#include <iostream>
#include <string>
#include <vector>

#include "bounded_buffer.hpp"

#define PAGE_SIZE 4

int main()
{
    bounded_buffer buffer;
    buffer.capacity = PAGE_SIZE;

    std::string line;
    while (std::getline(std::cin, line))
    {
        add_to_buffer(&buffer, line);

        if (buffer_size(&buffer) == buffer_capacity(&buffer))
            flush_buffer(&buffer);
    }

    if (buffer_size(&buffer) > 0)
        flush_buffer(&buffer);

    return 0;
}