Day 22 Backtrack IV¶
Python solutions and study notes by Charles.
| Problem / Note | Difficulty |
|---|---|
| 491. Non-decreasing Subsequences | Medium |
| 46. Permutations | Medium |
| 47. Permutations II | Medium |
| 51. N-Queens | Hard |
| 37. Sudoku Solver | Hard |
Python solutions and study notes by Charles.
| Problem / Note | Difficulty |
|---|---|
| 491. Non-decreasing Subsequences | Medium |
| 46. Permutations | Medium |
| 47. Permutations II | Medium |
| 51. N-Queens | Hard |
| 37. Sudoku Solver | Hard |