Top Facebook Questions

# Title Frequency Solution Acceptance Difficulty
# Title Frequency Solution Acceptance Difficulty
534 Design TinyURL 99 0.0%
1 Two Sum 99 Link 36.4%
13 Roman to Integer 99 47.0%
461 Hamming Distance 98 69.7%
20 Valid Parentheses 95 33.7%
535 Encode and Decode TinyURL 94 Link 74.1%
206 Reverse Linked List 94 Link 46.3%
146 LRU Cache 94 18.9%
283 Move Zeroes 93 Link 50.9%
23 Merge k Sorted Lists 92 Link 27.8%
121 Best Time to Buy and Sell Stock 91 Link 42.2%
38 Count and Say 91 35.9%
15 3Sum 90 21.8%
10 Regular Expression Matching 89 Link 24.3%
238 Product of Array Except Self 89 49.9%
17 Letter Combinations of a Phone Number 88 35.6%
50 Pow(x, n) 88 26.0%
88 Merge Sorted Array 88 32.1%
67 Add Binary 87 33.4%
139 Word Break 86 Link 30.9%
26 Remove Duplicates from Sorted Array 86 Link 35.6%
200 Number of Islands 85 Link 35.8%
49 Group Anagrams 85 Link 36.8%
56 Merge Intervals 85 Link 31.2%
234 Palindrome Linked List 84 33.2%
33 Search in Rotated Sorted Array 82 32.1%
28 Implement strStr() 82 28.7%
85 Maximal Rectangle 81 29.0%
173 Binary Search Tree Iterator 81 42.7%
128 Longest Consecutive Sequence 79 Link 37.7%
235 Lowest Common Ancestor of a Binary Search Tree 79 39.5%
273 Integer to English Words 78 22.5%
69 Sqrt(x) 75 28.4%
43 Multiply Strings 74 27.7%
79 Word Search 73 27.6%
218 The Skyline Problem 73 28.4%
236 Lowest Common Ancestor of a Binary Tree 70 30.0%
127 Word Ladder 69 19.7%
125 Valid Palindrome 68 26.7%
168 Excel Sheet Column Title 67 26.8%
76 Minimum Window Substring 67 26.3%
297 Serialize and Deserialize Binary Tree 66 34.1%
215 Kth Largest Element in an Array 65 40.0%
78 Subsets 65 42.9%
278 First Bad Version 65 Link 25.9%
301 Remove Invalid Parentheses 64 35.6%
102 Binary Tree Level Order Traversal 64 41.3%
341 Flatten Nested List Iterator 62 42.4%
75 Sort Colors 62 38.5%
91 Decode Ways 61 20.1%
208 Implement Trie (Prefix Tree) 61 Link 29.8%
647 Palindromic Substrings 60 Link 55.7%
282 Expression Add Operators 60 30.4%
257 Binary Tree Paths 59 40.0%
133 Clone Graph 59 25.2%
253 Meeting Rooms II 58 39.4%
334 Increasing Triplet Subsequence 58 39.9%
621 Task Scheduler 58 Link 42.5%
25 Reverse Nodes in k-Group 58 31.1%
44 Wildcard Matching 56 20.7%
71 Simplify Path 55 25.9%
80 Remove Duplicates from Sorted Array II 54 36.5%
68 Text Justification 53 19.7%
311 Sparse Matrix Multiplication 52 52.0%
269 Alien Dictionary 51 25.5%
221 Maximal Square 51 Link 29.8%
277 Find the Celebrity 51 35.8%
161 One Edit Distance 50 31.6%
380 Insert Delete GetRandom O(1) 50 39.5%
98 Validate Binary Search Tree 49 23.8%
57 Insert Interval 49 28.5%
543 Diameter of Binary Tree 48 Link 44.8%
209 Minimum Size Subarray Sum 46 Link 31.5%
252 Meeting Rooms 46 Link 48.5%
117 Populating Next Right Pointers in Each Node II 46 33.9%
274 H-Index 45 Link 33.6%
325 Maximum Size Subarray Sum Equals k 44 43.1%
285 Inorder Successor in BST 43 36.3%
377 Combination Sum IV 42 42.5%
653 Two Sum IV - Input is a BST 42 Link 50.2%
90 Subsets II 41 37.4%
157 Read N Characters Given Read4 40 29.2%
674 Longest Continuous Increasing Subsequence 39 Link 42.7%
404 Sum of Left Leaves 38 47.3%
410 Split Array Largest Sum 38 Link 38.8%
637 Average of Levels in Binary Tree 38 Link 55.7%
158 Read N Characters Given Read4 II - Call multiple times 37 24.6%
286 Walls and Gates 34 Link 45.0%
275 H-Index II 33 34.7%
210 Course Schedule II 31 29.4%
314 Binary Tree Vertical Order Traversal 31 37.5%
670 Maximum Swap 31 Link 38.3%
211 Add and Search Word - Data structure design 30 24.3%
680 Valid Palindrome II 29 Link 32.6%
689 Maximum Sum of 3 Non-Overlapping Subarrays 29 Link 41.3%
572 Subtree of Another Tree 28 Link 40.7%
494 Target Sum 28 Link 43.7%
673 Number of Longest Increasing Subsequence 28 Link 31.2%
477 Total Hamming Distance 27 Link 47.7%
636 Exclusive Time of Functions 25 Link 44.0%
714 Best Time to Buy and Sell Stock with Transaction Fee 24 Link 42.2%
525 Contiguous Array 23 Link 41.1%
642 Design Search Autocomplete System 22 Link 31.0%
398 Random Pick Index 22 44.1%
554 Brick Wall 18 Link 46.1%
261 Graph Valid Tree 18 38.2%
265 Paint House II 17 38.2%
523 Continuous Subarray Sum 17 Link 23.3%
597 Friend Requests I: Overall Acceptance Rate 13 Link 37.9%
639 Decode Ways II 9 Link 24.4%
745 Prefix and Suffix Search 6 Link 21.5%
721 Accounts Merge 2 Link 30.1%
578 Get Highest Answer Rate Question 2 Link 28.1%
602 Friend Requests II: Who Has the Most Friends 0 Link 42.1%
750 Number Of Corner Rectangles 0 Link 46.5%
764 Largest Plus Sign 0 Link 32.0%
# Title Frequency Solution Acceptance Difficulty
# Title Frequency Solution Acceptance Difficulty
253 Meeting Rooms II 58 39.4%
311 Sparse Matrix Multiplication 52 52.0%
269 Alien Dictionary 51 25.5%
277 Find the Celebrity 51 35.8%
161 One Edit Distance 50 31.6%
252 Meeting Rooms 46 Link 48.5%
325 Maximum Size Subarray Sum Equals k 44 43.1%
285 Inorder Successor in BST 43 36.3%
157 Read N Characters Given Read4 40 29.2%
158 Read N Characters Given Read4 II - Call multiple times 37 24.6%
286 Walls and Gates 34 Link 45.0%
314 Binary Tree Vertical Order Traversal 31 37.5%
642 Design Search Autocomplete System 22 Link 31.0%
261 Graph Valid Tree 18 38.2%
265 Paint House II 17 38.2%
597 Friend Requests I: Overall Acceptance Rate 13 Link 37.9%
578 Get Highest Answer Rate Question 2 Link 28.1%
602 Friend Requests II: Who Has the Most Friends 0 Link 42.1%
750 Number Of Corner Rectangles 0 Link 46.5%