4 10
1 1 0.0
1 2 -0.7668270494467967
1 3 0.0
1 4 0.0
2 2 0.0
2 3 -0.8369839223613121
2 4 0.0
3 3 0.0
3 4 1.0337042279104454
4 4 0.0