Practice problems across 75+ categories
Practice problems frequently asked at Backtracking • 109 problems | 3 Easy | 73 Medium | 32 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1 | 24 Game | Hard | ArrayMathBacktracking |
| 2 | Additive Number | Medium | StringBacktracking |
| 3 | All Paths From Source to Target | Medium | BacktrackingDepth-First SearchBreadth-First Search |
| 4 | Ambiguous Coordinates | Medium | StringBacktrackingEnumeration |
| 5 | Android Unlock Patterns | Medium | Dynamic ProgrammingBacktrackingBit Manipulation |
| 6 | Beautiful Arrangement | Medium | ArrayDynamic ProgrammingBacktracking |
| 7 | Binary Tree Paths | Easy | StringBacktrackingTree |
| 8 | Binary Watch | Easy | BacktrackingBit Manipulation |
| 9 | Brace Expansion | Unknown | StringBacktrackingStack |
| 10 | Brace Expansion II | Hard | Hash TableStringBacktracking |
| 11 | Campus Bikes II | Medium | ArrayDynamic ProgrammingBacktracking |
| 12 | Circular Permutation in Binary Representation | Medium | MathBacktrackingBit Manipulation |
| 13 | Closest Dessert Cost | Medium | ArrayDynamic ProgrammingBacktracking |
| 14 | Combination Sum | Medium | ArrayBacktracking |
| 15 | Combination Sum II | Medium | ArrayBacktracking |
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