data/flow/graph_structure/easy/graph139.txt

7 19
1 2 3
1 4 3
1 5 7
1 3 9
2 4 7
3 1 6
3 0 2
4 2 10
4 1 3
4 6 5
4 5 7
4 3 5
4 0 1
5 4 1
5 3 5
6 2 5
6 4 6
6 5 3
6 0 10
4 5
17