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 JavaScript (judge verdict: Accepted)

'use strict'

const main = arg => {
    var input = arg.trim().split("\n");
    const endIndex = input.indexOf("0");
    input = input.slice(0, endIndex);
    const result = [];

    input.forEach(str => {
        const sum = str.split("").map(num => parseInt(num ,10)).reduce((a,b) => a + b);
        result.push(sum);
    });
    
    console.log(result.join("\n"));
}

main(require('fs').readFileSync('/dev/stdin', 'utf8'));