data/hamilton/graph_structure/hard/graph0.txt

11 21
0 10
3 5
2 9
2 3
8 7
0 2
6 10
3 1
5 8
10 5
8 2
9 4
2 10
10 3
0 9
5 4
9 5
2 7
5 2
1 10
6 2