data/cycle/graph_structure/hard/graph1023.txt

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