LeetCode

Collection of my LeetCode Solutions

Created using LeetHub

LeetCode Topics

Array


0001-two-sum
0011-container-with-most-water
0015-3sum
0049-group-anagrams
0056-merge-intervals
0121-best-time-to-buy-and-sell-stock
0153-find-minimum-in-rotated-sorted-array
0200-number-of-islands
0217-contains-duplicate
0283-move-zeroes
0347-top-k-frequent-elements
0605-can-place-flowers
0643-maximum-average-subarray-i
0724-find-pivot-index
0792-binary-search
1319-unique-number-of-occurrences
1392-find-the-difference-of-two-arrays
1528-kids-with-the-greatest-number-of-candies
2232-adding-spaces-to-a-string
2308-divide-array-into-equal-pairs
2478-longest-nice-subarray
2552-maximum-sum-of-distinct-subarrays-with-length-k
3154-maximum-value-of-an-ordered-triplet-i
3430-count-days-without-meetings
3475-minimum-operations-to-make-binary-array-elements-equal-to-one-i

Hash Table


0001-two-sum
0003-longest-substring-without-repeating-characters
0049-group-anagrams
0217-contains-duplicate
0242-valid-anagram
0347-top-k-frequent-elements
0424-longest-repeating-character-replacement
0768-partition-labels
1319-unique-number-of-occurrences
1392-find-the-difference-of-two-arrays
2308-divide-array-into-equal-pairs
2552-maximum-sum-of-distinct-subarrays-with-length-k

Sliding Window


0003-longest-substring-without-repeating-characters
0424-longest-repeating-character-replacement
0643-maximum-average-subarray-i
2478-longest-nice-subarray
2552-maximum-sum-of-distinct-subarrays-with-length-k
3475-minimum-operations-to-make-binary-array-elements-equal-to-one-i

Two Pointers


0005-longest-palindromic-substring
0011-container-with-most-water
0015-3sum
0125-valid-palindrome
0283-move-zeroes
0345-reverse-vowels-of-a-string
0392-is-subsequence
0768-partition-labels
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
1894-merge-strings-alternately
2232-adding-spaces-to-a-string

String


0003-longest-substring-without-repeating-characters
0005-longest-palindromic-substring
0049-group-anagrams
0125-valid-palindrome
0242-valid-anagram
0345-reverse-vowels-of-a-string
0392-is-subsequence
0424-longest-repeating-character-replacement
0768-partition-labels
1146-greatest-common-divisor-of-strings
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
1894-merge-strings-alternately
2232-adding-spaces-to-a-string
2470-removing-stars-from-a-string

String Matching


1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence

Simulation


2232-adding-spaces-to-a-string
2470-removing-stars-from-a-string

Linked List


0002-add-two-numbers
0021-merge-two-sorted-lists
0206-reverse-linked-list

Recursion


0002-add-two-numbers
0021-merge-two-sorted-lists
0206-reverse-linked-list

Tree


0100-same-tree
0104-maximum-depth-of-binary-tree
0226-invert-binary-tree
0774-maximum-depth-of-n-ary-tree
2493-reverse-odd-levels-of-binary-tree

Depth-First Search


0100-same-tree
0104-maximum-depth-of-binary-tree
0200-number-of-islands
0226-invert-binary-tree
0774-maximum-depth-of-n-ary-tree
2493-reverse-odd-levels-of-binary-tree

Breadth-First Search


0100-same-tree
0104-maximum-depth-of-binary-tree
0200-number-of-islands
0226-invert-binary-tree
0774-maximum-depth-of-n-ary-tree
2493-reverse-odd-levels-of-binary-tree

Binary Tree


0100-same-tree
0104-maximum-depth-of-binary-tree
0226-invert-binary-tree
2493-reverse-odd-levels-of-binary-tree

Math


0002-add-two-numbers
0070-climbing-stairs
1146-greatest-common-divisor-of-strings

Dynamic Programming


0005-longest-palindromic-substring
0070-climbing-stairs
0121-best-time-to-buy-and-sell-stock
0392-is-subsequence

Stack


2470-removing-stars-from-a-string

Bit Manipulation


2308-divide-array-into-equal-pairs
2478-longest-nice-subarray
3475-minimum-operations-to-make-binary-array-elements-equal-to-one-i

Counting


0347-top-k-frequent-elements
2308-divide-array-into-equal-pairs

Queue


3475-minimum-operations-to-make-binary-array-elements-equal-to-one-i

Prefix Sum


0724-find-pivot-index
3475-minimum-operations-to-make-binary-array-elements-equal-to-one-i

Greedy


0011-container-with-most-water
0605-can-place-flowers
0768-partition-labels

Sorting


0015-3sum
0049-group-anagrams
0056-merge-intervals
0217-contains-duplicate
0242-valid-anagram
0347-top-k-frequent-elements
3430-count-days-without-meetings

Divide and Conquer


0347-top-k-frequent-elements

Heap (Priority Queue)


0347-top-k-frequent-elements

Bucket Sort


0347-top-k-frequent-elements

Quickselect


0347-top-k-frequent-elements

Binary Search


0153-find-minimum-in-rotated-sorted-array
0792-binary-search

Union Find


0200-number-of-islands

Matrix


0200-number-of-islands

Memoization


0070-climbing-stairs

Name		Name	Last commit message	Last commit date
Latest commit History 392 Commits
0001-two-sum		0001-two-sum
0002-add-two-numbers		0002-add-two-numbers
0003-longest-substring-without-repeating-characters		0003-longest-substring-without-repeating-characters
0005-longest-palindromic-substring		0005-longest-palindromic-substring
0008-string-to-integer-atoi		0008-string-to-integer-atoi
0011-container-with-most-water		0011-container-with-most-water
0014-longest-common-prefix		0014-longest-common-prefix
0015-3sum		0015-3sum
0020-valid-parentheses		0020-valid-parentheses
0021-merge-two-sorted-lists		0021-merge-two-sorted-lists
0028-find-the-index-of-the-first-occurrence-in-a-string		0028-find-the-index-of-the-first-occurrence-in-a-string
0049-group-anagrams		0049-group-anagrams
0050-powx-n		0050-powx-n
0056-merge-intervals		0056-merge-intervals
0067-add-binary		0067-add-binary
0070-climbing-stairs		0070-climbing-stairs
0100-same-tree		0100-same-tree
0104-maximum-depth-of-binary-tree		0104-maximum-depth-of-binary-tree
0111-minimum-depth-of-binary-tree		0111-minimum-depth-of-binary-tree
0121-best-time-to-buy-and-sell-stock		0121-best-time-to-buy-and-sell-stock
0122-best-time-to-buy-and-sell-stock-ii		0122-best-time-to-buy-and-sell-stock-ii
0125-valid-palindrome		0125-valid-palindrome
0138-copy-list-with-random-pointer		0138-copy-list-with-random-pointer
0141-linked-list-cycle		0141-linked-list-cycle
0145-binary-tree-postorder-traversal		0145-binary-tree-postorder-traversal
0153-find-minimum-in-rotated-sorted-array		0153-find-minimum-in-rotated-sorted-array
0155-min-stack		0155-min-stack
0167-two-sum-ii-input-array-is-sorted		0167-two-sum-ii-input-array-is-sorted
0175-combine-two-tables		0175-combine-two-tables
0182-duplicate-emails		0182-duplicate-emails
0200-number-of-islands		0200-number-of-islands
0206-reverse-linked-list		0206-reverse-linked-list
0217-contains-duplicate		0217-contains-duplicate
0219-contains-duplicate-ii		0219-contains-duplicate-ii
0226-invert-binary-tree		0226-invert-binary-tree
0234-palindrome-linked-list		0234-palindrome-linked-list
0242-valid-anagram		0242-valid-anagram
0283-move-zeroes		0283-move-zeroes
0287-find-the-duplicate-number		0287-find-the-duplicate-number
0345-reverse-vowels-of-a-string		0345-reverse-vowels-of-a-string
0347-top-k-frequent-elements		0347-top-k-frequent-elements
0383-ransom-note		0383-ransom-note
0392-is-subsequence		0392-is-subsequence
0412-fizz-buzz		0412-fizz-buzz
0424-longest-repeating-character-replacement		0424-longest-repeating-character-replacement
0509-fibonacci-number		0509-fibonacci-number
0590-n-ary-tree-postorder-traversal		0590-n-ary-tree-postorder-traversal
0605-can-place-flowers		0605-can-place-flowers
0624-maximum-distance-in-arrays		0624-maximum-distance-in-arrays
0643-maximum-average-subarray-i		0643-maximum-average-subarray-i
0670-maximum-swap		0670-maximum-swap
0704-binary-search		0704-binary-search
0724-find-pivot-index		0724-find-pivot-index
0746-min-cost-climbing-stairs		0746-min-cost-climbing-stairs
0768-partition-labels		0768-partition-labels
0774-maximum-depth-of-n-ary-tree		0774-maximum-depth-of-n-ary-tree
0792-binary-search		0792-binary-search
0874-walking-robot-simulation		0874-walking-robot-simulation
1-two-sum		1-two-sum
1137-n-th-tribonacci-number		1137-n-th-tribonacci-number
1146-greatest-common-divisor-of-strings		1146-greatest-common-divisor-of-strings
12-integer-to-roman		12-integer-to-roman
13-roman-to-integer		13-roman-to-integer
1319-unique-number-of-occurrences		1319-unique-number-of-occurrences
1337-the-k-weakest-rows-in-a-matrix		1337-the-k-weakest-rows-in-a-matrix
1342-number-of-steps-to-reduce-a-number-to-zero		1342-number-of-steps-to-reduce-a-number-to-zero
1392-find-the-difference-of-two-arrays		1392-find-the-difference-of-two-arrays
14-longest-common-prefix		14-longest-common-prefix
1480-running-sum-of-1d-array		1480-running-sum-of-1d-array
1528-kids-with-the-greatest-number-of-candies		1528-kids-with-the-greatest-number-of-candies
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence		1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
1672-richest-customer-wealth		1672-richest-customer-wealth
1894-merge-strings-alternately		1894-merge-strings-alternately
2-add-two-numbers		2-add-two-numbers
20-valid-parentheses		20-valid-parentheses
2095-delete-the-middle-node-of-a-linked-list		2095-delete-the-middle-node-of-a-linked-list
2169-count-operations-to-obtain-zero		2169-count-operations-to-obtain-zero
2232-adding-spaces-to-a-string		2232-adding-spaces-to-a-string
2293-min-max-game		2293-min-max-game
2308-divide-array-into-equal-pairs		2308-divide-array-into-equal-pairs
234-palindrome-linked-list		234-palindrome-linked-list
2470-removing-stars-from-a-string		2470-removing-stars-from-a-string
2478-longest-nice-subarray		2478-longest-nice-subarray
2493-reverse-odd-levels-of-binary-tree		2493-reverse-odd-levels-of-binary-tree
2552-maximum-sum-of-distinct-subarrays-with-length-k		2552-maximum-sum-of-distinct-subarrays-with-length-k
26-remove-duplicates-from-sorted-array		26-remove-duplicates-from-sorted-array
27-remove-element		27-remove-element
2732-counter		2732-counter
2813-to-be-or-not-to-be		2813-to-be-or-not-to-be
3154-maximum-value-of-an-ordered-triplet-i		3154-maximum-value-of-an-ordered-triplet-i
3430-count-days-without-meetings		3430-count-days-without-meetings
3475-minimum-operations-to-make-binary-array-elements-equal-to-one-i		3475-minimum-operations-to-make-binary-array-elements-equal-to-one-i
35-search-insert-position		35-search-insert-position
383-ransom-note		383-ransom-note
412-fizz-buzz		412-fizz-buzz
523-continuous-subarray-sum		523-continuous-subarray-sum
58-length-of-last-word		58-length-of-last-word
876-middle-of-the-linked-list		876-middle-of-the-linked-list
9-palindrome-number		9-palindrome-number
README.md		README.md

alexusljf/LeetCode

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LeetCode

LeetCode Topics

Array

Hash Table

Sliding Window

Two Pointers

String

String Matching

Simulation

Linked List

Recursion

Tree

Depth-First Search

Breadth-First Search

Binary Tree

Math

Dynamic Programming

Stack

Bit Manipulation

Counting

Queue

Prefix Sum

Greedy

Sorting

Divide and Conquer

Heap (Priority Queue)

Bucket Sort

Quickselect

Binary Search

Union Find

Matrix

Memoization

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