using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("x=");

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

        Console.WriteLine("y=");

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

        Console.WriteLine("z");

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

        double M = (x * x) + (2 * y) - (z / 10);

        Console.WriteLine("rezultat:");

        Console.WriteLine(M);

    }

}