#include <vector>

/**
 * @brief Set of tools to manipulate vector stacks.
 */
namespace Stack
{
template <class type>
bool isEmpty(const std::vector<type>& stack) {
    return stack.empty();
};

// template <class type>
// bool isFull(std::vector<type>& stack) {
//     return !stack->empty();
// };

template <class type>
void put(std::vector<type>& stack, const type& item) {
    stack.push_back(item);
}

template <class type>
type take(std::vector<type>& stack) {
    if (stack.size() == 0) throw "a";
    type toReturn = stack.back();
    stack.pop_back();
    return toReturn;
}

namespace oper {
    template <class type>
    void add(std::vector<type>& stack) {
        take(stack);
        // put(take(stack)+)
    }
}

}; // namespace stack