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;
using System.Linq;

namespace ConsoleApplication5
{
    class Program
    {
        static void Main(string[] args)
        {
            bool flag = true;
            while (flag)
            {
                char[] input = Console.ReadLine().ToCharArray();
                int[] numbers = (Array.ConvertAll(input, new Converter<char, int>(s => int.Parse(s.ToString()))));

                if (input[0] != '0')
                {
                    Console.WriteLine(numbers.Sum());
                }
                else
                {
                    flag = false;
                }
            }
        }
    }
}