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 JAVA (judge verdict: Accepted)

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		String str = scan.nextLine();
		String[] distance = str.split(" ");
		double x = Math.abs(Double.parseDouble(distance[0]) - Double.parseDouble(distance[2]));
		double y = Math.abs(Double.parseDouble(distance[1]) - Double.parseDouble(distance[3]));
		double ans = Math.pow((Math.pow(x, 2) + Math.pow(y, 2)), 0.5);
		System.out.printf("%.8f",ans);
		

	}

}