using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("enter a");

        int a = int.Parse(Console.ReadLine());

        Console.WriteLine("enter b");

        int b = int.Parse(Console.ReadLine());

        Console.WriteLine("enter c");

        int c = int.Parse(Console.ReadLine());

        double x1 = ((-1*b) + Math.Sqrt(b*b-4*a*c))/(2*a);

        double x2 = ((-1*b) - Math.Sqrt(b*b-4*a*c))/(2*a);

        Console.WriteLine("x1 = ");

        Console.WriteLine(x1);

        Console.WriteLine("x2 = ");

        Console.WriteLine(x2);

    Console.WriteLine("רשום מספר בבקשה ");

        int x = int.Parse(Console.ReadLine());

        int y = int.Parse(Console.ReadLine());

        int z = int.Parse(Console.ReadLine());

        int s =(x+y+z);

        Console.WriteLine(s);

        Console.WriteLine(Math.Sqrt(s));

    }

}