

'''simple docstring'''

from __future__ import annotations

from collections import deque
from collections.abc import Iterator
from dataclasses import dataclass




@dataclass
class 	A_				:






     '''simple docstring'''



     UpperCAmelCase_						:     int
     UpperCAmelCase_						:     int




class 	A_				:






     '''simple docstring'''



     def __init__(		self			:					Optional[Any]					,      lowercase_			:					int	)						->     Any:
      UpperCAmelCase	:     list[list[Edge]]						 =			[[] for _ in range(snake_case__	)]
      UpperCAmelCase	:     Optional[int]						 =			size


     def __getitem__(		self			:					Union[str, Any]					,      lowercase_			:					int	)						->     Iterator[Edge]:
      return iter(self._graph[vertex]	)


     @property
     def        UpperCAmelCase_	(		self			:					Union[str, Any]	)						->     Union[str, Any]:
      return self._size


     def        UpperCAmelCase_	(		self			:					List[Any]					,      lowercase_			:					int					,      lowercase_			:					int					,      lowercase_			:					int	)						->     Dict:


      if weight not in (0, 1):
       raise ValueError('Edge weight must be either 0 or 1.'	)

      if to_vertex < 0 or to_vertex >= self.size:
       raise ValueError('Vertex indexes must be in [0; size).'	)

      self._graph[from_vertex].append(Edge(snake_case__					,      snake_case__	)	)




     def        UpperCAmelCase_	(		self			:					int					,      lowercase_			:					int					,      lowercase_			:					int	)						->     int | None:
      UpperCAmelCase	:     Union[str, Any]						 =			deque([start_vertex]	)
      UpperCAmelCase	:     list[int | None]						 =			[None] * self.size
      UpperCAmelCase	:     str						 =			0

      while queue:
       UpperCAmelCase	:     int						 =			queue.popleft()
       UpperCAmelCase	:     str						 =			distances[current_vertex]
       if current_distance is None:
        continue

       for edge in self[current_vertex]:
        UpperCAmelCase	:     List[str]						 =			current_distance + edge.weight
        UpperCAmelCase	:     List[str]						 =			distances[edge.destination_vertex]
        if (
            isinstance(snake_case__					,      snake_case__	)
            and new_distance >= dest_vertex_distance
        ):
         continue
        UpperCAmelCase	:     Any						 =			new_distance
        if edge.weight == 0:
         queue.appendleft(edge.destination_vertex	)
        else:
         queue.append(edge.destination_vertex	)

      if distances[finish_vertex] is None:
       raise ValueError('No path from start_vertex to finish_vertex.'	)

      return distances[finish_vertex]


if __name__ == "__main__":
 import doctest

 doctest.testmod()







'''simple docstring'''

# Lint as: python3
import itertools
import os
import re


lowercase__         =      re.compile(r"([A-Z]+)([A-Z][a-z])")
lowercase__         =      re.compile(r"([a-z\d])([A-Z])")

lowercase__         =      re.compile(r"(?<!_)_(?!_)")
lowercase__         =      re.compile(r"(_{2,})")

lowercase__         =      r"^\w+(\.\w+)*$"

lowercase__         =      r"<>:/\|?*"




def 				UpperCamelCase(					UpperCAmelCase_     ):
 UpperCAmelCase	:     List[str]						 =			_uppercase_uppercase_re.sub(R'\1_\2'  ,	UpperCAmelCase_     )
 UpperCAmelCase	:     str						 =			_lowercase_uppercase_re.sub(R'\1_\2'  ,	UpperCAmelCase_     )
 return name.lower()




def 				UpperCamelCase(					UpperCAmelCase_     ):
 UpperCAmelCase	:     List[str]						 =			_single_underscore_re.split(UpperCAmelCase_     )
 UpperCAmelCase	:     Optional[Any]						 =			[_multiple_underscores_re.split(UpperCAmelCase_     ) for n in name]
 return "".join(n.capitalize() for n in itertools.chain.from_iterable(UpperCAmelCase_     ) if n != ''     )




def 				UpperCamelCase(					UpperCAmelCase_     ):
 if os.path.basename(UpperCAmelCase_     ) != name:
  raise ValueError(F"""Should be a dataset name, not a path: {name}"""     )
 return camelcase_to_snakecase(UpperCAmelCase_     )




def 				UpperCamelCase(					UpperCAmelCase_  ,	UpperCAmelCase_     ):
 if os.path.basename(UpperCAmelCase_     ) != name:
  raise ValueError(F"""Should be a dataset name, not a path: {name}"""     )
 if not re.match(_split_re  ,	UpperCAmelCase_     ):
  raise ValueError(F"""Split name should match '{_split_re}'' but got '{split}'."""     )
 return F"""{filename_prefix_for_name(UpperCAmelCase_     )}-{split}"""




def 				UpperCamelCase(					UpperCAmelCase_  ,	UpperCAmelCase_  ,	UpperCAmelCase_  ,	UpperCAmelCase_=None     ):
 UpperCAmelCase	:     Dict						 =			filename_prefix_for_split(UpperCAmelCase_  ,	UpperCAmelCase_     )
 if filetype_suffix:
  prefix += F""".{filetype_suffix}"""
 UpperCAmelCase	:     Optional[int]						 =			os.path.join(UpperCAmelCase_  ,	UpperCAmelCase_     )
 return F"""{filepath}*"""




def 				UpperCamelCase(					UpperCAmelCase_  ,	UpperCAmelCase_  ,	UpperCAmelCase_  ,	UpperCAmelCase_=None  ,	UpperCAmelCase_=None     ):
 UpperCAmelCase	:     Optional[int]						 =			filename_prefix_for_split(UpperCAmelCase_  ,	UpperCAmelCase_     )
 UpperCAmelCase	:     str						 =			os.path.join(UpperCAmelCase_  ,	UpperCAmelCase_     )

 if shard_lengths:
  UpperCAmelCase	:     List[str]						 =			len(UpperCAmelCase_     )
  UpperCAmelCase	:     List[str]						 =			[F"""{prefix}-{shard_id:05d}-of-{num_shards:05d}""" for shard_id in range(UpperCAmelCase_     )]
  if filetype_suffix:
   UpperCAmelCase	:     Dict						 =			[filename + F""".{filetype_suffix}""" for filename in filenames]
  return filenames
 else:
  UpperCAmelCase	:     Optional[Any]						 =			prefix
  if filetype_suffix:
   filename += F""".{filetype_suffix}"""
  return [filename]




