Question: Vertex Cycle Cover Given a directed graph G = ( V , E ) , a vertex cycle cover is a subset of vertices such

Vertex Cycle Cover
Given a directed graph G =(V, E), a vertex cycle cover is a subset of vertices such that every simple cycle
in G passes through at least one of these vertices. Consider the following related decision problem: Vertex
Cycle Cover (VCC): Given a digraph G and an integer k, does G contain a vertex cycle cover of size at most
k? Show that VCC is in NP.

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