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.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Main{
  public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringBuilder sb = new StringBuilder();
    int sum;
    while(true){
      String line = br.readLine();
      if("0".equals(line)){
      break;
    }
    char[] c = line.toCharArray();
    sum = 0;
    for(int i = 0; i < c.length; i++){
      sum = sum + Character.getNumericValue(c[i]);
    }
    sb.append(sum);
    sb.append("\n");
  }
  System.out.print(sb);
}
}