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.IOException;
import java.io.InputStreamReader;
 
public class Main{
 
    public static void main(String[] args) throws IOException {
 
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        do {
            // input
            char[] firstInput = br.readLine().toCharArray(); // ex : 123
            int[] num = new int[firstInput.length];// base
            char seconInput = 0;
            for (int i = 0; i < firstInput.length; i++) {
                seconInput = firstInput[i];// split
                num[i] = Character.getNumericValue(seconInput);// input info
            }
            // constraints
            if (num[0] == 0 && seconInput == '0' )break;
 
            // plus works & output
            int sum = 0;
            for (int i = 0; i < num.length; i++) {
 
                sum += num[i];
            }
            System.out.println(sum);
        } while (true);
    }
}