7
0 4 5 4 3 4 4 
4 0 1 2 3 2 2 
5 1 0 1 2 1 1 
4 2 1 0 1 41 41 
3 3 2 1 0 1 1 
4 2 1 41 1 0 41 
4 2 1 41 1 41 0