sample_input.txt

3
7
0 0 1 0 0 0 0
0 0 1 0 0 0 0
0 0 0 0 0 1 0
0 0 0 0 0 0 0
1 1 0 1 0 0 0
0 1 0 0 0 0 0
0 0 0 0 0 0 0
9
0 0 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 1
1 0 0 0 0 0 0 0 0
0 0 0 1 0 0 0 0 0
0 1 0 0 0 0 0 0 0
0 0 0 0 0 0 1 0 0
0 0 0 1 0 0 0 0 0
0 0 0 0 0 0 0 1 0
0 0 0 0 0 0 0 0 1
11
0 0 1 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 1
0 0 0 1 0 0 0 0 1 0 0
0 1 0 1 1 0 0 0 1 0 0
0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 1 0 0
0 0 0 0 0 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0