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 a[1000];

int x,sum,i;

a[0] = 1;

while(a[0]!=0){

sum =0;

gets(a);

for(i=0;i<=1000;i++){

sum = sum +a[i];

};

printf("%d",sum);

};

return 0;

};