Practice problems across 75+ categories
Practice problems frequently asked at Backtracking • 109 problems | 3 Easy | 73 Medium | 32 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 61 | Next Greater Numerically Balanced Number | Medium | Hash TableMathBacktracking |
| 62 | Non-decreasing Subsequences | Medium | ArrayHash TableBacktracking |
| 63 | Number of Self-Divisible Permutations | Medium | ArrayMathDynamic Programming |
| 64 | Number of Squareful Arrays | Hard | ArrayHash TableMath |
| 65 | Number of Valid Move Combinations On Chessboard | Hard | ArrayStringBacktracking |
| 66 | Numbers With Same Consecutive Differences | Medium | BacktrackingBreadth-First Search |
| 67 | Optimal Account Balancing | Hard | ArrayDynamic ProgrammingBacktracking |
| 68 | Palindrome Partitioning | Medium | StringDynamic ProgrammingBacktracking |
| 69 | Palindrome Permutation II | Medium | Hash TableStringBacktracking |
| 70 | Partition String Into Minimum Beautiful Substrings | Medium | Hash TableStringDynamic Programming |
| 71 | Partition to K Equal Sum Subsets | Medium | ArrayDynamic ProgrammingBacktracking |
| 72 | Path Sum II | Medium | BacktrackingTreeDepth-First Search |
| 73 | Path with Maximum Gold | Medium | ArrayBacktrackingMatrix |
| 74 | Permutations | Medium | ArrayBacktracking |
| 75 | Permutations II | Medium | ArrayBacktrackingSorting |
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