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<cctype>
#include<cstdio>
using namespace std;

int main(){
    char ch[1000] = {};
    int i = 0;
    int sum = 0;
    scanf("%c", ch[i]);
    while(1){
        
        if(ch[i] == 0 && ch[i - 1] == '\n'){
            break;
        } else if (ch[i] == '\n'){
            printf("%c\n", sum);
            sum = 0;
        } else {
            sum += ch[i];
        }
        i += 1;
        
    }
    return 0;
}