Practice problems across 75+ categories
Practice problems frequently asked at Matrix • 260 problems | 38 Easy | 152 Medium | 68 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 166 | Minimum Operations to Make Columns Strictly Increasing | Easy | ArrayGreedyMatrix |
| 167 | Minimum Operations to Remove Adjacent Ones in Matrix | Hard | ArrayGraphMatrix |
| 168 | Minimum Operations to Write the Letter Y on a Grid | Medium | ArrayHash TableMatrix |
| 169 | Minimum Path Cost in a Grid | Medium | ArrayDynamic ProgrammingMatrix |
| 170 | Minimum Path Cost in a Hidden Grid | Medium | ArrayDepth-First SearchBreadth-First Search |
| 171 | Minimum Path Sum | Medium | ArrayDynamic ProgrammingMatrix |
| 172 | Minimum Swaps to Arrange a Binary Grid | Medium | ArrayGreedyMatrix |
| 173 | Minimum Time Takes to Reach Destination Without Drowning | Hard | ArrayBreadth-First SearchMatrix |
| 174 | Minimum Time to Visit a Cell In a Grid | Hard | ArrayBreadth-First SearchGraph |
| 175 | Modify the Matrix | Easy | ArrayMatrix |
| 176 | Most Frequent Prime | Medium | ArrayHash TableMath |
| 177 | Nearest Exit from Entrance in Maze | Medium | ArrayBreadth-First SearchMatrix |
| 178 | Number of Closed Islands | Medium | ArrayDepth-First SearchBreadth-First Search |
| 179 | Number Of Corner Rectangles | Medium | ArrayMathDynamic Programming |
| 180 | Number of Enclaves | Medium | ArrayDepth-First SearchBreadth-First Search |
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