Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1156 | Integer to Roman | Medium | Hash TableMathString |
| 1157 | Interleaving String | Medium | StringDynamic Programming |
| 1158 | Intersection of Multiple Arrays | Easy | ArrayHash TableSorting |
| 1159 | Intersection of Two Arrays | Easy | ArrayHash TableTwo Pointers |
| 1160 | Interval Cancellation | Easy | JavaScript |
| 1161 | Interval List Intersections | Medium | ArrayTwo PointersLine Sweep |
| 1162 | Intervals Between Identical Elements | Medium | ArrayHash TablePrefix Sum |
| 1163 | Invalid Transactions | Medium | ArrayHash TableString |
| 1164 | Invalid Tweets | Easy | Database |
| 1165 | Inverse Coin Change | Medium | ArrayDynamic Programming |
| 1166 | Inversion of Object | Easy | Database |
| 1167 | Investments in 2016 | Medium | Database |
| 1168 | IP to CIDR | Medium | StringBit Manipulation |
| 1169 | IPO | Hard | ArrayGreedySorting |
| 1170 | Is Array a Preorder of Some Binary Tree | Medium | StackTreeDepth-First Search |
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