Input Format:
Vertices / Edges
Vert / Vert-to / flow / capacity of edge

Example:
6 8
0 1 10 10
0 2 10 10
1 3 5 8
1 5 5 5
1 2 0 8
2 4 10 10
4 5 10 10
3 5 5 5

Returns edges to be cut:
0->1
0->2