2
4
0 10000 10000 0
0 0 1 10000
0 1 0 10000
0 0 0 0
6
0 16 13 0 0 0
0 0 10 12 0 0
0 4 0 0 14 0
0 0 9 0 0 20
0 0 0 7 0 4
0 0 0 0 0 0

