5 15
1 1 0.0
1 2 -0.811706037237248
1 3 0.0
1 4 0.0
1 5 0.0
2 2 0.0
2 3 -1.2607413283838251
2 4 0.0
2 5 0.0
3 3 0.0
3 4 -1.741938358392951
3 5 0.0
4 4 0.0
4 5 -0.8477881301772511
5 5 0.0