add 1 & 2

Author: codeestX

.gitignore

@@ -24,6 +24,7 @@ wheels/
 *.egg-info/
 .installed.cfg
 *.egg
+.DS_Store
 
 # PyInstaller
 #  Usually these files are written by a python script from a template

001/two_sum.py

@@ -0,0 +1,12 @@
+class Solution:
+    def twoSum(self, nums, target):
+        """
+        :type nums: List[int]
+        :type target: int
+        :rtype: List[int]
+        """
+        d = {}
+        for i, num in enumerate(nums):
+            if target - num in d:
+                return [d[target - num], i]
+            d[num] = i

002/add_two_numbers.py

@@ -0,0 +1,25 @@
+# Definition for singly-linked list.
+class ListNode(object):
+    def __init__(self, x):
+        self.val = x
+        self.next = None
+
+
+class Solution(object):
+    def addTwoNumbers(self, l1, l2):
+        """
+        :type l1: ListNode
+        :type l2: ListNode
+        :rtype: ListNode
+        """
+        temp = 1 if (l1.val + l2.val) >= 10 else 0
+        head = ListNode((l1.val + l2.val) % 10)
+        tail = head
+        while l1.next is not None or l2.next is not None or temp == 1:
+            l1 = l1.next if l1.next is not None else ListNode(0)
+            l2 = l2.next if l2.next is not None else ListNode(0)
+            node = ListNode((l1.val + l2.val + temp) % 10)
+            temp = 1 if (l1.val + l2.val + temp) >= 10 else 0
+            tail.next = node
+            tail = node
+        return head