leetcode
Leetcode
Goldman Sachs
[26. Remove Duplicates from sorted array I]
[Quick Sort]
[Merge Sort]
Backtracking
LinkedList
[19. Remove Nth Node From End of List]
[24. Swap Nodes in Pairs]
[61. Rotate List]
[147. Insertion Sort List]
[328. Odd Even Linked List]
[142. Linked List Cycle II]
Recursion
[29. Divide Two Integers]
[547. Friend Circles]
Pocket Gems
[547. Friend Circles]
[126. Word Ladder II]
[28. strStr]
[431. Find the Connected Component in the Undirected Graph]
[200. Number of Islands II]
Sort
[347. Top K Frequent Elements]
String
[387. First Unique Character in a String]
[String Compression]
[438. Find All Anagrams in a String]
Array
[532. K-diff Pairs in an Array]
[Count pairs with given sum]
[4. Median of Two Sorted Array]
[36. Valid Sudoku]
[49. Group Anagrams]
[739. Daily Temperatures]
[84. Largest Rectangle in Histogram]
[42. Trapping Rain Water]
[53. Maximum Subarray]
[316. Remove Duplicate Letters]
[581. Shortest Unsorted Continuous Subarray]
HashMap
[525. Contiguous Array]
[508. Most Frequent Subtree Sum]
DP
[198. House Robber]
[416. Partition Equal Subset Sum]
[740. Delete and Earn]
[300. Longest Increasing Subsequence]
[Coins in a line]
[Copy Books]
Tree
[687. Longest Univalue Path]
[669. Trim a Binary Search Tree]
[116. Populating Next Right Pointers in Each Node]
[117. Populating Next Right Pointers in Each Node II]
[129. Sum Root to Leaf Numbers]
[114. Flatten Binary Tree to Linked List]
[230. Kth smallest element in a BST]
[105. Construct Binary Tree from Preorder and Inorder Traversal]
[449. Serialize and Deserialize BST]
[337. House Robber III]
[652. Find Duplicate Subtrees]
[662. Maximum Width of Binary Tree]
[655. Print Binary Tree]
[99. Recover Binary Search Tree]
[654. Maximum Binary Tree]
[250. Count Univalue Subtrees]
BFS/DFS
[207. Course Schedule]
[332. Reconstruct Itinerary]
[494. Target Sum]
[473. Matchsticks to Square]
[301. Remove Invalid Parentheses]
[329. Longest Increasing Path in a Matrix]
[279. Perfect Squares]
[286. Walls and Gates]
[317. Shortest Distance from All Buildings]
Union-Find
[261. Graph Valid Tree]
Two Pointers
[287. Find the Duplicate Number]
Binary Search
[209. Minimum Size Subarray Sum]
[378. Kth Smallest Element in a Sorted Matrix]
Heap
[LC. Heapify]
[295. Find Median from Data Stream]
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