using System;

public class Circle
{
    public double X { get; set; }
    public double Y { get; set; }
    public double Radius { get; set; }

    public Circle(double X, double Y, double Radius)
    {
        this.X = X;
        this.Y = Y;
        this.Radius = Radius;
    }

    public override bool Equals(object obj)
    {
        if (obj == null)
            return false;
        Circle c = obj as Circle;
        if (c as Circle == null)
            return false;
        return c.X == this.X && c.Y == this.Y && c.Radius == this.Radius;
    }

    public bool Equals(Circle obj)
    {
        if (obj == null)
            return false;
        return obj.X == this.X && obj.Y == this.Y && obj.Radius == this.Radius;
    }

    public override int GetHashCode()
    {
        int HashPoint;
        if (Radius == 5)
            HashPoint = 1;
        else HashPoint = 2;
        return (int) (Radius * (X + Y)) + HashPoint;
    }
}

public class Program
{
    public static void Main()
    {
        Circle c1 = new Circle(10, 12, 5);
        Circle c2 = new Circle(10, 12, 5);
        Circle c3 = new Circle(100, 120, 50);

        Console.WriteLine("Проверка равности полей: ");
        Console.WriteLine(c1.Equals(c2));
        Console.WriteLine(c1.Equals(c3));

        Console.WriteLine("Возвращаем абстрактный хэш код: ");
        Console.WriteLine(c1.GetHashCode());
        Console.WriteLine(c2.GetHashCode());
        Console.WriteLine(c3.GetHashCode());
    }
}