# A leap year is exactly divisible by 4
# except for century years (years ending with 00).
# The century year is a leap year only if it is perfectly divisible by 400.
# For example,
# 2017 is not a leap year
# 1900 is a not leap year
# 2012 is a leap year
# 2000 is a leap year

# Python program to check if the input year is a leap year or not
# To get year (integer input) from the user
year = int(input("Enter a year: "))

if (year % 4) == 0:
    if (year % 100) == 0:
        if (year % 400) == 0:
            print("{0} is a leap year".format(year))
        else:
            print("{0} isn't a leap year".format(year))
    else:
        print("{0} is a leap year".format(year))
else:
    print("{0} isn't a leap year".format(year))