Permutation
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As the Holi festival was approaching near, so Aryan planned a party for HolikaDahan, and invited all his friends to the party at his home. He decided to give surprise to his friends by giving them gifts. So, he decided to put a digital lock on every gift, in such a way, that the password of the lock accepts $n$ unique digits. Being over smart, he gives password to each of his friend. To make the t
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solution.cppC++17
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