bool isBalanced(const std::string& s) {
  int count = 0;
  for (size_t i = 0; i < s.length(); ++i) {
    if (s[i] == '(') {
      ++count;
    }
    else if (s[i] == ')') {
      if (--count < 0) { return false; }
    }
  }
  return true;
}

std::string digest(const std::string& param) {
    std::string result;
    result.reserve(param.size() * 2); // Ensure exactly one memory allocation
    for (char letter: param) {
      result.push_back(letter);
      result.push_back(' ');
    }
    result.pop_back();
    return result;
}