using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace równaniekwa
{
    class Program
    {
        static void Main(string[] args)
        {
            Double a, b, c, d, x1, x2, p, q;

            Console.WriteLine("Wprowadź a:");
            a = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("Wprowadź b:");
            b = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("Wprowadź c:");
            c = Convert.ToInt32(Console.ReadLine());

            d = Math.Pow(b,2) - (4 * a * c);

            p = (x1 + x2) / 2;
            q = -d / (4 * a);

            if (d == 0)
            {
                Console.Write("Delta rowan zero\n");
                x1 = -b / (2.0 * a);
                x2 = x1;
                Console.Write("Pierwsza wartosc= {0}\n", x1);
                Console.Write("Druga wartosc= {0}\n", x2);
            }
            else if (d > 0)
            {
                Console.Write("Delta wieksza od zera\n");

                x1 = (-b + Math.Sqrt(d)) / (2 * a);
                x2 = (-b - Math.Sqrt(d)) / (2 * a);

                Console.Write("Pierwsza wartosc= {0}\n", x1);
                Console.Write("Druga wartosc= {0}\n", x2);
            }
            else
                Console.Write("Delta mniejsza od zera.\n Brak rozwiazan. \n\n");


            //Iloczynowa
            if (x1>0&&x2>0)
            {
                Console.WriteLine("y=" + a + "(x-" + x1 + ")(x-" + x2 + ")");
            }
            else if (x1<0&&x2>0)
            {
                Console.WriteLine("y=" + a + "(x+" + x1 + ")(x-" + x2 + ")");
            }
            else if (x1 > 0 && x2 < 0)
            {
                Console.WriteLine("y=" + a + "(x-" + x1 + ")(x+" + x2 + ")");
            }
            else
                Console.WriteLine("y=" + a + "(x+" + x1 + ")(x+" + x2 + ")");


            //Kanoniczna
            if (p>0&&q>0)
            {
                Console.WriteLine("y=" + a + "(x-" + p + ")^2+" + q);
            }
            else if (p < 0 && q > 0)
            {
                Console.WriteLine("y=" + a + "(x+" + p + ")^2+" + q);
            }
            else if (p < 0 && q < 0)
            {
                Console.WriteLine("y=" + a + "(x+" + p + ")^2-" + q);
            }
            else
                Console.WriteLine("y=" + a + "(x-" + p + ")^2-" + q);

            Console.WriteLine("p: " + p + " q: " + q);
            Console.ReadKey(true);
        }
    }
}