4 10
1 1 0.0
1 2 0.8344239586740035
1 3 0.0
1 4 0.0
2 2 0.0
2 3 -1.4438225711422648
2 4 0.0
3 3 0.0
3 4 0.35080119737192966
4 4 0.0