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 Project
{
	class MainClass
	{
		public static void Main(string[] args)
		{
			while (true)
			{
				string s = Console.ReadLine();
				if (s == "0") { break; }
				string[] sar = new string[s.Length];
				int sum = 0;
				for (int i = 0; i < s.Length; i++)
				{
					sar[i] = s[i].ToString();
					sum += int.Parse(sar[i]);
				}
				Console.WriteLine(sum);
			}
		}
	}
}