Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1621 | Restore the Array From Adjacent Pairs | Medium | ArrayHash TableDepth-First Search |
| 1622 | Reveal Cards In Increasing Order | Medium | ArrayQueueSorting |
| 1623 | Reverse Pairs | Hard | ArrayBinary SearchDivide and Conquer |
| 1624 | Reverse Subarray To Maximize Array Value | Hard | ArrayMathGreedy |
| 1625 | Reward Top K Students | Medium | ArrayHash TableString |
| 1626 | Richest Customer Wealth | Easy | ArrayMatrix |
| 1627 | Right Triangles | Medium | ArrayHash TableMath |
| 1628 | RLE Iterator | Medium | ArrayDesignCounting |
| 1629 | Robot Collisions | Hard | ArrayStackSorting |
| 1630 | Rotate Array | Medium | ArrayMathTwo Pointers |
| 1631 | Rotate Function | Medium | ArrayMathDynamic Programming |
| 1632 | Rotate Image | Medium | ArrayMathMatrix |
| 1633 | Rotating the Box | Medium | ArrayTwo PointersMatrix |
| 1634 | Rotting Oranges | Medium | ArrayBreadth-First SearchMatrix |
| 1635 | Row With Maximum Ones | Easy | ArrayMatrix |
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