Question: Let PTH = { < G, s, t, m > |G is a directed graph without any %3D cycle and there is a path

Let PTH = { < G, s, t, m > |G is

Let PTH = { < G, s, t, m > |G is a directed graph without any %3D cycle and there is a path in G from s to t with length at least m }. Is PTH in P, or NP? Prove your claim.

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