Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 841 | Make the Prefix Sum Non-negative | Medium | ArrayGreedyHeap (Priority Queue) |
| 842 | Make the XOR of All Segments Equal to Zero | Hard | ArrayDynamic ProgrammingBit Manipulation |
| 843 | Make Two Arrays Equal by Reversing Subarrays | Easy | ArrayHash TableSorting |
| 844 | Making A Large Island | Hard | ArrayDepth-First SearchBreadth-First Search |
| 845 | Making File Names Unique | Medium | ArrayHash TableString |
| 846 | Map of Highest Peak | Medium | ArrayBreadth-First SearchMatrix |
| 847 | Mark Elements on Array by Performing Queries | Medium | ArrayHash TableSorting |
| 848 | Match Alphanumerical Pattern in Matrix I | Medium | ArrayHash TableString |
| 849 | Match Substring After Replacement | Hard | ArrayHash TableString |
| 850 | Matchsticks to Square | Medium | ArrayDynamic ProgrammingBacktracking |
| 851 | Matrix Block Sum | Medium | ArrayMatrixPrefix Sum |
| 852 | Matrix Cells in Distance Order | Easy | ArrayMathGeometry |
| 853 | Matrix Diagonal Sum | Easy | ArrayMatrix |
| 854 | Matrix Similarity After Cyclic Shifts | Easy | ArrayMathMatrix |
| 855 | Max Area of Island | Medium | ArrayDepth-First SearchBreadth-First Search |
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