data/cycle/graph_structure/hard/graph1018.txt

26 28
18 0
0 2
12 3
13 14
21 20
11 24
4 24
17 16
20 9
24 25
7 10
23 8
13 3
18 24
22 2
23 9
14 0
16 23
12 22
1 0
10 0
0 5
2 15
3 16
1 25
19 23
6 17
0 3