Practice problems across 75+ categories
Practice problems frequently asked at Matrix • 260 problems | 38 Easy | 152 Medium | 68 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 106 | Magic Squares In Grid | Medium | ArrayHash TableMath |
| 107 | Make a Square with the Same Color | Easy | ArrayMatrixEnumeration |
| 108 | Making A Large Island | Hard | ArrayDepth-First SearchBreadth-First Search |
| 109 | Map of Highest Peak | Medium | ArrayBreadth-First SearchMatrix |
| 110 | Match Alphanumerical Pattern in Matrix I | Medium | ArrayHash TableString |
| 111 | Matrix Block Sum | Medium | ArrayMatrixPrefix Sum |
| 112 | Matrix Cells in Distance Order | Easy | ArrayMathGeometry |
| 113 | Matrix Diagonal Sum | Easy | ArrayMatrix |
| 114 | Matrix Similarity After Cyclic Shifts | Easy | ArrayMathMatrix |
| 115 | Max Area of Island | Medium | ArrayDepth-First SearchBreadth-First Search |
| 116 | Max Increase to Keep City Skyline | Medium | ArrayGreedyMatrix |
| 117 | Max Sum of Rectangle No Larger Than K | Hard | ArrayBinary SearchMatrix |
| 118 | Maximal Rectangle | Hard | ArrayDynamic ProgrammingStack |
| 119 | Maximal Square | Medium | ArrayDynamic ProgrammingMatrix |
| 120 | Maximum Amount of Money Robot Can Earn | Medium | ArrayDynamic ProgrammingMatrix |
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