using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter your Number:");

        if(!int.TryParse(Console.ReadLine(), out int num)) {

            Console.WriteLine("Invalid Number");

            return;

        }

        if(num%4==0&&num%100!=0){

            Console.WriteLine("This is a Leap Year");

            return;

        }

        Console.WriteLine("This is not a Leap Year");

    }

}