4 10
1 1 0.0
1 2 -0.4542204525638565
1 3 0.0
1 4 0.0
2 2 0.0
2 3 -0.4865248607292248
2 4 0.0
3 3 0.0
3 4 -0.03239375924399173
4 4 0.0