Meta
1396 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| H-Index | Medium | 26% | TopicsArraySortingCounting Sort |
| H-Index II | Medium | 26% | TopicsArrayBinary Search |
| 367. Valid Perfect Square | Easy | 26% | TopicsMathBinary Search |
| Convert a Number to Hexadecimal | Easy | 26% | TopicsMathStringBit Manipulation |
| Total Hamming Distance | Medium | 26% | TopicsArrayMathBit Manipulation |
| Longest Palindromic Subsequence | Medium | 26% | TopicsStringDynamic Programming |
| Brick Wall | Medium | 26% | TopicsArrayHash Table |
| Friend Requests I: Overall Acceptance Rate | Easy | 26% | TopicsDatabase |
| Triangle Judgement | Easy | 26% | TopicsDatabase |
| 637. Average of Levels in Binary Tree | Easy | 26% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| Design Search Autocomplete System | Hard | 26% | TopicsStringDepth-First SearchDesignTrieSortingHeap (Priority Queue)Data Stream |
| Number of Longest Increasing Subsequence | Medium | 26% | TopicsArrayDynamic ProgrammingBinary Indexed TreeSegment TreeLongest Increasing Subsequence |
| 733. Flood Fill | Easy | 26% | TopicsArrayDepth-First SearchBreadth-First SearchMatrix |
| 752. Open the Lock | Medium | 26% | TopicsArrayHash TableStringBreadth-First SearchBidirectional Search |
| 764. Largest Plus Sign | Medium | 26% | TopicsArrayDynamic Programming |
| 622. Design Circular Queue | Medium | 26% | TopicsArrayLinked ListDesignQueue |
| 930. Binary Subarrays With Sum | Medium | 26% | TopicsArrayHash TableSliding WindowPrefix Sum |
| 1213. Intersection of Three Sorted Arrays | Easy | 26% | TopicsArrayHash TableBinary SearchCounting |
| Project Employees I | Easy | 26% | TopicsDatabase |
| 1110. Delete Nodes And Return Forest | Medium | 26% | TopicsArrayHash TableTreeDepth-First SearchBinary Tree |
| 1361. Validate Binary Tree Nodes | Medium | 26% | TopicsTreeDepth-First SearchBreadth-First SearchUnion-FindGraph TheoryBinary Tree |
| 1207. Unique Number of Occurrences | Easy | 26% | TopicsArrayHash Table |
| 1239. Maximum Length of a Concatenated String with Unique Characters | Medium | 26% | TopicsArrayStringBacktrackingBit Manipulation |
| Web Crawler Multithreaded | Medium | 26% | TopicsDepth-First SearchBreadth-First SearchConcurrency |
| 2303. Calculate Amount Paid in Taxes | Easy | 26% | TopicsArraySimulation |
