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.Text;
using System.Linq;

class Program
{
    static void Main()
    {
        while (true)
        {
            bool flag = true;
            long[] beta = new long[1500];
            char[] alpha = Console.ReadLine().ToCharArray();


            for (int i = 0; i < alpha.Length; i++)
            {
                beta[i] = int.Parse(alpha[i].ToString());
                beta[1499] += beta[i];
            }
            
            //if (char.IsUpper(alpha[i]) == true)
            //{
            //    alpha[i] =char.ToLower(alpha[i]);
            //}
            //else if (char.IsLower(alpha[i]) == true)
            //{
            //    alpha[i]=char.ToUpper(alpha[i]);
            //}
            if (alpha[0] == '0') { flag = false; break; }

            if (flag == true)
            {
                Console.Write(beta[1499]);

                Console.WriteLine();
            }
        }
    }
}