using System;

public class Program

{

    public static void Main()

    {

        int year;

        year = Convert.ToInt16 (Console.ReadLine());

        int leapyear = year%4;

        if (leapyear==0)

        {

            Console.WriteLine("It is a leap year");

        }

        else

        {

            Console.WriteLine("It's not a leap year");

        }

    }

}