package algo;

import java.util.*;

public class sample7 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		if(s.equals("0")) {
			System.out.println(0);
			return;
		}
		char[] c = s.toCharArray();
		
		for(int i=0; i < c.length; i++) {
				System.out.print(c[i]);
		}
		System.out.print("0");
	}
}