Bloomberg
1239 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 146. LRU Cache | Medium | 71.7% | TopicsHash TableLinked ListDesignDoubly-Linked List |
| 560. Subarray Sum Equals K | Medium | 71.2% | TopicsArrayHash TablePrefix Sum |
| 1396. Design Underground System | Medium | 70.9% | TopicsHash TableStringDesign |
| Longest Consecutive Sequence | Medium | 70.6% | TopicsArrayHash TableUnion-Find |
| 155. Min Stack | Medium | 70.6% | TopicsStackDesign |
| 13. Roman to Integer | Easy | 70.1% | TopicsHash TableMathString |
| 49. Group Anagrams | Medium | 69.8% | TopicsArrayHash TableStringSorting |
| 78. Subsets | Medium | 69.5% | TopicsArrayBacktrackingBit Manipulation |
| 33. Search in Rotated Sorted Array | Medium | 69.2% | TopicsArrayBinary Search |
| Next Permutation | Medium | 68.9% | TopicsArrayTwo Pointers |
| 53. Maximum Subarray | Medium | 68% | TopicsArrayDivide and ConquerDynamic Programming |
| 70. Climbing Stairs | Easy | 68% | TopicsMathDynamic ProgrammingMemoization |
| 22. Generate Parentheses | Medium | 67.4% | TopicsStringDynamic ProgrammingBacktrackingBracket Sequences |
| 283. Move Zeroes | Easy | 67.1% | TopicsArrayTwo Pointers |
| 48. Rotate Image | Medium | 65.7% | TopicsArrayMathMatrix |
| 136. Single Number | Easy | 65% | TopicsArrayBit Manipulation |
| Meeting Rooms II | Medium | 64.6% | TopicsArrayTwo PointersGreedySortingHeap (Priority Queue)Prefix Sum |
| 1274. Number of Ships in a Rectangle | Hard | 64.6% | TopicsArrayDivide and ConquerInteractive |
| 206. Reverse Linked List | Easy | 64.2% | TopicsLinked ListRecursion |
| 98. Validate Binary Search Tree | Medium | 63.9% | TopicsTreeDepth-First SearchBinary Search TreeBinary Tree |
| Word Break II | Hard | 63.9% | TopicsArrayHash TableStringDynamic ProgrammingBacktrackingTrieMemoization |
| 34. Find First and Last Position of Element in Sorted Array | Medium | 63.5% | TopicsArrayBinary Search |
| 118. Pascal's Triangle | Easy | 63.5% | TopicsArrayDynamic Programming |
| 125. Valid Palindrome | Easy | 63.5% | TopicsTwo PointersString |
| Rotate Array | Medium | 63.5% | TopicsArrayMathTwo Pointers |
