Find the Root

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Chef Prithwish has a binary tree having N nodes i.e each node of the tree can have atmost 2 children. Each node has a unique id represented by a number. A node X is considered to be an ancestor of node Y if node Y is a child of node X or if there is some node Z for which X is an ancestor of Z and Y is a child of Z. No node is an ancestor of itself. A special node called the root node is an ances

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solution.cppC++17

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