Is it a tree

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You are given an unweighted, undirected graph. Write a program to check if it's a tree topology. Input The first line of the input file contains two integers N and M --- number of nodes and number of edges in the graph (0 Output Print YES if the given graph is a tree, otherwise print NO. Example Input: 3 2 1 2 2 3 Output: YES

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solution.cppC++17

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