19 problems
Backtracking interview problems
19 Backtracking problems, from easy to hard. Each one has an editorial explaining the approach and its complexity, and a visualizer that runs the solution step by step on the example input or your own.
Medium (14)
- 17. Letter Combinations of a Phone NumberMedium
- 22. Generate ParenthesesMedium
- 37. Combination SumMedium
- 38. Combination Sum IIMedium
- 43. PermutationsMedium
- 44. Permutations IIMedium
- 74. CombinationsMedium
- 75. SubsetsMedium
- 76. Word SearchMedium
- 84. Subsets IIMedium
- 101. Path Sum IIMedium
- 119. Palindrome PartitioningMedium
- 172. Combination Sum IIIMedium
- 207. Word Pattern IIMedium