4 10
1 1 0.0
1 2 0.7441819622501723
1 3 0.0
1 4 0.0
2 2 0.0
2 3 1.0778693341951733
2 4 0.0
3 3 0.0
3 4 -1.6746370617671476
4 4 0.0