Yet Another Counting Problem

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Nayra doesn't like stories of people receiving random arrays as birthday presents, but this time she received an array as a present for her own birthday! After struggling for a day trying to figure out what to do with this array, she asked Aryan for help. He gave her this problem. You are given an array $A = [A_1, A_2, \dots, A_N]$ containing $N$ **distinct** integers. Count the number of ways t

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solution.cppC++17

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