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#include <cstddef>
class container {
public:
const std::size_t max_size;
container() = delete;
container(std::size_t max_size);
virtual ~container();
virtual void add(int v) = 0;
virtual int get() = 0;
protected:
int *m_storage = nullptr;
};
class lifo : public container {
public:
lifo(std::size_t max_size) : container(max_size) {}
void add(int v) override;
int get() override;
void push(int v);
int pop();
private:
unsigned m_top = 0;
};
class fifo : public container {
fifo(std::size_t max_size) : container(max_size) {}
void add(int v) override;
int get() override;
};
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