year=int(input("Enter a year: "))
year4=year%4
year100=year%100
year400=year%400

if year4==0:
    print("the year", year, "is a leap year")
elif year100==0 and year400!=0:
    print ("the year", year, "is not a leap year")
elif year100==0 and year400==0:
    print("the year", year, "is a leap year")
else:
    print("the year", year, "is not a leap year")