In undirected graphs the distance between a vertex from itself is 0, what about directed graphs if there is no path with positive length? For example only one vertex
is it 0 too or $\infty$?
In undirected graphs the distance between a vertex from itself is 0, what about directed graphs if there is no path with positive length? For example only one vertex
is it 0 too or $\infty$?
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