import java.io.BufferedReader;
import java.io.InputStreamReader;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
/**
 *
 * @author cteam056
 */
public class More {

    static BufferedReader reader;

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws Exception {
        reader = new BufferedReader(new InputStreamReader(System.in));
        String token;
        StringBuilder builder;
        while ((token = reader.readLine()) != null) {
            builder = new StringBuilder();
            int sign = 1;
            int i;
            for (i = token.length() - 1; i >= -2; i--) {
                int digit;
                if (i < 0) {
                    digit = -1;
                } else if (token.charAt(i) == '1') {
                    digit = 1;
                } else {
                    digit = -1;
                }
                if (digit * sign == -1) {
                    break;
                }
                sign *= -1;
            }
            if (i == -1) {
                builder.append('1');
            } else if (i == -2) {
                builder.append("11");
            }
            for (int j = 0; j < token.length(); j++) {
                if (j >= i) {
                    if (token.charAt(j) == '1') {
                        builder.append('0');
                    } else {
                        builder.append('1');
                    }
                } else {
                    builder.append(token.charAt(j));
                }
            }
            int k;
            for (k = 0; k < builder.length() - 1; k++) {
                if (builder.charAt(k) == '1'){
                    break;
                }
            }
            System.out.println(builder.substring(k));
        }
    }
}