Longer Line

using System;

namespace PLongest_Line
{
    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());

            string result = FindLongestLine(x1, y1, x2, y2, x3, y3, x4, y4);

            if (result == "line1")
            {
                CloserPoint1(x1, y1, x2, y2);
            }
            else
            {
                CloserPoint2(x3, y3, x4, y4);
            }
        }

        private static void CloserPoint2(double x3, double y3, double x4, double y4)
        {
            double a = Math.Sqrt(x3 * x3 + y3 * y3);
            double b = Math.Sqrt(x4 * x4 + y4 * y4);

            if (a <= b)
            {
                Console.WriteLine($"({x3}, {y3})({x4}, {y4})");
            }
            else
            {
                Console.WriteLine($"({x4}, {y4})({x3}, {y3})");
            }
        }

        static void CloserPoint1(double x1, double y1, double x2, double y2)
        {
            double a = Math.Sqrt(x1 * x1 + y1 * y1);
            double b = Math.Sqrt(x2 * x2 + y2 * y2);

            if (a <= b)
            {
                Console.WriteLine($"({x1}, {y1})({x2}, {y2})");
            }
            else
            {
                Console.WriteLine($"({x2}, {y2})({x1}, {y1})");
            }
        }

        static string FindLongestLine(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
        {
            double a = Math.Abs(x1) + Math.Abs(x2);
            double b = Math.Max(Math.Abs(y1), Math.Abs(y2)) - Math.Min(Math.Abs(y1), Math.Abs(y2));
            double line1 = Math.Sqrt(a * a + b * b);

            double c = Math.Abs(x3) + Math.Abs(x4);
            double d = Math.Max(Math.Abs(y3), Math.Abs(y4)) - Math.Min(Math.Abs(y3), Math.Abs(y4));
            double line2 = Math.Sqrt(c * c + d * d);

            if (line1 >= line2)
            {
                return "line1";
            }
            else
            {
                return "line2";
            }
        }
    }
}