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 ITP_8_B{
    public class Program{
        public static void Main(string[] args){
            while(true){
                string test = Console.ReadLine();
                int sum = 0;
                if(test.Equals("0")) break;

                for(int i=0; i<test.Length; i++){
                    //char??§?????°???1???int???49???????§????????????§48??????????????¨??§?¨?????????????
                    sum += test[i] -48;
                }
                Console.WriteLine(sum);
            }
        }
    }
}