data/hamilton/graph_structure/hard/graph131.txt

13 35
2 5
2 11
8 4
5 0
1 11
1 5
12 3
8 10
9 7
1 7
7 3
12 1
5 9
12 11
1 6
9 3
1 8
2 6
8 0
11 9
9 8
5 6
6 3
0 2
2 7
10 11
0 10
10 2
8 11
10 4
12 2
5 11
0 4
2 3
5 10