Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 826 | Magic Squares In Grid | Medium | ArrayHash TableMath |
| 827 | Magnetic Force Between Two Balls | Medium | ArrayBinary SearchSorting |
| 828 | Majority Element | Easy | ArrayHash TableDivide and Conquer |
| 829 | Majority Element II | Medium | ArrayHash TableSorting |
| 830 | Make a Positive Array | Medium | ArrayGreedyPrefix Sum |
| 831 | Make a Square with the Same Color | Easy | ArrayMatrixEnumeration |
| 832 | Make Array Elements Equal to Zero | Easy | ArraySimulationPrefix Sum |
| 833 | Make Array Empty | Hard | ArrayBinary SearchGreedy |
| 834 | Make Array Non-decreasing | Medium | ArrayStackGreedy |
| 835 | Make Array Strictly Increasing | Hard | ArrayBinary SearchDynamic Programming |
| 836 | Make Array Zero by Subtracting Equal Amounts | Easy | ArrayHash TableGreedy |
| 837 | Make Costs of Paths Equal in a Binary Tree | Medium | ArrayDynamic ProgrammingGreedy |
| 838 | Make K-Subarray Sums Equal | Medium | ArrayMathGreedy |
| 839 | Make Lexicographically Smallest Array by Swapping Elements | Medium | ArrayUnion FindSorting |
| 840 | Make Sum Divisible by P | Medium | ArrayHash TablePrefix Sum |
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