8 6 18
0 1 1.0
0 3 2.0
1 2 3.0
1 3 1.0
1 5 1.0
2 0 1.0
2 2 2.0
3 0 3.0
3 2 4.0
3 4 2.0
4 3 1.0
5 1 2.0
5 4 3.0
5 5 1.0
6 0 2.0
6 3 3.0
7 1 1.0
7 4 3.0