Trip and Palindromes

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Serega is an avid traveller. He has already visited numerous exotic places, and now wants to embark on a journey to Treeland. There are N cities in Treeland that Serega wants to visit. Also, roads have been laid between some N-1 pairs of cities in Treeland. Roads are bidirectional, and there exists a unique path between any two Treeland cities. Each of Treeland's roads has its own class, wich is

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solution.cppC++17

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