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));
		StringBuffer sb = new StringBuffer();

		while (true) {
			String input = br.readLine();
			if ("0".equals(input)) {
				break;
			}
			int sum = 0;
			for (int i =0; i < input.length(); i++) {
				sum += Integer.parseInt(input.substring(i, i+1));
			}
			sb.append(sum + "\n");
		}
		System.out.print(sb.toString());
	}
}