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Suppose that, in addition to edge capacities, a flow network has vertex capacities. that is each vertex vv has a limit l(v)l(v) on how much flow can pass though vv. show how to transform a flow network g = (v, e)g=(v, e) with vertex capacities into an equivalent flow network g' = (v', e')g ′ =(v ′ ,e ′ ) without vertex capacities, such that a maximum flow in g'g ′ has the same value as a maximum flow in gg. how many vertices and edges does g'g ′ have?

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