4 10
1 1 0.0
1 2 -2.058416695280964
1 3 0.0
1 4 0.0
2 2 0.0
2 3 0.7405277287759962
2 4 0.0
3 3 0.0
3 4 -0.05657418814914434
4 4 0.0