Problem 2: For each of the two directed graphs below, determine whether they are acyclic. If a digraph is not acyclic, give at least one cycle in this digraph. If a digraph is acyclic, provide its topological ordering. G b H b

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Adjacency matrix representation

An adjacency matrix is a square matrix that represents a finite graph. The matrix denotes whether a particular pair of nodes in a graph is adjacent or not. In brief, an adjacency matrix is an array of size N x N, where N is the number of vertices in the graph. The adjacency matrix can be used to represent a directed graph, undirected graph or a weighted graph.