All companies
Yahoo
11 Easy19 Medium3 Hard33 total
| No. | Problem | Difficulty | Frequency |
|---|---|---|---|
| 1 | Two Sum | Easy | |
| 4 | Median of Two Sorted Arrays | Hard | |
| 13 | Roman to Integer | Easy | |
| 104 | Maximum Depth of Binary Tree | Easy | |
| 139 | Word Break | Medium | |
| 141 | Linked List Cycle | Easy | |
| 146 | LRU Cache | Medium | |
| 206 | Reverse Linked List | Easy | |
| 217 | Contains Duplicate | Easy | |
| 284 | Peeking Iterator | Medium | |
| 297 | Serialize and Deserialize Binary Tree | Hard | |
| 479 | Largest Palindrome Product | Hard | |
| 491 | Non-decreasing Subsequences | Medium | |
| 624 | Maximum Distance in Arrays | Medium | |
| 693 | Binary Number with Alternating Bits | Easy | |
| 1030 | Matrix Cells in Distance Order | Easy | |
| 347 | Top K Frequent Elements | Medium | |
| 39 | Combination Sum | Medium | |
| 9 | Palindrome Number | Easy | |
| 14 | Longest Common Prefix | Easy | |
| 20 | Valid Parentheses | Easy | |
| 33 | Search in Rotated Sorted Array | Medium | |
| 54 | Spiral Matrix | Medium | |
| 98 | Validate Binary Search Tree | Medium | |
| 394 | Decode String | Medium | |
| 560 | Subarray Sum Equals K | Medium | |
| 1091 | Shortest Path in Binary Matrix | Medium | |
| 93 | Restore IP Addresses | Medium | |
| 399 | Evaluate Division | Medium | |
| 341 | Flatten Nested List Iterator | Medium | |
| 162 | Find Peak Element | Medium | |
| 79 | Word Search | Medium | |
| 253 | Meeting Rooms II | Medium |