CHRISTMAS EVE

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On the day of Christmas, when everyone is busy celebrating, but suddenly $N$ aliens come on Earth and each alien demands a unique positive number $(number>0)$ from Santa. Everyone is afraid to see the aliens on earth. So, Santa wants the aliens to go back from earth, and the only way for the aliens to go back is that the GCD of the numbers (given by Santa to aliens) of every possible pair of al

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solution.cppC++17

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