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>
#define MAX 1000

int main(){
	int i=0,l,tmp=0;
	char c[MAX+1];
	int sum;
	while(1){
		sum=0;
		scanf("%s", c);
		for(i=0; i<MAX; i++){
			if(c[0]=='0'){break;}
			tmp = c[i] - '0';
			sum += tmp;
			//printf("%d:",sum);
		}
		printf("%d\n", sum);
	}
	return 0;
}