Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1816 | Sum of Prefix Scores of Strings | Hard | ArrayStringTrie |
| 1817 | Sum of Remoteness of All Cells | Medium | ArrayHash TableDepth-First Search |
| 1818 | Sum Of Special Evenly-Spaced Elements In Array | Hard | ArrayDynamic Programming |
| 1819 | Sum of Squares of Special Elements | Easy | ArrayEnumeration |
| 1820 | Sum of Subarray Minimums | Medium | ArrayDynamic ProgrammingStack |
| 1821 | Sum of Subarray Ranges | Medium | ArrayStackMonotonic Stack |
| 1822 | Sum of Subsequence Widths | Hard | ArrayMathSorting |
| 1823 | Sum of Total Strength of Wizards | Hard | ArrayStackMonotonic Stack |
| 1824 | Sum of Unique Elements | Easy | ArrayHash TableCounting |
| 1825 | Sum of Values at Indices With K Set Bits | Easy | ArrayBit Manipulation |
| 1826 | Sum of Variable Length Subarrays | Easy | ArrayPrefix Sum |
| 1827 | Summary Ranges | Easy | Array |
| 1828 | Super Ugly Number | Medium | ArrayMathDynamic Programming |
| 1829 | Super Washing Machines | Hard | ArrayGreedy |
| 1830 | Surface Area of 3D Shapes | Easy | ArrayMathGeometry |
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