using System;
using System.Linq;
using System.Text;
using System.Numerics;
using System.Collections;
using System.Collections.Generic;

public class Program {
    static void Main(string[] args) {
        var s = Console.ReadLine();
        if (s == "0") {
            Console.WriteLine(0);
        } else {
            Console.WriteLine(s+'0');
        }
        
    }
}