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: Wrong Answer)

process.stdin.resume();
process.stdin.setEncoding('utf8');
process.stdin.on('data', function (chunk)
{
  var x = chunk.split(" ");
  x1 = parseInt(x[0], 10);
  y1 = parseInt(x[1], 10);
  x2 = parseInt(x[2], 10);
  y2 = parseInt(x[3], 10);

  console.log(Math.sqrt(Math.pow((x1 - x2), 2) + Math.pow((y1 - y2), 2)));
});