Longer Line - 80%

using System;

class Program
{
    static void Main(string[] args)
    {
        double x1 = double.Parse(Console.ReadLine());
        double y1 = double.Parse(Console.ReadLine());
        double x2 = double.Parse(Console.ReadLine());
        double y2 = double.Parse(Console.ReadLine());

        double x3 = double.Parse(Console.ReadLine());
        double y3 = double.Parse(Console.ReadLine());
        double x4 = double.Parse(Console.ReadLine());
        double y4 = double.Parse(Console.ReadLine());

        double lengthFirstLine = lineLength(x1, y1, x2, y2);
        double lengthSecondLine = lineLength(x3, y3, x4, y4);

        if (lengthFirstLine >= lengthSecondLine)
        {
            bool isFirstCloser = closerPoint(x1, y1, x2, y2);
            if (isFirstCloser) Console.WriteLine($"({x1}, {y1})({x2}, {y2})");
            else Console.WriteLine($"({x2}, {y2})({x1}, {y1})");
        }
        else if (lengthFirstLine < lengthSecondLine)
        {
            bool isFirstCloser = closerPoint(x3, y3, x4, y4);
            if (isFirstCloser) Console.WriteLine($"({x3}, {y3})({x4}, {y4})");
            else Console.WriteLine($"({x4}, {y4})({x3}, {y3})");
        }
    }

    private static double lineLength(double x1, double y1, double x2, double y2)
    {
        double a1 = Math.Abs(x1) + Math.Abs(x2);
        double b1 = Math.Abs(Math.Abs(y1) - Math.Abs(y2));
        return Math.Sqrt(a1 * a1 + b1 * b1);
    }

    private static bool closerPoint(double x1, double y1, double x2, double y2)
    {
        double c1 = Math.Sqrt(x1 * x1 + y1 * y1);
        double c2 = Math.Sqrt(x2 * x2 + y2 * y2);
        bool closerOrNot = true;
        if (c1 < c2) closerOrNot = true;
        else if (c1 > c2) closerOrNot = false;
        return closerOrNot;
    }
}