data/cycle/graph_structure/hard/graph1.txt

26 25
20 14
9 11
9 18
17 1
25 14
8 14
13 9
2 18
0 3
6 5
0 15
25 6
7 23
23 8
6 16
6 4
20 10
24 19
19 13
11 12
21 12
6 1
25 22
15 6
18 3