4 10
1 1 0.0
1 2 0.6622738913233934
1 3 0.0
1 4 0.0
2 2 0.0
2 3 0.3745981879007088
2 4 0.0
3 3 0.0
3 4 -0.25298063471505894
4 4 0.0