4 10
1 1 0.0
1 2 -1.142270036301563
1 3 0.0
1 4 0.0
2 2 0.0
2 3 0.3249793392278169
2 4 0.0
3 3 0.0
3 4 -0.052783350016861824
4 4 0.0