data/connectivity/graph_structure/hard/graph1003.txt

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