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(void)
{
int i = 0, sum = 0;
char x[1100];

while(1){

scanf("%s",&x);

if(x == '0')
break;

while(1){

if(x[i] == '\0')
break;

sum += x[i] - '0';

i++;
}

printf("%d\n",sum);
}

return 0;
}