Problem:
Sum of Numbers

Write a program which reads an integer and prints sum of its digits.

Input

The input consists of multiple datasets. For each dataset, an integer x is given in a line. The number of digits in x does not exceed 1000.

The input ends with a line including single zero. Your program should not process for this terminal symbol.

Output

For each dataset, print the sum of digits in x.

Sample Input

123
55
1000
0

Sample Output

6
10
1

Solution in JAVA (judge verdict: WA: Presentation Error)

import java.io.*;

public class Main{
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb = new StringBuilder();

        while(true){
            String line = br.readLine();
            int[] a = new int[line.length()];
            int sum = 0;

            for(int i = 0; i < line.length(); i++){
                a[i] = Integer.parseInt(line.substring(i, i+1));
            }

            if(Integer.parseInt(line) == 0){
                break;
            }else{
                for(int i = 0; i < line.length(); i++){
                    sum += a[i];
                }
                sb.append(sum).append("\n");
            }
        }
        System.out.println(sb.toString());
    }
}