


"""simple docstring"""




from collections import deque

def        lowercase							(		lowerCAmelCase__ :     str			) ->      List[str]:
		__a           =			len(lowerCAmelCase__			)
		__a           =			deque()
		__a           =			[False for _ in range(lowerCAmelCase__			)]
		__a           =			[-1 for _ in range(lowerCAmelCase__			)]
		__a           =			index_of[:]

		def strong_connect(lowerCAmelCase__ :     Optional[Any]    ,					lowerCAmelCase__ :     Union[str, Any]    ,					lowerCAmelCase__ :     str			):
				__a           =			index  # the number when this node is seen
				__a           =			index  # lowest rank node reachable from here
				index += 1
				stack.append(lowerCAmelCase__			)
				__a           =			True

				for w in g[v]:
						if index_of[w] == -1:
								__a           =			strong_connect(lowerCAmelCase__    ,					lowerCAmelCase__    ,					lowerCAmelCase__			)
								__a           =			(
								    lowlink_of[w] if lowlink_of[w] < lowlink_of[v] else lowlink_of[v]
								)
						elif on_stack[w]:
								__a           =			(
								    lowlink_of[w] if lowlink_of[w] < lowlink_of[v] else lowlink_of[v]
								)

				if lowlink_of[v] == index_of[v]:
						__a           =			[]
						__a           =			stack.pop()
						__a           =			False
						component.append(lowerCAmelCase__			)
						while w != v:
								__a           =			stack.pop()
								__a           =			False
								component.append(lowerCAmelCase__			)
						components.append(lowerCAmelCase__			)
				return index

		__a           =			[]
		for v in range(lowerCAmelCase__			):
				if index_of[v] == -1:
						strong_connect(lowerCAmelCase__    ,					0    ,					lowerCAmelCase__			)

		return components

def        lowercase							(		lowerCAmelCase__ :     str    ,					lowerCAmelCase__ :     Union[str, Any]			) ->      Optional[int]:
		__a           =			[[] for _ in range(lowerCAmelCase__			)]
		for u, v in edges:
				g[u].append(lowerCAmelCase__			)
		return g


if __name__ == "__main__":
				# Test
				lowercase_			     =  7
				lowercase_			     =  [0, 0, 1, 2, 3, 3, 4, 4, 6]
				lowercase_			     =  [1, 3, 2, 0, 1, 4, 5, 6, 5]
				lowercase_			     =  [(u, v) for u, v in zip(source, target)]
				lowercase_			     =  create_graph(n_vertices, edges)

				assert [[5], [6], [4], [3, 2, 1, 0]] == tarjan(g)










"""simple docstring"""




from dataclasses import dataclass, field
from typing import TYPE_CHECKING, Any, ClassVar, Dict, List, Optional, Union

import pyarrow as pa


if TYPE_CHECKING:
				from .features import FeatureType
@dataclass
class 					__lowerCAmelCase					:


		'''simple docstring'''



		__UpperCAmelCase		:			List[str]
		__UpperCAmelCase		:			Optional[str]										=				None
		# Automatically constructed
		__UpperCAmelCase		:			ClassVar[str]										=				"dict"
		__UpperCAmelCase		:			ClassVar[Any]										=				None
		__UpperCAmelCase		:			str										=				field(default='Translation'     ,			init=__SCREAMING_SNAKE_CASE     ,			repr=__SCREAMING_SNAKE_CASE       )

		def __call__(  self      ):
				return pa.struct({lang: pa.string() for lang in sorted(self.languages      )}      )





		def 			__UpperCAmelCase       (  self      ):
				from .features import Value

				return {k: Value('''string'''      ) for k in sorted(self.languages      )}







@dataclass
class 					__lowerCAmelCase					:


		'''simple docstring'''



		__UpperCAmelCase		:			Optional[List]										=				None
		__UpperCAmelCase		:			Optional[int]										=				None
		__UpperCAmelCase		:			Optional[str]										=				None
		# Automatically constructed
		__UpperCAmelCase		:			ClassVar[str]										=				"dict"
		__UpperCAmelCase		:			ClassVar[Any]										=				None
		__UpperCAmelCase		:			str										=				field(default='TranslationVariableLanguages'     ,			init=__SCREAMING_SNAKE_CASE     ,			repr=__SCREAMING_SNAKE_CASE       )

		def 			__UpperCAmelCase       (  self      ):
				__a           =			sorted(set(self.languages      )      ) if self.languages else None
				__a           =			len(self.languages      ) if self.languages else None

		def __call__(  self      ):
				return pa.struct({'''language''': pa.list_(pa.string()      ), '''translation''': pa.list_(pa.string()      )}      )

		def 			__UpperCAmelCase       (  self							, _a      ):
				__a           =			set(self.languages      )
				if self.languages and set(_a      ) - lang_set:
						raise ValueError(
						    f'''Some languages in example ({', '.join(sorted(set(_a      ) - lang_set      )      )}) are not in valid set ({', '.join(_a      )}).'''      )

				# Convert dictionary into tuples, splitting out cases where there are
				# multiple translations for a single language.
				__a           =			[]
				for lang, text in translation_dict.items():
						if isinstance(_a							, _a      ):
								translation_tuples.append((lang, text)      )
						else:
								translation_tuples.extend([(lang, el) for el in text]      )

        # Ensure translations are in ascending order by language code.
				__a      ,     __a           =			zip(*sorted(_a      )      )

				return {"language": languages, "translation": translations}





		def 			__UpperCAmelCase       (  self      ):
				from .features import Sequence, Value

				return {
				    "language": Sequence(Value('''string'''      )      ),
				    "translation": Sequence(Value('''string'''      )      ),
				}






