Chef and his Books

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Chef is an avid reader of various books. He has N books from B1 to Bn. Each book Bi has an author number Ai and happiness factor Hi. Reading book Bi gives Chef happiness P * Hi, where P is the number of authors whose books Chef read before (including the current book). Chef plans to read all books he has. Find the maximum amount of happiness he can gain by reading all books. Input - First line

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solution.cppC++17

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