4 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 2240. Number of Ways to Buy Pens and Pencils | Medium | 100% | TopicsMathEnumeration |
| 127. Word Ladder | Hard | 89.7% | TopicsHash TableStringBreadth-First SearchBidirectional Search |
| Design Hit Counter | Medium | 78.6% | TopicsArrayBinary SearchDesignQueueData Stream |
| Logger Rate Limiter | Easy | 69.7% | TopicsHash TableDesignData Stream |
