3 4 2 0 3
0 0 6 6 
0 4 4 0 
1 1 1 0
4 0 1 0
1 2 1000000 10000
2 3 1000000 10000
3 4 1000000 10000
1 1 4 -4
2 2 3 -40
3 2 1 -4
