void* operator new(std::size_t count) {
   std::cout << "new: " << count << '\n';
   return malloc(count);
}

void operator delete(void* ptr) noexcept {
   std::cout << "delete: " << ptr << '\n';
   free(ptr);
}

struct A {
   A(int a) : x(a) {};
   int x;
};
struct B : A {
   B(int b) : A(b), n(b) {};
   int n;
   std::string s{"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"};
};

int main() {
   for(int i = 0; i < 10; ++i) {
       B *b = new B{10};
       A *a = b;
       delete a;
   }
}