Question: Given a digraph D = (V; A; `) in which all but one arc (u; v) have non-negative lengths, describe an algorithm to test whether

Given a digraph D = (V; A; `) in which all but one arc (u; v) have non-negative lengths, describe an algorithm to test whether D has a negative circuit in O (m + n log n) time.

m= |A| and n=|V|

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