Y Figures

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You are given a tree with N nodes, numbered from 1 to N. It is rooted at node 1, and each node i is labelled with a positive integer labeli. ‘Y Figures’ of a node X are defined as the number of ordered triplets of nodes (A, B, C) satisfying: - labelA = labelB = labelC = labelX. - A is an ancestor of X. - B and C are in the subtree of X and LCA(B,C) = X. - A, B, C, X are pairwise distinct. Yo

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solution.cppC++17

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