Practice problems across 75+ categories
Practice problems frequently asked at Math • 596 problems | 150 Easy | 283 Medium | 161 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 481 | Replace Non-Coprime Numbers in Array | Hard | ArrayMathStack |
| 482 | Reverse Integer | Medium | Math |
| 483 | Reverse Subarray To Maximize Array Value | Hard | ArrayMathGreedy |
| 484 | Right Triangles | Medium | ArrayHash TableMath |
| 485 | Robot Bounded In Circle | Medium | MathStringSimulation |
| 486 | Roman to Integer | Easy | Hash TableMathString |
| 487 | Rotate Array | Medium | ArrayMathTwo Pointers |
| 488 | Rotate Function | Medium | ArrayMathDynamic Programming |
| 489 | Rotate Image | Medium | ArrayMathMatrix |
| 490 | Rotated Digits | Medium | MathDynamic Programming |
| 491 | Self Crossing | Hard | ArrayMathGeometry |
| 492 | Self Dividing Numbers | Easy | Math |
| 493 | Sell Diminishing-Valued Colored Balls | Medium | ArrayMathBinary Search |
| 494 | Shuffle an Array | Medium | ArrayMathDesign |
| 495 | Sign of the Product of an Array | Easy | ArrayMath |
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