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find path matrix of exact length.

gammaman
in Computer Science

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Say I have a digraph with any given number of nodes and I am told to find the path matrix of exactly length 3. What exactly does this mean?

I know the matrix is represented as a 2D array of size n x n, depending on the number of nodes in the digraph.

I also know that R3(path length 3) = R * R * R.

So if anyone could please respond as to what is meant by an exact path matrix length and possibly show an example, that would be great.

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