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 Kotlin (judge verdict: Accepted)


import java.util.*

fun main(args : Array<String>) {

  val scanner = Scanner(System.`in`)
  val s = scanner.nextLine().split(" ") ;

  val x1 = s[0].toDouble()
  val y1 = s[1].toDouble()
  val x2 = s[2].toDouble()
  val y2 = s[3].toDouble()

  val xLine = x2 - x1
  val yLine = y2 - y1

  val line = Math.sqrt( Math.pow(xLine, 2.0) + Math.pow(yLine, 2.0) )

  println("%.8f".format(line))
}