data/hamilton/graph_structure/hard/graph129.txt

13 28
2 11
6 8
10 3
0 1
11 6
4 7
12 1
2 12
1 3
4 2
10 7
4 1
2 5
12 4
2 0
11 5
3 6
2 8
3 5
2 3
5 12
1 6
2 9
2 6
8 4
3 7
5 10
8 7