4 10
1 1 0.0
1 2 0.9563472295898201
1 3 0.0
1 4 0.0
2 2 0.0
2 3 -0.11447784308154436
2 4 0.0
3 3 0.0
3 4 0.40837436713788755
4 4 0.0