Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 496 | Find Common Elements Between Two Arrays | Easy | ArrayHash Table |
| 497 | Find Duplicate File in System | Medium | ArrayHash TableString |
| 498 | Find First and Last Position of Element in Sorted Array | Medium | ArrayBinary Search |
| 499 | Find First Palindromic String in the Array | Easy | ArrayTwo PointersString |
| 500 | Find Good Days to Rob the Bank | Medium | ArrayDynamic ProgrammingPrefix Sum |
| 501 | Find Greatest Common Divisor of Array | Easy | ArrayMathNumber Theory |
| 502 | Find if Array Can Be Sorted | Medium | ArrayBit ManipulationSorting |
| 503 | Find if Digit Game Can Be Won | Easy | ArrayMath |
| 504 | Find in Mountain Array | Hard | ArrayBinary SearchInteractive |
| 505 | Find Indices of Stable Mountains | Easy | Array |
| 506 | Find Indices With Index and Value Difference I | Easy | ArrayTwo Pointers |
| 507 | Find Indices With Index and Value Difference II | Medium | ArrayTwo Pointers |
| 508 | Find K Closest Elements | Medium | ArrayTwo PointersBinary Search |
| 509 | Find K Pairs with Smallest Sums | Medium | ArrayHeap (Priority Queue) |
| 510 | Find K-th Smallest Pair Distance | Hard | ArrayTwo PointersBinary Search |
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