| # | User | Rating |
|---|---|---|
| 1 | tourist | 4009 |
| 2 | jiangly | 3821 |
| 3 | Benq | 3736 |
| 4 | Radewoosh | 3631 |
| 5 | jqdai0815 | 3620 |
| 6 | orzdevinwang | 3529 |
| 7 | ecnerwala | 3446 |
| 8 | Um_nik | 3396 |
| 9 | ksun48 | 3388 |
| 10 | gamegame | 3386 |
| # | User | Contrib. |
|---|---|---|
| 1 | cry | 164 |
| 1 | maomao90 | 164 |
| 3 | Um_nik | 163 |
| 4 | atcoder_official | 161 |
| 5 | -is-this-fft- | 158 |
| 6 | awoo | 157 |
| 7 | adamant | 156 |
| 8 | TheScrasse | 154 |
| 8 | nor | 154 |
| 10 | Dominater069 | 153 |
HELP — LightOJ 1397(Sudoku Solver),backtracking with pruning
Problem Link: Sudoku Solver
My code: link
Pretty straightforward problem. I tried sorting the blank points on the basis of options for a point. I also tried with simple backtracking. In both cases I got TLE.
What am I missing here?
Also, is there any way to use bits to mask which number is possible for a place(row/column/box)?
