Practice problems across 75+ categories
Practice problems frequently asked at Backtracking • 109 problems | 3 Easy | 73 Medium | 32 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 106 | Team Formation Splitter | Medium | RecursionBacktrackingArray |
| 107 | The k-th Lexicographical String of All Happy Strings of Length n | Medium | StringBacktracking |
| 108 | The Knight's Tour | Medium | ArrayBacktrackingMatrix |
| 109 | The Number of Beautiful Subsets | Medium | ArrayHash TableMath |
| 110 | Tiling a Rectangle with the Fewest Squares | Hard | Backtracking |
| 111 | Unique Binary Search Trees II | Medium | Dynamic ProgrammingBacktrackingTree |
| 112 | Unique Paths III | Hard | ArrayBacktrackingBit Manipulation |
| 113 | Verbal Arithmetic Puzzle | Hard | ArrayMathString |
| 114 | Word Break II | Hard | ArrayHash TableString |
| 115 | Word Ladder II | Hard | Hash TableStringBacktracking |
| 116 | Word Pattern II | Medium | Hash TableStringBacktracking |
| 117 | Word Search | Medium | ArrayStringBacktracking |
| 118 | Word Search II | Hard | ArrayStringBacktracking |
| 119 | Word Squares | Hard | ArrayStringBacktracking |
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