OpenAI
18 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 2502. Design Memory Allocator | Medium | 100% | TopicsArrayHash TableDesignSimulation |
| Design SQL | Medium | 96.5% | TopicsArrayHash TableStringDesign |
| Encode and Decode Strings | Medium | 86.7% | TopicsArrayStringDesign |
| 994. Rotting Oranges | Medium | 81.4% | TopicsArrayBreadth-First SearchMatrix |
| 981. Time Based Key-Value Store | Medium | 79.2% | TopicsHash TableStringBinary SearchDesign |
| 751. IP to CIDR | Medium | 76.8% | TopicsStringBit Manipulation |
| Flatten Nested List Iterator | Medium | 74.1% | TopicsStackTreeDepth-First SearchDesignQueueIterator |
| Simplify Path | Medium | 62.7% | TopicsStringStack |
| 2373. Largest Local Values in a Matrix | Easy | 56.9% | TopicsArrayMatrix |
| Design Excel Sum Formula | Hard | 48.7% | TopicsArrayHash TableStringGraph TheoryDesignTopological SortMatrix |
| Asteroid Collision | Medium | 48.7% | TopicsArrayStackSimulation |
| 42. Trapping Rain Water | Hard | 48.7% | TopicsArrayTwo PointersDynamic ProgrammingStackMonotonic Stack |
| 3484. Design Spreadsheet | Medium | 48.7% | TopicsArrayHash TableStringDesignMatrix |
| Design Hit Counter | Medium | 48.7% | TopicsArrayBinary SearchDesignQueueData Stream |
| 1797. Design Authentication Manager | Medium | 48.7% | TopicsHash TableLinked ListDesignDoubly-Linked List |
| 1146. Snapshot Array | Medium | 48.7% | TopicsArrayHash TableBinary SearchDesignPersistent Data Structure |
| 146. LRU Cache | Medium | 48.7% | TopicsHash TableLinked ListDesignDoubly-Linked List |
| 609. Find Duplicate File in System | Medium | 48.7% | TopicsArrayHash TableString |
