UVA - 11933 - Splitting Numbers

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

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringBuffer sb = new StringBuffer("");
        while (true) {
            int x = Integer.parseInt(br.readLine());
            if (x == 0) {
                break;
            }
            String intial = Integer.toBinaryString(x);
            StringBuilder str1 = new StringBuilder(""), str2 = new StringBuilder("");
            boolean flag = true;
            int counter = 0;
            for (int i = 0; i < intial.length(); i++) {
                if (flag) {
                    str1.append(intial.charAt(i));
                    str2.append('0');
                } else {
                    str2.append(intial.charAt(i));
                    str1.append('0');
                }
                if (intial.charAt(i) == '1') {
                    if (flag) {
                        flag = false;
                    } else {
                        flag = true;
                    }
                    counter++;
                }
            }
            if (counter % 2 == 0) {
                sb.append(Integer.parseInt(str2.toString(), 2)).append(' ').append(Integer.parseInt(str1.toString(), 2)).append('\n');
            } else {
                sb.append(Integer.parseInt(str1.toString(), 2)).append(' ').append(Integer.parseInt(str2.toString(), 2)).append('\n');
            }
        }
        System.out.print(sb);
    }
}