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

namespace yukicoderTest
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            if (input == "0") 
            { 
                Console.WriteLine(input);
            }
            else
            {
                Console.WriteLine(input+"0");
            }
            
        }
    }
}