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 num[256], i, t;
	unsigned char s[5];

	num['0'] = 0;
	num['1'] = 1;
	num['2'] = 2;
	num['3'] = 3;
	num['4'] = 4;
	num['5'] = 5;
	num['6'] = 6;
	num['7'] = 7;
	num['8'] = 8;
	num['9'] = 9;

	for (;;) {
		t = 0;
		scanf("%s", s);
		for (i = 0; s[i] != '\0'; i++) {
			t += num[s[i]];
		}
		if (t == 0) return 0;
		printf("%d\n", t);
	}
	return 0;
}