0 3 0 2 7 0 4 6 1
4 5 0 0 0 0 7 0 0
2 0 0 0 0 0 0 8 0
0 0 0 0 5 6 2 1 0
0 0 8 9 0 2 5 0 0
0 2 5 7 1 0 0 0 0
0 1 0 0 0 0 0 0 4
0 0 7 0 0 0 0 5 6
6 8 2 0 9 4 0 3 0
8 3 9 2 7 5 4 6 1
4 5 6 8 3 1 7 9 2
2 7 1 4 6 9 3 8 5
7 9 4 3 5 6 2 1 8
1 6 8 9 4 2 5 7 3
3 2 5 7 1 8 6 4 9
5 1 3 6 8 7 9 2 4
9 4 7 1 2 3 8 5 6
6 8 2 5 9 4 1 3 7
int main(void)
{
int i, j;
int sudoku[9][9];
for (i=0; i<9; i++)
for (j=0; j<9; j++)
cin >> sudoku[i][j];
try_number(0, sudoku);
return 0;
}