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 in = new BufferedReader(new InputStreamReader(System.in));
		short size, sum;
		while (true) {
			sum = 0;
			String input = in.readLine();
			if (input.equals("0")) {
				break;
			}
			size = (short) input.length();
			char[] charNum = input.toCharArray();
			for (int i = 0; i < size; i += 1) {
				charNum[i] = input.charAt(i);
				sum += Short.parseShort(Character.toString(charNum[i]));
			}
			System.out.println(sum);
		}
	}
}