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)
{
    char num[1000];
    int sum = 0, i = 0;
    
    while(num[0] != '0'){
        scanf("%s", &num[i]);
        if(num[i] == '\n'){
            printf("%d\n", sum);
            sum = 0;
            i = 0;
        }
        sum += num[i];
        i++;
    }
    return 0;
}