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G <br />
n <br />
a z <br />
i := 1 n <br />
L(vi) := ∞<br />
<br />
L(a) := 0<br />
S := ∅<br />
w(vi, vj) = ∞ w(vi, vi) = 0<br />
z /∈ S <br />
u := S L(u)<br />
S := S ∪ u<br />
v S <br />
L(u) + w(u, v) < L(v) <br />
L(v) := L(u) + w(u, v)<br />
<br />
S <br />
S<br />
<br />
<br />
<br />
O(n 2 ) n <br />
G <br />
n n<br />
n − 1 <br />
<br />
n · (n − 1) + n = n 2 − n + n = n 2<br />
O(n 2 )