public LazyPrim(EdgeWeightedGraph graph) : base(graph)
{
marked = new bool[graph.VertexCount];
mst = new Queue <UndirectedEdge>();
priorityQueue = new HeapPriorityQueue <UndirectedEdge>(graph.EdgeCount);
Visit(0);
while (!priorityQueue.IsEmpty)
{
UndirectedEdge edge = priorityQueue.DeleteMax();
if (marked[edge.V] && marked[edge.W])
{
continue;
}
mst.Enqueue(edge);
if (!marked[edge.V])
{
Visit(edge.V);
}
if (!marked[edge.W])
{
Visit(edge.W);
}
}
foreach (var edge in mst)
{
weight += edge.Weight;
}
}
public Kruskal(EdgeWeightedGraph graph) : base(graph)
{
mst = new Queue <UndirectedEdge>();
IPriorityQueue <UndirectedEdge> priorityQueue = new HeapPriorityQueue <UndirectedEdge>(graph.Edges());
UnionFind unionFind = new UnionFind(graph.VertexCount);
while (!priorityQueue.IsEmpty && mst.Count < graph.VertexCount - 1)
{
UndirectedEdge edge = priorityQueue.DeleteMax();
if (unionFind.IsConnected(edge.V, edge.W))
{
continue;
}
unionFind.Union(edge.V, edge.W);
mst.Enqueue(edge);
}
}
public void AddEdge(UndirectedEdge edge)
{
adjacents[edge.V].Add(edge);
adjacents[edge.W].Add(edge);
edgeCount++;
}