제출 #177753

4
2 6 4 0
6 5 0 8
0 0 0 0
9 7 9 0

1

0

4
1 3 9 0
1 2 0 1
4 0 2 8
3 0 0 0

2

0

4
2 7 6 4
8 8 1 0
0 8 8 2
6 4 0 0

1

0