template<typename T> class faux_vector {
    std::vector<T> storage;
    std::size_t actual_size;
public:
    faux_vector() : actual_size(0) {}
    void push_back(T& t) {
        if (actual_size == storage.capacity()) {
            std::vector<T> new_buffer;
            new_buffer.resize(storage.size() * 1.5 + 1);
            for(int i = 0; i < storage.size(); i++) {
                storage[i].swap(new_buffer[i]);
            }
            std::swap(storage, new_buffer);
        }
        storage[actual_size++].swap(t);
    }
    void pop_back() {
        T t;
        storage[actual_size--].swap(t);
    }
}