using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace YukiCoder
{
	public class QuestionNo552
	{
		public static void Main()
		{
			string Number = Console.ReadLine();

			if (Number == "0")
			{
				Console.WriteLine(Number);
			}
			else
			{
				Console.WriteLine(Number + "0");
			}
		}

	}
}