Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 676 | H-Index | Medium | ArraySortingCounting Sort |
| 677 | H-Index II | Medium | ArrayBinary Search |
| 678 | Hand of Straights | Medium | ArrayHash TableGreedy |
| 679 | Handling Sum Queries After Update | Hard | ArraySegment Tree |
| 680 | Happy Students | Medium | ArraySortingEnumeration |
| 681 | Heaters | Medium | ArrayTwo PointersBinary Search |
| 682 | Height Checker | Easy | ArraySortingCounting Sort |
| 683 | Height of Binary Tree After Subtree Removal Queries | Hard | ArrayTreeDepth-First Search |
| 684 | High-Access Employees | Medium | ArrayHash TableString |
| 685 | High Five | Easy | ArrayHash TableSorting |
| 686 | House Robber | Medium | ArrayDynamic Programming |
| 687 | House Robber II | Medium | ArrayDynamic Programming |
| 688 | House Robber IV | Medium | ArrayBinary SearchDynamic Programming |
| 689 | How Many Apples Can You Put into the Basket | Easy | ArrayGreedySorting |
| 690 | How Many Numbers Are Smaller Than the Current Number | Easy | ArrayHash TableSorting |
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