Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1576 | Range Sum Query - Mutable | Easy | ArrayDivide and ConquerDesign |
| 1577 | Range XOR Queries with Subarray Reversals | Hard | ArrayTreeBinary Tree |
| 1578 | Rank Teams by Votes | Medium | ArrayHash TableString |
| 1579 | Rank Transform of a Matrix | Hard | ArrayUnion FindGraph |
| 1580 | Rank Transform of an Array | Easy | ArrayHash TableSorting |
| 1581 | Reach End of Array With Max Score | Medium | ArrayGreedy |
| 1582 | Reachable Nodes With Restrictions | Medium | ArrayHash TableTree |
| 1583 | Read N Characters Given Read4 | Easy | ArraySimulationInteractive |
| 1584 | Read N Characters Given read4 II - Call Multiple Times | Hard | ArraySimulationInteractive |
| 1585 | Rearrange Array Elements by Sign | Medium | ArrayTwo PointersSimulation |
| 1586 | Rearrange Array to Maximize Prefix Score | Medium | ArrayGreedySorting |
| 1587 | Rearranging Fruits | Hard | ArrayHash TableGreedy |
| 1588 | Reconstruct a 2-Row Binary Matrix | Medium | ArrayGreedyMatrix |
| 1589 | Recover the Original Array | Hard | ArrayHash TableTwo Pointers |
| 1590 | Rectangle Area II | Hard | ArraySegment TreeLine Sweep |
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