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: Wrong Answer)

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int l,i,j,n,S=0;
        String c="";
        for(i=0; ;i++){
            c=sc.next();    
            l=c.length();
            if(c.equals("0")){
                break;
            }else{
                for(j=0;j<=l-1;j++){
                    n=Integer.parseInt(c.substring(j,j+1));
                    S+=n;
                }
            }
            System.out.println(S);                    
        } 
    }
}