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;

class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String input = scanner.nextLine();
        String inputArr[] = input.split(" ");
        
        double x0 = Double.parseDouble(inputArr[0]);
        double y0 = Double.parseDouble(inputArr[1]);
        double x1 = Double.parseDouble(inputArr[2]);
        double y1 = Double.parseDouble(inputArr[3]);
        
        double num = Math.sqrt(Math.pow(x1-x0, 2) + Math.pow(y1-y0, 2));
        System.out.print(num);
    }
}