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.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {

            List<int> result = new List<int>();

            while (true)
            {

                string inputtext = Console.ReadLine();

                //??\??????????????????"0"????????°????????????????????????
                if (inputtext == "0") break;

                char[] calcdata = inputtext.ToCharArray();

                int sum = 0;

                for (int i = 0; i < calcdata.Length; i++)
                {
                    sum += int.Parse(calcdata[i].ToString());
                }

                result.Add(sum);
            
            }


            foreach(var output in result)
            {
                Console.WriteLine(output);
            }
        }
    
    }

}