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Consider directed graph which has n + 2 layers numbered from left to right by integers from 0 up to n + 1. The leftmost (0) and the rightmost (n + 1) layers both contain only one vertex while every other layer contains exactly m vertices. Vertices are numbered independently in each layer by integers from 0 to m - 1. For each pair of vertices which are in the adjacent layers (i and i + 1 for any i

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solution.cppC++17

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