num = int(input("Enter a year: "))
if num % 4 == 0:
    if num % 100 == 0:
        print(num, "is not a leap year")
        if num % 400 == 0: 
            print(num, "is a leap year")
    else:
        print(num, "is a leap year")
else:
    print(num, "is not a leap year")