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,j,n,sum;
		while(1){
			scanf("%d", &n);
			while(n!=0){
				sum += n%10;
				n = n/10;
			}
			printf("%d\n", sum);
		}
	printf("\n");
	return 0;
}