%Num of Node, Num of links
8,12
%Links and link weights
0-1-4-1
0-2-3-2
1-2-4-3
1-3-1-1
2-4-5-2
3-4-3-2
3-5-2-1
3-6-4-1
4-6-4-6
5-6-3-1
5-7-3-2
6-7-3-4