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.PrintWriter;
import java.util.Scanner;

public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    PrintWriter pw = new PrintWriter(System.out);

    while (true) {
        String s = sc.nextLine();

        if ("0".equals(s)) break;

        int ans = 0;
        for (char c : s.toCharArray()) {
            ans += Integer.valueOf(c) - 48;
        }
        pw.println(ans);
    }
    
    pw.flush();
  }
}