4 10
1 1 0.0
1 2 -1.2308333573226906
1 3 0.0
1 4 0.0
2 2 0.0
2 3 2.558747273491544
2 4 0.0
3 3 0.0
3 4 -0.9636149562612216
4 4 0.0