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 JAVA (judge verdict: Runtime Error)


import java.util.Scanner;
public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		while(sc.hasNext()) {
			int x = sc.nextInt();
			//System.out.println(x);
			if(x == 0) {
		//		System.out.println("???????????????");
				break;
			}
			String strX = String.valueOf(x);
			String strA ="";
			int intSum = 0;
			for(int i = 0; i < strX.length(); i++) {
				strA = strX.substring(i,i+1);
				intSum += Integer.parseInt(strA);
			}
			System.out.println(intSum);
		}
	}
}