public static FlowNetwork BuildComplexFlowNetwork()
{
Graph g = new Graph();
g.AddEdge("s", "a");
g.AddEdge("s", "b");
g.AddEdge("a", "c");
g.AddEdge("b", "a");
g.AddEdge("b", "c");
g.AddEdge("c", "d");
g.AddEdge("c", "t");
g.AddEdge("d", "b");
g.AddEdge("d", "t");
var dictC = new Dictionary <EdgeKey, int>();
dictC[g.GetEdge("s", "a").GetKey()] = 4;
dictC[g.GetEdge("s", "b").GetKey()] = 8;
dictC[g.GetEdge("a", "c").GetKey()] = 6;
dictC[g.GetEdge("b", "a").GetKey()] = 3;
dictC[g.GetEdge("b", "c").GetKey()] = 6;
dictC[g.GetEdge("c", "d").GetKey()] = 3;
dictC[g.GetEdge("c", "t").GetKey()] = 11;
dictC[g.GetEdge("d", "b").GetKey()] = 1;
dictC[g.GetEdge("d", "t").GetKey()] = 2;
var c = FlowNetwork.DictToFlow(dictC);
return(new FlowNetwork(g, c, "s", "t"));
}