public LazyPrimMST(EdgeWeightedGraph g)
{
this.MST = new Queue<Edge>();
this._pq = new MinPQ<Edge>();
this._marked = new bool[g.V()];
for (int v = 0; v < g.V(); v++)
if (!this._marked[v])
this.prim(g, v);
}
/// <summary>
/// Initializes a new edge-weighted graph that is a deep copy of G.
/// </summary>
/// <param name="G"></param>
public EdgeWeightedGraph(EdgeWeightedGraph G)
: this(G.V())
{
this._e = G.E();
for (int v = 0; v < G.V(); v++)
{
// reverse so that adjacency list is in same order as original
Part1.Stack<Edge> reverse = new Part1.Stack<Edge>();
foreach (Edge e in G.Adj[v])
reverse.Push(e);
foreach (Edge e in reverse)
this.Adj[v].Add(e);
}
}
public KruskalMST(EdgeWeightedGraph g)
{
MinPQ<Edge> pq = new MinPQ<Edge>();
foreach (Edge e in g.Edges())
pq.Insert(e);
Part1.QuickUnion uf = new Part1.QuickUnion(g.V());
while (!pq.IsEmpty() && this._mst.Count < g.V() - 1)
{
Edge e = pq.DelMin();
int v = e.Either();
int w = e.Other(v);
if (!uf.IsConnected(v, w))
{
uf.Union(v, w);
this._mst.Enqueue(e);
this.Weight += e.Weight();
}
}
}
public PrimMST(EdgeWeightedGraph g)
{
this._edgeTo = new Edge[g.V()];
this._distTo = new double[g.V()];
this._marked = new bool[g.V()];
this._pq = new IndexMinPQ<double>(g.V());
for (int v = 0; v < g.V(); v++)
this._distTo[v] = double.PositiveInfinity;
for (int v = 0; v < g.V(); v++)
if (!this._marked[v])
this.prim(g, v);
}
