#include <iostream>
#include <fstream>
#include <string>
#include <boost/regex.hpp>
#include <unordered_set>
#include <algorithm>

int main() {
    std::ifstream inputFile("input.txt");
    std::ofstream outputFile("output.txt");

    if (!inputFile.is_open() || !outputFile.is_open()) {
        std::cerr << "Не удалось открыть файлы ввода/вывода." << std::endl;
        return 1;
    }

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

    boost::regex variablePattern(regexPattern);

    std::unordered_set<std::string> variableNames;

    int lineNumber = 0;
    bool hasErrors = false;

    std::string line;
    std::string currentLine;

    while (std::getline(inputFile, line)) {
        currentLine += line;

        if (line.back() == ';') {
            lineNumber++;

            boost::smatch match;
            if (regex_search(currentLine, match, variablePattern)) {
                std::string syntaxCheck = match[0];
                if (syntaxCheck != currentLine) {
                    outputFile << "Синтаксическая ошибка в строке " << lineNumber << ", позиция " << (match.position()) << std::endl;
                    hasErrors = true;
                }

                for (size_t i = 1; i < match.size(); ++i) {
                    std::string variables = match[i];
                    std::istringstream variableStream(variables);
                    std::string variableName;

                    size_t posInLine = match.position(i)+ 1;

                    while (std::getline(variableStream, variableName, ',')) {
                        variableName.erase(std::remove_if(variableName.begin(), variableName.end(), ::isspace), variableName.end());

                        if (variableName.empty()) {}

                        if (variableNames.count(variableName) > 0) {
                            outputFile << "Дублирование переменной '" << variableName << "' в строке " << lineNumber << ", позиция " << posInLine << std::endl;
                            hasErrors = true;
                        } else {
                            variableNames.insert(variableName);
                        }

                        posInLine += variableName.length() + 2;
                    }
                }
            } else {
                outputFile << "Синтаксическая ошибка в строке " << lineNumber << std::endl;
                hasErrors = true;
            }

            currentLine.clear();
        } else if (line.back() == ',') {
            currentLine += '\n';
        }
    }

    if (!hasErrors) {
        outputFile << "Нет ошибок синтаксиса." << std::endl;
    }

    return 0;
}