5
0 -1  0 -1 -2 -1  0
0 -2 -1  0  0  0  1
0  0  0  1 -2  1  0
0 -2  1  0 -1  0 -1
0  0  1  0 -1  1  0
0
6 5 2
-1  0 -1
-2 -1  0
 0  1  0
-1  1  0
-2  1  0
 0  0  1
0 -1  0 -1 -2 -1  0 1
0 -2 -1  0  0  0  1 1
0  0  1  0 -1  1  0 1
0 -2  1  0 -1  0 -1 1
0  0  0  1 -2  1  0 1
