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 sum,i;
char x[1001];


for(;;){
        scanf("%s",x);
        if(x[0]==0)break;

        sum=0;
        for(i=0;x[i]!='\0';i++)
                      sum+=x[i]-'0';
                      printf("%d\n",sum);
        }
 return 0;

}