4 10
1 1 0.0
1 2 -1.3668688410767695
1 3 0.0
1 4 0.0
2 2 0.0
2 3 1.0229912111700366
2 4 0.0
3 3 0.0
3 4 0.3237343153836437
4 4 0.0