Practice problems across 75+ categories
Practice problems frequently asked at Hash Table • 719 problems | 168 Easy | 418 Medium | 127 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 571 | Powerful Integers | Medium | Hash TableMathEnumeration |
| 572 | Prefix and Suffix Search | Hard | ArrayHash TableString |
| 573 | Prison Cells After N Days | Medium | ArrayHash TableMath |
| 574 | Properties Graph | Medium | ArrayHash TableDepth-First Search |
| 575 | Pyramid Transition Matrix | Medium | Hash TableStringBacktracking |
| 576 | Rabbits in Forest | Medium | ArrayHash TableMath |
| 577 | Random Flip Matrix | Medium | Hash TableMathReservoir Sampling |
| 578 | Random Pick Index | Medium | Hash TableMathReservoir Sampling |
| 579 | Random Pick with Blacklist | Hard | ArrayHash TableMath |
| 580 | Range Frequency Queries | Medium | ArrayHash TableBinary Search |
| 581 | Rank Teams by Votes | Medium | ArrayHash TableString |
| 582 | Rank Transform of an Array | Easy | ArrayHash TableSorting |
| 583 | Ransom Note | Easy | Hash TableStringCounting |
| 584 | Reachable Nodes With Restrictions | Medium | ArrayHash TableTree |
| 585 | Rearrange Characters to Make Target String | Easy | Hash TableStringCounting |
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