enum Fruit{Apple, Pear, Kiwi};
struct Masha_t {
  std::multiset<Fruit> basket;
}Masha;

for(int i=0; i<4; ++i)
  Masha.basket.insert(Apple);

for(int i=0; i<3; ++i)
  Masha.basket.insert(Pear);

size_t answer = Masha.basket.size();