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)

public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????
		java.util.Scanner sc = new java.util.Scanner(System.in);
		StringBuilder sb = new StringBuilder();

		while (true) {

			String data = sc.nextLine();
			if ( data.equals("0") ) break;

			int sum = 0;
			for (int i=0; i < data.length(); i++) {
				sum += Integer.parseInt( data.substring(i, i+1) );
			}

			sb.append(sum + "\n");

		}

		System.out.print(sb);
	}

}