Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1831 | Subsets | Medium | ArrayBacktrackingBit Manipulation |
| 1832 | Subsets II | Medium | ArrayBacktrackingBit Manipulation |
| 1833 | Substring With Largest Variance | Hard | ArrayDynamic Programming |
| 1834 | Substring XOR Queries | Medium | ArrayHash TableString |
| 1835 | Subtree Inversion Sum | Hard | ArrayDynamic ProgrammingTree |
| 1836 | Successful Pairs of Spells and Potions | Medium | ArrayTwo PointersBinary Search |
| 1837 | Sudoku Solver | Hard | ArrayHash TableBacktracking |
| 1838 | Suffix Array Builder | Hard | Advanced DSStringArray |
| 1839 | Sum in a Matrix | Medium | ArraySortingHeap (Priority Queue) |
| 1840 | Sum of Absolute Differences in a Sorted Array | Medium | ArrayMathPrefix Sum |
| 1841 | Sum of All Odd Length Subarrays | Easy | ArrayMathPrefix Sum |
| 1842 | Sum of All Subset XOR Totals | Easy | ArrayMathBacktracking |
| 1843 | Sum of Beauty in the Array | Medium | Array |
| 1844 | Sum of Consecutive Subarrays | Medium | ArrayTwo PointersDynamic Programming |
| 1845 | Sum of Consecutive Subsequences | Hard | ArrayHash TableDynamic Programming |
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