year = int ( input ("Enter the year to verify - "))

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