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;

namespace ITP1_8_B
{
    class Program
    {
        static void Main()
        {
            for (; ; )
            {
                char[] x = Console.ReadLine().ToCharArray();

                if (x[0] == '0') break;

                int sum = 0;

                for (int i = 0; i < x.Length; i++) sum += (int)Char.GetNumericValue(x[i]);

                Console.WriteLine(sum);
            }
        }
    }
}