Practice problems across 75+ categories
Practice problems frequently asked at Matrix • 260 problems | 38 Easy | 152 Medium | 68 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 91 | Image Smoother | Easy | ArrayMatrix |
| 92 | Increment Submatrices by One | Medium | ArrayMatrixPrefix Sum |
| 93 | Island Perimeter | Easy | ArrayDepth-First SearchBreadth-First Search |
| 94 | K Highest Ranked Items Within a Price Range | Medium | ArrayBreadth-First SearchSorting |
| 95 | Kth Smallest Element in a Sorted Matrix | Medium | ArrayBinary SearchSorting |
| 96 | Largest 1-Bordered Square | Medium | ArrayDynamic ProgrammingMatrix |
| 97 | Largest Local Values in a Matrix | Easy | ArrayMatrix |
| 98 | Largest Magic Square | Medium | ArrayMatrixPrefix Sum |
| 99 | Largest Submatrix With Rearrangements | Medium | ArrayGreedySorting |
| 100 | Last Day Where You Can Still Cross | Hard | ArrayBinary SearchDepth-First Search |
| 101 | Leftmost Column with at Least a One | Medium | ArrayBinary SearchMatrix |
| 102 | Length of Longest V-Shaped Diagonal Segment | Hard | ArrayDynamic ProgrammingMemoization |
| 103 | Lonely Pixel I | Medium | ArrayHash TableMatrix |
| 104 | Lonely Pixel II | Medium | ArrayHash TableMatrix |
| 105 | Longest Increasing Path in a Matrix | Hard | ArrayDynamic ProgrammingDepth-First Search |
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