data/hamilton/graph_structure/hard/graph141.txt

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