Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1861 | Sum of Subarray Minimums | Medium | ArrayDynamic ProgrammingStack |
| 1862 | Sum of Subarray Ranges | Medium | ArrayStackMonotonic Stack |
| 1863 | Sum of Subsequence Widths | Hard | ArrayMathSorting |
| 1864 | Sum of Total Strength of Wizards | Hard | ArrayStackMonotonic Stack |
| 1865 | Sum of Unique Elements | Easy | ArrayHash TableCounting |
| 1866 | Sum of Values at Indices With K Set Bits | Easy | ArrayBit Manipulation |
| 1867 | Sum of Variable Length Subarrays | Easy | ArrayPrefix Sum |
| 1868 | Summary Ranges | Easy | Array |
| 1869 | Super Ugly Number | Medium | ArrayMathDynamic Programming |
| 1870 | Super Washing Machines | Hard | ArrayGreedy |
| 1871 | Surface Area of 3D Shapes | Easy | ArrayMathGeometry |
| 1872 | Surrounded Regions | Medium | ArrayDepth-First SearchBreadth-First Search |
| 1873 | Swim in Rising Water | Hard | ArrayBinary SearchDepth-First Search |
| 1874 | Synonymous Sentences | Medium | ArrayHash TableString |
| 1875 | Take Gifts From the Richest Pile | Easy | ArrayHeap (Priority Queue)Simulation |
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