Question

经典数独
sudoku

Explanation:

Answer:

6 9 1 5 3 8 4 7 2
7 8 5 1 4 2 6 3 9
4 3 2 9 6 7 1 8 5
1 4 7 8 6 5 9 2 3
8 7 6 3 2 9 4 5 1
3 2 9 7 5 1 8 6 4
9 6 4 2 7 3 5 1 8
5 1 8 6 1 4 3 9 7
2 5 3 4 9 6 7 4 8