Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2596 | Permutation in String | Medium | Hash TableTwo PointersString |
| 2597 | Permutation Sequence | Hard | MathRecursion |
| 2598 | Permutations | Medium | ArrayBacktracking |
| 2599 | Permutations II | Medium | ArrayBacktrackingSorting |
| 2600 | Permutations III | Medium | ArrayBacktracking |
| 2601 | Phone Number Prefix | Easy | ArrayStringTrie |
| 2602 | Pizza With 3n Slices | Hard | ArrayDynamic ProgrammingGreedy |
| 2603 | Plates Between Candles | Medium | ArrayStringBinary Search |
| 2604 | Plus One | Easy | ArrayMath |
| 2605 | Plus One Linked List | Medium | Linked ListMath |
| 2606 | Points That Intersect With Cars | Easy | ArrayHash TablePrefix Sum |
| 2607 | Poor Pigs | Hard | MathDynamic ProgrammingCombinatorics |
| 2608 | Populating Next Right Pointers in Each Node | Medium | Linked ListTreeDepth-First Search |
| 2609 | Populating Next Right Pointers in Each Node II | Medium | Linked ListTreeDepth-First Search |
| 2610 | Positions of Large Groups | Easy | String |
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