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<iostream>
#include<stdio.h>
using namespace std;
  
int main()
{
    int b,sum;
	char x[1001];
	
	while(1){
		sum = 0;
		while(1){
			cin >> x;
			if(x[0] == 0){
				break;
			}
			b = *x-'0';
                        sum = sum + b;
		}
 		if(sum == 0){
 			break;
 		}
		cout << sum << endl;
	}
	return 0;
}