data/hamilton/graph_structure/hard/graph142.txt

13 31
7 8
6 4
11 3
3 6
7 12
7 10
2 8
5 7
8 3
0 4
2 0
6 8
11 2
2 6
2 12
10 5
3 4
3 1
9 0
1 6
12 4
9 1
3 9
10 9
9 7
12 11
2 10
6 5
7 6
11 8
12 3