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 scan=new Scanner(System.in);
		int x,ans;
		while(true){
			x=scan.nextInt();
			ans=0;
			if(x==0) break;
			ans+=(x/1000);
			x=x-((x/1000)*1000);
			ans+=(x/100);
			x=x-((x/100)*100);
			ans+=(x/10);
			x=x-((x/10)*10);
			ans+=x;
			System.out.println(ans);
		}
		scan.close();
	}
}