Problem:
Distance

Write a program which calculates the distance between two points P1(x1, y1) and P2(x2, y2).

Input

Four real numbers x1, y1, x2 and y2 are given in a line.

Output

Print the distance in real number. The output should not contain an absolute error greater than 10-4.

Sample Input

0 0 1 1

Sample Output

1.41421356

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 points = [0, 0];
  let [x1, y1, x2, y2] = content.trim().split(' ');
  const distance = Math.sqrt(Math.pow(x1 - x2, 2) + Math.pow(y1 - y2, 2));
  console.log(distance.toFixed(6));
});