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)

let content = '';
process.stdin.resume();
process.stdin.setEncoding('utf8');
process.stdin.on('data', buf => {
  content += buf;
});

process.stdin.on('end', () => {
  const lines = content
    .trim()
    .split('\n')
    .slice(0, -1);

  const result = lines.map(num =>
    num
      .split('')
      .map(n => parseInt(n, 10))
      .reduce((prev, cur) => prev + cur)
  );

  console.log(result.join('\n'));
});