Facebook

772. Group Anagrams 744. Sum of first K even-length Palindrome numbers 723. Rotate Bits - Left 722. Maximum Subarray VI 721. Next Sparse Number 720. Rearrange a String With Integers 719. Calculate Maximum Value 691. BST Swapped Nodes 602. Russian Doll Envelopes 616. Course Schedule II 653. Add Operators 656. Big Integer multiplication 657. Insert Delete GetRandom O(1) 640. Edit Distance II 516. Paint House II 178. Graph Valid Tree 480. Binary Tree Paths 425. Letter Combinations of a Phone Number 450. Reverse Nodes in k-Group 442. Implement Trie 436. Maximal Square 433. Number of Islands 428. Pow(x, n) 420. Count and Say 415. Valid Palindrome 406. Minimum Size Subarray Sum 408. Add Binary 171. Anagrams 154. Regular Expression Matching 149. Best Time to Buy and Sell Stock 148. Sort Colors 141. Sqrt(x) 137. Clone Graph 123. Word Search 104. Merge k Sorted Lists 101. Remove Duplicates from Sorted Array II 100. Remove Duplicates from Sorted Array 88. Lowest Common Ancestor 86. Binary Search Tree Iterator 74. First Bad Version 69. Binary Tree Level Order Traversal 64. Merge Sorted Array 62. Search in Rotated Sorted Array 57. 3Sum 56. Two Sum 35. Reverse Linked List 32. Minimum Window Substring 17. Subsets 13. strStr
Problem Distribution Leaderboard
  • 10 Array
  • 9 String
  • 7 Two Pointers
  • 5 Binary Search
  • 5 Binary Tree
  • 4 Dynamic Programming
  • 4 Breadth First Search
  • 4 Hash Table
  • 4 Mathematics
  • 3 Sort