using System;

public class Program

{

    public static string leapYear(int year)

    {

        if ((year % 4 == 0 | year % 400 == 0) && year % 100 != 0)

        { return year+" is a leap year!"; }

        else

        { return year+" is not a leap year!"; } 

    }

    public static void Main()

    {

        Console.WriteLine("Enter the year: ");

        int year = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine(leapYear(year));

    }

}