Practice problems across 75+ categories
Practice problems frequently asked at Matrix • 260 problems | 38 Easy | 152 Medium | 68 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 121 | Maximal Rectangle | Hard | ArrayDynamic ProgrammingStack |
| 122 | Maximal Square | Medium | ArrayDynamic ProgrammingMatrix |
| 123 | Maximum Amount of Money Robot Can Earn | Medium | ArrayDynamic ProgrammingMatrix |
| 124 | Maximum Difference Score in a Grid | Medium | ArrayDynamic ProgrammingMatrix |
| 125 | Maximum Matrix Sum | Medium | ArrayGreedyMatrix |
| 126 | Maximum Non Negative Product in a Matrix | Medium | ArrayDynamic ProgrammingMatrix |
| 127 | Maximum Number of Accepted Invitations | Medium | ArrayDepth-First SearchGraph |
| 128 | Maximum Number of Fish in a Grid | Medium | ArrayDepth-First SearchBreadth-First Search |
| 129 | Maximum Number of Moves in a Grid | Medium | ArrayDynamic ProgrammingMatrix |
| 130 | Maximum Number of Points From Grid Queries | Hard | ArrayTwo PointersBreadth-First Search |
| 131 | Maximum Number of Points with Cost | Medium | ArrayDynamic ProgrammingMatrix |
| 132 | Maximum Points Tourist Can Earn | Medium | ArrayDynamic ProgrammingMatrix |
| 133 | Maximum Rows Covered by Columns | Medium | ArrayBacktrackingBit Manipulation |
| 134 | Maximum Score From Grid Operations | Hard | ArrayDynamic ProgrammingMatrix |
| 135 | Maximum Side Length of a Square with Sum Less than or Equal to Threshold | Medium | ArrayBinary SearchMatrix |
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