using System;

public class Program

{

    public static void Main(string[] args)

    {

        Pizza pizza1 = new ItalianPizza();

        pizza1 = new TomatoPizza(pizza1); // итальянская пицца с томатами

        Console.WriteLine("Название: {0}", pizza1.Name);

        Console.WriteLine("Цена: {0}", pizza1.GetCost());

        Pizza pizza2 = new ItalianPizza();

        pizza2 = new CheesePizza(pizza2);// итальянская пиццы с сыром

        Console.WriteLine("Название: {0}", pizza2.Name);

        Console.WriteLine("Цена: {0}", pizza2.GetCost());

        Pizza pizza3 = new BulgerianPizza();

        pizza3 = new TomatoPizza(pizza3);

        pizza3 = new CheesePizza(pizza3);// болгарская пиццы с томатами и сыром

        Console.WriteLine("Название: {0}", pizza3.Name);

        Console.WriteLine("Цена: {0}", pizza3.GetCost());

        Console.ReadLine();

    }

}

abstract class Pizza

{

    public Pizza(string n)

    {

        this.Name = n;

    }

    public string Name {get; protected set;}

    public abstract int GetCost();

}

class ItalianPizza : Pizza

{

    public ItalianPizza() : base("Итальянская пицца")

    { }

    public override int GetCost()

    {

        return 10;

    }

}

class BulgerianPizza : Pizza

{

    public BulgerianPizza()

        : base("Болгарская пицца")

    { }

    public override int GetCost()

    {

        return 8;

    }

}

abstract class PizzaDecorator : Pizza

{

    protected Pizza pizza;

    public PizzaDecorator(string n, Pizza pizza) : base(n)

    {

        this.pizza = pizza;

    }

}

class TomatoPizza : PizzaDecorator

{

    public TomatoPizza(Pizza p) 

        : base(p.Name + ", с томатами", p)

    { }

    public override int GetCost()

    {

        return pizza.GetCost() + 3;

    }

}

class CheesePizza : PizzaDecorator

{

    public CheesePizza(Pizza p)

        : base(p.Name + ", с сыром", p)

    { }

    public override int GetCost()

    {

        return pizza.GetCost() + 5;

    }

}