data/hamilton/graph_structure/hard/graph11.txt

11 22
0 4
9 5
10 1
8 5
7 8
5 3
1 9
1 2
10 7
6 7
5 4
7 0
9 4
1 8
0 6
3 8
5 7
6 5
4 6
1 0
6 2
8 6