


"""simple docstring"""
from __future__ import annotations

__SCREAMING_SNAKE_CASE							:      List[str]						=      8.9_88E9  # units = N * m^s * C^-2







def   _a			( _SCREAMING_SNAKE_CASE			,	_SCREAMING_SNAKE_CASE			,	_SCREAMING_SNAKE_CASE			,	_SCREAMING_SNAKE_CASE			)      ->			dict[str, float]:
							snake_case_          =						abs(chargea * chargea			)

							if (force, chargea, chargea, distance).count(0			) != 1:
														raise ValueError("""One and only one argument must be 0"""			)
							if distance < 0:
														raise ValueError("""Distance cannot be negative"""			)
							if force == 0:
														snake_case_          =						COULOMBS_CONSTANT * charge_product / (distance**2)
														return {"force": force}
							elif chargea == 0:
														snake_case_          =						abs(_SCREAMING_SNAKE_CASE			) * (distance**2) / (COULOMBS_CONSTANT * chargea)
														return {"charge1": chargea}
							elif chargea == 0:
														snake_case_          =						abs(_SCREAMING_SNAKE_CASE			) * (distance**2) / (COULOMBS_CONSTANT * chargea)
														return {"charge2": chargea}
							elif distance == 0:
														snake_case_          =						(COULOMBS_CONSTANT * charge_product / abs(_SCREAMING_SNAKE_CASE			)) ** 0.5
														return {"distance": distance}
							raise ValueError("""Exactly one argument must be 0"""			)


if __name__ == "__main__":
				import doctest

				doctest.testmod()







"""simple docstring"""
from __future__ import annotations

from collections.abc import Iterator





class        __A       :





							'''simple docstring'''

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



														"""simple docstring"""



														snake_case_          =						value
														snake_case_          =						None
														snake_case_          =						None





class        __A       :





							'''simple docstring'''

							def __init__(			self							: List[Any]						,    UpperCAmelCase_							: Node    )   ->None:



														"""simple docstring"""



														snake_case_          =						tree



							def 						lowerCAmelCase    (			self							: List[str]						,    UpperCAmelCase_							: 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							: str    )   ->Iterator[int]:



														"""simple docstring"""



														yield self.depth_first_search(self.tree    )


if __name__ == "__main__":
				import doctest

				doctest.testmod()



