Question: Let G be a directed graph with N vertices. A vertex s is called a sink if, for every v in V such that s

Let G be a directed graph with N vertices. A vertex s is called a sink if, for every v in V such that s ≠ v, there is an edge (v, s), and there are no edges of the form (s, v). Give an O(N) algorithm to determine whether or not G has a sink, assuming that G is given by its N × N adjacency matrix.

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