data/hamilton/graph_structure/hard/graph127.txt

13 30
2 4
12 4
12 6
2 6
6 4
7 6
4 11
5 2
3 0
4 9
8 9
1 11
12 7
11 3
9 3
5 6
12 2
12 0
2 7
7 0
1 10
6 3
4 0
10 5
8 2
5 9
0 5
11 2
2 1
0 6