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 C (judge verdict: Time Limit Exceeded)

#include <stdio.h>

int main()
{
  int i, d[128], ans;
  char data[128];
  while(1) {
    ans = 0;
    fgets(data, 128, stdin);
    for(i = 0; data[i] != '\0'; ++i) {
      d[i] = (int)(data[i] - '0');
    }
    if(d[0] == 0 && d[1] == '\0')
      break;
    else
      for(i = 0; d[i] != '\0'; ++i) {
        ans += d[i];
      }
    printf("%d\n", ans);
  }
  return 0;
}