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;
class Program
{
    static void Main(string[] args)
    {
        while (true)
        {
            char[] data = Console.ReadLine().ToCharArray();
            if (data[0] == '0') break;
            int sum = 0;
            for (int i = 0, count = data.Length; i < count; i++)
            {
                sum += (int)Char.GetNumericValue(data[i]);
            }
            Console.WriteLine(sum);
        }
    }
}