Tanushree and Concert

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Tanushree and her friends are organizing her college's fest and she has invited none other than The local train to perform in her college, she is raising money by selling concert passes to people, now the problem is people are counterfeiting the passes and they are trying to enter the auditorium. There are $M$ seats present in the concert auditorium and there are $N$ numbered people from 1 to $N$

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solution.cppC++17

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