7
0 4 4 3 2 3 3 
4 0 0 1 2 1 1 
4 0 0 1 2 1 1 
3 1 1 0 1 41 41 
2 2 2 1 0 1 1 
3 1 1 41 1 0 41 
3 1 1 41 1 41 0