


'''simple docstring'''

import itertools
import os
import re


__a:			Any	       =       re.compile(R"""([A-Z]+)([A-Z][a-z])""")
__a:			Optional[Any]	       =       re.compile(R"""([a-z\d])([A-Z])""")

__a:			Optional[Any]	       =       re.compile(R"""(?<!_)_(?!_)""")
__a:			List[Any]	       =       re.compile(R"""(_{2,})""")

__a:			str	       =       R"""^\w+(\.\w+)*$"""

__a:			List[Any]	       =       R"""<>:/\|?*"""
def       __UpperCamelCase	(       UpperCAmelCase					):
 lowercase__    :   List[Any]						= _uppercase_uppercase_re.sub(r'''\1_\2'''		,					lowerCAmelCase__					)
 lowercase__    :   List[Any]						= _lowercase_uppercase_re.sub(r'''\1_\2'''		,					lowerCAmelCase__					)
 return name.lower()
def       __UpperCamelCase	(       UpperCAmelCase					):
 lowercase__    :   Optional[int]						= _single_underscore_re.split(lowerCAmelCase__					)
 lowercase__    :   Optional[Any]						= [_multiple_underscores_re.split(lowerCAmelCase__					) for n in name]
 return "".join(n.capitalize() for n in itertools.chain.from_iterable(lowerCAmelCase__					) if n != ''''''					)
def       __UpperCamelCase	(       UpperCAmelCase					):
 if os.path.basename(lowerCAmelCase__					) != name:
  raise ValueError(F"""Should be a dataset name, not a path: {name}"""					)
 return camelcase_to_snakecase(lowerCAmelCase__					)
def       __UpperCamelCase	(       UpperCAmelCase		,					UpperCAmelCase					):
 if os.path.basename(lowerCAmelCase__					) != name:
  raise ValueError(F"""Should be a dataset name, not a path: {name}"""					)
 if not re.match(_split_re		,					lowerCAmelCase__					):
  raise ValueError(F"""Split name should match \'{_split_re}\'\' but got \'{split}\'."""					)
 return F"""{filename_prefix_for_name(lowerCAmelCase__					)}-{split}"""
def       __UpperCamelCase	(       UpperCAmelCase		,					UpperCAmelCase		,					UpperCAmelCase		,					UpperCAmelCase=None					):
 lowercase__    :   str						= filename_prefix_for_split(lowerCAmelCase__		,					lowerCAmelCase__					)
 if filetype_suffix:
  prefix += F""".{filetype_suffix}"""
 lowercase__    :   Tuple						= os.path.join(lowerCAmelCase__		,					lowerCAmelCase__					)
 return F"""{filepath}*"""





def       __UpperCamelCase	(       UpperCAmelCase		,					UpperCAmelCase		,					UpperCAmelCase		,					UpperCAmelCase=None		,					UpperCAmelCase=None					):
 lowercase__    :   Optional[int]						= filename_prefix_for_split(lowerCAmelCase__		,					lowerCAmelCase__					)
 lowercase__    :   int						= os.path.join(lowerCAmelCase__		,					lowerCAmelCase__					)

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


'''simple docstring'''

class       UpperCAmelCase  :





       '''simple docstring'''



       def __init__(						self			)  ->  List[str]:
        lowercase__    :   Dict						= {}

       def _lowerCAmelCase(						self			)  ->  None:
        print(self.vertex			)
        for i in self.vertex:
         print(__lowerCAmelCase     ,       ''' -> '''     ,       ''' -> '''.join([str(__lowerCAmelCase			) for j in self.vertex[i]]			)			)

       def _lowerCAmelCase(						self     ,       __lowerCAmelCase     ,       __lowerCAmelCase			)  ->  None:
        # check if vertex is already present,
        if from_vertex in self.vertex:
         self.vertex[from_vertex].append(__lowerCAmelCase			)
        else:
         # else make a new vertex
         lowercase__    :   Union[str, Any]						= [to_vertex]

       def _lowerCAmelCase(						self			)  ->  None:
        # visited array for storing already visited nodes
        lowercase__    :   str						= [False] * len(self.vertex			)

        # call the recursive helper function
        for i in range(len(self.vertex			)			):
         if not visited[i]:
          self.dfs_recursive(__lowerCAmelCase     ,       __lowerCAmelCase			)


       def _lowerCAmelCase(						self     ,       __lowerCAmelCase     ,       __lowerCAmelCase			)  ->  None:
        # mark start vertex as visited
        lowercase__    :   List[str]						= True

        print(__lowerCAmelCase     ,       end=''' '''			)

        # Recur for all the vertices that are adjacent to this node
        for i in self.vertex:
         if not visited[i]:
          self.dfs_recursive(__lowerCAmelCase     ,       __lowerCAmelCase			)


if __name__ == "__main__":
  __a:			Optional[Any]	       =       Graph()
  g.add_edge(0, 1)
  g.add_edge(0, 2)
  g.add_edge(1, 2)
  g.add_edge(2, 0)
  g.add_edge(2, 3)
  g.add_edge(3, 3)

  g.print_graph()
  print("""DFS:""")
  g.dfs()

  # OUTPUT:
  # 0  ->  1 -> 2
  # 1  ->  2
  # 2  ->  0 -> 3
  # 3  ->  3
  # DFS:
  #  0 1 2 3

