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.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);

        while(true){
            int sum = 0;
            String num = scan.nextLine();
            for(int i = 0; i < num.length(); i++){
                sum += Character.digit(num.charAt(i), 10);
            }
            if ( sum == 0){
                break;
            }
            System.out.println(sum);


        }
    }
}