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