data/hamilton/graph_structure/hard/graph124.txt

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