New Year Gift to every fellow time-constrained engineer out there looking for a job, here's a list of the best LeetCode questions that teach you core concepts and techniques for each category/type of problems! Many other LeetCode questions are a mash of the techniques from these individual questions. I used this list in my last job hunt to only do the important questions. Good luck and Happy New Year! 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 - Sum of Two Integers - https://leetcode.com/problems/sum-of-two-integers/ - 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 - - Word Break Problem - https://leetcode.com/problems/word-break/ - Combination Sum - https://leetcode.com/problems/combination-sum-iv/ - 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/ --- 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/ --- 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/ --- Tree - Maximum Depth of Binary Tree - https://leetcode.com/problems/maximum-depth-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/ You're welcome!
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Saved.. you’re a god 🙏
Happy new year!
Thank you 🙏
🙏
Nerds are orgasming! Peace bro...
Sir. Sir. You forgot Cherry Picking #741.
Cherry Pickup gives me nightmares
You are the hero that blind don’t deserve
Thanks!!
Let the grind begin