ABHISHEK AND HIS THEORY OF GRAPH

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Chef Abhishek is learning about graphs. While solving problems on graph theory, he came across a specific problem. The problem asked how many paths of length 3 there were between two specific nodes (say A and B) in the given undirected graph. He solved it quickly just by looking at the graph and is now asking you the same problem. But instead of path of length 3, he is asking for a path of length

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solution.cppC++17

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