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๐Ÿ‘3๐Ÿ”ฅ2
class UserMaincode:
   
    def arrangements(cls, input1):
        if input1 == 1:
            return 0
        elif input1 == 2:
            return 1
        else:
            return (input1 - 1) * (cls.arrangements(input1 - 1) + cls.arrangements(input1 - 2))


Number of selective arrangements โœ