Question: Consider a digraph D = (V;A; `) in which all edges except those incident to a node z have non- negative edge lengths. Describe and

Consider a digraph D = (V;A; `) in which all edges except those incident to a node z have non- negative edge lengths. Describe and analyze an algorithm to compute a shortest s-t path in D in O (m + n log n) time. You may assume that both s and t are dierent from z.

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