Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 361 | Design Circular Deque | Medium | ArrayLinked ListDesign |
| 362 | Design Circular Queue | Medium | ArrayLinked ListDesign |
| 363 | Design Compressed String Iterator | Easy | ArrayStringDesign |
| 364 | Design Excel Sum Formula | Unknown | ArrayHash TableString |
| 365 | Design Front Middle Back Queue | Medium | ArrayLinked ListDesign |
| 366 | Design HashMap | Easy | ArrayHash TableLinked List |
| 367 | Design HashSet | Easy | ArrayHash TableLinked List |
| 368 | Design Hit Counter | Medium | ArrayBinary SearchDesign |
| 369 | Design Memory Allocator | Medium | ArrayHash TableDesign |
| 370 | Design Most Recently Used Queue | Medium | ArrayLinked ListDivide and Conquer |
| 371 | Design Movie Rental System | Hard | ArrayHash TableDesign |
| 372 | Design Neighbor Sum Service | Easy | ArrayHash TableDesign |
| 373 | Design Phone Directory | Medium | ArrayHash TableLinked List |
| 374 | Design Snake Game | Medium | ArrayHash TableDesign |
| 375 | Design Spreadsheet | Medium | ArrayHash TableString |
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