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<cstdio>
#include<cctype>
#include<string.h>
#include<stdio.h>
using namespace std;

int main()
{
    char a[1000];
    cin.getline(a,sizeof(a));
    char c[strlen(a)];
    strcpy(c,a);
    
    while(c[0]!='0'){
        cout<<strlen(c)<<endl;
        char a[1000];
        cin.getline(a,sizeof(a));
        char c[strlen(a)];
        strcpy(c,a);
    }

    cout<<endl;
}