4 10
1 1 0.0
1 2 1.3680702230150692
1 3 0.0
1 4 0.0
2 2 0.0
2 3 1.2255792117549744
2 4 0.0
3 3 0.0
3 4 -1.2426225124546009
4 4 0.0