using System;

public class Program

{

    public static void Main()

    {

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

        string x = Console.ReadLine();

        bool valid = int.TryParse(x, out int parsedValue);

        if(valid)

        {

            if(parsedValue % 4 == 0 && parsedValue % 100 != 0)

            {

                Console.WriteLine("Leap Year");

            }

            else

            {

                Console.WriteLine("Not a Leap Year");

            }

        }

        else

        {

            Console.WriteLine("Invalid Input");

        }

    }

}