5 15
1 1 0.0
1 2 0.4466554923553229
1 3 0.0
1 4 0.0
1 5 0.0
2 2 0.0
2 3 -0.15221212671700696
2 4 0.0
2 5 0.0
3 3 0.0
3 4 -1.0432454722196363
3 5 0.0
4 4 0.0
4 5 -0.084536403464241
5 5 0.0