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;

import static java.lang.Math.pow;
import static java.lang.Math.sqrt;

class Main{
    
    public static void main(String[] arg){

        Scanner in = new Scanner(System.in);

        String input = in.nextLine();
        String [] param_line = input.split(" ", 0);

        double x1 = Double.parseDouble(param_line[0]);
        double y1 = Double.parseDouble(param_line[1]);
        double x2 = Double.parseDouble(param_line[2]);
        double y2 = Double.parseDouble(param_line[3]);

        double d = sqrt(pow(x2-x1,2)+pow(y2-y1, 2));

        System.out.println(d);
    }
}