package 郵便配達;

import java.util.Scanner;

import javax.swing.JFrame;

public class Main {

	void run() {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		if (s.length() == 1 && s.charAt(0) == '0') {
			System.out.println(0);
		} else
			System.out.println(s + "0");
	}

	public static void main(String[] args) {
		new Main().run();
	}
}