5 15
1 1 0.0
1 2 -0.14533898559823688
1 3 0.0
1 4 0.0
1 5 0.0
2 2 0.0
2 3 -1.2816725158266864
2 4 0.0
2 5 0.0
3 3 0.0
3 4 -0.6563048123675764
3 5 0.0
4 4 0.0
4 5 0.0003808588221086001
5 5 0.0