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step = 1
for
root
in
Vertices:
if
not
label[root]:
component[root] = NewComponent()
component[root].AddVertex(root)
Q.Append(root)
pred[root] = root
while
Q.IsNotEmpty():
v = Q.Top()
label[v] = step
step = step + 1
for
w
in
Neighborhood(v):
if
not
pred[w]:
component[v].AddVertex(w)
component[w] = component[v]
Q.Append(w)
pred[w] = v