Exemplo n.º 1
0
 private void Dfs(IEdgeWeightedDIgraph g, int v)
 {
     onStack[v] = true;
     marked[v]  = true;
     foreach (var e in g.Adj(v))
     {
         int w = e.To;
         if (HasCycle())
         {
             return;
         }
         else if (!marked[w])
         {
             edgeTo[w] = e;
             Dfs(g, w);
         }
         else if (onStack[w])
         {
             cycle = new Stack <IDirectedEdge>();
             var x = e;
             for (; x.From != w; x = edgeTo[x.From])
             {
                 cycle.Push(x);
             }
             cycle.Push(x);
         }
     }
     onStack[v] = false;
 }
Exemplo n.º 2
0
 private void Relax(IEdgeWeightedDIgraph g, int v)
 {
     foreach (var e in g.Adj(v))
     {
         int w = e.To;
         if (distTo[w] > distTo[v] + e.Weight)
         {
             distTo[w] = distTo[v] + e.Weight;
             edgeTo[w] = e;
         }
     }
 }
        public Topological(IEdgeWeightedDIgraph G)
        {
            IDiGraph g = new DiGraph(G.V);

            for (int i = 0; i < G.V; i++)
            {
                foreach (var e in G.Adj(i))
                {
                    g.AddEdge(e.From, e.To);
                }
            }
            Order = Init(g);
        }
 private void Relax(IEdgeWeightedDIgraph g, int v)
 {
     foreach (var e in g.Adj(v))
     {
         int w = e.To;
         if (distTo[w] > distTo[v] + e.Weight)
         {
             distTo[w] = distTo[v] + e.Weight;
             edgeTo[w] = e;
             if (pq.Contains(w))
             {
                 pq.ChangeKey(w, distTo[w]);
             }
             else
             {
                 pq.Insert(w, distTo[w]);
             }
         }
     }
 }
Exemplo n.º 5
0
 private void Relax(IEdgeWeightedDIgraph g, int v)
 {
     foreach (var e in g.Adj(v))
     {
         int w = e.To;
         if (distTo[w] > distTo[v] + e.Weight)
         {
             distTo[w] = distTo[v] + e.Weight;
             edgeTo[w] = e;
             if (!onQ[w])
             {
                 queue.Enqueue(w);
                 onQ[w] = true;
             }
         }
         if (cost++ % g.V == 0)
         {
             FindNegativeCycle();
         }
     }
 }