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 C# (judge verdict: Accepted)

using System;

public class hello
{
    public static void Main()
    {
        while (true)
        {
            var moji = Console.ReadLine().Trim();
            if (moji == "0") goto end;
            var result = 0;
            for (int i = 0; i < moji.Length; i++)
            {
                result += int.Parse(moji[i].ToString());
            }
            Console.WriteLine(result);
            result = 0;
        }
    end:;
    }
}