using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Mathematical Lines APP: "); 

        Console.WriteLine("Enter Coordinate xA: "); 

        double xA = Convert.ToDouble(Console.ReadLine()); 

        Console.WriteLine("Enter Coordinate yA: "); 

        double yA = Convert.ToDouble(Console.ReadLine()); 

        Console.WriteLine("Enter Coordinate xB: "); 

        double xB = Convert.ToDouble(Console.ReadLine()); 

        Console.WriteLine("Enter Coordinate yB: "); 

        double yB = Convert.ToDouble(Console.ReadLine()); 

        double slope = (yB- yA) / (xB - xA); 

        slope = Math.Round(slope,2); 

        Console.WriteLine ("Slope: " + slope); 

        double distance = Math.Sqrt(Math.Pow(xB - xA, 2) + Math.Pow(yB - yA, 2)); 

        distance = Math.Round (distance, 2); 

        Console.WriteLine("Distance: " + distance); 

        double midpointx = (xA + xB) /2; 

        midpointx = Math.Round(midpointx, 1); 

        double midpointy = (yA + yB) /2; 

        midpointy = Math.Round(midpointy,1); 

        Console.WriteLine("Midpoint" + $"({midpointx},{midpointy})"); 

    }

}