public LazyPrimMST(EdgeWeightedGraph G)
: base(G)
{
_marked = new bool[G.V()];
_mst = new Queue <Edge>();
_pq = new MinPQ <Edge>(G.E());
Visit(G, 0);
while (!_pq.IsEmpty())
{
Edge e = _pq.RemoveMin();
var v = e.Either();
var w = e.Other(v);
if (_marked[v] && _marked[w])
{
continue;
}
_mst.Enqueue(e);
if (!_marked[v])
{
Visit(G, v);
}
if (!_marked[w])
{
Visit(G, w);
}
}
}
public KruskalMST(EdgeWeightedGraph G) : base(G)
{
_pq = new MinPQ <Edge>(G.E());
_mst = new Queue <Edge>();
_uf = new UF(G.V());
foreach (var e in G.Edges())
{
_pq.Insert(e);
}
while (!_pq.IsEmpty() && _mst.Count < G.V() - 1)
{
var e = _pq.RemoveMin();
var v = e.Either();
var w = e.Other(v);
if (_uf.Connected(v, w))
{
continue;
}
_uf.Union(v, w);
_mst.Enqueue(e);
}
}