Practice problems across 75+ categories
Practice problems frequently asked at Matrix • 260 problems | 38 Easy | 152 Medium | 68 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 46 | Design Tic-Tac-Toe | Medium | ArrayHash TableDesign |
| 47 | Detect Cycles in 2D Grid | Medium | ArrayDepth-First SearchBreadth-First Search |
| 48 | Determine Whether Matrix Can Be Obtained By Rotation | Easy | ArrayMatrix |
| 49 | Diagonal Traverse | Medium | ArrayMatrixSimulation |
| 50 | Difference Between Ones and Zeros in Row and Column | Medium | ArrayMatrixSimulation |
| 51 | Difference of Number of Distinct Values on Diagonals | Medium | ArrayHash TableMatrix |
| 52 | Disconnect Path in a Binary Matrix by at Most One Flip | Medium | ArrayDynamic ProgrammingDepth-First Search |
| 53 | Dungeon Game | Hard | ArrayDynamic ProgrammingMatrix |
| 54 | Equal Row and Column Pairs | Medium | ArrayHash TableMatrix |
| 55 | Equal Sum Grid Partition I | Medium | ArrayMatrixEnumeration |
| 56 | Equal Sum Grid Partition II | Hard | ArrayHash TableMatrix |
| 57 | Escape the Spreading Fire | Hard | ArrayBinary SearchBreadth-First Search |
| 58 | Fill a Special Grid | Medium | ArrayDivide and ConquerMatrix |
| 59 | Find a Good Subset of the Matrix | Hard | ArrayHash TableBit Manipulation |
| 60 | Find a Peak Element II | Medium | ArrayBinary SearchMatrix |
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