4 10
1 1 0.0
1 2 -0.1769705244805739
1 3 0.0
1 4 0.0
2 2 0.0
2 3 0.5460647022441509
2 4 0.0
3 3 0.0
3 4 -0.1675920644268971
4 4 0.0