Practice problems across 75+ categories
Practice problems frequently asked at Backtracking • 109 problems | 3 Easy | 73 Medium | 32 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 91 | Shopping Offers | Medium | ArrayDynamic ProgrammingBacktracking |
| 92 | Sliding Puzzle | Hard | ArrayDynamic ProgrammingBacktracking |
| 93 | Smallest Divisible Digit Product II | Hard | MathStringBacktracking |
| 94 | Smallest String Starting From Leaf | Medium | StringBacktrackingTree |
| 95 | Split a String Into the Max Number of Unique Substrings | Medium | Hash TableStringBacktracking |
| 96 | Split Array into Fibonacci Sequence | Medium | StringBacktracking |
| 97 | Splitting a String Into Descending Consecutive Values | Medium | StringBacktrackingEnumeration |
| 98 | Stepping Numbers | Medium | MathBacktrackingBreadth-First Search |
| 99 | Stickers to Spell Word | Hard | ArrayHash TableString |
| 100 | Subsets | Medium | ArrayBacktrackingBit Manipulation |
| 101 | Subsets II | Medium | ArrayBacktrackingBit Manipulation |
| 102 | Sudoku Solver | Hard | ArrayHash TableBacktracking |
| 103 | Sum of All Subset XOR Totals | Easy | ArrayMathBacktracking |
| 104 | Synonymous Sentences | Medium | ArrayHash TableString |
| 105 | Target Sum | Medium | ArrayDynamic ProgrammingBacktracking |
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