void Start () {
int s = 0;
EdgeWeightedDigraph G = new EdgeWeightedDigraph(txt);
BellmanFordSP sp = new BellmanFordSP(G, s);
// print negative cycle
if (sp.hasNegativeCycle())
{
foreach (DirectedEdge e in sp.negativeCycle())
print(e);
}
// print shortest paths
else
{
for (int v = 0; v < G.V(); v++)
{
if (sp.hasPathTo(v))
{
string str=(s+" to "+ v+" Distance="+ sp.DistTo(v)+" ");
foreach (DirectedEdge e in sp.PathTo(v))
{
str+=(e + " ");
}
print(str);
}
else
{
print(s+" to "+ v+" no path\n");
}
}
}
}
/**/ public static void main(string[] strarr)
{
In i = new In(strarr[0]);
int i2 = Integer.parseInt(strarr[1]);
EdgeWeightedDigraph edgeWeightedDigraph = new EdgeWeightedDigraph(i);
BellmanFordSP bellmanFordSP = new BellmanFordSP(edgeWeightedDigraph, i2);
if (bellmanFordSP.hasNegativeCycle())
{
Iterator iterator = bellmanFordSP.negativeCycle().iterator();
while (iterator.hasNext())
{
DirectedEdge obj = (DirectedEdge)iterator.next();
StdOut.println(obj);
}
}
else
{
for (int j = 0; j < edgeWeightedDigraph.V(); j++)
{
if (bellmanFordSP.hasPathTo(j))
{
StdOut.printf("%d to %d (%5.2f) ", new object[]
{
Integer.valueOf(i2),
Integer.valueOf(j),
java.lang.Double.valueOf(bellmanFordSP.distTo(j))
});
Iterator iterator2 = bellmanFordSP.pathTo(j).iterator();
while (iterator2.hasNext())
{
DirectedEdge obj2 = (DirectedEdge)iterator2.next();
StdOut.print(new StringBuilder().append(obj2).append(" ").toString());
}
StdOut.println();
}
else
{
StdOut.printf("%d to %d no path\n", new object[]
{
Integer.valueOf(i2),
Integer.valueOf(j)
});
}
}
}
}