Construct an adjacency matrix from a given graph or digraph.

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Construct a network diagram to represent practical situations, e.g. tra cks connecting camp sites in a national park, a social network, a transport network with one -way streets, the results of a round-robin sporting competition.

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Understand the meaning of graph, vertex (node), edge (arc), loop, degree of a vertex, subgraph, simple graph, complete graph, bipartite graph, directed graph (digraph), weighted graph and network.