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: Accepted)

import java.io.*;
public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));
        int[] ans={};
        
        while(true){
            String str=buf.readLine();
            if(str.length()==1 && str.charAt(0)=='0'){break;}
            
            int sum=0;
            for(int i=0;i<str.length();i++){
                sum +=str.charAt(i)-'0';
            }
            System.out.println(sum);
        }
    }            
}