public static void main(String[] args) throws Exception {
        List<String> data = new ArrayList<>();
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String filePath = reader.readLine();
        FileReader fileReader = new FileReader(filePath);
        BufferedReader bufferedReader = new BufferedReader(fileReader);
        while (bufferedReader.ready()) {
            char[] line = new char[8];
            bufferedReader.read(line);
            bufferedReader.readLine();
            data.add(new String(line).trim());
        }
        bufferedReader.close();

        int maxId = Integer.MIN_VALUE;
        for (String str : data) {
            int id = Integer.parseInt(str);
            if (id > maxId) {
                maxId = id;
            }
        }
        if (args[0].equals("-c")) {
            BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(filePath, true));
            bufferedWriter.newLine();
            bufferedWriter.write(String.valueOf(++maxId));
            bufferedWriter.close();
        }
    }