/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package more;

import java.util.Scanner;

/**
 *
 * @author cteam042
 */
public class More {



    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        while (true) {
            String input = in.nextLine();
            if (input.charAt(input.length() - 1) == '0') {
                System.out.println(input.substring(0, input.length() - 1) + "1");
                continue;
            }


            char[] output;
            output = input.toCharArray();
            boolean shift = false;
            for (int i = input.length() - 1; i > 0; i = i - 2) {
                shift=false;
                if (input.charAt(i - 1) == '0' && input.charAt(i) == '0') {
                    output[i] = '1';
                    break;
                }
                if (input.charAt(i - 1) == '0' && input.charAt(i) == '1') {
                    output[i - 1] = '1';
                    output[i] = '0';
                    shift=true;
                    continue;
                }
                if (input.charAt(i - 1) == '1' && input.charAt(i) == '0') {
                    output[i] = '1';
                    break;
                }
                if (input.charAt(i - 1) == '1' && input.charAt(i) == '1') {
                    output[i - 1] = '0';
                    output[i] = '0';
                    break;
                }

            }
            if(shift&&output[0]=='1'){
                System.out.print("110");
                for (int i = 1; i < output.length; i++) {
                    System.out.print(output[i]);
                    
                }
                System.out.println("");
                continue;
            }
            if(output[0]=='0'&&output[1]=='0'){
                for (int i = 2; i < output.length; i++) {
                    System.out.print(output[i]);
                    
                }
                System.out.println("");
                continue;
            }
            for (int i = 0; i < output.length; i++) {
                System.out.print(output[i]);
                
            }
            System.out.println("");

        }




    }
}