Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2311 | Range Sum Query 2D - Mutable | Medium | ArrayDesignBinary Indexed Tree |
| 2312 | Range Sum Query - Immutable | Easy | ArrayDesignPrefix Sum |
| 2313 | Range Sum Query - Mutable | Easy | ArrayDivide and ConquerDesign |
| 2314 | Rank Teams by Votes | Medium | ArrayHash TableString |
| 2315 | Rank Transform of a Matrix | Hard | ArrayUnion FindGraph |
| 2316 | Rank Transform of an Array | Easy | ArrayHash TableSorting |
| 2317 | Ransom Note | Easy | Hash TableStringCounting |
| 2318 | Reach a Number | Medium | MathBinary Search |
| 2319 | Reach End of Array With Max Score | Medium | ArrayGreedy |
| 2320 | Reachable Nodes With Restrictions | Medium | ArrayHash TableTree |
| 2321 | Reaching Points | Hard | Math |
| 2322 | Read N Characters Given read4 II - Call Multiple Times | Hard | ArraySimulationInteractive |
| 2323 | Rearrange Array Elements by Sign | Medium | ArrayTwo PointersSimulation |
| 2324 | Rearrange Array to Maximize Prefix Score | Medium | ArrayGreedySorting |
| 2325 | Rearrange Characters to Make Target String | Easy | Hash TableStringCounting |
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