Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2161 | Numbers With Same Consecutive Differences | Medium | BacktrackingBreadth-First Search |
| 2162 | Occurrences After Bigram | Easy | String |
| 2163 | Odd Even Jump | Hard | ArrayDynamic ProgrammingStack |
| 2164 | Odd Even Linked List | Medium | Linked List |
| 2165 | Odd String Difference | Easy | ArrayHash TableString |
| 2166 | Once Twice | Medium | ArrayBit Manipulation |
| 2167 | Ones and Zeroes | Medium | ArrayStringDynamic Programming |
| 2168 | Online Election | Medium | ArrayHash TableBinary Search |
| 2169 | Online Majority Element In Subarray | Hard | ArrayBinary SearchDesign |
| 2170 | Open the Lock | Medium | ArrayHash TableString |
| 2171 | Operations on Tree | Medium | ArrayHash TableTree |
| 2172 | Optimal Account Balancing | Hard | ArrayDynamic ProgrammingBacktracking |
| 2173 | Optimal Partition of String | Medium | Hash TableStringGreedy |
| 2174 | Order Two Columns Independently | Medium | Database |
| 2175 | Orderly Queue | Hard | MathStringSorting |
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