Practice problems across 75+ categories
Practice problems frequently asked at Hash Table • 719 problems | 168 Easy | 418 Medium | 127 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 586 | Reconstruct Original Digits from English | Medium | Hash TableMathString |
| 587 | Recover the Original Array | Hard | ArrayHash TableTwo Pointers |
| 588 | Redistribute Characters to Make All Strings Equal | Easy | Hash TableStringCounting |
| 589 | Reduce Array Size to The Half | Medium | ArrayHash TableGreedy |
| 590 | Regions Cut By Slashes | Medium | ArrayHash TableDepth-First Search |
| 591 | Relative Sort Array | Easy | ArrayHash TableSorting |
| 592 | Relocate Marbles | Medium | ArrayHash TableSorting |
| 593 | Remove Duplicates From an Unsorted Linked List | Medium | Hash TableLinked List |
| 594 | Remove Letter To Equalize Frequency | Easy | Hash TableStringCounting |
| 595 | Remove Zero Sum Consecutive Nodes from Linked List | Medium | Hash TableLinked List |
| 596 | Reordered Power of 2 | Medium | Hash TableMathSorting |
| 597 | Reorganize String | Medium | Hash TableStringGreedy |
| 598 | Repeated DNA Sequences | Medium | Hash TableStringBit Manipulation |
| 599 | Replace Elements in an Array | Medium | ArrayHash TableSimulation |
| 600 | Replace Question Marks in String to Minimize Its Value | Medium | Hash TableStringGreedy |
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