Practice problems across 75+ categories
Practice problems frequently asked at Backtracking • 109 problems | 3 Easy | 73 Medium | 32 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 61 | Minimum Number of Lines to Cover Points | Medium | ArrayHash TableMath |
| 62 | Minimum Number of Work Sessions to Finish the Tasks | Medium | ArrayDynamic ProgrammingBacktracking |
| 63 | Minimum Time to Break Locks I | Medium | ArrayDynamic ProgrammingBacktracking |
| 64 | Minimum Unique Word Abbreviation | Hard | ArrayStringBacktracking |
| 65 | N-Queens | Hard | ArrayBacktracking |
| 66 | N-Queens II | Hard | Backtracking |
| 67 | Next Closest Time | Medium | Hash TableStringBacktracking |
| 68 | Next Greater Numerically Balanced Number | Medium | Hash TableMathBacktracking |
| 69 | Non-decreasing Subsequences | Medium | ArrayHash TableBacktracking |
| 70 | Number of Self-Divisible Permutations | Medium | ArrayMathDynamic Programming |
| 71 | Number of Squareful Arrays | Hard | ArrayHash TableMath |
| 72 | Number of Valid Move Combinations On Chessboard | Hard | ArrayStringBacktracking |
| 73 | Numbers With Same Consecutive Differences | Medium | BacktrackingBreadth-First Search |
| 74 | Optimal Account Balancing | Hard | ArrayDynamic ProgrammingBacktracking |
| 75 | Palindrome Partitioning | Medium | StringDynamic ProgrammingBacktracking |
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