Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2506 | Shortest Way to Form String | Medium | Two PointersStringBinary Search |
| 2507 | Shortest Word Distance II | Medium | ArrayHash TableTwo Pointers |
| 2508 | Shortest Word Distance III | Easy | ArrayString |
| 2509 | Shuffle String | Easy | ArrayString |
| 2510 | Shuffle the Array | Easy | Array |
| 2511 | Sign of the Product of an Array | Easy | ArrayMath |
| 2512 | Similar RGB Color | Easy | MathStringEnumeration |
| 2513 | Similar String Groups | Hard | ArrayHash TableString |
| 2514 | Simple Bank System | Medium | ArrayHash TableDesign |
| 2515 | Simplified Fractions | Medium | MathStringNumber Theory |
| 2516 | Single Element in a Sorted Array | Medium | ArrayBinary Search |
| 2517 | Single Number III | Medium | ArrayBit Manipulation |
| 2518 | Single-Threaded CPU | Medium | ArraySortingHeap (Priority Queue) |
| 2519 | Sleep | Easy | JavaScript |
| 2520 | Sliding Puzzle | Hard | ArrayDynamic ProgrammingBacktracking |
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