Is it a way to make impossible to define define deleted i base class methods in derived class? [duplicate]

Is it a way to make that deleted method(e.g. copy operations) also won't be possible to define in the derived classes? As if I will access with the base class pointer how it supposed to work?

class A
{
public:
    A() = default;
    ~A() = default;
    A(const A& a) = delete;
    A& operator=(const A& a) = delete;
};

class B : public A
{
    int n{1};
public:
//why am I allowed do that? it's deleted in the base class
    B(const B& b) { n = b.n; }
    B& operator=(const B& b) { n = b.n; } 
};