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: Accepted)

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

public class Main {

    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        while (true) {
            String line = br.readLine();
            if (line.length() == 1 && line.charAt(0) == '0') {
                break;
            }

            int sum = 0;
            for (int i = 0; i < line.length(); i++) {
                sum += line.charAt(i) - '0';
            }
            System.out.println(sum);
        }

    }
}