Solutions in Python, with explanations
Array
- - Two Sum - https://leetcode.com/problems/two-sum/
- - Best Time to Buy and Sell Stock - https://leetcode.com/problems/best-time-to-buy-and-sell-stock/
- - Contains Duplicate - https://leetcode.com/problems/contains-duplicate/
- - Product of Array Except Self - https://leetcode.com/problems/product-of-array-except-self/
- - Maximum Subarray - https://leetcode.com/problems/maximum-subarray/
- - Maximum Product Subarray - https://leetcode.com/problems/maximum-product-subarray/
- - Find Minimum in Rotated Sorted Array - https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/
- - Search in Rotated Sorted Array - https://leetcode.com/problems/search-in-rotated-sorted-array/
- - 3Sum - https://leetcode.com/problems/3sum/
- - Container With Most Water - https://leetcode.com/problems/container-with-most-water/
Binary
- - Number of 1 Bits - https://leetcode.com/problems/number-of-1-bits/
- - Counting Bits - https://leetcode.com/problems/counting-bits/
- - Missing Number - https://leetcode.com/problems/missing-number/
- - Reverse Bits - https://leetcode.com/problems/reverse-bits/
Dynamic Programming
- - Climbing Stairs - https://leetcode.com/problems/climbing-stairs/
- - Coin Change - https://leetcode.com/problems/coin-change/
- - Longest Increasing Subsequence - https://leetcode.com/problems/longest-increasing-subsequence/
- - Longest Common Subsequence - https://leetcode.com/problems/longest-common-subsequence/
- - Edit Distance - https://leetcode.com/problems/edit-distance/
- - Combination Sum - https://leetcode.com/problems/combination-sum-iv/
- - Minimum Cost For Tickets - https://leetcode.com/problems/minimum-cost-for-tickets/
- - House Robber - https://leetcode.com/problems/house-robber/
- - House Robber II - https://leetcode.com/problems/house-robber-ii/
- - Decode Ways - https://leetcode.com/problems/decode-ways/
- - Unique Paths - https://leetcode.com/problems/unique-paths/
- - Jump Game - https://leetcode.com/problems/jump-game/
- - Frog Jump - https://leetcode.com/problems/frog-jump/
- - Word Break - https://leetcode.com/problems/word-break/
- - Word Break II - https://leetcode.com/problems/word-break-ii/
Graph
- - Clone Graph - https://leetcode.com/problems/clone-graph/
- - Course Schedule - https://leetcode.com/problems/course-schedule/
- - Pacific Atlantic Water Flow - https://leetcode.com/problems/pacific-atlantic-water-flow/
- - Number of Islands - https://leetcode.com/problems/number-of-islands/
- - Longest Consecutive Sequence - https://leetcode.com/problems/longest-consecutive-sequence/
- - Alien Dictionary (Leetcode Premium) - https://leetcode.com/problems/alien-dictionary/
- - Graph Valid Tree (Leetcode Premium) - https://leetcode.com/problems/graph-valid-tree/
- - Number of Connected Components in an Undirected Graph (Leetcode Premium) - https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph/
Interval
- - Insert Interval - https://leetcode.com/problems/insert-interval/
- - Merge Intervals - https://leetcode.com/problems/merge-intervals/
- - Non-overlapping Intervals - https://leetcode.com/problems/non-overlapping-intervals/
- - Meeting Rooms (Leetcode Premium) - https://leetcode.com/problems/meeting-rooms/
- - Meeting Rooms II (Leetcode Premium) - https://leetcode.com/problems/meeting-rooms-ii/
- - Task Scheduler - https://leetcode.com/problems/task-scheduler/
Linked List
- - Reverse a Linked List - https://leetcode.com/problems/reverse-linked-list/
- - Detect Cycle in a Linked List - https://leetcode.com/problems/linked-list-cycle/
- - Merge Two Sorted Lists - https://leetcode.com/problems/merge-two-sorted-lists/
- - Merge K Sorted Lists - https://leetcode.com/problems/merge-k-sorted-lists/
- - Remove Nth Node From End Of List - https://leetcode.com/problems/remove-nth-node-from-end-of-list/
- - Reorder List - https://leetcode.com/problems/reorder-list/
Matrix
- - Set Matrix Zeroes - https://leetcode.com/problems/set-matrix-zeroes/
- - Spiral Matrix - https://leetcode.com/problems/spiral-matrix/
- - Rotate Image - https://leetcode.com/problems/rotate-image/
- - Word Search - https://leetcode.com/problems/word-search/
String
- - Longest Substring Without Repeating Characters - https://leetcode.com/problems/longest-substring-without-repeating-characters/
- - Longest Repeating Character Replacement - https://leetcode.com/problems/longest-repeating-character-replacement/
- - Minimum Window Substring - https://leetcode.com/problems/minimum-window-substring/
- - Valid Anagram - https://leetcode.com/problems/valid-anagram/
- - Group Anagrams - https://leetcode.com/problems/group-anagrams/
- - Valid Parentheses - https://leetcode.com/problems/valid-parentheses/
- - Valid Palindrome - https://leetcode.com/problems/valid-palindrome/
- - Longest Palindromic Substring - https://leetcode.com/problems/longest-palindromic-substring/
- - Palindromic Substrings - https://leetcode.com/problems/palindromic-substrings/
- - Encode and Decode Strings (Leetcode Premium) - https://leetcode.com/problems/encode-and-decode-strings/
- - Reorganize String - https://leetcode.com/problems/reorganize-string/
- - Reorganize String K Distance Apart - https://leetcode.com/problems/rearrange-string-k-distance-apart/
Tree
- - Maximum Depth of Binary Tree - https://leetcode.com/problems/maximum-depth-of-binary-tree/
- - Find Leaves of Binary Tree https://leetcode.com/problems/find-leaves-of-binary-tree/
- - Same Tree - https://leetcode.com/problems/same-tree/
- - Invert/Flip Binary Tree - https://leetcode.com/problems/invert-binary-tree/
- - Binary Tree Maximum Path Sum - https://leetcode.com/problems/binary-tree-maximum-path-sum/
- - Binary Tree Level Order Traversal - https://leetcode.com/problems/binary-tree-level-order-traversal/
- - Serialize and Deserialize Binary Tree - https://leetcode.com/problems/serialize-and-deserialize-binary-tree/
- - Subtree of Another Tree - https://leetcode.com/problems/subtree-of-another-tree/
- - Construct Binary Tree from Preorder and Inorder Traversal - https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/
- - Validate Binary Search Tree - https://leetcode.com/problems/validate-binary-search-tree/
- - Kth Smallest Element in a BST - https://leetcode.com/problems/kth-smallest-element-in-a-bst/
- - Lowest Common Ancestor of BST - https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/
- - Implement Trie (Prefix Tree) - https://leetcode.com/problems/implement-trie-prefix-tree/
- - Add and Search Word - https://leetcode.com/problems/add-and-search-word-data-structure-design/
- - Word Search II - https://leetcode.com/problems/word-search-ii/
Heap
- - Merge K Sorted Lists - https://leetcode.com/problems/merge-k-sorted-lists/
- - Top K Frequent Elements - https://leetcode.com/problems/top-k-frequent-elements/
- - Find Median from Data Stream - https://leetcode.com/problems/find-median-from-data-stream/