4 10
1 1 0.0
1 2 -1.0122405290572716
1 3 0.0
1 4 0.0
2 2 0.0
2 3 0.8189872201566858
2 4 0.0
3 3 0.0
3 4 -0.3247868660204611
4 4 0.0