Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2416 | Robot Bounded In Circle | Medium | MathStringSimulation |
| 2417 | Robot Collisions | Hard | ArrayStackSorting |
| 2418 | Robot Return to Origin | Easy | StringSimulation |
| 2419 | Robot Room Cleaner | Hard | BacktrackingInteractive |
| 2420 | Rolling Average Steps | Medium | Database |
| 2421 | Roman to Integer | Easy | Hash TableMathString |
| 2422 | Root Equals Sum of Children | Easy | TreeBinary Tree |
| 2423 | Rotate Array | Medium | ArrayMathTwo Pointers |
| 2424 | Rotate Function | Medium | ArrayMathDynamic Programming |
| 2425 | Rotate Image | Medium | ArrayMathMatrix |
| 2426 | Rotate List | Medium | Linked ListTwo Pointers |
| 2427 | Rotate String | Easy | StringString Matching |
| 2428 | Rotting Oranges | Medium | ArrayBreadth-First SearchMatrix |
| 2429 | Row With Maximum Ones | Easy | ArrayMatrix |
| 2430 | Running Sum of 1d Array | Easy | ArrayPrefix Sum |
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