"""simple docstring"""






from pathlib import PurePosixPath
from typing import Optional

import fsspec
from fsspec import AbstractFileSystem
from huggingface_hub.hf_api import DatasetInfo

from ..utils.file_utils import get_authentication_headers_for_url
from ..utils.hub import hf_hub_url





class 					_A		(			lowerCAmelCase      ):
      snake_case__     :  Optional[int]				    =      ''
      snake_case__     :  str				    =      'hf-legacy'  # "hf://"" is reserved for hffs

      def __init__(		self						,			__lowerCAmelCase = None						,			__lowerCAmelCase = None						,			**__lowerCAmelCase						,			):







            """simple docstring"""



            super().__init__(self						,			**__lowerCAmelCase		)
            lowercase								=      repo_info
            lowercase								=      token
            lowercase								=      None

      def 							A__			(		self		):







            """simple docstring"""



            if self.dir_cache is None:
                  lowercase								=      {}
                  for hf_file in self.repo_info.siblings:
                        # TODO(QL): add sizes
                        lowercase								=      {
                            """name""": hf_file.rfilename,
                            """size""": None,
                            """type""": """file""",
                        }
                        self.dir_cache.update(
                            {
                                str(__lowerCAmelCase		): {"""name""": str(__lowerCAmelCase		), """size""": None, """type""": """directory"""}
                                for d in list(PurePosixPath(hf_file.rfilename		).parents		)[:-1]
                            }		)

      def 							A__			(		self						,			__lowerCAmelCase						,			__lowerCAmelCase = "rb"						,			**__lowerCAmelCase						,			):







            """simple docstring"""



            if not isinstance(self.repo_info						,			__lowerCAmelCase		):
                  raise NotImplementedError(f'Open is only implemented for dataset repositories, but got {self.repo_info}'		)
            lowercase								=      hf_hub_url(self.repo_info.id						,			__lowerCAmelCase						,			revision=self.repo_info.sha		)
            return fsspec.open(
                __lowerCAmelCase						,			mode=__lowerCAmelCase						,			headers=get_authentication_headers_for_url(__lowerCAmelCase						,			use_auth_token=self.token		)						,			client_kwargs={"""trust_env""": True}						,			).open()

      def 							A__			(		self						,			__lowerCAmelCase						,			**__lowerCAmelCase		):







            """simple docstring"""



            self._get_dirs()
            lowercase								=      self._strip_protocol(__lowerCAmelCase		)
            if path in self.dir_cache:
                  return self.dir_cache[path]
            else:
                  raise FileNotFoundError(__lowerCAmelCase		)







      def 							A__			(		self						,			__lowerCAmelCase						,			__lowerCAmelCase=False						,			**__lowerCAmelCase		):







            """simple docstring"""



            self._get_dirs()
            lowercase								=      PurePosixPath(path.strip("""/"""		)		)
            lowercase								=      {}
            for p, f in self.dir_cache.items():
                  lowercase								=      PurePosixPath(p.strip("""/"""		)		)
                  lowercase								=      p.parent
                  if root == path:
                        lowercase								=      f
            lowercase								=      list(paths.values()		)
            if detail:
                  return out
            else:
                  return sorted(f["""name"""] for f in out		)




"""simple docstring"""






def      UpperCAmelCase__			(							lowerCAmelCase__	:int = 5_0						)					->       int:
      '''simple docstring'''


      lowercase								=      [1] * (length + 1)

      for row_length in range(3   ,						length + 1						):
            for block_length in range(3   ,						row_length + 1						):
                  for block_start in range(row_length - block_length						):
                        ways_number[row_length] += ways_number[
                            row_length - block_start - block_length - 1
                        ]

                  ways_number[row_length] += 1

      return ways_number[length]


if __name__ == "__main__":
       print(F"""{solution() = }""")



