class BaseHolder {
public:
    virtual ~BaseHolder() {}
    virtual const type_info& type()= 0;
};

template<class T>
class ConcreteHolder : public BaseHolder {

public:
    T t_;
    explicit ConcreteHolder(const T& t) : t_(t) {}
    const type_info& type() {
        return typeid(T);
    }
};


class Any {
    BaseHolder* held_;
public:
    template<class T>
    Any() : held_(0) {}

    template<class T>
    Any(const T& value) :held_(new ConcreteHolder<T>(value)) {}

    template <class U> U cast() const {
        if (typeid(U).hash_code() != (held_->type()).hash_code()) {
            std::cout << "ERROOOOOOOOOOOOOOOOOOOOOOOR" << std::endl;
            return 0;
        }
        return static_cast<ConcreteHolder<U>*> (held_)->t_;
    }

    ~Any() {
        delete held_;
    }
};