#include <iostream>
#include <fstream>
#include <boost/regex.hpp>

int main() {
    std::ifstream file("input.txt");
    std::string test_str((std::istreambuf_iterator<char>(file)), std::istreambuf_iterator<char>());
    file.close();

    boost::regex regexPattern(
        "\\b"
        "(?:int|long int|double|float|char|short int|long double|long|short|long long)?"
        "\\s+"
        "([a-zA-Z_]\\w*)"
        "\\s*"
        "(?:\\[[1-9][0-9]*\\]\\s*)*"
        "(?:,\\s*([a-zA-Z_]\\w*)\\s*(?:\\[[1-9][0-9]*\\]\\s*)*)*"
        ";"
    );

    boost::smatch matches;
    std::ofstream output_file("output.txt");
    int error_line = 1;
    bool error_found = false;

    auto start = test_str.cbegin();
    auto end = test_str.cend();
    while (boost::regex_search(start, end, matches, regexPattern)) {
        for (size_t i = 1; i < matches.size(); ++i) {
            if (!matches[i].str().empty()) {
                error_found = true;
                output_file << "Error found at line " << error_line << ": " << matches[i] << std::endl;
                break;
            }
        }
        if (error_found)
            break;
        ++error_line;
        start = matches[0].second;
    }

    if (!error_found)
        output_file << "\nAnalysis of variable declarations completed successfully!\n";
    else
        output_file << "\nError in variable declaration. Stopping execution!\n";

    output_file.close();

    return 0;
}