namespace std {
typedef decltype(sizeof(int)) size_t;
template <class _E> class initializer_list {
const _E *__begin_;
size_t __size_;
initializer_list(const _E *__b, size_t __s) : __begin_(__b), __size_(__s) {}
public:
typedef _E value_type;
typedef const _E &reference;
typedef const _E &const_reference;
typedef size_t size_type;
typedef const _E *iterator;
typedef const _E *const_iterator;
initializer_list() : __begin_(nullptr), __size_(0) {}
size_t size() const { return __size_; }
const _E *begin() const { return __begin_; }
const _E *end() const { return __begin_ + __size_; }
};
template <class _E>
class vector {
public:
vector(initializer_list<_E> init);
~vector();
};
} // namespace std