Princess and Dejavu

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*Having successfully implemented a "two-factor" authentication for her castle, princess Princy now thinks of ways to improve the security to her castle* She proposes the following authentication in-order to get into the castle. The entrant at the entry gate now has to provide a new integer $n$ (*apart from the old already secure two-factor authentication*). Princy only likes integers not greater

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solution.cppC++17

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