data/hamilton/graph_structure/hard/graph137.txt

13 32
6 3
7 3
4 0
7 12
2 6
9 3
10 11
1 12
0 6
11 7
10 6
9 8
11 1
5 10
0 9
9 10
4 2
1 9
11 4
12 4
12 10
5 11
0 12
1 3
8 0
12 3
7 1
5 2
3 4
5 4
2 9
2 1