



from collections.abc import Iterator, MutableMapping
from dataclasses import dataclass
from typing import Generic, TypeVar

_lowercase  				=    TypeVar('''KEY''')
_lowercase  				=    TypeVar('''VAL''')
@dataclass(frozen=lowerCamelCase__       ,			slots=lowerCamelCase__   )
class 					__A       (			Generic[KEY, VAL]   ):
			UpperCamelCase       :KEY
			UpperCamelCase       :VAL







class 					__A       (			_Item   ):





			def __init__(self					):
						super().__init__(snake_case__				,     snake_case__					)





			def __bool__(self					):
						return False







_lowercase  				=    _DeletedItem()
class 					__A       (			MutableMapping[KEY, VAL]   ):





			def __init__(self				,     __magic_name__ = 8				,     __magic_name__ = 0.75					):
						lowerCamelCase__			:   Dict										=		initial_block_size
						lowerCamelCase__			:   list[_Item | None]										=		[None] * initial_block_size
						assert 0.0 < capacity_factor < 1.0
						lowerCamelCase__			:   Optional[int]										=		capacity_factor
						lowerCamelCase__			:   Union[str, Any]										=		0





			def 							_snake_case     (self				,     __magic_name__					):
						return hash(snake_case__					) % len(self._buckets					)





			def 							_snake_case     (self				,     __magic_name__					):
						return (ind + 1) % len(self._buckets					)





			def 							_snake_case     (self				,     __magic_name__				,     __magic_name__				,     __magic_name__					):
						lowerCamelCase__			:   Optional[int]										=		self._buckets[ind]
						if not stored:
									lowerCamelCase__			:   List[str]										=		_Item(snake_case__				,     snake_case__					)
									self._len += 1
									return True
						elif stored.key == key:
									lowerCamelCase__			:   Tuple										=		_Item(snake_case__				,     snake_case__					)
									return True
						else:
									return False





			def 							_snake_case     (self					):
						lowerCamelCase__			:   Optional[int]										=		len(self._buckets					) * self._capacity_factor
						return len(self					) >= int(snake_case__					)





			def 							_snake_case     (self					):
						if len(self._buckets					) <= self._initial_block_size:
									return False
						lowerCamelCase__			:   str										=		len(self._buckets					) * self._capacity_factor / 2
						return len(self					) < limit





			def 							_snake_case     (self				,     __magic_name__					):
						lowerCamelCase__			:   List[str]										=		self._buckets
						lowerCamelCase__			:   int										=		[None] * new_size
						lowerCamelCase__			:   str										=		0
						for item in old_buckets:
									if item:
												self._add_item(item.key				,     item.val					)





			def 							_snake_case     (self					):
						self._resize(len(self._buckets					) * 2					)





			def 							_snake_case     (self					):
						self._resize(len(self._buckets					) // 2					)





			def 							_snake_case     (self				,     __magic_name__					):
						lowerCamelCase__			:   Optional[Any]										=		self._get_bucket_index(snake_case__					)
						for _ in range(len(self._buckets					)					):
									yield ind
									lowerCamelCase__			:   int										=		self._get_next_ind(snake_case__					)





			def 							_snake_case     (self				,     __magic_name__				,     __magic_name__					):
						for ind in self._iterate_buckets(snake_case__					):
									if self._try_set(snake_case__				,     snake_case__				,     snake_case__					):
												break





			def __setitem__(self				,     __magic_name__				,     __magic_name__					):
						if self._is_full():
									self._size_up()

						self._add_item(snake_case__				,     snake_case__					)





			def __delitem__(self				,     __magic_name__					):
						for ind in self._iterate_buckets(snake_case__					):
									lowerCamelCase__			:   Optional[int]										=		self._buckets[ind]
									if item is None:
												raise KeyError(snake_case__					)
									if item is _deleted:
												continue
									if item.key == key:
												lowerCamelCase__			:   Dict										=		_deleted
												self._len -= 1
												break
						if self._is_sparse():
									self._size_down()





			def __getitem__(self				,     __magic_name__					):
						for ind in self._iterate_buckets(snake_case__					):
									lowerCamelCase__			:   Optional[int]										=		self._buckets[ind]
									if item is None:
												break
									if item is _deleted:
												continue
									if item.key == key:
												return item.val
						raise KeyError(snake_case__					)





			def __len__(self					):
						return self._len





			def __iter__(self					):
						yield from (item.key for item in self._buckets if item)





			def __repr__(self					):
						lowerCamelCase__			:   Dict										=		""" ,""".join(
						    f"{item.key}: {item.val}" for item in self._buckets if item					)
						return f"HashMap({val_string})"










UpperCAmelCase_							=				{"""a""": ["""c""", """b"""], """b""": ["""d""", """e"""], """c""": [], """d""": [], """e""": []}
UpperCAmelCase_							=				["""a""", """b""", """c""", """d""", """e"""]





def  __magic_name__  (				lowercase				,       lowercase				,       lowercase				)				-> Union[str, Any]:

							"""simple docstring"""



							lowercase_	:   Tuple  				=     start
							# add current to visited
							visited.append(lowercase				)
							lowercase_	:   Any  				=     edges[current]
							for neighbor in neighbors:
														# if neighbor not in visited, visit
														if neighbor not in visited:
																					lowercase_	:   List[str]  				=     topological_sort(lowercase				,       lowercase				,       lowercase				)
    # if all neighbors visited add current to sort
							sort.append(lowercase				)
							# if all vertices haven't been visited select a new one to visit
							if len(lowercase				) != len(lowercase				):
														for vertice in vertices:
																					if vertice not in visited:
																												lowercase_	:   Optional[Any]  				=     topological_sort(lowercase				,       lowercase				,       lowercase				)
    # return sort
							return sort


if __name__ == "__main__":
							UpperCAmelCase_							=				topological_sort("""a""", [], [])
							print(sort)