


"""simple docstring"""






from __future__ import annotations

from collections.abc import Iterator



class     A__     :




	'''simple docstring'''





	def __init__(  self:	Any ,    _SCREAMING_SNAKE_CASE:	int)       -> None:

				"""simple docstring"""

				__lowerCAmelCase   :						Optional[Any]				= value
				__lowerCAmelCase   :						Node | None				= None
				__lowerCAmelCase   :						Node | None				= None






class     A__     :




	'''simple docstring'''





	def __init__(  self:	Union[str, Any] ,    _SCREAMING_SNAKE_CASE:	Node)       -> None:

				"""simple docstring"""

				__lowerCAmelCase   :						Tuple				= tree

	def 							_SCREAMING_SNAKE_CASE     (  self:	List[str] ,    _SCREAMING_SNAKE_CASE:	Node | None)       -> int:

				"""simple docstring"""

				if node is None:
							return 0
				return node.value + (
				    self.depth_first_search(node.left) + self.depth_first_search(node.right)
				)







	def __iter__(  self:	Union[str, Any])       -> Iterator[int]:

				"""simple docstring"""

				yield self.depth_first_search(self.tree)


if __name__ == "__main__":
	import doctest

	doctest.testmod()




"""simple docstring"""






import re

from filelock import FileLock


try:
	import nltk

	__snake_case							:     Any   =					True
except (ImportError, ModuleNotFoundError):
	__snake_case							:     Optional[int]   =					False

if NLTK_AVAILABLE:
	with FileLock('.lock') as lock:
		nltk.download('punkt', quiet=True)


def     _lowercase       (						__snake_case			)		->     str:
			re.sub("<n>"      ,""      ,__snake_case			)  # remove pegasus newline char
			assert NLTK_AVAILABLE, "nltk must be installed to separate newlines between sentences. (pip install nltk)"
			return "\n".join(nltk.sent_tokenize(__snake_case			)			)