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 AOJ
{
    class Program
    {
        static void Main(string[] args)
        {
            int ans = 0;
            while(true)
            {
                ans = 0;
                //??????????????????
                var read = Console.ReadLine();
                //var temp_string = read.Split(' ');

                if(read=="0")
                {
                    break;
                }

                //???????????£????????????char?????????????§£
                var read_arry = read.ToCharArray();


                //char?????????1?????????????????????
                foreach(char c in read_arry)
                {
                    ans += int.Parse(c.ToString());
                }

                //??¨???
                Console.WriteLine(ans);
            }
            
        }
    }
}