Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 691 | House Robber IV | Medium | ArrayBinary SearchDynamic Programming |
| 692 | How Many Apples Can You Put into the Basket | Easy | ArrayGreedySorting |
| 693 | How Many Numbers Are Smaller Than the Current Number | Easy | ArrayHash TableSorting |
| 694 | Identify the Largest Outlier in an Array | Medium | ArrayHash TableCounting |
| 695 | Image Overlap | Medium | ArrayMatrix |
| 696 | Image Smoother | Easy | ArrayMatrix |
| 697 | Implement Router | Medium | ArrayHash TableBinary Search |
| 698 | Increasing Triplet Subsequence | Medium | ArrayGreedy |
| 699 | Increment Submatrices by One | Medium | ArrayMatrixPrefix Sum |
| 700 | Index Pairs of a String | Easy | ArrayStringTrie |
| 701 | Insert Delete GetRandom O(1) | Medium | ArrayHash TableMath |
| 702 | Insert Delete GetRandom O(1) - Duplicates allowed | Hard | ArrayHash TableMath |
| 703 | Insert Interval | Medium | Array |
| 704 | Intersection of Multiple Arrays | Easy | ArrayHash TableSorting |
| 705 | Intersection of Three Sorted Arrays | Easy | ArrayHash TableBinary Search |
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