Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 811 | Find First and Last Position of Element in Sorted Array | Medium | ArrayBinary Search |
| 812 | Find First Palindromic String in the Array | Easy | ArrayTwo PointersString |
| 813 | Find Followers Count | Easy | Database |
| 814 | Find Good Days to Rob the Bank | Medium | ArrayDynamic ProgrammingPrefix Sum |
| 815 | Find if Array Can Be Sorted | Medium | ArrayBit ManipulationSorting |
| 816 | Find if Digit Game Can Be Won | Easy | ArrayMath |
| 817 | Find if Path Exists in Graph | Easy | Depth-First SearchBreadth-First SearchUnion Find |
| 818 | Find Indices of Stable Mountains | Easy | Array |
| 819 | Find Indices With Index and Value Difference I | Easy | ArrayTwo Pointers |
| 820 | Find Indices With Index and Value Difference II | Medium | ArrayTwo Pointers |
| 821 | Find Interview Candidates | Medium | Database |
| 822 | Find Invalid IP Addresses | Hard | Database |
| 823 | Find K Closest Elements | Medium | ArrayTwo PointersBinary Search |
| 824 | Find K-Length Substrings With No Repeated Characters | Medium | Hash TableStringSliding Window |
| 825 | Find K Pairs with Smallest Sums | Medium | ArrayHeap (Priority Queue) |
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