0 1 1.0
0 2 1.0
0 3 1.0
1 2 1.0
1 3 1.0
2 3 1.0
3 4 0.1
4 5 1.0
4 15 1.0
5 6 1.0
6 7 1.0
7 8 1.0
8 9 1.0
9 10 1.0
10 11 1.0
11 12 1.0
12 13 1.0
13 14 1.0
14 15 1.0