@startuml

class Property {
    # double price
    # string address
    + show()
    + clone()
}

class Apartment {
    - int rooms
    + show()
    + clone()
}

class Car {
    - string brand
    - int horsepower
    + show()
    + clone()
}

class CountryHouse {
    - int floors
    - double landArea
    + show()
    + clone()
}

class City {
    - vector<Property>
    + addProperty()
    + showAll()
}

Property <|-- Apartment
Property <|-- Car
Property <|-- CountryHouse

City o-- Property

@enduml