4
0 -1 -1  0  1 -1  0
0  1 -1  0  0  0  1
0  0  0  1 -1 -1  0
0 -1 -2  1  1 -2  1
0
5 4 2
-1 -1  0
-1 -2  1
 1 -2  1
 1 -1  0
 0  0  1
0 -1 -1  0  1 -1  0 1
0  0  0  1 -1 -1  0 1
0 -1 -2  1  1 -2  1 1
0  1 -1  0  0  0  1 1
