public void GraphIntv_CloneGraphTest1()
{
UndirectedGraphNode t0 = new UndirectedGraphNode(0),
t1 = new UndirectedGraphNode(1),
t2 = new UndirectedGraphNode(2);
t0.Neighbors.Add(t1);
t0.Neighbors.Add(t2);
t1.Neighbors.Add(t0);
t1.Neighbors.Add(t2);
t2.Neighbors.Add(t0);
t2.Neighbors.Add(t1);
t2.Neighbors.Add(t2);
UndirectedGraphNode r = CloneGraph(t0);
Assert.AreEqual(0, r.Label);
Assert.AreEqual(2, r.Neighbors.Count);
UndirectedGraphNode r1 = r.Neighbors[0];
Assert.AreEqual(1, r1.Label);
Assert.AreEqual(2, r1.Neighbors.Count);
UndirectedGraphNode r2 = r.Neighbors[1];
Assert.AreEqual(2, r2.Label);
Assert.AreEqual(3, r2.Neighbors.Count);
}
public static UndirectedGraphNode CloneGraph(UndirectedGraphNode node)
{
if (node == null)
{
return(null);
}
Queue <UndirectedGraphNode> q = new Queue <UndirectedGraphNode>();
UndirectedGraphNode ret = new UndirectedGraphNode(node.Label);
ret.Neighbors = node.Neighbors;
Dictionary <UndirectedGraphNode, UndirectedGraphNode> umap =
new Dictionary <UndirectedGraphNode, UndirectedGraphNode>();
umap[node] = ret;
q.Enqueue(ret);
while (q.Count != 0)
{
List <UndirectedGraphNode> v = new List <UndirectedGraphNode>();
UndirectedGraphNode n = q.Dequeue();
foreach (UndirectedGraphNode k in n.Neighbors)
{
if (umap.ContainsKey(k))
{
v.Add(umap[k]);
}
else
{
UndirectedGraphNode a = new UndirectedGraphNode(k.Label);
a.Neighbors = k.Neighbors;
v.Add(a);
q.Enqueue(a);
umap[k] = a;
}
}
n.Neighbors = v;
}
return(ret);
}