7 28
1 1 0.0
1 2 1.120863337572548
1 3 0.0
1 4 0.0
1 5 0.0
1 6 0.0
1 7 0.0
2 2 0.0
2 3 -1.5847900283467309
2 4 0.0
2 5 0.0
2 6 0.0
2 7 0.0
3 3 0.0
3 4 0.8110760899796219
3 5 0.0
3 6 0.0
3 7 0.0
4 4 0.0
4 5 0.2517984022580159
4 6 0.0
4 7 0.0
5 5 0.0
5 6 0.32715960499427754
5 7 0.0
6 6 0.0
6 7 -1.816200272700367
7 7 0.0