# This list is from: # https://www.teamblind.com/post/New-Year-Gift---Curated-List-of-Top-100-LeetCode-Questions-to-Save-Your-Time-OaM1orEU * Array ** DONE Two Sum https://leetcode.com/problems/two-sum/ ** DONE Best Time to Buy and Sell Stock https://leetcode.com/problems/best-time-to-buy-and-sell-stock/ ** DONE Contains Duplicate https://leetcode.com/problems/contains-duplicate/ ** DONE Product of Array Except Self https://leetcode.com/problems/product-of-array-except-self/ ** DONE Maximum Subarray https://leetcode.com/problems/maximum-subarray/ ** DONE Maximum Product Subarray https://leetcode.com/problems/maximum-product-subarray/ ** DONE Find Minimum in Rotated Sorted Array https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/ ** DONE Search in Rotated Sorted Array https://leetcode.com/problems/search-in-rotated-sorted-array/ ** DONE 3Sum https://leetcode.com/problems/3sum/ ** DONE Container With Most Water https://leetcode.com/problems/container-with-most-water/ * Binary ** TODO Sum of Two Integers https://leetcode.com/problems/sum-of-two-integers/ ** DONE Number of 1 Bits https://leetcode.com/problems/number-of-1-bits/ ** TODO Counting Bits https://leetcode.com/problems/counting-bits/ ** DONE Missing Number https://leetcode.com/problems/missing-number/ ** TODO Reverse Bits https://leetcode.com/problems/reverse-bits/ * Dynamic Programming ** TODO Climbing Stairs https://leetcode.com/problems/climbing-stairs/ ** TODO Coin Change https://leetcode.com/problems/coin-change/ ** TODO Longest Increasing Subsequence https://leetcode.com/problems/longest-increasing-subsequence/ ** TODO Longest Common Subsequence ** DONE Word Break Problem https://leetcode.com/problems/word-break/ ** TODO Combination Sum https://leetcode.com/problems/combination-sum-iv/ ** TODO House Robber https://leetcode.com/problems/house-robber/ ** TODO House Robber II https://leetcode.com/problems/house-robber-ii/ ** TODO Decode Ways https://leetcode.com/problems/decode-ways/ ** TODO Unique Paths https://leetcode.com/problems/unique-paths/ ** TODO Jump Game https://leetcode.com/problems/jump-game/ * Graph ** DONE Clone Graph https://leetcode.com/problems/clone-graph/ ** DONE Course Schedule https://leetcode.com/problems/course-schedule/ ** TODO Pacific Atlantic Water Flow https://leetcode.com/problems/pacific-atlantic-water-flow/ ** DONE Number of Islands https://leetcode.com/problems/number-of-islands/ ** TODO Longest Consecutive Sequence https://leetcode.com/problems/longest-consecutive-sequence/ ** TODO Alien Dictionary (Leetcode Premium) https://leetcode.com/problems/alien-dictionary/ ** TODO Graph Valid Tree (Leetcode Premium) https://leetcode.com/problems/graph-valid-tree/ ** DONE Number of Connected Components in an Undirected Graph (Leetcode Premium) https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph/ * Interval ** TODO Insert Interval https://leetcode.com/problems/insert-interval/ ** DONE Merge Intervals https://leetcode.com/problems/merge-intervals/ ** TODO No Overlapping Intervals https://leetcode.com/problems/non-overlapping-intervals/ ** DONE Meeting Rooms (Leetcode Premium) https://leetcode.com/problems/meeting-rooms/ ** TODO Meeting Rooms II (Leetcode Premium) https://leetcode.com/problems/meeting-rooms-ii/ * Linked List ** DONE Reverse a Linked List https://leetcode.com/problems/reverse-linked-list/ ** DONE Detect Cycle in a Linked List https://leetcode.com/problems/linked-list-cycle/ ** DONE Merge Two Sorted Lists https://leetcode.com/problems/merge-two-sorted-lists/ ** DONE Merge K Sorted Lists https://leetcode.com/problems/merge-k-sorted-lists/ ** DONE Remove Nth Node From End Of List https://leetcode.com/problems/remove-nth-node-from-end-of-list/ ** DONE Reorder List https://leetcode.com/problems/reorder-list/ * Matrix ** DONE Set Matrix Zeroes https://leetcode.com/problems/set-matrix-zeroes/ ** DONE Spiral Matrix https://leetcode.com/problems/spiral-matrix/ ** TODO Rotate Image https://leetcode.com/problems/rotate-image/ ** DONE Word Search https://leetcode.com/problems/word-search/ * String ** TODO Longest Substring Without Repeating Characters https://leetcode.com/problems/longest-substring-without-repeating-characters/ ** TODO Longest Repeating Character Replacement https://leetcode.com/problems/longest-repeating-character-replacement/ ** TODO Minimum Window Substring https://leetcode.com/problems/minimum-window-substring/ ** TODO Valid Anagram https://leetcode.com/problems/valid-anagram/ ** TODO Group Anagrams https://leetcode.com/problems/group-anagrams/ ** DONE Valid Parentheses https://leetcode.com/problems/valid-parentheses/ ** DONE Valid Palindrome https://leetcode.com/problems/valid-palindrome/ ** TODO Longest Palindromic Substring https://leetcode.com/problems/longest-palindromic-substring/ ** TODO Palindromic Substrings https://leetcode.com/problems/palindromic-substrings/ ** TODO Encode and Decode Strings (Leetcode Premium) https://leetcode.com/problems/encode-and-decode-strings/ * Tree ** DONE Maximum Depth of Binary Tree https://leetcode.com/problems/maximum-depth-of-binary-tree/ ** DONE Same Tree https://leetcode.com/problems/same-tree/ ** DONE Invert/Flip Binary Tree https://leetcode.com/problems/invert-binary-tree/ ** DONE Binary Tree Maximum Path Sum https://leetcode.com/problems/binary-tree-maximum-path-sum/ ** DONE Binary Tree Level Order Traversal https://leetcode.com/problems/binary-tree-level-order-traversal/ ** DONE Serialize and Deserialize Binary Tree https://leetcode.com/problems/serialize-and-deserialize-binary-tree/ ** DONE Subtree of Another Tree https://leetcode.com/problems/subtree-of-another-tree/ ** TODO Construct Binary Tree from Preorder and Inorder Traversal https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/ ** TODO Validate Binary Search Tree https://leetcode.com/problems/validate-binary-search-tree/ ** TODO Kth Smallest Element in a BST https://leetcode.com/problems/kth-smallest-element-in-a-bst/ ** DONE Lowest Common Ancestor of BST https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/ ** DONE Implement Trie (Prefix Tree) https://leetcode.com/problems/implement-trie-prefix-tree/ ** DONE Add and Search Word https://leetcode.com/problems/add-and-search-word-data-structure-design/ ** DONE Word Search II https://leetcode.com/problems/word-search-ii/ * Heap ** DONE Merge K Sorted Lists https://leetcode.com/problems/merge-k-sorted-lists/ ** DONE Top K Frequent Elements https://leetcode.com/problems/top-k-frequent-elements/ ** DONE Find Median from Data Stream https://leetcode.com/problems/find-median-from-data-stream/