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 C# (judge verdict: Accepted)

using System;

namespace Test
{
    
    class MainClass
    {
        public static void Main(string[] args)
        {
            var inputs = Array.ConvertAll(Console.ReadLine().Split(),double.Parse);
            var x1 = inputs[0];
            var y1 = inputs[1];
            var x2 = inputs[2];
            var y2 = inputs[3];

            var lineX = Math.Abs(x2 - x1);
            var lineY = Math.Abs(y2 - y1);
            var result = Math.Sqrt(Math.Pow(lineX, 2) + Math.Pow(lineY, 2));

            Console.WriteLine(result);
        }
    }
}