 @@ class TestCombination(unittest.TestCase): def test_combination(self): self.assertEqual(10, combination(5, 2)) self.assertEqual(252, combination(10, 5)) + def test_combination_memo(self): self.assertEqual(10272278170, combination_memo(50, 10)) self.assertEqual(847660528, combination_memo(40, 10)) + + class TestFactorial(unittest.TestCase): """[summary] Test for the file factorial.py @@ -245,13 +259,19 @@ def test_factorial(self): self.assertEqual(1, factorial(0)) self.assertEqual(120, factorial(5)) self.assertEqual(3628800, factorial(10)) - + self.assertEqual(637816310, factorial(34521, 10**9 + 7)) + self.assertRaises(ValueError, factorial, -42) + self.assertRaises(ValueError, factorial, 42, -1) + def test_factorial_recur(self): self.assertEqual(1, factorial_recur(0)) self.assertEqual(120, factorial_recur(5)) self.assertEqual(3628800, factorial_recur(10)) - + self.assertEqual(637816310, factorial_recur(34521, 10**9 + 7)) + self.assertRaises(ValueError, factorial_recur, -42) + self.assertRaises(ValueError, factorial_recur, 42, -1) + + if __name__ == "__main__": unittest.main() - - + From 7520795db8a40f40942454116357d2b9262a552b Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Wed, 27 Jun 2018 11:39:13 -0700 Subject: [PATCH 362/387] Added some solution (#362) * Add simplify path * Add repeat string --- README.md | 2 ++ algorithms/strings/__init__.py | 1 + algorithms/strings/repeat_string.py | 24 ++++++++++++++++++++++ algorithms/unix/__init__.py | 1 + algorithms/unix/path/simplify_path.py | 29 +++++++++++++++++++++++++++ tests/test_strings.py | 8 +++++++- tests/test_unix.py | 9 ++++++++- 7 files changed, 72 insertions(+), 2 deletions(-) create mode 100644 algorithms/strings/repeat_string.py create mode 100644 algorithms/unix/path/simplify_path.py diff --git a/README.md b/README.md index 82286982c..abc9f5503 100644 --- a/README.md +++ b/README.md @@ -291,6 +291,7 @@ If you want to uninstall algorithms, it is as simple as: - [caesar_cipher](algorithms/strings/caesar_cipher.py) - [contain_string](algorithms/strings/contain_string.py) - [count_binary_substring](algorithms/strings/count_binary_substring.py) + - [repeat_string](algorithms/strings/repeat_string.py) - [tree](algorithms/tree) - [bst](algorithms/tree/tree/bst) - [array2bst](algorithms/tree/bst/array2bst.py) @@ -343,6 +344,7 @@ If you want to uninstall algorithms, it is as simple as: - [join_with_slash](algorithms/unix/path/join_with_slash.py) - [full_path](algorithms/unix/path/full_path.py) - [split](algorithms/unix/path/split.py) + - [simplify_path](algorithms/unix/path/simplify_path.py) - [union-find](algorithms/union-find) - [count_islands](algorithms/union-find/count_islands.py) diff --git a/algorithms/strings/__init__.py b/algorithms/strings/__init__.py index afeb60c3b..4040c9e85 100644 --- a/algorithms/strings/__init__.py +++ b/algorithms/strings/__init__.py @@ -27,3 +27,4 @@ from .caesar_cipher import * from .contain_string import * from .count_binary_substring import * +from .repeat_string import * diff --git a/algorithms/strings/repeat_string.py b/algorithms/strings/repeat_string.py new file mode 100644 index 000000000..cc871f64c --- /dev/null +++ b/algorithms/strings/repeat_string.py @@ -0,0 +1,24 @@ +""" +Given two strings A and B, find the minimum number of times A has to be repeated such that B is a substring of it. If no such solution, return -1. + +For example, with A = "abcd" and B = "cdabcdab". + +Return 3, because by repeating A three times (“abcdabcdabcd”), B is a substring of it; and B is not a substring of A repeated two times ("abcdabcd"). + +Note: +The length of A and B will be between 1 and 10000. + +Reference: https://leetcode.com/problems/repeated-string-match/description/ +""" +def repeat_string(A, B): + count = 1 + tmp = A + max_count = (len(B) / len(A)) + 1 + while not(B in tmp): + tmp = tmp + A + if (count > max_count): + count = -1 + break + count = count + 1 + + return count diff --git a/algorithms/unix/__init__.py b/algorithms/unix/__init__.py index 68b785c97..0d1808da0 100644 --- a/algorithms/unix/__init__.py +++ b/algorithms/unix/__init__.py @@ -1,3 +1,4 @@ from .path.join_with_slash import * from .path.full_path import * from .path.split import * +from .path.simplify_path import * diff --git a/algorithms/unix/path/simplify_path.py b/algorithms/unix/path/simplify_path.py new file mode 100644 index 000000000..8880fc0c6 --- /dev/null +++ b/algorithms/unix/path/simplify_path.py @@ -0,0 +1,29 @@ +""" +Given an absolute path for a file (Unix-style), simplify it. + +For example, +path = "/home/", => "/home" +path = "/a/./b/../../c/", => "/c" + +Corner Cases: + +Did you consider the case where path = "/../"? +In this case, you should return "/". +Another corner case is the path might contain multiple slashes '/' together, such as "/home//foo/". +In this case, you should ignore redundant slashes and return "/home/foo". + +Reference: https://leetcode.com/problems/simplify-path/description/ +""" + +import os +def simplify_path_v1(path): + return os.path.abspath(path) + +def simplify_path_v2(path): + stack, tokens = [], path.split("/") + for token in tokens: + if token == ".." and stack: + stack.pop() + elif token != ".." and token != "." and token: + stack.append(token) + return "/" + "/".join(stack) diff --git a/tests/test_strings.py b/tests/test_strings.py index 05d977bd1..c8b918280 100644 --- a/tests/test_strings.py +++ b/tests/test_strings.py @@ -29,7 +29,8 @@ strong_password, caesar_cipher, contain_string, - count_binary_substring + count_binary_substring, + repeat_string ) import unittest @@ -421,5 +422,10 @@ def test_count_binary_substring(self): self.assertEqual(4, count_binary_substring("10101")) self.assertEqual(3, count_binary_substring("00110")) +class TestCountBinarySubstring(unittest.TestCase): + def test_repeat_string(self): + self.assertEqual(3, repeat_string("abcd","cdabcdab")) + self.assertEqual(4, repeat_string("bb", "bbbbbbb")) + if __name__ == "__main__": unittest.main() diff --git a/tests/test_unix.py b/tests/test_unix.py index a24388970..e7a6c6349 100644 --- a/tests/test_unix.py +++ b/tests/test_unix.py @@ -1,7 +1,8 @@ from algorithms.unix import ( join_with_slash, full_path, - split + split, + simplify_path_v1, simplify_path_v2 ) import os import unittest @@ -33,3 +34,9 @@ def test_split(self): expect_result = split(path) self.assertEqual("algorithms/unix", expect_result[0]) self.assertEqual("test.py", expect_result[1]) + + def test_simplify_path(self): + self.assertEqual("/", simplify_path_v1("/../")) + self.assertEqual("/home/foo", simplify_path_v1("/home//foo/")) + self.assertEqual("/", simplify_path_v2("/../")) + self.assertEqual("/home/foo", simplify_path_v2("/home//foo/")) From 81e78536d4cad1519d5ffd18b79b616ec53f63bb Mon Sep 17 00:00:00 2001 From: Matt Phillips Date: Thu, 28 Jun 2018 14:38:03 -0500 Subject: [PATCH 363/387] #256 change strip_url_params3 to use OrderedDict to prevent failing test on non deterministic retrieval of dict keys for query string (#367) --- algorithms/strings/strip_url_params.py | 4 ++- tests/test_strings.py | 34 +++++++++++++------------- 2 files changed, 20 insertions(+), 18 deletions(-) diff --git a/algorithms/strings/strip_url_params.py b/algorithms/strings/strip_url_params.py index 364f78091..d2821a69f 100644 --- a/algorithms/strings/strip_url_params.py +++ b/algorithms/strings/strip_url_params.py @@ -10,6 +10,8 @@ import urllib import urllib.parse +from collections import OrderedDict + # Here is a very non-pythonic grotesque solution def strip_url_params1(url, params_to_strip=None): @@ -37,7 +39,7 @@ def strip_url_params1(url, params_to_strip=None): string = '' else: string += char - dict = defaultdict(int) + dict = OrderedDict() # logic for checking whether we should add the string to our result for i in key_value_string: _token = i.split('=') diff --git a/tests/test_strings.py b/tests/test_strings.py index c8b918280..69c05b315 100644 --- a/tests/test_strings.py +++ b/tests/test_strings.py @@ -339,23 +339,23 @@ def test_roman_to_int(self): self.assertEqual(3999, roman_to_int("MMMCMXCIX")) -# class TestStripUrlParams(unittest.TestCase): -# """[summary] -# Test for the file strip_urls_params.py - -# Arguments: -# unittest {[type]} -- [description] -# """ - -# def test_strip_url_params1(self): -# self.assertEqual(strip_url_params1("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") -# self.assertEqual(strip_url_params1("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") -# def test_strip_url_params2(self): -# self.assertEqual(strip_url_params2("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") -# self.assertEqual(strip_url_params2("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") -# def test_strip_url_params3(self): -# self.assertEqual(strip_url_params3("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") -# self.assertEqual(strip_url_params3("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") +class TestStripUrlParams(unittest.TestCase): + """[summary] + Test for the file strip_urls_params.py + + Arguments: + unittest {[type]} -- [description] + """ + + def test_strip_url_params1(self): + self.assertEqual(strip_url_params1("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") + self.assertEqual(strip_url_params1("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") + def test_strip_url_params2(self): + self.assertEqual(strip_url_params2("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") + self.assertEqual(strip_url_params2("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") + def test_strip_url_params3(self): + self.assertEqual(strip_url_params3("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") + self.assertEqual(strip_url_params3("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") class TestValidateCoordinates(unittest.TestCase): From a289b6bf1ce2e286627ddd077b12d2e71f4030f0 Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Thu, 28 Jun 2018 16:44:34 -0700 Subject: [PATCH 364/387] Revert "#256 change strip_url_params3 to use OrderedDict to prevent failing test on non deterministic retrieval of dict keys for query string (#367)" (#368) This reverts commit 81e78536d4cad1519d5ffd18b79b616ec53f63bb. --- algorithms/strings/strip_url_params.py | 4 +-- tests/test_strings.py | 34 +++++++++++++------------- 2 files changed, 18 insertions(+), 20 deletions(-) diff --git a/algorithms/strings/strip_url_params.py b/algorithms/strings/strip_url_params.py index d2821a69f..364f78091 100644 --- a/algorithms/strings/strip_url_params.py +++ b/algorithms/strings/strip_url_params.py @@ -10,8 +10,6 @@ import urllib import urllib.parse -from collections import OrderedDict - # Here is a very non-pythonic grotesque solution def strip_url_params1(url, params_to_strip=None): @@ -39,7 +37,7 @@ def strip_url_params1(url, params_to_strip=None): string = '' else: string += char - dict = OrderedDict() + dict = defaultdict(int) # logic for checking whether we should add the string to our result for i in key_value_string: _token = i.split('=') diff --git a/tests/test_strings.py b/tests/test_strings.py index 69c05b315..c8b918280 100644 --- a/tests/test_strings.py +++ b/tests/test_strings.py @@ -339,23 +339,23 @@ def test_roman_to_int(self): self.assertEqual(3999, roman_to_int("MMMCMXCIX")) -class TestStripUrlParams(unittest.TestCase): - """[summary] - Test for the file strip_urls_params.py - - Arguments: - unittest {[type]} -- [description] - """ - - def test_strip_url_params1(self): - self.assertEqual(strip_url_params1("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") - self.assertEqual(strip_url_params1("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") - def test_strip_url_params2(self): - self.assertEqual(strip_url_params2("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") - self.assertEqual(strip_url_params2("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") - def test_strip_url_params3(self): - self.assertEqual(strip_url_params3("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") - self.assertEqual(strip_url_params3("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") +# class TestStripUrlParams(unittest.TestCase): +# """[summary] +# Test for the file strip_urls_params.py + +# Arguments: +# unittest {[type]} -- [description] +# """ + +# def test_strip_url_params1(self): +# self.assertEqual(strip_url_params1("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") +# self.assertEqual(strip_url_params1("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") +# def test_strip_url_params2(self): +# self.assertEqual(strip_url_params2("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") +# self.assertEqual(strip_url_params2("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") +# def test_strip_url_params3(self): +# self.assertEqual(strip_url_params3("www.saadbenn.com?a=1&b=2&a=2"), "www.saadbenn.com?a=1&b=2") +# self.assertEqual(strip_url_params3("www.saadbenn.com?a=1&b=2", ['b']), "www.saadbenn.com?a=1") class TestValidateCoordinates(unittest.TestCase): From c9cfdef3a04e317a02381c4f80053533fa8b1d37 Mon Sep 17 00:00:00 2001 From: Ernest Date: Fri, 29 Jun 2018 16:00:23 +0800 Subject: [PATCH 365/387] Implemented n sum (#365) * Implement N sum * Add N sum test * Add docstring * Add n num link * Rearrange code * Fix import error * Move functions to inner * Fix coding style * Rename * Separate logic * Add advanced usage example * Add test * Fix error: cannot hash list object when user's nums is a list of list * Add parameters docstring --- README.md | 1 + algorithms/arrays/__init__.py | 1 + algorithms/arrays/n_sum.py | 129 ++++++++++++++++++++++++++++++++++ tests/test_array.py | 36 ++++++++-- 4 files changed, 161 insertions(+), 6 deletions(-) create mode 100644 algorithms/arrays/n_sum.py diff --git a/README.md b/README.md index abc9f5503..80de0529f 100644 --- a/README.md +++ b/README.md @@ -73,6 +73,7 @@ If you want to uninstall algorithms, it is as simple as: - [top_1](algorithms/arrays/top_1.py) - [two_sum](algorithms/arrays/two_sum.py) - [move_zeros](algorithms/arrays/move_zeros.py) + - [n_sum](algorithms/arrays/n_sum.py) - [backtrack](algorithms/backtrack) - [general_solution.md](algorithms/backtrack/) - [anagram](algorithms/backtrack/anagram.py) diff --git a/algorithms/arrays/__init__.py b/algorithms/arrays/__init__.py index c0d8b8f23..9670db750 100644 --- a/algorithms/arrays/__init__.py +++ b/algorithms/arrays/__init__.py @@ -15,3 +15,4 @@ from .top_1 import * from .two_sum import * from .limit import * +from .n_sum import * diff --git a/algorithms/arrays/n_sum.py b/algorithms/arrays/n_sum.py new file mode 100644 index 000000000..a01348e57 --- /dev/null +++ b/algorithms/arrays/n_sum.py @@ -0,0 +1,129 @@ +""" +Given an array of n integers, are there elements a, b, .. , n in nums +such that a + b + .. + n = target? + +Find all unique triplets in the array which gives the sum of target. + +Example: + basic: + Given: + n = 4, nums = [1, 0, -1, 0, -2, 2], target = 0, + return [[-2, -1, 1, 2], [-2, 0, 0, 2], [-1, 0, 0, 1]] + + advanced: + Given: + n = 2 + nums = [[-3, 0], [-2, 1], [2, 2], [3, 3], [8, 4], [-9, 5]] + taget = -5 + def sum(a, b): + return [a[0] + b[1], a[1] + b[0]] + def compare(num, taget): + if num[0] < taget: + return -1 + elif if num[0] > taget: + return 1 + else: + return 0 + return [[-9, 5], [8, 4]] + because -9 + 4 = -5 +""" + + +def n_sum(n, nums, target, **kv): + """ + n: int + nums: list[object] + target: object + sum_closure: function, optional + Given two elements of nums, return sum of both. + compare_closure: function, optional + Given one object of nums and target, return one of -1, 1, or 0. + same_closure: function, optional + Given two object of nums, return bool. + return: list[list[object]] + + Note: + 1. type of sum_closure's return should be same as type of compare_closure's first param + """ + + def sum_closure_default(a, b): + return a + b + + def compare_closure_default(num, taget): + if num < taget: + return -1 + elif num > taget: + return 1 + else: + return 0 + + def same_closure_default(a, b): + return a == b + + def n_sum(n, nums, target): + if n == 2: + results = two_sum(nums, target) + else: + results = [] + prev_num = None + for index, num in enumerate(nums): + if prev_num is not None and \ + same_closure(prev_num, num): + continue + prev_num = num + n_minus1_results = n_sum(n - 1, + nums[index + 1:], + target - num) + n_minus1_results = append_elem_to_each_list(num, + n_minus1_results) + results += n_minus1_results + return union(results) + + def two_sum(nums, target): + nums.sort() + lt = 0 + rt = len(nums) - 1 + results = [] + while lt < rt: + sum_ = sum_closure(nums[lt], nums[rt]) + flag = compare_closure(sum_, target) + if flag == -1: + lt += 1 + elif flag == 1: + rt -= 1 + else: + results.append(sorted([nums[lt], nums[rt]])) + lt += 1 + rt -= 1 + while (lt < len(nums) and + same_closure(nums[lt - 1], nums[lt])): + lt += 1 + while (0 <= rt and + same_closure(nums[rt], nums[rt + 1])): + rt -= 1 + return results + + def append_elem_to_each_list(elem, container): + results = [] + for elems in container: + elems.append(elem) + results.append(sorted(elems)) + return results + + def union(duplicate_results): + results = [] + + if len(duplicate_results) != 0: + duplicate_results.sort() + results.append(duplicate_results[0]) + for result in duplicate_results[1:]: + if results[-1] != result: + results.append(result) + + return results + + sum_closure = kv.get('sum_closure', sum_closure_default) + same_closure = kv.get('same_closure', same_closure_default) + compare_closure = kv.get('compare_closure', compare_closure_default) + nums.sort() + return n_sum(n, nums, target) diff --git a/tests/test_array.py b/tests/test_array.py index 6002adb43..47e24347a 100644 --- a/tests/test_array.py +++ b/tests/test_array.py @@ -15,7 +15,8 @@ max_ones_index, trimmean, top_1, - limit + limit, + n_sum ) import unittest @@ -309,28 +310,51 @@ def test_two_sum(self): self.assertTupleEqual((0, 3), two_sum([-3, 5, 2, 3, 8, -9], target=0)) self.assertIsNone(two_sum([-3, 5, 2, 3, 8, -9], target=6)) - + + class TestTrimmean(unittest.TestCase): def test_trimmean(self): self.assertEqual(trimmean([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], 20), 5.5) self.assertEqual(trimmean([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11], 20), 6.0) - + + class TestTop1(unittest.TestCase): - + def test_top_1(self): self.assertListEqual(top_1([1 , 1, 2, 2, 3]), [1, 2]) self.assertListEqual(top_1([1, 2, 3, 324, 234, 23, 23, 1, 23, 23]), [23]) + class TestLimit(unittest.TestCase): - + def test_limit(self): self.assertListEqual(limit([1, 2, 3, 4, 5], 2, 4), [2, 3, 4]) self.assertListEqual(limit([1, 2, 3, 4, 5], 2), [2, 3, 4, 5]) self.assertListEqual(limit([1, 2, 3, 4, 5], None, 4), [1, 2, 3, 4]) - + +class TestNSum(unittest.TestCase): + + def test_n_sum(self): + self.assertEqual(n_sum(2, [-3, 5, 2, 3, 8, -9], 6), []) # noqa: E501 + self.assertEqual(n_sum(3, [-5, -4, -3, -2, -1, 0, 1, 2, 3], 0), sorted([[-5,2,3],[-2,0,2],[-4,1,3],[-3,1,2],[-1,0,1],[-2,-1,3],[-3,0,3]])) # noqa: E501 + self.assertEqual(n_sum(3, [-1,0,1,2,-1,-4], 0), sorted([[-1,-1,2],[-1,0,1]])) # noqa: E501 + self.assertEqual(n_sum(4, [1, 0, -1, 0, -2, 2], 0), sorted([[-2, -1, 1, 2], [-2, 0, 0, 2], [-1, 0, 0, 1]])) # noqa: E501 + self.assertEqual(n_sum(4, [7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 6, 4, -3, -2], 10), sorted([[-6, 2, 7, 7], [-6, 3, 6, 7], [-6, 4, 5, 7], [-6, 4, 6, 6], [-5, 1, 7, 7], [-5, 2, 6, 7], [-5, 3, 5, 7], [-5, 3, 6, 6], [-5, 4, 4, 7], [-5, 4, 5, 6], [-4, 0, 7, 7], [-4, 1, 6, 7], [-4, 2, 5, 7], [-4, 2, 6, 6], [-4, 3, 4, 7], [-4, 3, 5, 6], [-4, 4, 4, 6], [-3, -1, 7, 7], [-3, 0, 6, 7], [-3, 1, 5, 7], [-3, 1, 6, 6], [-3, 2, 4, 7], [-3, 2, 5, 6], [-3, 3, 4, 6], [-3, 4, 4, 5], [-2, -2, 7, 7], [-2, -1, 6, 7], [-2, 0, 5, 7], [-2, 0, 6, 6], [-2, 1, 4, 7], [-2, 1, 5, 6], [-2, 2, 3, 7], [-2, 2, 4, 6], [-2, 3, 4, 5], [-1, 0, 4, 7], [-1, 0, 5, 6], [-1, 1, 3, 7], [-1, 1, 4, 6], [-1, 2, 3, 6], [-1, 2, 4, 5], [-1, 3, 4, 4], [0, 1, 2, 7], [0, 1, 3, 6], [0, 1, 4, 5], [0, 2, 3, 5], [0, 2, 4, 4], [1, 2, 3, 4]])) # noqa: E501 + + self.assertEqual(n_sum(2, [[-3, 0], [-2, 1], [2, 2], [3, 3], [8, 4], [-9, 5]], 0, # noqa: E501 + sum_closure=lambda a, b: a[0] + b[0]), # noqa: E501 + [[[-3, 0], [3, 3]], [[-2, 1], [2, 2]]]) # noqa: E501 + self.assertEqual(n_sum(2, [[-3, 0], [-2, 1], [2, 2], [3, 3], [8, 4], [-9, 5]], [0, 3], # noqa: E501 + sum_closure=lambda a, b: [a[0] + b[0], a[1] + b[1]], # noqa: E501 + same_closure=lambda a, b: a[0] == b[0] and a[1] == b[1]), # noqa: E501 + [[[-3, 0], [3, 3]], [[-2, 1], [2, 2]]]) # noqa: E501 + self.assertEqual(n_sum(2, [[-3, 0], [-2, 1], [2, 2], [3, 3], [8, 4], [-9, 5]], -5, # noqa: E501 + sum_closure=lambda a, b: [a[0] + b[1], a[1] + b[0]], # noqa: E501 + compare_closure=lambda a, b: -1 if a[0] < b else 1 if a[0] > b else 0), # noqa: E501 + [[[-9, 5], [8, 4]]]) # noqa: E501 if __name__ == '__main__': From 2d3faffc21096cfec4b4871e94ad6972aa5f16c8 Mon Sep 17 00:00:00 2001 From: Edilson Alves Date: Sat, 30 Jun 2018 12:49:31 -0300 Subject: [PATCH 366/387] Created README file in Brazilian Portuguese (#370) * Created README file in Brazilian Portuguese * Added link to README_PTBR.md --- README.md | 2 +- README_CN.md | 2 +- README_GE.md | 2 +- README_JP.md | 2 +- README_KR.md | 2 +- README_PTBR.md | 359 +++++++++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 364 insertions(+), 5 deletions(-) create mode 100644 README_PTBR.md diff --git a/README.md b/README.md index 80de0529f..e8c4e80b7 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,6 @@

-English | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) +English | [Brazilian Portuguese](README_PTBR.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) [![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) diff --git a/README_CN.md b/README_CN.md index 99fac2ae2..b2fe38fd2 100644 --- a/README_CN.md +++ b/README_CN.md @@ -1,6 +1,6 @@

-[English](README.md) | 简体中文 | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) +[English](README.md) | [Brazilian Portuguese](README_PTBR.md) | 简体中文 | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) [![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) diff --git a/README_GE.md b/README_GE.md index a8f16ad65..74769576a 100644 --- a/README_GE.md +++ b/README_GE.md @@ -1,6 +1,6 @@

-[English](README.md) | [简体中文](README_CN.md) | Deutsch | [日本語](README_JP.md) | [한국어](README_KR.md) +[English](README.md) | [Brazilian Portuguese](README_PTBR.md) | [简体中文](README_CN.md) | Deutsch | [日本語](README_JP.md) | [한국어](README_KR.md) [![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) diff --git a/README_JP.md b/README_JP.md index 86453b784..1fea3b826 100644 --- a/README_JP.md +++ b/README_JP.md @@ -1,6 +1,6 @@

-[English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 日本語 | [한국어](README_KR.md) +[English](README.md) | [Brazilian Portuguese](README_PTBR.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 日本語 | [한국어](README_KR.md) [![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) diff --git a/README_KR.md b/README_KR.md index ccb7fad5a..52c7da65f 100644 --- a/README_KR.md +++ b/README_KR.md @@ -1,6 +1,6 @@

-[English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 한국어 | [日本語](README_JP.md) +[English](README.md) | [Brazilian Portuguese](README_PTBR.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | 한국어 [![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) diff --git a/README_PTBR.md b/README_PTBR.md new file mode 100644 index 000000000..6a4973af3 --- /dev/null +++ b/README_PTBR.md @@ -0,0 +1,359 @@ +

+ +[English](README.md) | Brazilian Portuguese | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) + +[![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) +[![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) +[![Build Status](https://travis-ci.org/keon/algorithms.svg?branch=master)](https://travis-ci.org/keon/algorithms) +[![Coverage Status](https://coveralls.io/repos/github/keon/algorithms/badge.svg?branch=master)](https://coveralls.io/github/keon/algorithms?branch=master) + +Estruturas de Dados e Algoritmos Pythonicos +========================================= + +Exemplos de implementações mínimas e limpas de estruturas de dados e algoritmos em Python 3. + +## Contribuir +Obrigado pelo seu interesse em contribuir! Há muitas maneiras de contribuir para este projeto. [Comece aqui](CONTRIBUTING.md) + + +## Testes + +### Usando unittest +Para executar todos os testes, digite: + + $ python3 -m unittest discover tests + +Para executar algum teste específico, você pode fazer isso da seguinte maneira (Ex.: sort): + + $ python3 -m unittest tests.test_sort + +### Usando pytest +Para executar todos os testes, digite: + + $ python3 -m pytest tests + +## Instalar +Se você quiser usar os algoritmos da API em seu código, é tão simples quanto: + + $ pip3 install algorithms + +Você pode testar criando um arquivo python: (Ex.: usando `merge_sort` em `sort`) + +```python3 +from algorithms.sort import merge_sort + +if __name__ == "__main__": + my_list = [1, 8, 3, 5, 6] + my_list = merge_sort(my_list) + print(my_list) +``` + +## Desinstalar +Se você deseja desinstalar os algoritmos, é tão simples quanto: + + $ pip3 uninstall -y algorithms + +## Lista de Implementações + +- [arrays](algorithms/arrays) + - [delete_nth](algorithms/arrays/delete_nth.py) + - [flatten](algorithms/arrays/flatten.py) + - [garage](algorithms/arrays/garage.py) + - [josephus_problem](algorithms/arrays/josephus.py) + - [limit](algorithms/arrays/limit.py) + - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/) + - [max_ones_index](algorithms/arrays/max_ones_index.py) + - [merge_intervals](algorithms/arrays/merge_intervals.py) + - [missing_ranges](algorithms/arrays/missing_ranges.py) + - [plus_one](algorithms/arrays/plus_one.py) + - [rotate](algorithms/arrays/rotate.py) + - [summarize_ranges](algorithms/arrays/summarize_ranges.py) + - [three_sum](algorithms/arrays/three_sum.py) + - [trimmean](algorithms/arrays/trimmean.py) + - [top_1](algorithms/arrays/top_1.py) + - [two_sum](algorithms/arrays/two_sum.py) + - [move_zeros](algorithms/arrays/move_zeros.py) +- [backtrack](algorithms/backtrack) + - [general_solution.md](algorithms/backtrack/) + - [anagram](algorithms/backtrack/anagram.py) + - [array_sum_combinations](algorithms/backtrack/array_sum_combinations.py) + - [combination_sum](algorithms/backtrack/combination_sum.py) + - [expression_add_operators](algorithms/backtrack/expression_add_operators.py) + - [factor_combinations](algorithms/backtrack/factor_combinations.py) + - [generate_abbreviations](algorithms/backtrack/generate_abbreviations.py) + - [generate_parenthesis](algorithms/backtrack/generate_parenthesis.py) + - [letter_combination](algorithms/backtrack/letter_combination.py) + - [palindrome_partitioning](algorithms/backtrack/palindrome_partitioning.py) + - [pattern_match](algorithms/backtrack/pattern_match.py) + - [permute](algorithms/backtrack/permute.py) + - [permute_unique](algorithms/backtrack/permute_unique.py) + - [subsets](algorithms/backtrack/subsets.py) + - [subsets_unique](algorithms/backtrack/subsets_unique.py) +- [bfs](algorithms/bfs) + - [maze_search](algorithms/bfs/maze_search.py) + - [shortest_distance_from_all_buildings](algorithms/bfs/shortest_distance_from_all_buildings.py) + - [word_ladder](algorithms/bfs/word_ladder.py) +- [bit](algorithms/bit) + - [add_bitwise_operator](algorithms/bit/add_bitwise_operator.py) + - [bit_operation](algorithms/bit/bit_operation.py) + - [bytes_int_conversion](algorithms/bit/bytes_int_conversion.py) + - [count_flips_to_convert](algorithms/bit/count_flips_to_convert.py) + - [count_ones](algorithms/bit/count_ones.py) + - [find_difference](algorithms/bit/find_difference.py) + - [find_missing_number](algorithms/bit/find_missing_number.py) + - [flip_bit_longest_sequence](algorithms/bit/flip_bit_longest_sequence.py) + - [power_of_two](algorithms/bit/power_of_two.py) + - [reverse_bits](algorithms/bit/reverse_bits.py) + - [single_number](algorithms/bit/single_number.py) + - [single_number2](algorithms/bit/single_number2.py) + - [single_number3](algorithms/bit/single_number3.py) + - [subsets](algorithms/bit/subsets.py) + - [swap_pair](algorithms/bit/swap_pair.py) + - [has_alternative_bit](algorithms/bit/has_alternative_bit.py) + - [insert_bit](algorithms/bit/insert_bit.py) + - [remove_bit](algorithms/bit/remove_bit.py) +- [calculator](algorithms/calculator) + - [math_parser](algorithms/calculator/math_parser.py) +- [dfs](algorithms/dfs) + - [all_factors](algorithms/dfs/all_factors.py) + - [count_islands](algorithms/dfs/count_islands.py) + - [pacific_atlantic](algorithms/dfs/pacific_atlantic.py) + - [sudoku_solver](algorithms/dfs/sudoku_solver.py) + - [walls_and_gates](algorithms/dfs/walls_and_gates.py) +- [dp](algorithms/dp) + - [buy_sell_stock](algorithms/dp/buy_sell_stock.py) + - [climbing_stairs](algorithms/dp/climbing_stairs.py) + - [coin_change](algorithms/dp/coin_change.py) + - [combination_sum](algorithms/dp/combination_sum.py) + - [egg_drop](algorithms/dp/egg_drop.py) + - [house_robber](algorithms/dp/house_robber.py) + - [job_scheduling](algorithms/dp/job_scheduling.py) + - [knapsack](algorithms/dp/knapsack.py) + - [longest_increasing](algorithms/dp/longest_increasing.py) + - [matrix_chain_order](algorithms/dp/matrix_chain_order.py) + - [max_product_subarray](algorithms/dp/max_product_subarray.py) + - [max_subarray](algorithms/dp/max_subarray.py) + - [min_cost_path](algorithms/dp/min_cost_path.py) + - [num_decodings](algorithms/dp/num_decodings.py) + - [regex_matching](algorithms/dp/regex_matching.py) + - [rod_cut](algorithms/dp/rod_cut.py) + - [word_break](algorithms/dp/word_break.py) + - [fibonacci](algorithms/dp/fib.py) +- [graph](algorithms/graph) + - [check_bipartite](algorithms/graph/check_bipartite.py) + - [strongly_connected](algorithms/graph/checkDiGraphStronglyConnected.py) + - [clone_graph](algorithms/graph/clone_graph.py) + - [cycle_detection](algorithms/graph/cycle_detection.py) + - [find_all_cliques](algorithms/graph/find_all_cliques.py) + - [find_path](algorithms/graph/find_path.py) + - [graph](algorithms/graph/graph.py) + - [markov_chain](algorithms/graph/markov_chain.py) + - [minimum_spanning_tree](algorithms/graph/minimum_spanning_tree.py) + - [satisfiability](algorithms/graph/satisfiability.py) + - [tarjan](algorithms/graph/tarjan.py) + - [traversal](algorithms/graph/traversal.py) +- [heap](algorithms/heap) + - [merge_sorted_k_lists](algorithms/heap/merge_sorted_k_lists.py) + - [skyline](algorithms/heap/skyline.py) + - [sliding_window_max](algorithms/heap/sliding_window_max.py) + - [binary_heap](algorithms/heap/binary_heap.py) +- [linkedlist](algorithms/linkedlist) + - [add_two_numbers](algorithms/linkedlist/add_two_numbers.py) + - [copy_random_pointer](algorithms/linkedlist/copy_random_pointer.py) + - [delete_node](algorithms/linkedlist/delete_node.py) + - [first_cyclic_node](algorithms/linkedlist/first_cyclic_node.py) + - [is_cyclic](algorithms/linkedlist/is_cyclic.py) + - [is_palindrome](algorithms/linkedlist/is_palindrome.py) + - [kth_to_last](algorithms/linkedlist/kth_to_last.py) + - [linkedlist](algorithms/linkedlist/linkedlist.py) + - [remove_duplicates](algorithms/linkedlist/remove_duplicates.py) + - [reverse](algorithms/linkedlist/reverse.py) + - [rotate_list](algorithms/linkedlist/rotate_list.py) + - [swap_in_pairs](algorithms/linkedlist/swap_in_pairs.py) + - [is_sorted](algorithms/linkedlist/is_sorted.py) + - [remove_range](algorithms/linkedlist/remove_range.py) +- [map](algorithms/map) + - [hashtable](algorithms/map/hashtable.py) + - [separate_chaining_hashtable](algorithms/map/separate_chaining_hashtable.py) + - [longest_common_subsequence](algorithms/map/longest_common_subsequence.py) + - [randomized_set](algorithms/map/randomized_set.py) + - [valid_sudoku](algorithms/map/valid_sudoku.py) +- [maths](algorithms/maths) + - [base_conversion](algorithms/maths/base_conversion.py) + - [combination](algorithms/maths/combination.py) + - [decimal_to_binary_ip](algorithms/maths/decimal_to_binary_ip.py) + - [extended_gcd](algorithms/maths/extended_gcd.py) + - [factorial](algorithms/maths/factorial.py) + - [gcd/lcm](algorithms/maths/gcd.py) + - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py) + - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py) + - [next_bigger](algorithms/maths/next_bigger.py) + - [next_perfect_square](algorithms/maths/next_perfect_square.py) + - [nth_digit](algorithms/maths/nth_digit.py) + - [prime_check](algorithms/maths/prime_check.py) + - [primes_sieve_of_eratosthenes](algorithms/maths/primes_sieve_of_eratosthenes.py) + - [pythagoras](algorithms/maths/pythagoras.py) + - [rabin_miller](algorithms/maths/rabin_miller.py) + - [rsa](algorithms/maths/rsa.py) + - [sqrt_precision_factor](algorithms/maths/sqrt_precision_factor.py) + - [summing_digits](algorithms/maths/summing_digits.py) +- [matrix](algorithms/matrix) + - [sudoku_validator](algorithms/matrix/sudoku_validator.py) + - [bomb_enemy](algorithms/matrix/bomb_enemy.py) + - [copy_transform](algorithms/matrix/copy_transform.py) + - [count_paths](algorithms/matrix/count_paths.py) + - [matrix_rotation.txt](algorithms/matrix/matrix_rotation.txt) + - [rotate_image](algorithms/matrix/rotate_image.py) + - [search_in_sorted_matrix](algorithms/matrix/search_in_sorted_matrix.py) + - [sparse_dot_vector](algorithms/matrix/sparse_dot_vector.py) + - [sparse_mul](algorithms/matrix/sparse_mul.py) + - [spiral_traversal](algorithms/matrix/spiral_traversal.py) +- [queues](algorithms/queues) + - [max_sliding_window](algorithms/queues/max_sliding_window.py) + - [moving_average](algorithms/queues/moving_average.py) + - [queue](algorithms/queues/queue.py) + - [reconstruct_queue](algorithms/queues/reconstruct_queue.py) + - [zigzagiterator](algorithms/queues/zigzagiterator.py) +- [search](algorithms/search) + - [binary_search](algorithms/search/binary_search.py) + - [first_occurance](algorithms/search/first_occurance.py) + - [last_occurance](algorithms/search/last_occurance.py) + - [linear_search](algorithms/search/linear_search.py) + - [search_insert](algorithms/search/search_insert.py) + - [two_sum](algorithms/search/two_sum.py) + - [search_range](algorithms/search/search_range.py) + - [find_min_rotate](algorithms/search/find_min_rotate.py) + - [search_rotate](algorithms/search/search_rotate.py) + - [jump_search](algorithms/search/jump_search.py) +- [set](algorithms/set) + - [randomized_set](algorithms/set/randomized_set.py) + - [set_covering](algorithms/set/set_covering.py) +- [sort](algorithms/sort) + - [bitonic_sort](algorithms/sort/bitonic_sort.py) + - [bogo_sort](algorithms/sort/bogo_sort.py) + - [bubble_sort](algorithms/sort/bubble_sort.py) + - [bucket_sort](algorithms/sort/bucket_sort.py) + - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py) + - [comb_sort](algorithms/sort/comb_sort.py) + - [counting_sort](algorithms/sort/counting_sort.py) + - [cycle_sort](algorithms/sort/cycle_sort.py) + - [gnome_sort](algorithms/sort/gnome_sort.py) + - [heap_sort](algorithms/sort/heap_sort.py) + - [insertion_sort](algorithms/sort/insertion_sort.py) + - [meeting_rooms](algorithms/sort/meeting_rooms.py) + - [merge_sort](algorithms/sort/merge_sort.py) + - [pancake_sort](algorithms/sort/pancake_sort.py) + - [quick_sort](algorithms/sort/quick_sort.py) + - [radix_sort](algorithms/sort/radix_sort.py) + - [selection_sort](algorithms/sort/selection_sort.py) + - [shell_sort](algorithms/sort/shell_sort.py) + - [sort_colors](algorithms/sort/sort_colors.py) + - [top_sort](algorithms/sort/top_sort.py) + - [wiggle_sort](algorithms/sort/wiggle_sort.py) +- [stack](algorithms/stack) + - [longest_abs_path](algorithms/stack/longest_abs_path.py) + - [simplify_path](algorithms/stack/simplify_path.py) + - [stack](algorithms/stack/stack.py) + - [valid_parenthesis](algorithms/stack/valid_parenthesis.py) + - [stutter](algorithms/stack/stutter.py) + - [switch_pairs](algorithms/stack/switch_pairs.py) + - [is_consecutive](algorithms/stack/is_consecutive.py) + - [remove_min](algorithms/stack/remove_min.py) + - [is_sorted](algorithms/stack/is_sorted.py) +- [strings](algorithms/strings) + - [fizzbuzz](algorithms/strings/fizzbuzz.py) + - [delete_reoccurring_characters](algorithms/strings/delete_reoccurring_characters.py) + - [strip_url_params](algorithms/strings/strip_url_params.py) + - [validate_coordinates](algorithms/strings/validate_coordinates.py) + - [domain_extractor](algorithms/strings/domain_extractor.py) + - [merge_string_checker](algorithms/strings/merge_string_checker.py) + - [add_binary](algorithms/strings/add_binary.py) + - [breaking_bad](algorithms/strings/breaking_bad.py) + - [decode_string](algorithms/strings/decode_string.py) + - [encode_decode](algorithms/strings/encode_decode.py) + - [group_anagrams](algorithms/strings/group_anagrams.py) + - [int_to_roman](algorithms/strings/int_to_roman.py) + - [is_palindrome](algorithms/strings/is_palindrome.py) + - [license_number](algorithms/strings/license_number.py) + - [make_sentence](algorithms/strings/make_sentence.py) + - [multiply_strings](algorithms/strings/multiply_strings.py) + - [one_edit_distance](algorithms/strings/one_edit_distance.py) + - [rabin_karp](algorithms/strings/rabin_karp.py) + - [reverse_string](algorithms/strings/reverse_string.py) + - [reverse_vowel](algorithms/strings/reverse_vowel.py) + - [reverse_words](algorithms/strings/reverse_words.py) + - [roman_to_int](algorithms/strings/roman_to_int.py) + - [word_squares](algorithms/strings/word_squares.py) + - [unique_morse](algorithms/strings/unique_morse.py) + - [judge_circle](algorithms/strings/judge_circle.py) + - [strong_password](algorithms/strings/strong_password.py) + - [caesar_cipher](algorithms/strings/caesar_cipher.py) + - [contain_string](algorithms/strings/contain_string.py) + - [count_binary_substring](algorithms/strings/count_binary_substring.py) +- [tree](algorithms/tree) + - [bst](algorithms/tree/tree/bst) + - [array2bst](algorithms/tree/bst/array2bst.py) + - [bst_closest_value](algorithms/tree/bst/bst_closest_value.py) + - [BSTIterator](algorithms/tree/bst/BSTIterator.py) + - [delete_node](algorithms/tree/bst/delete_node.py) + - [is_bst](algorithms/tree/bst/is_bst.py) + - [kth_smallest](algorithms/tree/bst/kth_smallest.py) + - [lowest_common_ancestor](algorithms/tree/bst/lowest_common_ancestor.py) + - [predecessor](algorithms/tree/bst/predecessor.py) + - [serialize_deserialize](algorithms/tree/bst/serialize_deserialize.py) + - [successor](algorithms/tree/bst/successor.py) + - [unique_bst](algorithms/tree/bst/unique_bst.py) + - [depth_sum](algorithms/tree/bst/depth_sum.py) + - [count_left_node](algorithms/tree/bst/count_left_node.py) + - [num_empty](algorithms/tree/bst/num_empty.py) + - [height](algorithms/tree/bst/height.py) + - [red_black_tree](algorithms/tree/red_black_tree) + - [red_black_tree](algorithms/tree/red_black_tree/red_black_tree.py) + - [segment_tree](algorithms/tree/segment_tree) + - [segment_tree](algorithms/tree/segment_tree/segment_tree.py) + - [traversal](algorithms/tree/traversal) + - [inorder](algorithms/tree/traversal/inorder.py) + - [level_order](algorithms/tree/traversal/level_order.py) + - [postorder](algorithms/tree/traversal/postorder.py) + - [preorder](algorithms/tree/traversal/preorder.py) + - [zigzag](algorithms/tree/traversal/zigzag.py) + - [trie](algorithms/tree/trie) + - [add_and_search](algorithms/tree/trie/add_and_search.py) + - [trie](algorithms/tree/trie/trie.py) + - [binary_tree_paths](algorithms/tree/binary_tree_paths.py) + - [bintree2list](algorithms/tree/bintree2list.py) + - [deepest_left](algorithms/tree/deepest_left.py) + - [invert_tree](algorithms/tree/invert_tree.py) + - [is_balanced](algorithms/tree/is_balanced.py) + - [is_subtree](algorithms/tree/is_subtree.py) + - [is_symmetric](algorithms/tree/is_symmetric.py) + - [longest_consecutive](algorithms/tree/longest_consecutive.py) + - [lowest_common_ancestor](algorithms/tree/lowest_common_ancestor.py) + - [max_height](algorithms/tree/max_height.py) + - [max_path_sum](algorithms/tree/max_path_sum.py) + - [min_height](algorithms/tree/min_height.py) + - [path_sum](algorithms/tree/path_sum.py) + - [path_sum2](algorithms/tree/path_sum2.py) + - [pretty_print](algorithms/tree/pretty_print.py) + - [same_tree](algorithms/tree/same_tree.py) + - [tree](algorithms/tree/tree.py) +- [unix](algorithms/unix) + - [path](algorithms/unix/path/) + - [join_with_slash](algorithms/unix/path/join_with_slash.py) + - [full_path](algorithms/unix/path/full_path.py) + - [split](algorithms/unix/path/split.py) +- [union-find](algorithms/union-find) + - [count_islands](algorithms/union-find/count_islands.py) + +## Contribuidores +O repositório é mantido por + +* [Keon Kim](https://github.com/keon) +* [Rahul Goswami](https://github.com/goswami-rahul) +* [Christian Bender](https://github.com/christianbender) +* [Ankit Agarwal](https://github.com/ankit167) +* [Hai Hoang Dang](https://github.com/danghai) +* [Saad](https://github.com/SaadBenn) + +Obrigado a [todos os contribuidores](https://github.com/keon/algorithms/graphs/contributors) +que ajudaram na construção do repositório. From 78fc4a0535cdfd0669f1db60087a5ef706fc7ac6 Mon Sep 17 00:00:00 2001 From: Edilson Alves Date: Mon, 9 Jul 2018 07:44:01 -0300 Subject: [PATCH 367/387] Corrected language title (#372) --- README.md | 3 +-- README_CN.md | 2 +- README_GE.md | 4 ++-- README_JP.md | 2 +- README_KR.md | 3 +-- README_PTBR.md | 3 +-- 6 files changed, 7 insertions(+), 10 deletions(-) diff --git a/README.md b/README.md index e8c4e80b7..8a0ef8e61 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,6 @@

-English | [Brazilian Portuguese](README_PTBR.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) +English | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) | [Português](README_PTBR.md) [![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) @@ -15,7 +15,6 @@ Minimal and clean example implementations of data structures and algorithms in P ## Contributing Thanks for your interest in contributing! There are many ways to contribute to this project. [Get started here](CONTRIBUTING.md) - ## Tests ### Use unittest diff --git a/README_CN.md b/README_CN.md index b2fe38fd2..f3dc87fe9 100644 --- a/README_CN.md +++ b/README_CN.md @@ -1,6 +1,6 @@

-[English](README.md) | [Brazilian Portuguese](README_PTBR.md) | 简体中文 | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) +[English](README.md) | 简体中文 | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) | [Português](README_PTBR.md) [![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) diff --git a/README_GE.md b/README_GE.md index 74769576a..226deee2c 100644 --- a/README_GE.md +++ b/README_GE.md @@ -1,6 +1,6 @@

-[English](README.md) | [Brazilian Portuguese](README_PTBR.md) | [简体中文](README_CN.md) | Deutsch | [日本語](README_JP.md) | [한국어](README_KR.md) +[English](README.md) | [简体中文](README_CN.md) | Deutsch | [日本語](README_JP.md) | [한국어](README_KR.md) | [Português](README_PTBR.md) [![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) @@ -14,7 +14,7 @@ In diesem Repository finden Sie eine große Auswahl an Algorithmen und Datenstru ## Beteiligen -Sie können sich gerne auch an diesem Projekt beteiligen. Zum Beispiel selbst Algorithmen und Datenstrukturen beisteuern, oder bereits bestehende Implementierungen verbessern, oder auch dokumentieren. Fühlen Sie sich frei und machen Sie einen Pull-Request. Alternativ können Sie auch den Issue-Tracker benutzen um auf Probleme (Bugs) in bereits bestehenden Implementierungen hinzuweisen. +Sie können sich gerne auch an diesem Projekt beteiligen. Zum Beispiel selbst Algorithmen und Datenstrukturen beisteuern, oder bereits bestehende Implementierungen verbessern, oder auch dokumentieren. Fühlen Sie sich frei und machen Sie einen Pull-Request. Alternativ können Sie auch den Issue-Tracker benutzen um auf Probleme (Bugs) in bereits bestehenden Implementierungen hinzuweisen. In diesem Projekt halten wir uns an die [PEP8](https://www.python.org/dev/peps/pep-0008/) Codestyle Konventionen. diff --git a/README_JP.md b/README_JP.md index 1fea3b826..7e3062e1d 100644 --- a/README_JP.md +++ b/README_JP.md @@ -1,6 +1,6 @@

-[English](README.md) | [Brazilian Portuguese](README_PTBR.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 日本語 | [한국어](README_KR.md) +[English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 日本語 | [한국어](README_KR.md) | [Português](README_PTBR.md) [![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) diff --git a/README_KR.md b/README_KR.md index 52c7da65f..91bfc0a38 100644 --- a/README_KR.md +++ b/README_KR.md @@ -1,6 +1,6 @@

-[English](README.md) | [Brazilian Portuguese](README_PTBR.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | 한국어 +[English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | 한국어 | [Português](README_PTBR.md) [![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) @@ -15,7 +15,6 @@ Python 3로 구현한 간단하고 명확한 자료구조와 알고리즘들의 ## 기여 활동 프로젝트 활동 참여에 관심을 가져주셔서 감사합니다! 여러가지 방법으로 이 프로젝트에 기여해주세요. [기여 방법 소개](CONTRIBUTING.md) - ## 테스트 종류들 ### unittest 사용 diff --git a/README_PTBR.md b/README_PTBR.md index 6a4973af3..2a9e05fba 100644 --- a/README_PTBR.md +++ b/README_PTBR.md @@ -1,6 +1,6 @@

-[English](README.md) | Brazilian Portuguese | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) +[English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) | Português [![PyPI version](https://badge.fury.io/py/algorithms.svg)](https://badge.fury.io/py/algorithms) [![Open Source Helpers](https://www.codetriage.com/keon/algorithms/badges/users.svg)](https://www.codetriage.com/keon/algorithms) @@ -15,7 +15,6 @@ Exemplos de implementações mínimas e limpas de estruturas de dados e algoritm ## Contribuir Obrigado pelo seu interesse em contribuir! Há muitas maneiras de contribuir para este projeto. [Comece aqui](CONTRIBUTING.md) - ## Testes ### Usando unittest From 77e8af74c58d0d0ba20507b49bd3e6f58de84dcb Mon Sep 17 00:00:00 2001 From: LJX <335272236@qq.com> Date: Tue, 10 Jul 2018 21:11:44 +0800 Subject: [PATCH 368/387] added text_justification with tests (#371) * add text_justification and test text_justification * add text_justification and test text_justification --- algorithms/strings/__init__.py | 1 + algorithms/strings/text_justification.py | 89 ++++++++++++++++++++++++ tests/test_strings.py | 65 ++++++++++++++--- 3 files changed, 144 insertions(+), 11 deletions(-) create mode 100644 algorithms/strings/text_justification.py diff --git a/algorithms/strings/__init__.py b/algorithms/strings/__init__.py index 4040c9e85..4f4f20c7a 100644 --- a/algorithms/strings/__init__.py +++ b/algorithms/strings/__init__.py @@ -28,3 +28,4 @@ from .contain_string import * from .count_binary_substring import * from .repeat_string import * +from .text_justification import * \ No newline at end of file diff --git a/algorithms/strings/text_justification.py b/algorithms/strings/text_justification.py new file mode 100644 index 000000000..a14a8ba39 --- /dev/null +++ b/algorithms/strings/text_justification.py @@ -0,0 +1,89 @@ +""" +Given an array of words and a width maxWidth, format the text such that each line +has exactly maxWidth characters and is fully (left and right) justified. + +You should pack your words in a greedy approach; that is, pack as many words as +you can in each line. Pad extra spaces ' ' when necessary so that each line has +exactly maxWidth characters. + +Extra spaces between words should be distributed as evenly as possible. If the +number of spaces on a line do not divide evenly between words, the empty slots +on the left will be assigned more spaces than the slots on the right. + +For the last line of text, it should be left justified and no extra space is +inserted between words. + +Note: +A word is defined as a character sequence consisting of non-space characters only. +Each word's length is guaranteed to be greater than 0 and not exceed maxWidth. +The input array words contains at least one word. + +Example: +Input: +words = ["What","must","be","acknowledgment","shall","be"] +maxWidth = 16 +Output: +[ + "What must be", + "acknowledgment ", + "shall be " +] +""" + + +def text_justification(words, max_width): + ''' + :type words: list + :type max_width: int + :rtype: list + ''' + ret = [] # return value + row_len = 0 # current length of strs in a row + row_words = [] # current words in a row + index = 0 # the index of current word in words + is_first_word = True # is current word the first in a row + while index < len(words): + while row_len <= max_width and index < len(words): + if len(words[index]) > max_width: + raise ValueError("there exists word whose length is larger than max_width") + tmp = row_len + row_words.append(words[index]) + tmp += len(words[index]) + if not is_first_word: + tmp += 1 # except for the first word, each word should have at least a ' ' before it. + if tmp > max_width: + row_words.pop() + break + row_len = tmp + index += 1 + is_first_word = False + # here we have already got a row of str , then we should supplement enough ' ' to make sure the length is max_width. + row = "" + # if the row is the last + if index == len(words): + for word in row_words: + row += (word + ' ') + row = row[:-1] + row += ' ' * (max_width - len(row)) + # not the last row and more than one word + elif len(row_words) != 1: + space_num = max_width - row_len + space_num_of_each_interval = space_num // (len(row_words) - 1) + space_num_rest = space_num - space_num_of_each_interval * (len(row_words) - 1) + for j in range(len(row_words)): + row += row_words[j] + if j != len(row_words) - 1: + row += ' ' * (1 + space_num_of_each_interval) + if space_num_rest > 0: + row += ' ' + space_num_rest -= 1 + # row with only one word + else: + row += row_words[0] + row += ' ' * (max_width - len(row)) + ret.append(row) + # after a row , reset those value + row_len = 0 + row_words = [] + is_first_word = True + return ret diff --git a/tests/test_strings.py b/tests/test_strings.py index c8b918280..be44fb93c 100644 --- a/tests/test_strings.py +++ b/tests/test_strings.py @@ -30,7 +30,8 @@ caesar_cipher, contain_string, count_binary_substring, - repeat_string + repeat_string, + text_justification ) import unittest @@ -62,10 +63,13 @@ def setUp(self): self.words = ['Amazon', 'Microsoft', 'Google'] self.symbols = ['i', 'Am', 'cro', 'le', 'abc'] self.result = ['M[i]crosoft', '[Am]azon', 'Mi[cro]soft', 'Goog[le]'] + def test_match_symbol(self): - self.assertEqual(self.result, match_symbol(self.words,self.symbols)) + self.assertEqual(self.result, match_symbol(self.words, self.symbols)) + def test_match_symbol_1(self): - self.assertEqual(['[Am]azon', 'Mi[cro]soft', 'Goog[le]'], match_symbol_1(self.words,self.symbols)) + self.assertEqual(['[Am]azon', 'Mi[cro]soft', 'Goog[le]'], match_symbol_1(self.words, self.symbols)) + def test_bracket(self): self.assertEqual(('[Am]azon', 'Mi[cro]soft', 'Goog[le]'), bracket(self.words, self.symbols)) @@ -105,6 +109,7 @@ class TestDomainExtractor(unittest.TestCase): def test_valid(self): self.assertEqual(domain_name_1("https://github.com/SaadBenn"), "github") + def test_invalid(self): self.assertEqual(domain_name_2("http://google.com"), "google") @@ -119,6 +124,7 @@ class TestEncodeDecode(unittest.TestCase): def test_encode(self): self.assertEqual("4:keon2:is7:awesome", encode("keon is awesome")) + def test_decode(self): self.assertEqual(['keon', 'is', 'awesome'], decode("4:keon2:is7:awesome")) @@ -133,7 +139,7 @@ class TestGroupAnagrams(unittest.TestCase): def test_group_anagrams(self): self.assertEqual([['eat', 'tea', 'ate'], ['tan', 'nat'], ['bat']], \ - group_anagrams(["eat", "tea", "tan", "ate", "nat", "bat"])) + group_anagrams(["eat", "tea", "tan", "ate", "nat", "bat"])) class TestIntToRoman(unittest.TestCase): @@ -162,14 +168,17 @@ def test_is_palindrome(self): # 'Otto' is a old german name. self.assertTrue(is_palindrome("Otto")) self.assertFalse(is_palindrome("house")) + def test_is_palindrome_reverse(self): # 'Otto' is a old german name. self.assertTrue(is_palindrome_reverse("Otto")) self.assertFalse(is_palindrome_reverse("house")) + def test_is_palindrome_two_pointer(self): # 'Otto' is a old german name. self.assertTrue(is_palindrome_two_pointer("Otto")) self.assertFalse(is_palindrome_two_pointer("house")) + def test_is_palindrome_stack(self): # 'Otto' is a old german name. self.assertTrue(is_palindrome_stack("Otto")) @@ -232,6 +241,7 @@ class TestMergeStringChecker(unittest.TestCase): def test_is_merge_recursive(self): self.assertTrue(is_merge_recursive("codewars", "cdw", "oears")) + def test_is_merge_iterative(self): self.assertTrue(is_merge_iterative("codewars", "cdw", "oears")) @@ -263,6 +273,7 @@ def test_is_one_edit(self): self.assertTrue(is_one_edit("abc", "abd")) self.assertFalse(is_one_edit("abc", "aed")) self.assertFalse(is_one_edit("abcd", "abcd")) + def test_is_one_edit2(self): self.assertTrue(is_one_edit2("abc", "abd")) self.assertFalse(is_one_edit2("abc", "aed")) @@ -292,10 +303,13 @@ class TestReverseString(unittest.TestCase): def test_recursive(self): self.assertEqual("ereht olleh", recursive("hello there")) + def test_iterative(self): self.assertEqual("ereht olleh", iterative("hello there")) + def test_pythonic(self): self.assertEqual("ereht olleh", pythonic("hello there")) + def test_ultra_pythonic(self): self.assertEqual("ereht olleh", ultra_pythonic("hello there")) @@ -322,7 +336,7 @@ class TestReverseWords(unittest.TestCase): def test_reverse_words(self): self.assertEqual("pizza like I and kim keon am I", \ - reverse_words("I am keon kim and I like pizza")) + reverse_words("I am keon kim and I like pizza")) class TestRomanToInt(unittest.TestCase): @@ -367,11 +381,12 @@ class TestValidateCoordinates(unittest.TestCase): """ def test_valid(self): - valid_coordinates = ["-23, 25","4, -3","90, 180","-90, -180"] + valid_coordinates = ["-23, 25", "4, -3", "90, 180", "-90, -180"] for coordinate in valid_coordinates: self.assertTrue(is_valid_coordinates_0(coordinate)) + def test_invalid(self): - invalid_coordinates = ["23.234, - 23.4234","99.234, 12.324","6.325624, 43.34345.345","0, 1,2","23.245, 1e1"] + invalid_coordinates = ["23.234, - 23.4234", "99.234, 12.324", "6.325624, 43.34345.345", "0, 1,2", "23.245, 1e1"] for coordinate in invalid_coordinates: self.assertFalse(is_valid_coordinates_0(coordinate)) @@ -386,46 +401,74 @@ class TestWordSquares(unittest.TestCase): def test_word_squares(self): self.assertEqual([['wall', 'area', 'lead', 'lady'], ['ball', 'area', 'lead', 'lady']], \ - word_squares(["area","lead","wall","lady","ball"])) + word_squares(["area", "lead", "wall", "lady", "ball"])) + class TestUniqueMorse(unittest.TestCase): def test_convert_morse_word(self): self.assertEqual("--...-.", convert_morse_word("gin")) self.assertEqual("--...--.", convert_morse_word("msg")) + def test_unique_morse(self): self.assertEqual(2, unique_morse(["gin", "zen", "gig", "msg"])) + class TestJudgeCircle(unittest.TestCase): def test_judge_circle(self): self.assertTrue(judge_circle("UDLRUD")) self.assertFalse(judge_circle("LLRU")) + class TestStrongPassword(unittest.TestCase): def test_strong_password(self): - self.assertEqual(3, strong_password(3,"Ab1")) - self.assertEqual(1, strong_password(11,"#Algorithms")) + self.assertEqual(3, strong_password(3, "Ab1")) + self.assertEqual(1, strong_password(11, "#Algorithms")) + class TestCaesarCipher(unittest.TestCase): def test_caesar_cipher(self): self.assertEqual("Lipps_Asvph!", caesar_cipher("Hello_World!", 4)) self.assertEqual("okffng-Qwvb", caesar_cipher("middle-Outz", 2)) + class TestContainString(unittest.TestCase): def test_contain_string(self): self.assertEqual(-1, contain_string("mississippi", "issipi")) self.assertEqual(0, contain_string("Hello World", "")) self.assertEqual(2, contain_string("hello", "ll")) + class TestCountBinarySubstring(unittest.TestCase): def test_count_binary_substring(self): self.assertEqual(6, count_binary_substring("00110011")) self.assertEqual(4, count_binary_substring("10101")) self.assertEqual(3, count_binary_substring("00110")) + class TestCountBinarySubstring(unittest.TestCase): def test_repeat_string(self): - self.assertEqual(3, repeat_string("abcd","cdabcdab")) + self.assertEqual(3, repeat_string("abcd", "cdabcdab")) self.assertEqual(4, repeat_string("bb", "bbbbbbb")) + +class TestTextJustification(unittest.TestCase): + def test_text_justification(self): + self.assertEqual(["This is an", + "example of text", + "justification. "], + + text_justification(["This", "is", "an", "example", "of", "text", "justification."] + , 16) + ) + + self.assertEqual(["What must be", + "acknowledgment ", + "shall be "], + + text_justification(["What", "must", "be", "acknowledgment", "shall", "be"] + , 16) + ) + + if __name__ == "__main__": unittest.main() From 77054e71123a7d65485a92c85a990301475e8152 Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Wed, 18 Jul 2018 02:31:03 -0700 Subject: [PATCH 369/387] PR to add some problem. (#375) * Add next_greatest_letter to search * Move top sort test into test_sort * Add min_distance to string * Add binary_gap to bit --- README.md | 3 ++ algorithms/bit/__init__.py | 1 + algorithms/bit/binary_gap.py | 27 ++++++++++ algorithms/search/__init__.py | 1 + algorithms/search/next_greatest_letter.py | 60 +++++++++++++++++++++++ algorithms/strings/__init__.py | 3 +- algorithms/strings/min_distance.py | 28 +++++++++++ tests/graph/__init__.py | 1 - tests/graph/test_topsort.py | 27 ---------- tests/test_bit.py | 13 ++++- tests/test_search.py | 24 +++++++-- tests/test_sort.py | 34 ++++++++++--- tests/test_strings.py | 8 ++- 13 files changed, 189 insertions(+), 41 deletions(-) create mode 100644 algorithms/bit/binary_gap.py create mode 100644 algorithms/search/next_greatest_letter.py create mode 100644 algorithms/strings/min_distance.py delete mode 100644 tests/graph/__init__.py delete mode 100644 tests/graph/test_topsort.py diff --git a/README.md b/README.md index 8a0ef8e61..d918575e2 100644 --- a/README.md +++ b/README.md @@ -112,6 +112,7 @@ If you want to uninstall algorithms, it is as simple as: - [has_alternative_bit](algorithms/bit/has_alternative_bit.py) - [insert_bit](algorithms/bit/insert_bit.py) - [remove_bit](algorithms/bit/remove_bit.py) + - [binary_gap](algorithms/bit/binary_gap.py) - [calculator](algorithms/calculator) - [math_parser](algorithms/calculator/math_parser.py) - [dfs](algorithms/dfs) @@ -226,6 +227,7 @@ If you want to uninstall algorithms, it is as simple as: - [find_min_rotate](algorithms/search/find_min_rotate.py) - [search_rotate](algorithms/search/search_rotate.py) - [jump_search](algorithms/search/jump_search.py) + - [next_greatest_letter](algorithms/search/next_greatest_letter.py) - [set](algorithms/set) - [randomized_set](algorithms/set/randomized_set.py) - [set_covering](algorithms/set/set_covering.py) @@ -292,6 +294,7 @@ If you want to uninstall algorithms, it is as simple as: - [contain_string](algorithms/strings/contain_string.py) - [count_binary_substring](algorithms/strings/count_binary_substring.py) - [repeat_string](algorithms/strings/repeat_string.py) + - [min_distance](algorithms/strings/min_distance.py) - [tree](algorithms/tree) - [bst](algorithms/tree/tree/bst) - [array2bst](algorithms/tree/bst/array2bst.py) diff --git a/algorithms/bit/__init__.py b/algorithms/bit/__init__.py index 383923d46..617f5006f 100644 --- a/algorithms/bit/__init__.py +++ b/algorithms/bit/__init__.py @@ -15,3 +15,4 @@ from .remove_bit import * from .count_flips_to_convert import * from .flip_bit_longest_sequence import * +from .binary_gap import * diff --git a/algorithms/bit/binary_gap.py b/algorithms/bit/binary_gap.py new file mode 100644 index 000000000..75a1233b5 --- /dev/null +++ b/algorithms/bit/binary_gap.py @@ -0,0 +1,27 @@ +""" +Given a positive integer N, find and return the longest distance between two +consecutive 1' in the binary representation of N. +If there are not two consecutive 1's, return 0 + +For example: +Input: 22 +Output: 2 +Explanation: +22 in binary is 10110 +In the binary representation of 22, there are three ones, and two consecutive pairs of 1's. +The first consecutive pair of 1's have distance 2. +The second consecutive pair of 1's have distance 1. +The answer is the largest of these two distances, which is 2 +""" +def binary_gap(N): + last = None + ans = 0 + index = 0 + while N != 0: + if N & 1: + if last is not None: + ans = max(ans, index - last) + last = index + index = index + 1 + N = N >> 1 + return ans diff --git a/algorithms/search/__init__.py b/algorithms/search/__init__.py index 8304059e9..ac5220b38 100644 --- a/algorithms/search/__init__.py +++ b/algorithms/search/__init__.py @@ -8,3 +8,4 @@ from .find_min_rotate import * from .search_rotate import * from .jump_search import * +from .next_greatest_letter import * diff --git a/algorithms/search/next_greatest_letter.py b/algorithms/search/next_greatest_letter.py new file mode 100644 index 000000000..5abe001cd --- /dev/null +++ b/algorithms/search/next_greatest_letter.py @@ -0,0 +1,60 @@ +''' +Given a list of sorted characters letters containing only lowercase letters, +and given a target letter target, find the smallest element in the list that +is larger than the given target. + +Letters also wrap around. For example, if the target is target = 'z' and +letters = ['a', 'b'], the answer is 'a'. + +Input: +letters = ["c", "f", "j"] +target = "a" +Output: "c" + +Input: +letters = ["c", "f", "j"] +target = "c" +Output: "f" + +Input: +letters = ["c", "f", "j"] +target = "d" +Output: "f" + +Reference: https://leetcode.com/problems/find-smallest-letter-greater-than-target/description/ +''' + +import bisect + +""" +Using bisect libarary +""" +def next_greatest_letter(letters, target): + index = bisect.bisect(letters, target) + return letters[index % len(letters)] + +""" +Using binary search: complexity O(logN) +""" +def next_greatest_letter_v1(letters, target): + if letters[0] > target: + return letters[0] + if letters[len(letters) - 1] <= target: + return letters[0] + left, right = 0, len(letters) - 1 + while left <= right: + mid = left + (right - left) // 2 + if letters[mid] > target: + right = mid - 1 + else: + left = mid + 1 + return letters[left] + +""" +Brute force: complexity O(N) +""" +def next_greatest_letter_v2(letters, target): + for index in letters: + if index > target: + return index + return letters[0] diff --git a/algorithms/strings/__init__.py b/algorithms/strings/__init__.py index 4f4f20c7a..d7ae4b673 100644 --- a/algorithms/strings/__init__.py +++ b/algorithms/strings/__init__.py @@ -28,4 +28,5 @@ from .contain_string import * from .count_binary_substring import * from .repeat_string import * -from .text_justification import * \ No newline at end of file +from .text_justification import * +from .min_distance import * diff --git a/algorithms/strings/min_distance.py b/algorithms/strings/min_distance.py new file mode 100644 index 000000000..4e80f471f --- /dev/null +++ b/algorithms/strings/min_distance.py @@ -0,0 +1,28 @@ +""" +Given two words word1 and word2, find the minimum number of steps required to +make word1 and word2 the same, where in each step you can delete one character +in either string. + +For example: +Input: "sea", "eat" +Output: 2 +Explanation: You need one step to make "sea" to "ea" and another step to make "eat" to "ea". + +Reference: https://leetcode.com/problems/delete-operation-for-two-strings/description/ +""" + +def min_distance(word1, word2): + return len(word1) + len(word2) - 2 * lcs(word1, word2, len(word1), len(word2)) + +def lcs(s1, s2, i, j): + """ + The length of longest common subsequence among the two given strings s1 and s2 + """ + if i == 0 or j == 0: + return 0 + elif s1[i - 1] == s2[j - 1]: + return 1 + lcs(s1, s2, i - 1, j - 1) + else: + return max(lcs(s1, s2, i - 1, j), lcs(s1, s2, i, j - 1)) + +# TODO: Using dynamic programming diff --git a/tests/graph/__init__.py b/tests/graph/__init__.py deleted file mode 100644 index 8b1378917..000000000 --- a/tests/graph/__init__.py +++ /dev/null @@ -1 +0,0 @@ - diff --git a/tests/graph/test_topsort.py b/tests/graph/test_topsort.py deleted file mode 100644 index a308ed306..000000000 --- a/tests/graph/test_topsort.py +++ /dev/null @@ -1,27 +0,0 @@ -from algorithms.sort import ( - top_sort, top_sort_recursive -) - -import unittest - -class TestSuite(unittest.TestCase): - def setUp(self): - self.depGraph = { - "a" : [ "b" ], - "b" : [ "c" ], - "c" : [ 'e'], - 'e' : [ 'g' ], - "d" : [ ], - "f" : ["e" , "d"], - "g" : [ ] - } - - def test_topsort(self): - res = top_sort_recursive(self.depGraph) - #print(res) - self.assertTrue(res.index('g') < res.index('e')) - res = top_sort(self.depGraph) - self.assertTrue(res.index('g') < res.index('e')) - -if __name__ == '__main__': - unittest.main() diff --git a/tests/test_bit.py b/tests/test_bit.py index fdc80a18e..acfb4b035 100644 --- a/tests/test_bit.py +++ b/tests/test_bit.py @@ -15,7 +15,8 @@ find_difference, has_alternative_bit, has_alternative_bit_fast, insert_one_bit, insert_mult_bits, - remove_bit + remove_bit, + binary_gap ) import unittest @@ -238,6 +239,16 @@ def test_remove_bit(self): self.assertEqual(5, remove_bit(21, 4)) self.assertEqual(10, remove_bit(21, 0)) + def test_binary_gap(self): + # 22 = 10110 + self.assertEqual(2, binary_gap(22)) + # 6 = 110 + self.assertEqual(1, binary_gap(6)) + # 8 = 1000 + self.assertEqual(0, binary_gap(8)) + # 145 = 10010001 + self.assertEqual(4, binary_gap(145)) + if __name__ == '__main__': unittest.main() diff --git a/tests/test_search.py b/tests/test_search.py index 4f869fe18..60d8919f7 100644 --- a/tests/test_search.py +++ b/tests/test_search.py @@ -8,7 +8,8 @@ search_range, find_min_rotate, find_min_rotate_recur, search_rotate, search_rotate_recur, - jump_search + jump_search, + next_greatest_letter, next_greatest_letter_v1, next_greatest_letter_v2 ) import unittest @@ -46,7 +47,7 @@ def test_last_occurrence(self): self.assertEqual(None, last_occurrence(array, 7)) self.assertEqual(0, last_occurrence(array, 1)) self.assertEqual(13, last_occurrence(array, 6)) - + def test_linear_search(self): array = [1, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 6, 6, 6] self.assertEqual(6, linear_search(array, 4)) @@ -103,7 +104,24 @@ def test_jump_search(self): self.assertEqual(2, jump_search(array, 3)) self.assertEqual(-1, jump_search(array, 7)) self.assertEqual(-1, jump_search(array, -1)) - + + def test_next_greatest_letter(self): + letters = ["c", "f", "j"] + target = "a" + self.assertEqual("c", next_greatest_letter(letters, target)) + self.assertEqual("c", next_greatest_letter_v1(letters, target)) + self.assertEqual("c", next_greatest_letter_v2(letters, target)) + letters = ["c", "f", "j"] + target = "d" + self.assertEqual("f", next_greatest_letter(letters, target)) + self.assertEqual("f", next_greatest_letter_v1(letters, target)) + self.assertEqual("f", next_greatest_letter_v2(letters, target)) + letters = ["c", "f", "j"] + target = "j" + self.assertEqual("c", next_greatest_letter(letters, target)) + self.assertEqual("c", next_greatest_letter_v1(letters, target)) + self.assertEqual("c", next_greatest_letter_v2(letters, target)) + if __name__ == '__main__': unittest.main() diff --git a/tests/test_sort.py b/tests/test_sort.py index d77f086d9..650f33920 100644 --- a/tests/test_sort.py +++ b/tests/test_sort.py @@ -16,6 +16,7 @@ radix_sort, gnome_sort, cocktail_shaker_sort, + top_sort, top_sort_recursive ) import unittest @@ -25,15 +26,15 @@ class TestSuite(unittest.TestCase): def test_bogo_sort(self): self.assertEqual([1, 5, 23], bogo_sort([1, 23, 5])) - + def test_bitonic_sort(self): self.assertEqual([1, 2, 3, 5, 23, 57, 65, 1232], bitonic_sort([1, 3, 2, 5, 65, 23, 57, 1232])) self.assertEqual([1, 2, 3, 5, 23, 57, 65, 1232], bitonic_sort([1, 3, 2, 5, 65, 23, 57, 1232],False)) self.assertEqual([1232, 65, 57, 23, 5, 3, 2, 1], - bitonic_sort([1, 2, 3, 5, 65, 23, 57, 1232],True)) - + bitonic_sort([1, 2, 3, 5, 65, 23, 57, 1232],True)) + def test_bubble_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], bubble_sort([1, 5, 65, 23, 57, 1232])) @@ -69,7 +70,7 @@ def test_merge_sort(self): def test_pancake_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], pancake_sort([1, 5, 65, 23, 57, 1232])) - + def test_quick_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], quick_sort([1, 5, 65, 23, 57, 1232])) @@ -85,19 +86,38 @@ def test_bucket_sort(self): def test_shell_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], shell_sort([1, 5, 65, 23, 57, 1232])) - + def test_radix_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], radix_sort([1, 5, 65, 23, 57, 1232])) - + def test_gnome_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], gnome_sort([1, 5, 65, 23, 57, 1232])) - + def test_cocktail_shaker_sort(self): self.assertEqual([1, 5, 23, 57, 65, 1232], cocktail_shaker_sort([1, 5, 65, 23, 57, 1232])) +class TestTopSort(unittest.TestCase): + def setUp(self): + self.depGraph = { + "a" : [ "b" ], + "b" : [ "c" ], + "c" : [ 'e'], + 'e' : [ 'g' ], + "d" : [ ], + "f" : ["e" , "d"], + "g" : [ ] + } + + def test_topsort(self): + res = top_sort_recursive(self.depGraph) + #print(res) + self.assertTrue(res.index('g') < res.index('e')) + res = top_sort(self.depGraph) + self.assertTrue(res.index('g') < res.index('e')) + if __name__ == "__main__": unittest.main() diff --git a/tests/test_strings.py b/tests/test_strings.py index be44fb93c..0c77ac12a 100644 --- a/tests/test_strings.py +++ b/tests/test_strings.py @@ -31,7 +31,8 @@ contain_string, count_binary_substring, repeat_string, - text_justification + text_justification, + min_distance ) import unittest @@ -469,6 +470,11 @@ def test_text_justification(self): , 16) ) +class TestMinDistance(unittest.TestCase): + def test_min_distance(self): + self.assertEqual(2, min_distance("sea", "eat")) + self.assertEqual(6, min_distance("abAlgocrithmf", "Algorithmmd")) + if __name__ == "__main__": unittest.main() From 73918832b93840b452c9db34446b7382de83e912 Mon Sep 17 00:00:00 2001 From: "Jibbie R. Eguna" <35353768+jbeguna04@users.noreply.github.com> Date: Thu, 19 Jul 2018 01:48:08 +0800 Subject: [PATCH 370/387] Logo Designs (#376) * Create add * Add files via upload * Update README.md * Update README.md * Update README.md --- LogoDesins/128pxblack.png | Bin 0 -> 1317 bytes LogoDesins/128pxblack.svg | 10 +++++++++ LogoDesins/128pxblue.png | Bin 0 -> 1600 bytes LogoDesins/128pxblue.svg | 13 +++++++++++ LogoDesins/128pxorange.png | Bin 0 -> 1603 bytes LogoDesins/128pxorange.svg | 13 +++++++++++ LogoDesins/256pxblack.png | Bin 0 -> 3194 bytes LogoDesins/256pxblack.svg | 10 +++++++++ LogoDesins/256pxblue.png | Bin 0 -> 3233 bytes LogoDesins/256pxblue.svg | 13 +++++++++++ LogoDesins/256pxorange.png | Bin 0 -> 3234 bytes LogoDesins/256pxorange.svg | 13 +++++++++++ LogoDesins/512pxblack.png | Bin 0 -> 6779 bytes LogoDesins/512pxblack.svg | 10 +++++++++ LogoDesins/512pxblue.png | Bin 0 -> 6605 bytes LogoDesins/512pxblue.svg | 13 +++++++++++ LogoDesins/512pxorange.png | Bin 0 -> 6582 bytes LogoDesins/512pxorange.svg | 13 +++++++++++ LogoDesins/add | 1 + LogoDesins/logotype1black.png | Bin 0 -> 7616 bytes LogoDesins/logotype1black.svg | 33 ++++++++++++++++++++++++++++ LogoDesins/logotype1blue.png | Bin 0 -> 7535 bytes LogoDesins/logotype1blue.svg | 38 +++++++++++++++++++++++++++++++++ LogoDesins/logotype1orange.png | Bin 0 -> 7509 bytes LogoDesins/logotype1orange.svg | 38 +++++++++++++++++++++++++++++++++ LogoDesins/logotype2black.png | Bin 0 -> 4357 bytes LogoDesins/logotype2black.svg | 32 +++++++++++++++++++++++++++ LogoDesins/logotype2blue.png | Bin 0 -> 4403 bytes LogoDesins/logotype2blue.svg | 35 ++++++++++++++++++++++++++++++ LogoDesins/logotype2orange.png | Bin 0 -> 4368 bytes LogoDesins/logotype2orange.svg | 35 ++++++++++++++++++++++++++++++ README.md | 2 +- 32 files changed, 321 insertions(+), 1 deletion(-) create mode 100644 LogoDesins/128pxblack.png create mode 100644 LogoDesins/128pxblack.svg create mode 100644 LogoDesins/128pxblue.png create mode 100644 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+

English | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) | [Português](README_PTBR.md) From 966cece43ef611843678e3be2739bdea0524407c Mon Sep 17 00:00:00 2001 From: danghai Date: Wed, 18 Jul 2018 12:21:28 -0700 Subject: [PATCH 371/387] Remove undesirable output on runnint tests Fixed #377 --- algorithms/backtrack/subsets.py | 5 ----- algorithms/backtrack/subsets_unique.py | 5 ----- algorithms/bfs/shortest_distance_from_all_buildings.py | 3 --- 3 files changed, 13 deletions(-) diff --git a/algorithms/backtrack/subsets.py b/algorithms/backtrack/subsets.py index a11c3c931..1c443024f 100644 --- a/algorithms/backtrack/subsets.py +++ b/algorithms/backtrack/subsets.py @@ -57,8 +57,3 @@ def subsets_v2(self, nums): for num in sorted(nums): res += [item+[num] for item in res] return res - - -test = [1, 2, 3] -print(test) -print(subsets(test)) diff --git a/algorithms/backtrack/subsets_unique.py b/algorithms/backtrack/subsets_unique.py index a99f25c35..da73a25ca 100644 --- a/algorithms/backtrack/subsets_unique.py +++ b/algorithms/backtrack/subsets_unique.py @@ -35,8 +35,3 @@ def backtrack(res, nums, stack, pos): res = set() backtrack(res, nums, [], 0) return list(res) - - -test = [1, 2, 2] -print(test) -print(subsets_unique(test)) diff --git a/algorithms/bfs/shortest_distance_from_all_buildings.py b/algorithms/bfs/shortest_distance_from_all_buildings.py index 48c41d063..4d4249cd2 100644 --- a/algorithms/bfs/shortest_distance_from_all_buildings.py +++ b/algorithms/bfs/shortest_distance_from_all_buildings.py @@ -38,6 +38,3 @@ def bfs(grid, matrix, i, j, count): matrix[k][l][0] += step+1 matrix[k][l][1] = count+1 q.append((k, l, step+1)) - -grid = [[1,0,2,0,1],[0,0,0,0,0],[0,0,1,0,0]] -print(shortest_distance(grid)) From b47e9d627160e42cb7a34920da4cf50f7c517a96 Mon Sep 17 00:00:00 2001 From: danghai Date: Thu, 19 Jul 2018 00:37:03 -0700 Subject: [PATCH 372/387] Update logo for all README --- README_CN.md | 4 ++-- README_GE.md | 2 +- README_JP.md | 4 ++-- README_KR.md | 4 ++-- README_PTBR.md | 2 +- 5 files changed, 8 insertions(+), 8 deletions(-) diff --git a/README_CN.md b/README_CN.md index f3dc87fe9..c3a97c1ac 100644 --- a/README_CN.md +++ b/README_CN.md @@ -1,4 +1,4 @@ -

+

[English](README.md) | 简体中文 | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) | [Português](README_PTBR.md) @@ -79,7 +79,7 @@ pip3 uninstall -y algorithms - [josephus_problem: 约瑟夫问题](algorithms/arrays/josephus.py) - [max_ones_index](algorithms/arrays/max_ones_index.py) - [limit](algorithms/arrays/limit.py) - - [longest_non_repeat：最长不重复子串](algorithms/arrays/longest_non_repeat.py/) + - [longest_non_repeat：最长不重复子串](algorithms/arrays/longest_non_repeat.py/) - [merge_intervals：合并重叠间隔](algorithms/arrays/merge_intervals.py) - [missing_ranges：遗失的范围](algorithms/arrays/missing_ranges.py) - [plus_one：加一运算](algorithms/arrays/plus_one.py) diff --git a/README_GE.md b/README_GE.md index 226deee2c..4f88a821b 100644 --- a/README_GE.md +++ b/README_GE.md @@ -1,4 +1,4 @@ -

+

[English](README.md) | [简体中文](README_CN.md) | Deutsch | [日本語](README_JP.md) | [한국어](README_KR.md) | [Português](README_PTBR.md) diff --git a/README_JP.md b/README_JP.md index 7e3062e1d..8a89bbfdc 100644 --- a/README_JP.md +++ b/README_JP.md @@ -1,4 +1,4 @@ -

+

[English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | 日本語 | [한국어](README_KR.md) | [Português](README_PTBR.md) @@ -13,7 +13,7 @@ Pythonのデータ構造とアルゴリズム Python 3で開発された簡単で明確なデータ構造とアルゴリズムの例を紹介します。 ## 貢献 -貢献に興味を持っていただきありがとうございます。 このプロジェクトに貢献する方法はたくさんあります。 +貢献に興味を持っていただきありがとうございます。 このプロジェクトに貢献する方法はたくさんあります。 [簡単にコミュニティへ貢献するには](CONTRIBUTING_JP.md) diff --git a/README_KR.md b/README_KR.md index 91bfc0a38..c2f365e13 100644 --- a/README_KR.md +++ b/README_KR.md @@ -1,4 +1,4 @@ -

+

[English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | 한국어 | [Português](README_PTBR.md) @@ -328,7 +328,7 @@ if __name__ == "__main__": - [tree](algorithms/tree/tree.py) - [union-find : 합집합 찾기](algorithms/union-find) - [count_islands](algorithms/union-find/count_islands.py) - + ## 기여자들 이 저장소는 아래 사람들에 의해 유지되고 있습니다. diff --git a/README_PTBR.md b/README_PTBR.md index 2a9e05fba..6f6b93a92 100644 --- a/README_PTBR.md +++ b/README_PTBR.md @@ -1,4 +1,4 @@ -

+

[English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) | Português From dd52a82e733fe209758c0b44a077ba421c77da91 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Tue, 24 Jul 2018 16:22:51 +0200 Subject: [PATCH 373/387] added nearest neighbor algorithm --- .../machine-learning/nearest_neighbor.py | 57 +++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 algorithms/machine-learning/nearest_neighbor.py diff --git a/algorithms/machine-learning/nearest_neighbor.py b/algorithms/machine-learning/nearest_neighbor.py new file mode 100644 index 000000000..64d102fdd --- /dev/null +++ b/algorithms/machine-learning/nearest_neighbor.py @@ -0,0 +1,57 @@ +import numpy + +# train set for the AND-function +trainSetAND = {(0,0) : 0, (0,1) :0, (1,0) : 0, (1,1) : 1} + +# train set for light or dark colors +trainSetLight = {(11, 98, 237) : 'L', (3, 39, 96) : 'D', (242, 226, 12) : 'L', (99, 93, 4) : 'D', +(232, 62, 32) : 'L', (119, 28, 11) : 'D', (25, 214, 47) : 'L', (89, 136, 247) : 'L', +(21, 34, 63) : 'D', (237, 99, 120) : 'L', (73, 33, 39) : 'D'} + +def distance(x,y): + """[summary] + HELPER-FUNCTION + calculates the (eulidean) distance between vector x and y. + + We use the numpy libriary + + Arguments: + x {[tuple]} -- [vector] + y {[tuple]} -- [vector] + """ + assert len(x) == len(y), "The vector must have same length" + import math + result = () + for i in range(len(x)): + result += (x[i] -y[i],) + return numpy.linalg.norm(result) + +def nearest_neighbor(x, tSet): + """[summary] + Implements the nearest neighbor algorithm + + Arguments: + x {[tupel]} -- [vector] + tSet {[dict]} -- [training set] + + Returns: + [type] -- [result of the AND-function] + """ + assert isinstance(x, tuple) and isinstance(tSet, dict) + currentKey = () + MAX = 32768 # max value + minD = MAX + for key in tSet: + d = distance(x, key) + if d < minD: + minD = d + currentKey = key + return tSet[currentKey] + +# Some test cases + +# print(nearest_neighbor((1,1), trainSetAND)) # => 1 +# print(nearest_neighbor((0,1), trainSetAND)) # => 0 +# print(nearest_neighbor((31, 242, 164), trainSetLight)) # => L +# print(nearest_neighbor((13, 94, 64), trainSetLight)) # => D +# print(nearest_neighbor((230, 52, 239), trainSetLight)) # => L \ No newline at end of file From 343600f4114e848d588d5d9859bdf3fd443435b5 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Tue, 24 Jul 2018 16:27:25 +0200 Subject: [PATCH 374/387] changed the readme --- README.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/README.md b/README.md index 4cf79cb1d..7ef7f522d 100644 --- a/README.md +++ b/README.md @@ -350,6 +350,8 @@ If you want to uninstall algorithms, it is as simple as: - [simplify_path](algorithms/unix/path/simplify_path.py) - [union-find](algorithms/union-find) - [count_islands](algorithms/union-find/count_islands.py) +- [machine-learning](algorithms/machine-learning) + - [nearest neighbor classification](algorithms/machine-learning/nearest_neighbor.py) ## Contributors The repo is maintained by From d38649eaa006b30fa4faee6a7571068fded559e7 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Tue, 24 Jul 2018 16:37:28 +0200 Subject: [PATCH 375/387] changed variable names --- algorithms/machine-learning/nearest_neighbor.py | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/algorithms/machine-learning/nearest_neighbor.py b/algorithms/machine-learning/nearest_neighbor.py index 64d102fdd..acd2f1c6e 100644 --- a/algorithms/machine-learning/nearest_neighbor.py +++ b/algorithms/machine-learning/nearest_neighbor.py @@ -38,15 +38,15 @@ def nearest_neighbor(x, tSet): [type] -- [result of the AND-function] """ assert isinstance(x, tuple) and isinstance(tSet, dict) - currentKey = () + current_key = () MAX = 32768 # max value - minD = MAX + min_d = MAX for key in tSet: d = distance(x, key) - if d < minD: - minD = d - currentKey = key - return tSet[currentKey] + if d < min_d: + min_d = d + current_key = key + return tSet[current_key] # Some test cases From b9bf25f5b6675b1fff04e7131b5b4e5c58e6ef90 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Tue, 24 Jul 2018 23:06:36 +0200 Subject: [PATCH 376/387] renamed the directory --- algorithms/{machine-learning => ml}/nearest_neighbor.py | 0 1 file changed, 0 insertions(+), 0 deletions(-) rename algorithms/{machine-learning => ml}/nearest_neighbor.py (100%) diff --git a/algorithms/machine-learning/nearest_neighbor.py b/algorithms/ml/nearest_neighbor.py similarity index 100% rename from algorithms/machine-learning/nearest_neighbor.py rename to algorithms/ml/nearest_neighbor.py From 19c2596e1bf4a0be46256fefa653452235529d92 Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Tue, 24 Jul 2018 23:17:33 +0200 Subject: [PATCH 377/387] added a test. removed test cases. renamed directory --- algorithms/ml/nearest_neighbor.py | 18 +----------------- tests/test_ml.py | 28 ++++++++++++++++++++++++++++ 2 files changed, 29 insertions(+), 17 deletions(-) create mode 100644 tests/test_ml.py diff --git a/algorithms/ml/nearest_neighbor.py b/algorithms/ml/nearest_neighbor.py index acd2f1c6e..4dfc2718b 100644 --- a/algorithms/ml/nearest_neighbor.py +++ b/algorithms/ml/nearest_neighbor.py @@ -1,13 +1,5 @@ import numpy -# train set for the AND-function -trainSetAND = {(0,0) : 0, (0,1) :0, (1,0) : 0, (1,1) : 1} - -# train set for light or dark colors -trainSetLight = {(11, 98, 237) : 'L', (3, 39, 96) : 'D', (242, 226, 12) : 'L', (99, 93, 4) : 'D', -(232, 62, 32) : 'L', (119, 28, 11) : 'D', (25, 214, 47) : 'L', (89, 136, 247) : 'L', -(21, 34, 63) : 'D', (237, 99, 120) : 'L', (73, 33, 39) : 'D'} - def distance(x,y): """[summary] HELPER-FUNCTION @@ -46,12 +38,4 @@ def nearest_neighbor(x, tSet): if d < min_d: min_d = d current_key = key - return tSet[current_key] - -# Some test cases - -# print(nearest_neighbor((1,1), trainSetAND)) # => 1 -# print(nearest_neighbor((0,1), trainSetAND)) # => 0 -# print(nearest_neighbor((31, 242, 164), trainSetLight)) # => L -# print(nearest_neighbor((13, 94, 64), trainSetLight)) # => D -# print(nearest_neighbor((230, 52, 239), trainSetLight)) # => L \ No newline at end of file + return tSet[current_key] \ No newline at end of file diff --git a/tests/test_ml.py b/tests/test_ml.py new file mode 100644 index 000000000..495829ac6 --- /dev/null +++ b/tests/test_ml.py @@ -0,0 +1,28 @@ +from algorithms.ml.nearest_neighbor import ( + distance, + nearest_neighbor +) + +import unittest + +class TestML(unittest.TestCase): + def setUp(self): + # train set for the AND-function + self.trainSetAND = {(0,0) : 0, (0,1) :0, (1,0) : 0, (1,1) : 1} + + # train set for light or dark colors + self.trainSetLight = {(11, 98, 237) : 'L', (3, 39, 96) : 'D', (242, 226, 12) : 'L', (99, 93, 4) : 'D', + (232, 62, 32) : 'L', (119, 28, 11) : 'D', (25, 214, 47) : 'L', (89, 136, 247) : 'L', + (21, 34, 63) : 'D', (237, 99, 120) : 'L', (73, 33, 39) : 'D'} + def test_nearest_neighbor(self): + # AND-function + self.assertEqual(nearest_neighbor((1,1), self.trainSetAND), 1) + self.assertEqual(nearest_neighbor((0,1), self.trainSetAND), 0) + + # dark/light color test + self.assertEqual(nearest_neighbor((31, 242, 164), self.trainSetLight), 'L') + self.assertEqual(nearest_neighbor((13, 94, 64), self.trainSetLight), 'D') + self.assertEqual(nearest_neighbor((230, 52, 239), self.trainSetLight), 'L') + +if __name__ == "__main__": + unittest.main() \ No newline at end of file From 4abf64c592f00ce2c13bd11ecad1696dc9ea8e6c Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Tue, 24 Jul 2018 23:25:23 +0200 Subject: [PATCH 378/387] added test for distance(...) --- tests/test_ml.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tests/test_ml.py b/tests/test_ml.py index 495829ac6..1d24cce7c 100644 --- a/tests/test_ml.py +++ b/tests/test_ml.py @@ -23,6 +23,7 @@ def test_nearest_neighbor(self): self.assertEqual(nearest_neighbor((31, 242, 164), self.trainSetLight), 'L') self.assertEqual(nearest_neighbor((13, 94, 64), self.trainSetLight), 'D') self.assertEqual(nearest_neighbor((230, 52, 239), self.trainSetLight), 'L') - + def test_distance(self): + self.assertAlmostEqual(distance((1,2,3), (1,0,-1)), 4.47, 2) if __name__ == "__main__": unittest.main() \ No newline at end of file From a9787738f1b6808d7eb979a9f42d24d0e540802b Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Tue, 24 Jul 2018 23:26:42 +0200 Subject: [PATCH 379/387] added empty lines --- tests/test_ml.py | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tests/test_ml.py b/tests/test_ml.py index 1d24cce7c..61852ec31 100644 --- a/tests/test_ml.py +++ b/tests/test_ml.py @@ -25,5 +25,7 @@ def test_nearest_neighbor(self): self.assertEqual(nearest_neighbor((230, 52, 239), self.trainSetLight), 'L') def test_distance(self): self.assertAlmostEqual(distance((1,2,3), (1,0,-1)), 4.47, 2) + + if __name__ == "__main__": unittest.main() \ No newline at end of file From 065898e79cce23ec4b0bf2587428d68c69ac92da Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Wed, 25 Jul 2018 16:16:58 +0200 Subject: [PATCH 380/387] removed math. added numpy.inf --- algorithms/ml/nearest_neighbor.py | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/algorithms/ml/nearest_neighbor.py b/algorithms/ml/nearest_neighbor.py index 4dfc2718b..2ee801ded 100644 --- a/algorithms/ml/nearest_neighbor.py +++ b/algorithms/ml/nearest_neighbor.py @@ -12,7 +12,6 @@ def distance(x,y): y {[tuple]} -- [vector] """ assert len(x) == len(y), "The vector must have same length" - import math result = () for i in range(len(x)): result += (x[i] -y[i],) @@ -31,8 +30,7 @@ def nearest_neighbor(x, tSet): """ assert isinstance(x, tuple) and isinstance(tSet, dict) current_key = () - MAX = 32768 # max value - min_d = MAX + min_d = numpy.inf for key in tSet: d = distance(x, key) if d < min_d: From 913329fb1512de3b140620449d0580592c9f0482 Mon Sep 17 00:00:00 2001 From: Keon Date: Thu, 26 Jul 2018 22:09:51 -0700 Subject: [PATCH 381/387] update logo path (#382) --- README.md | 2 +- README_CN.md | 2 +- README_GE.md | 2 +- README_JP.md | 2 +- README_KR.md | 2 +- README_PTBR.md | 2 +- .../source/_static/logo}/128pxblack.png | Bin .../source/_static/logo}/128pxblack.svg | 0 .../source/_static/logo}/128pxblue.png | Bin .../source/_static/logo}/128pxblue.svg | 0 .../source/_static/logo}/128pxorange.png | Bin .../source/_static/logo}/128pxorange.svg | 0 .../source/_static/logo}/256pxblack.png | Bin .../source/_static/logo}/256pxblack.svg | 0 .../source/_static/logo}/256pxblue.png | Bin .../source/_static/logo}/256pxblue.svg | 0 .../source/_static/logo}/256pxorange.png | Bin .../source/_static/logo}/256pxorange.svg | 0 .../source/_static/logo}/512pxblack.png | Bin .../source/_static/logo}/512pxblack.svg | 0 .../source/_static/logo}/512pxblue.png | Bin .../source/_static/logo}/512pxblue.svg | 0 .../source/_static/logo}/512pxorange.png | Bin .../source/_static/logo}/512pxorange.svg | 0 {LogoDesins => docs/source/_static/logo}/add | 0 .../source/_static/logo}/logotype1black.png | Bin .../source/_static/logo}/logotype1black.svg | 0 .../source/_static/logo}/logotype1blue.png | Bin .../source/_static/logo}/logotype1blue.svg | 0 .../source/_static/logo}/logotype1orange.png | Bin .../source/_static/logo}/logotype1orange.svg | 0 .../source/_static/logo}/logotype2black.png | Bin .../source/_static/logo}/logotype2black.svg | 0 .../source/_static/logo}/logotype2blue.png | Bin .../source/_static/logo}/logotype2blue.svg | 0 .../source/_static/logo}/logotype2orange.png | Bin .../source/_static/logo}/logotype2orange.svg | 0 37 files changed, 6 insertions(+), 6 deletions(-) rename {LogoDesins => docs/source/_static/logo}/128pxblack.png (100%) rename {LogoDesins => docs/source/_static/logo}/128pxblack.svg (100%) rename {LogoDesins => docs/source/_static/logo}/128pxblue.png (100%) rename {LogoDesins => docs/source/_static/logo}/128pxblue.svg (100%) rename {LogoDesins => docs/source/_static/logo}/128pxorange.png (100%) rename {LogoDesins => docs/source/_static/logo}/128pxorange.svg (100%) rename {LogoDesins => docs/source/_static/logo}/256pxblack.png (100%) rename {LogoDesins => docs/source/_static/logo}/256pxblack.svg (100%) rename {LogoDesins => docs/source/_static/logo}/256pxblue.png (100%) rename {LogoDesins => docs/source/_static/logo}/256pxblue.svg (100%) rename {LogoDesins => docs/source/_static/logo}/256pxorange.png (100%) rename {LogoDesins => docs/source/_static/logo}/256pxorange.svg (100%) rename {LogoDesins => docs/source/_static/logo}/512pxblack.png (100%) rename {LogoDesins => docs/source/_static/logo}/512pxblack.svg (100%) rename {LogoDesins => docs/source/_static/logo}/512pxblue.png (100%) rename {LogoDesins => docs/source/_static/logo}/512pxblue.svg (100%) rename {LogoDesins => docs/source/_static/logo}/512pxorange.png (100%) rename {LogoDesins => docs/source/_static/logo}/512pxorange.svg (100%) rename {LogoDesins => docs/source/_static/logo}/add (100%) rename {LogoDesins => docs/source/_static/logo}/logotype1black.png (100%) rename {LogoDesins => docs/source/_static/logo}/logotype1black.svg (100%) rename {LogoDesins => docs/source/_static/logo}/logotype1blue.png (100%) rename {LogoDesins => docs/source/_static/logo}/logotype1blue.svg (100%) rename {LogoDesins => docs/source/_static/logo}/logotype1orange.png (100%) rename {LogoDesins => docs/source/_static/logo}/logotype1orange.svg (100%) rename {LogoDesins => docs/source/_static/logo}/logotype2black.png (100%) rename {LogoDesins => docs/source/_static/logo}/logotype2black.svg (100%) rename {LogoDesins => docs/source/_static/logo}/logotype2blue.png (100%) rename {LogoDesins => docs/source/_static/logo}/logotype2blue.svg (100%) rename {LogoDesins => docs/source/_static/logo}/logotype2orange.png (100%) rename {LogoDesins => docs/source/_static/logo}/logotype2orange.svg (100%) diff --git a/README.md b/README.md index 4cf79cb1d..c736a423f 100644 --- a/README.md +++ b/README.md @@ -1,4 +1,4 @@ -

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[English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | 한국어 | [Português](README_PTBR.md) diff --git a/README_PTBR.md b/README_PTBR.md index 6f6b93a92..2870a1546 100644 --- a/README_PTBR.md +++ b/README_PTBR.md @@ -1,4 +1,4 @@ -

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[English](README.md) | [简体中文](README_CN.md) | [Deutsch](README_GE.md) | [日本語](README_JP.md) | [한국어](README_KR.md) | Português diff --git a/LogoDesins/128pxblack.png b/docs/source/_static/logo/128pxblack.png similarity index 100% rename from LogoDesins/128pxblack.png rename to docs/source/_static/logo/128pxblack.png diff --git a/LogoDesins/128pxblack.svg b/docs/source/_static/logo/128pxblack.svg similarity index 100% rename from LogoDesins/128pxblack.svg rename to docs/source/_static/logo/128pxblack.svg diff --git a/LogoDesins/128pxblue.png b/docs/source/_static/logo/128pxblue.png similarity index 100% rename from LogoDesins/128pxblue.png rename to docs/source/_static/logo/128pxblue.png diff --git a/LogoDesins/128pxblue.svg b/docs/source/_static/logo/128pxblue.svg similarity index 100% rename from LogoDesins/128pxblue.svg rename to docs/source/_static/logo/128pxblue.svg diff --git a/LogoDesins/128pxorange.png b/docs/source/_static/logo/128pxorange.png similarity index 100% rename from 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--git a/LogoDesins/logotype2black.png b/docs/source/_static/logo/logotype2black.png similarity index 100% rename from LogoDesins/logotype2black.png rename to docs/source/_static/logo/logotype2black.png diff --git a/LogoDesins/logotype2black.svg b/docs/source/_static/logo/logotype2black.svg similarity index 100% rename from LogoDesins/logotype2black.svg rename to docs/source/_static/logo/logotype2black.svg diff --git a/LogoDesins/logotype2blue.png b/docs/source/_static/logo/logotype2blue.png similarity index 100% rename from LogoDesins/logotype2blue.png rename to docs/source/_static/logo/logotype2blue.png diff --git a/LogoDesins/logotype2blue.svg b/docs/source/_static/logo/logotype2blue.svg similarity index 100% rename from LogoDesins/logotype2blue.svg rename to docs/source/_static/logo/logotype2blue.svg diff --git a/LogoDesins/logotype2orange.png b/docs/source/_static/logo/logotype2orange.png similarity index 100% rename from LogoDesins/logotype2orange.png rename to docs/source/_static/logo/logotype2orange.png diff --git a/LogoDesins/logotype2orange.svg b/docs/source/_static/logo/logotype2orange.svg similarity index 100% rename from LogoDesins/logotype2orange.svg rename to docs/source/_static/logo/logotype2orange.svg From 5fd9d6dad35cf00c6c1a2191bc5977a9e5a761c6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E9=9D=B3=E9=98=B3?= <260893248@qq.com> Date: Sun, 29 Jul 2018 01:04:30 +0800 Subject: [PATCH 382/387] fix typo (#385) fix typo --- README_CN.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README_CN.md b/README_CN.md index bd45839e0..4dc5cfcc7 100644 --- a/README_CN.md +++ b/README_CN.md @@ -37,7 +37,7 @@ python3 -m unittest tests.test_sort 如下代码运行所有测试代码： ``` -pyhton3 -m pytest tests +python3 -m pytest tests ``` From b7d5db16a1534fe116e85dcc8451ee669158539a Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Sun, 29 Jul 2018 06:51:52 -0700 Subject: [PATCH 383/387] Add test for map (#386) --- algorithms/map/__init__.py | 2 + algorithms/map/hashtable.py | 93 ----------- algorithms/map/separate_chaining_hashtable.py | 59 ------- tests/test_map.py | 152 ++++++++++++++++++ 4 files changed, 154 insertions(+), 152 deletions(-) create mode 100644 algorithms/map/__init__.py create mode 100644 tests/test_map.py diff --git a/algorithms/map/__init__.py b/algorithms/map/__init__.py new file mode 100644 index 000000000..a663c8a30 --- /dev/null +++ b/algorithms/map/__init__.py @@ -0,0 +1,2 @@ +from .hashtable import * +from .separate_chaining_hashtable import * diff --git a/algorithms/map/hashtable.py b/algorithms/map/hashtable.py index 1c98ee22c..f579c0b0d 100644 --- a/algorithms/map/hashtable.py +++ b/algorithms/map/hashtable.py @@ -1,6 +1,3 @@ -from unittest import TestCase -import unittest - class HashTable(object): """ HashMap Data Type @@ -120,93 +117,3 @@ def __resize(self): for key, value in zip(keys, values): if key is not self._empty and key is not self._deleted: self.put(key, value) - - -class TestHashTable(TestCase): - def test_one_entry(self): - m = HashTable(10) - m.put(1, '1') - self.assertEqual('1', m.get(1)) - - def test_add_entry_bigger_than_table_size(self): - m = HashTable(10) - m.put(11, '1') - self.assertEqual('1', m.get(11)) - - def test_get_none_if_key_missing_and_hash_collision(self): - m = HashTable(10) - m.put(1, '1') - self.assertEqual(None, m.get(11)) - - def test_two_entries_with_same_hash(self): - m = HashTable(10) - m.put(1, '1') - m.put(11, '11') - self.assertEqual('1', m.get(1)) - self.assertEqual('11', m.get(11)) - - def test_get_on_full_table_does_halts(self): - # and does not search forever - m = HashTable(10) - for i in range(10, 20): - m.put(i, i) - self.assertEqual(None, m.get(1)) - - def test_delete_key(self): - m = HashTable(10) - for i in range(5): - m.put(i, i**2) - m.del_(1) - self.assertEqual(None, m.get(1)) - self.assertEqual(4,m.get(2)) - - def test_delete_key_and_reassign(self): - m = HashTable(10) - m.put(1, 1) - del m[1] - m.put(1, 2) - self.assertEqual(2, m.get(1)) - - def test_assigning_to_full_table_throws_error(self): - m = HashTable(3) - m.put(1, 1) - m.put(2, 2) - m.put(3, 3) - with self.assertRaises(ValueError): - m.put(4, 4) - - def test_len_trivial(self): - m = HashTable(10) - self.assertEqual(0, len(m)) - for i in range(10): - m.put(i, i) - self.assertEqual(i + 1, len(m)) - - def test_len_after_deletions(self): - m = HashTable(10) - m.put(1, 1) - self.assertEqual(1, len(m)) - m.del_(1) - self.assertEqual(0, len(m)) - m.put(11, 42) - self.assertEqual(1, len(m)) - - def test_resizable_hash_table(self): - m = ResizableHashTable() - self.assertEqual(ResizableHashTable.MIN_SIZE, m.size) - for i in range(ResizableHashTable.MIN_SIZE): - m.put(i, 'foo') - self.assertEqual(ResizableHashTable.MIN_SIZE * 2, m.size) - self.assertEqual('foo', m.get(1)) - self.assertEqual('foo', m.get(3)) - self.assertEqual('foo', m.get(ResizableHashTable.MIN_SIZE - 1)) - - def test_fill_up_the_limit(self): - m = HashTable(10) - for i in range(10): - m.put(i,i**2) - for i in range(10): - self.assertEqual(i**2,m.get(i)) - -if __name__ == "__main__": - unittest.main() \ No newline at end of file diff --git a/algorithms/map/separate_chaining_hashtable.py b/algorithms/map/separate_chaining_hashtable.py index 5feb50af8..fecb251fa 100644 --- a/algorithms/map/separate_chaining_hashtable.py +++ b/algorithms/map/separate_chaining_hashtable.py @@ -82,62 +82,3 @@ def __delitem__(self, key): def __setitem__(self, key, value): self.put(key, value) - - -class TestSeparateChainingHashTable(unittest.TestCase): - def test_one_entry(self): - m = SeparateChainingHashTable(10) - m.put(1, '1') - self.assertEqual('1', m.get(1)) - - def test_two_entries_with_same_hash(self): - m = SeparateChainingHashTable(10) - m.put(1, '1') - m.put(11, '11') - self.assertEqual('1', m.get(1)) - self.assertEqual('11', m.get(11)) - - def test_len_trivial(self): - m = SeparateChainingHashTable(10) - self.assertEqual(0, len(m)) - for i in range(10): - m.put(i, i) - self.assertEqual(i + 1, len(m)) - - def test_len_after_deletions(self): - m = SeparateChainingHashTable(10) - m.put(1, 1) - self.assertEqual(1, len(m)) - m.del_(1) - self.assertEqual(0, len(m)) - m.put(11, 42) - self.assertEqual(1, len(m)) - - def test_delete_key(self): - m = SeparateChainingHashTable(10) - for i in range(5): - m.put(i, i**2) - m.del_(1) - self.assertEqual(None, m.get(1)) - self.assertEqual(4, m.get(2)) - - def test_delete_key_and_reassign(self): - m = SeparateChainingHashTable(10) - m.put(1, 1) - del m[1] - m.put(1, 2) - self.assertEqual(2, m.get(1)) - - def test_add_entry_bigger_than_table_size(self): - m = SeparateChainingHashTable(10) - m.put(11, '1') - self.assertEqual('1', m.get(11)) - - def test_get_none_if_key_missing_and_hash_collision(self): - m = SeparateChainingHashTable(10) - m.put(1, '1') - self.assertEqual(None, m.get(11)) - - -if __name__ == '__main__': - unittest.main() diff --git a/tests/test_map.py b/tests/test_map.py new file mode 100644 index 000000000..5786803e9 --- /dev/null +++ b/tests/test_map.py @@ -0,0 +1,152 @@ +from algorithms.map import ( + HashTable, ResizableHashTable, + Node, SeparateChainingHashTable +) + +import unittest + +class TestHashTable(unittest.TestCase): + def test_one_entry(self): + m = HashTable(10) + m.put(1, '1') + self.assertEqual('1', m.get(1)) + + def test_add_entry_bigger_than_table_size(self): + m = HashTable(10) + m.put(11, '1') + self.assertEqual('1', m.get(11)) + + def test_get_none_if_key_missing_and_hash_collision(self): + m = HashTable(10) + m.put(1, '1') + self.assertEqual(None, m.get(11)) + + def test_two_entries_with_same_hash(self): + m = HashTable(10) + m.put(1, '1') + m.put(11, '11') + self.assertEqual('1', m.get(1)) + self.assertEqual('11', m.get(11)) + + def test_get_on_full_table_does_halts(self): + # and does not search forever + m = HashTable(10) + for i in range(10, 20): + m.put(i, i) + self.assertEqual(None, m.get(1)) + + def test_delete_key(self): + m = HashTable(10) + for i in range(5): + m.put(i, i**2) + m.del_(1) + self.assertEqual(None, m.get(1)) + self.assertEqual(4,m.get(2)) + + def test_delete_key_and_reassign(self): + m = HashTable(10) + m.put(1, 1) + del m[1] + m.put(1, 2) + self.assertEqual(2, m.get(1)) + + def test_assigning_to_full_table_throws_error(self): + m = HashTable(3) + m.put(1, 1) + m.put(2, 2) + m.put(3, 3) + with self.assertRaises(ValueError): + m.put(4, 4) + + def test_len_trivial(self): + m = HashTable(10) + self.assertEqual(0, len(m)) + for i in range(10): + m.put(i, i) + self.assertEqual(i + 1, len(m)) + + def test_len_after_deletions(self): + m = HashTable(10) + m.put(1, 1) + self.assertEqual(1, len(m)) + m.del_(1) + self.assertEqual(0, len(m)) + m.put(11, 42) + self.assertEqual(1, len(m)) + + def test_resizable_hash_table(self): + m = ResizableHashTable() + self.assertEqual(ResizableHashTable.MIN_SIZE, m.size) + for i in range(ResizableHashTable.MIN_SIZE): + m.put(i, 'foo') + self.assertEqual(ResizableHashTable.MIN_SIZE * 2, m.size) + self.assertEqual('foo', m.get(1)) + self.assertEqual('foo', m.get(3)) + self.assertEqual('foo', m.get(ResizableHashTable.MIN_SIZE - 1)) + + def test_fill_up_the_limit(self): + m = HashTable(10) + for i in range(10): + m.put(i,i**2) + for i in range(10): + self.assertEqual(i**2,m.get(i)) + + +class TestSeparateChainingHashTable(unittest.TestCase): + def test_one_entry(self): + m = SeparateChainingHashTable(10) + m.put(1, '1') + self.assertEqual('1', m.get(1)) + + def test_two_entries_with_same_hash(self): + m = SeparateChainingHashTable(10) + m.put(1, '1') + m.put(11, '11') + self.assertEqual('1', m.get(1)) + self.assertEqual('11', m.get(11)) + + def test_len_trivial(self): + m = SeparateChainingHashTable(10) + self.assertEqual(0, len(m)) + for i in range(10): + m.put(i, i) + self.assertEqual(i + 1, len(m)) + + def test_len_after_deletions(self): + m = SeparateChainingHashTable(10) + m.put(1, 1) + self.assertEqual(1, len(m)) + m.del_(1) + self.assertEqual(0, len(m)) + m.put(11, 42) + self.assertEqual(1, len(m)) + + def test_delete_key(self): + m = SeparateChainingHashTable(10) + for i in range(5): + m.put(i, i**2) + m.del_(1) + self.assertEqual(None, m.get(1)) + self.assertEqual(4, m.get(2)) + + def test_delete_key_and_reassign(self): + m = SeparateChainingHashTable(10) + m.put(1, 1) + del m[1] + m.put(1, 2) + self.assertEqual(2, m.get(1)) + + def test_add_entry_bigger_than_table_size(self): + m = SeparateChainingHashTable(10) + m.put(11, '1') + self.assertEqual('1', m.get(11)) + + def test_get_none_if_key_missing_and_hash_collision(self): + m = SeparateChainingHashTable(10) + m.put(1, '1') + self.assertEqual(None, m.get(11)) + + + +if __name__ == "__main__": + unittest.main() From d5ded338b148de000341ae9acb946138ba84190d Mon Sep 17 00:00:00 2001 From: Christian Bender Date: Sun, 29 Jul 2018 16:54:09 +0200 Subject: [PATCH 384/387] removed numpy --- algorithms/ml/nearest_neighbor.py | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/algorithms/ml/nearest_neighbor.py b/algorithms/ml/nearest_neighbor.py index 2ee801ded..0029c129d 100644 --- a/algorithms/ml/nearest_neighbor.py +++ b/algorithms/ml/nearest_neighbor.py @@ -1,11 +1,9 @@ -import numpy +import math def distance(x,y): """[summary] HELPER-FUNCTION calculates the (eulidean) distance between vector x and y. - - We use the numpy libriary Arguments: x {[tuple]} -- [vector] @@ -13,9 +11,13 @@ def distance(x,y): """ assert len(x) == len(y), "The vector must have same length" result = () + sum = 0 for i in range(len(x)): result += (x[i] -y[i],) - return numpy.linalg.norm(result) + for component in result: + sum += component**2 + return math.sqrt(sum) + def nearest_neighbor(x, tSet): """[summary] @@ -30,7 +32,7 @@ def nearest_neighbor(x, tSet): """ assert isinstance(x, tuple) and isinstance(tSet, dict) current_key = () - min_d = numpy.inf + min_d = math.inf for key in tSet: d = distance(x, key) if d < min_d: From 08404189801ac2e7c14c6ba2cc2a6454f03445cc Mon Sep 17 00:00:00 2001 From: danghai Date: Wed, 1 Aug 2018 20:51:19 -0700 Subject: [PATCH 385/387] Replace min.inf by float(inf) --- algorithms/ml/nearest_neighbor.py | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/algorithms/ml/nearest_neighbor.py b/algorithms/ml/nearest_neighbor.py index 0029c129d..d0fabab15 100644 --- a/algorithms/ml/nearest_neighbor.py +++ b/algorithms/ml/nearest_neighbor.py @@ -17,25 +17,25 @@ def distance(x,y): for component in result: sum += component**2 return math.sqrt(sum) - + def nearest_neighbor(x, tSet): """[summary] - Implements the nearest neighbor algorithm + Implements the nearest neighbor algorithm Arguments: x {[tupel]} -- [vector] tSet {[dict]} -- [training set] - + Returns: [type] -- [result of the AND-function] """ assert isinstance(x, tuple) and isinstance(tSet, dict) current_key = () - min_d = math.inf + min_d = float('inf') for key in tSet: d = distance(x, key) if d < min_d: min_d = d current_key = key - return tSet[current_key] \ No newline at end of file + return tSet[current_key] From 48072b41ace2c18636f965dc3ec40c8f79cbba02 Mon Sep 17 00:00:00 2001 From: Hai Hoang Dang Date: Thu, 2 Aug 2018 07:27:07 -0700 Subject: [PATCH 386/387] PR to add some problem (#378) * Add longest_common_prefix to string * Add brute force way for is_rotated, add rotate to string * Add first_unique_char to string * Add repeat_substring to string --- README.md | 4 ++ algorithms/strings/__init__.py | 4 ++ algorithms/strings/first_unique_char.py | 27 +++++++++ algorithms/strings/is_rotated.py | 18 +++++- algorithms/strings/longest_common_prefix.py | 66 +++++++++++++++++++++ algorithms/strings/repeat_substring.py | 25 ++++++++ algorithms/strings/rotate.py | 18 ++++++ tests/test_strings.py | 46 +++++++++++++- 8 files changed, 205 insertions(+), 3 deletions(-) create mode 100644 algorithms/strings/first_unique_char.py create mode 100644 algorithms/strings/longest_common_prefix.py create mode 100644 algorithms/strings/repeat_substring.py create mode 100644 algorithms/strings/rotate.py diff --git a/README.md b/README.md index ea8a841f7..7bb26892d 100644 --- a/README.md +++ b/README.md @@ -295,6 +295,10 @@ If you want to uninstall algorithms, it is as simple as: - [count_binary_substring](algorithms/strings/count_binary_substring.py) - [repeat_string](algorithms/strings/repeat_string.py) - [min_distance](algorithms/strings/min_distance.py) + - [longest_common_prefix](algorithms/strings/longest_common_prefix.py) + - [rotate](algorithms/strings/rotate.py) + - [first_unique_char](algorithms/strings/first_unique_char.py) + - [repeat_substring](algorithms/strings/repeat_substring.py) - [tree](algorithms/tree) - [bst](algorithms/tree/tree/bst) - [array2bst](algorithms/tree/bst/array2bst.py) diff --git a/algorithms/strings/__init__.py b/algorithms/strings/__init__.py index d7ae4b673..98306f61d 100644 --- a/algorithms/strings/__init__.py +++ b/algorithms/strings/__init__.py @@ -30,3 +30,7 @@ from .repeat_string import * from .text_justification import * from .min_distance import * +from .longest_common_prefix import * +from .rotate import * +from .first_unique_char import * +from .repeat_substring import * diff --git a/algorithms/strings/first_unique_char.py b/algorithms/strings/first_unique_char.py new file mode 100644 index 000000000..44ba05e49 --- /dev/null +++ b/algorithms/strings/first_unique_char.py @@ -0,0 +1,27 @@ +""" +Given a string, find the first non-repeating character in it and return it's +index. If it doesn't exist, return -1. + +For example: +s = "leetcode" +return 0. + +s = "loveleetcode", +return 2. + +Reference: https://leetcode.com/problems/first-unique-character-in-a-string/description/ +""" +def first_unique_char(s): + """ + :type s: str + :rtype: int + """ + if (len(s) == 1): + return 0 + ban = [] + for i in range(len(s)): + if all(s[i] != s[k] for k in range(i + 1, len(s))) == True and s[i] not in ban: + return i + else: + ban.append(s[i]) + return -1 diff --git a/algorithms/strings/is_rotated.py b/algorithms/strings/is_rotated.py index a68d62d04..a827fb497 100644 --- a/algorithms/strings/is_rotated.py +++ b/algorithms/strings/is_rotated.py @@ -6,10 +6,26 @@ accepts two strings returns bool +Reference: https://leetcode.com/problems/rotate-string/description/ """ def is_rotated(s1, s2): if len(s1) == len(s2): return s2 in s1 + s1 else: - return False \ No newline at end of file + return False + +""" +Another solution: brutal force +Complexity: O(N^2) +""" +def is_rotated_v1(s1, s2): + if len(s1) != len(s2): + return False + if len(s1) == 0: + return True + + for c in range(len(s1)): + if all(s1[(c + i) % len(s1)] == s2[i] for i in range(len(s1))): + return True + return False diff --git a/algorithms/strings/longest_common_prefix.py b/algorithms/strings/longest_common_prefix.py new file mode 100644 index 000000000..80facc934 --- /dev/null +++ b/algorithms/strings/longest_common_prefix.py @@ -0,0 +1,66 @@ +""" +Write a function to find the longest common prefix string amongst an array of strings. + +If there is no common prefix, return an empty string "". + +Example 1: +Input: ["flower","flow","flight"] +Output: "fl" + +Example 2: +Input: ["dog","racecar","car"] +Output: "" +Explanation: There is no common prefix among the input strings. + +Reference: https://leetcode.com/problems/longest-common-prefix/description/ +""" + +""" +First solution: Horizontal scanning +""" +def common_prefix(s1, s2): + "Return prefix common of 2 strings" + if not s1 or not s2: + return "" + k = 0 + while s1[k] == s2[k]: + k = k + 1 + if k >= len(s1) or k >= len(s2): + return s1[0:k] + return s1[0:k] + +def longest_common_prefix_v1(strs): + if not strs: + return "" + result = strs[0] + for i in range(len(strs)): + result = common_prefix(result, strs[i]) + return result + +""" +Second solution: Vertical scanning +""" +def longest_common_prefix_v2(strs): + if not strs: + return "" + for i in range(len(strs[0])): + for string in strs[1:]: + if i == len(string) or string[i] != strs[0][i]: + return strs[0][0:i] + return strs[0] + +""" +Third solution: Divide and Conquer +""" +def longest_common_prefix_v3(strs): + if not strs: + return "" + return longest_common(strs, 0, len(strs) -1) + +def longest_common(strs, left, right): + if left == right: + return strs[left] + mid = (left + right) // 2 + lcp_left = longest_common(strs, left, mid) + lcp_right = longest_common(strs, mid + 1, right) + return common_prefix(lcp_left, lcp_right) diff --git a/algorithms/strings/repeat_substring.py b/algorithms/strings/repeat_substring.py new file mode 100644 index 000000000..0f26c2819 --- /dev/null +++ b/algorithms/strings/repeat_substring.py @@ -0,0 +1,25 @@ +""" +Given a non-empty string check if it can be constructed by taking +a substring of it and appending multiple copies of the substring together. + +For example: +Input: "abab" +Output: True +Explanation: It's the substring "ab" twice. + +Input: "aba" +Output: False + +Input: "abcabcabcabc" +Output: True +Explanation: It's the substring "abc" four times. + +Reference: https://leetcode.com/problems/repeated-substring-pattern/description/ +""" +def repeat_substring(s): + """ + :type s: str + :rtype: bool + """ + str = (s + s)[1:-1] + return s in str diff --git a/algorithms/strings/rotate.py b/algorithms/strings/rotate.py new file mode 100644 index 000000000..7f713baf5 --- /dev/null +++ b/algorithms/strings/rotate.py @@ -0,0 +1,18 @@ +""" +Given a strings s and int k, return a string that rotates k times + +For example, +rotate("hello", 2) return "llohe" +rotate("hello", 5) return "hello" +rotate("hello", 6) return "elloh" +rotate("hello", 7) return "llohe" + +accepts two strings +returns bool +""" +def rotate(s, k): + double_s = s + s + if k <= len(s): + return double_s[k:k + len(s)] + else: + return double_s[k-len(s):k] diff --git a/tests/test_strings.py b/tests/test_strings.py index 0c77ac12a..4474b75b2 100644 --- a/tests/test_strings.py +++ b/tests/test_strings.py @@ -9,7 +9,7 @@ int_to_roman, is_palindrome, is_palindrome_reverse, is_palindrome_two_pointer, is_palindrome_stack, - is_rotated, + is_rotated, is_rotated_v1, license_number, make_sentence, is_merge_recursive, is_merge_iterative, @@ -32,7 +32,11 @@ count_binary_substring, repeat_string, text_justification, - min_distance + min_distance, + longest_common_prefix_v1, longest_common_prefix_v2, longest_common_prefix_v3, + rotate, + first_unique_char, + repeat_substring ) import unittest @@ -201,6 +205,21 @@ def test_is_rotated(self): self.assertFalse(is_rotated("hello", "lloh")) self.assertTrue(is_rotated("", "")) + def test_is_rotated_v1(self): + self.assertTrue(is_rotated_v1("hello", "hello")) + self.assertTrue(is_rotated_v1("hello", "llohe")) + self.assertFalse(is_rotated_v1("hello", "helol")) + self.assertFalse(is_rotated_v1("hello", "lloh")) + self.assertTrue(is_rotated_v1("", "")) + + +class TestRotated(unittest.TestCase): + def test_rotate(self): + self.assertEqual("llohe", rotate("hello", 2)) + self.assertEqual("hello", rotate("hello", 5)) + self.assertEqual("elloh", rotate("hello", 6)) + self.assertEqual("llohe", rotate("hello", 7)) + class TestLicenseNumber(unittest.TestCase): """[summary] @@ -475,6 +494,29 @@ def test_min_distance(self): self.assertEqual(2, min_distance("sea", "eat")) self.assertEqual(6, min_distance("abAlgocrithmf", "Algorithmmd")) +class TestLongestCommonPrefix(unittest.TestCase): + def test_longest_common_prefix(self): + # Test first solution + self.assertEqual("fl", longest_common_prefix_v1(["flower","flow","flight"])) + self.assertEqual("", longest_common_prefix_v1(["dog","racecar","car"])) + # Test second solution + self.assertEqual("fl", longest_common_prefix_v2(["flower","flow","flight"])) + self.assertEqual("", longest_common_prefix_v2(["dog","racecar","car"])) + # Test third solution + self.assertEqual("fl", longest_common_prefix_v3(["flower","flow","flight"])) + self.assertEqual("", longest_common_prefix_v3(["dog","racecar","car"])) + +class TestFirstUniqueChar(unittest.TestCase): + def test_first_unique_char(self): + self.assertEqual(0, first_unique_char("leetcode")) + self.assertEqual(2, first_unique_char("loveleetcode")) + +class TestRepeatSubstring(unittest.TestCase): + def test_repeat_substring(self): + self.assertTrue(repeat_substring("abab")) + self.assertFalse(repeat_substring("aba")) + self.assertTrue(repeat_substring("abcabcabcabc")) + if __name__ == "__main__": unittest.main() From 3879607757f2e2a3d4e48a342636d6d593a840a0 Mon Sep 17 00:00:00 2001 From: RenliangShi <41174348+RenliangShi@users.noreply.github.com> Date: Mon, 6 Aug 2018 11:03:03 +0800 Subject: [PATCH 387/387] generate_parenthesis (#384) * generate_parenthesis * format --- algorithms/backtrack/generate_parenthesis.py | 20 +++++++++++++++++--- tests/test_backtrack.py | 14 ++++++++++++++ 2 files changed, 31 insertions(+), 3 deletions(-) diff --git a/algorithms/backtrack/generate_parenthesis.py b/algorithms/backtrack/generate_parenthesis.py index 9b9eb8cf1..073cec96a 100644 --- a/algorithms/backtrack/generate_parenthesis.py +++ b/algorithms/backtrack/generate_parenthesis.py @@ -14,16 +14,30 @@ """ -def generate_parenthesis(n): +def generate_parenthesis_v1(n): def add_pair(res, s, left, right): if left == 0 and right == 0: res.append(s) return if right > 0: - add_pair(res, s+")", left, right-1) + add_pair(res, s + ")", left, right - 1) if left > 0: - add_pair(res, s+"(", left-1, right+1) + add_pair(res, s + "(", left - 1, right + 1) res = [] add_pair(res, "", n, 0) return res + + +def generate_parenthesis_v2(n): + def add_pair(res, s, left, right): + if left == 0 and right == 0: + res.append(s) + if left > 0: + add_pair(res, s + "(", left - 1, right) + if right > 0 and left < right: + add_pair(res, s + ")", left, right - 1) + + res = [] + add_pair(res, "", n, n) + return res diff --git a/tests/test_backtrack.py b/tests/test_backtrack.py index dd290f759..c53f9f1e1 100644 --- a/tests/test_backtrack.py +++ b/tests/test_backtrack.py @@ -11,6 +11,7 @@ ) import unittest +from algorithms.backtrack.generate_parenthesis import * class TestAddOperator(unittest.TestCase): @@ -170,3 +171,16 @@ def test_pattern_match(self): self.assertTrue(pattern_match(pattern1, string1)) self.assertTrue(pattern_match(pattern2, string2)) self.assertFalse(pattern_match(pattern3, string3)) + +class TestGenerateParenthesis(unittest.TestCase): + + def test_generate_parenthesis(self): + self.assertEqual(generate_parenthesis_v1(2), ['()()', '(())']) + self.assertEqual(generate_parenthesis_v1(3), ['()()()', '()(())', '(())()', '(()())', '((()))']) + self.assertEqual(generate_parenthesis_v2(2), ['(())', '()()']) + self.assertEqual(generate_parenthesis_v2(3), ['((()))', '(()())', '(())()', '()(())', '()()()']) + +if __name__ == '__main__': + + unittest.main() +