Facebook(79)
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Two Sum 23.0% Easy
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13 Roman to Integer 39.2% Easy
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20 Valid Parentheses 29.3% Easy --------------------
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26 Remove Duplicates from Sorted Array 33.4% Easy
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28 Implement strStr() 24.8% Easy
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38 Count and Say 28.9% Easy
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67 Add Binary 27.4% Easy
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88 Merge Sorted Array 30.0% Easy
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102 Binary Tree Level Order Traversal 32.7% Easy
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121 Best Time to Buy and Sell Stock 36.0% Easy
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125 Valid Palindrome 23.8% Easy
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157 Read N Characters Given Read4 29.5% Easy
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168 Excel Sheet Column Title 21.6% Easy
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206 Reverse Linked List 39.4% Easy
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234 Palindrome Linked List 28.0% Easy
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235 Lowest Common Ancestor of a Binary Search Tree 37.7% Easy
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252 Meeting Rooms 41.6% Easy
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257 Binary Tree Paths 28.4% Easy
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278 First Bad Version 22.4% Easy
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283 Move Zeroes 44.0% Easy
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325 Maximum Size Subarray Sum Equals k 39.9% Easy
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15 3Sum 18.8% Medium
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17 Letter Combinations of a Phone Number 28.6% Medium --------------------
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43 Multiply Strings 23.4% Medium
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49 Group Anagrams 27.4% Medium
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50 Pow(x, n) 27.9% Medium
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69 Sqrt(x) 25.2% Medium
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71 Simplify Path 21.9% Medium
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75 Sort Colors 34.7% Medium
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78 Subsets 31.3% Medium
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79 Word Search 22.9% Medium
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80 Remove Duplicates from Sorted Array II 32.7% Medium
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90 Subsets II 30.5% Medium
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91 Decode Ways 17.5% Medium
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98 Validate Binary Search Tree 20.9% Medium
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127 Word Ladder 19.6% Medium
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133 Clone Graph 24.9% Medium
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139 Word Break 25.2% Medium
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161 One Edit Distance 28.4% Medium
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173 Binary Search Tree Iterator 34.5% Medium
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200 Number of Islands 27.6% Medium
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208 Implement Trie (Prefix Tree) 25.3% Medium
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209 Minimum Size Subarray Sum 26.8% Medium
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210 Course Schedule II 21.0% Medium
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211 Add and Search Word – Data structure design 20.2% Medium
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215 Kth Largest Element in an Array 33.1% Medium
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221 Maximal Square 23.5% Medium
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236 Lowest Common Ancestor of a Binary Tree 28.8% Medium
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238 Product of Array Except Self 42.6% Medium
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253 Meeting Rooms II 34.6% Medium
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261 Graph Valid Tree 32.5% Medium
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274 H-Index 29.3% Medium
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275 H-Index II 32.5% Medium
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277 Find the Celebrity 35.1% Medium
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285 Inorder Successor in BST 35.6% Medium
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286 Walls and Gates 37.2% Medium
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311 Sparse Matrix Multiplication 47.2% Medium
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314 Binary Tree Vertical Order Traversal 30.3% Medium
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334 Increasing Triplet Subsequence 33.2% Medium
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10 Regular Expression Matching 22.0% Hard
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23 Merge k Sorted Lists 23.3% Hard
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25 Reverse Nodes in k-Group 27.5% Hard
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33 Search in Rotated Sorted Array 30.2% Hard
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44 Wildcard Matching 17.4% Hard
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56 Merge Intervals 25.3% Hard
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57 Insert Interval 23.8% Hard
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76 Minimum Window Substring 21.2% Hard
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85 Maximal Rectangle 23.4% Hard
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117 Populating Next Right Pointers in Each Node II 32.8% Hard
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128 Longest Consecutive Sequence 32.1% Hard
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146 LRU Cache 15.8% Hard
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158 Read N Characters Given Read4 II – Call multiple times 23.4% Hard
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218 The Skyline Problem 22.0% Hard
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265 Paint House II 35.6% Hard
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269 Alien Dictionary 22.9% Hard
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273 Integer to English Words 18.7% Hard
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282 Expression Add Operators 24.8% Hard
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297 Serialize and Deserialize Binary Tree 27.8% Hard
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301 Remove Invalid Parentheses 31.9% Hard