#include <iostream>

class Writer {
public:
    virtual void Write(const char * data, size_t len) {
        for (size_t i = 0; i < len; ++i, ++data) {
            std::cout << *data << ' ';
        }
        std::cout << '\n';
    }
};

// #include "writer.h"

class BufferedWriter : public Writer {
private:
    size_t size;
public:
    BufferedWriter(size_t size_) : size(size_) {}

    void Write(const char * data, size_t len) override {
        char * data_ = data;
        char * buff = new char[size];
        char * buff_ = buff;
        size_t size_ = size;
        while (len >= size) {
            while (size_ > 0)
                *buff_ = *data_;
                ++buff_, ++data_, --len, --size_;
            Writer::Write(buff, size);
            size_ = size;
            buff_ = buff;
        }
        size_ = len;
        while (len > 0) {
            *buff_ = *data_;
            --len, ++buff_, ++data_;
        }
        Writer::Write(buff, size_);
        delete[] buff;
    }
};


// #include "BufferedWriter.h"
/*
int main() {
    char * arr = new char[7];
    char * arr_ = arr;
    char j = '1';
    for (size_t i = 0; i < 7; ++i, ++j) {
        *arr_ = j;
    }

    BufferedWriter buf(3);

    buf.Write(arr, 7);

    delete[] arr;
} */