Question: Let G = (V, E) be a weighted, directed graph with source vertex s, and let G be initialized by INITIALIZE-SINGLE-SOURCE(G, s). Prove that if

Let G = (V, E) be a weighted, directed graph with source vertex s, and let G be initialized by INITIALIZE-SINGLE-SOURCE(G, s). Prove that if a sequence of relaxation steps sets π[s] to a non-NIL value, then G contains a negative-weight cycle.

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