4 10
1 1 0.0
1 2 2.7656846013811323
1 3 0.0
1 4 0.0
2 2 0.0
2 3 -0.32857861816386463
2 4 0.0
3 3 0.0
3 4 0.10808509747790844
4 4 0.0