#if 1
      const std::string path_sep = "._.";
      const std::string input_files_loc="./input_files"+path_sep;
      const std::string output_files_loc="./output_files"+path_sep;
#else
      const std::string input_files_loc="./input_files/";
      const std::string output_files_loc="./output_files/";
#endif
