Practice problems across 75+ categories
Practice problems frequently asked at Two Pointers • 223 problems | 57 Easy | 134 Medium | 31 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 61 | Find the Lexicographically Largest String From the Box II | Hard | Two PointersString |
| 62 | Find the Lexicographically Smallest Valid Sequence | Medium | Two PointersStringDynamic Programming |
| 63 | Find the Maximum Number of Marked Indices | Medium | ArrayTwo PointersBinary Search |
| 64 | Flatten 2D Vector | Medium | ArrayTwo PointersDesign |
| 65 | Flipping an Image | Easy | ArrayTwo PointersBit Manipulation |
| 66 | Form Array by Concatenating Subarrays of Another Array | Medium | ArrayTwo PointersGreedy |
| 67 | Friends Of Appropriate Ages | Medium | ArrayTwo PointersBinary Search |
| 68 | Get the Maximum Score | Hard | ArrayTwo PointersDynamic Programming |
| 69 | Happy Number | Easy | Hash TableMathTwo Pointers |
| 70 | Heaters | Medium | ArrayTwo PointersBinary Search |
| 71 | Intersection of Two Arrays | Easy | ArrayHash TableTwo Pointers |
| 72 | Intersection of Two Arrays II | Easy | ArrayHash TableTwo Pointers |
| 73 | Intersection of Two Linked Lists | Easy | Hash TableLinked ListTwo Pointers |
| 74 | Interval List Intersections | Medium | ArrayTwo PointersLine Sweep |
| 75 | Is Subsequence | Easy | Two PointersStringDynamic Programming |
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