def main():
    num = int(input("Enter an integer to see if it is an Armstrong number: ").strip())
    print(f"{num} is {'' if armstrong_number(num) else 'not '}an Armstrong number.")
    print(f"{num} is {'' if narcissistic_number(num) else 'not '}an Armstrong number.")
    print(f"{num} is {'' if pluperfect_number(num) else 'not '}an Armstrong number.")