Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 871 | Mark Elements on Array by Performing Queries | Medium | ArrayHash TableSorting |
| 872 | Match Alphanumerical Pattern in Matrix I | Medium | ArrayHash TableString |
| 873 | Match Substring After Replacement | Hard | ArrayHash TableString |
| 874 | Matchsticks to Square | Medium | ArrayDynamic ProgrammingBacktracking |
| 875 | Matrix Block Sum | Medium | ArrayMatrixPrefix Sum |
| 876 | Matrix Cells in Distance Order | Easy | ArrayMathGeometry |
| 877 | Matrix Diagonal Sum | Easy | ArrayMatrix |
| 878 | Matrix Similarity After Cyclic Shifts | Easy | ArrayMathMatrix |
| 879 | Max Area of Island | Medium | ArrayDepth-First SearchBreadth-First Search |
| 880 | Max Chunks To Make Sorted | Medium | ArrayStackGreedy |
| 881 | Max Chunks To Make Sorted II | Hard | ArrayStackGreedy |
| 882 | Max Consecutive Ones | Easy | Array |
| 883 | Max Consecutive Ones II | Medium | ArrayDynamic ProgrammingSliding Window |
| 884 | Max Consecutive Ones III | Medium | ArrayBinary SearchSliding Window |
| 885 | Max Dot Product of Two Subsequences | Hard | ArrayDynamic Programming |
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