[[[0,1,0,1],[0,1,0,1],[0,1,0,1]],[[0,1,0,1],[0,1,0,1],[0,1,0,1]]]

#include <iostream>
#include <fstream>
#include <cstdlib>
#include "include/rapidjson/document.h"
#include "include/rapidjson/istreamwrapper.h"
#include "include/rapidjson/writer.h"
#include "include/rapidjson/stringbuffer.h"
#include "include/rapidjson/ostreamwrapper.h"

using namespace rapidjson;

int main()
{
    std::ifstream ifs("input.json");
    if (!ifs.is_open()) {
        std::cerr << "file error!" << std::endl;
        return EXIT_FAILURE;
    }

    IStreamWrapper isw (ifs);
    Document doc;
    doc.ParseStream(isw);

    StringBuffer buffer;
    Writer<StringBuffer> writer (buffer);
    doc.Accept(writer);

    if (doc.HasParseError()) {
        std::cout << " Error " << std::endl;
        return EXIT_FAILURE;
    }

    const std::string res(buffer.GetString());
    std::cout << res << std::endl;

    return EXIT_SUCCESS;
}

[[[0,1,0,1],[0,1,0,1],[0,1,0,1]],[[0,1,0,1],[0,1,0,1],[0,1,0,1]]]