data/cycle/graph_structure/hard/graph1001.txt

26 27
13 7
18 10
15 25
10 16
1 6
0 1
2 0
17 4
23 21
18 23
7 14
6 22
14 19
8 15
12 20
11 12
0 4
25 17
5 9
12 6
19 2
14 24
15 1
2 17
17 23
14 3
9 15