


from __future__ import annotations

from collections.abc import Iterator


class     lowercase__  :






		def __init__(					self      :					int		,						_lowercase      :					int ):




									"""simple docstring"""







									UpperCAmelCase__										=     value
									UpperCAmelCase__										=     None
									UpperCAmelCase__										=     None




class     lowercase__  :






		def __init__(					self      :					int		,						_lowercase      :					Node ):




									"""simple docstring"""







									UpperCAmelCase__										=     tree






		def 			_UpperCAmelCase  (					self      :					str		,						_lowercase      :					Node | None ):




									"""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 ):




									"""simple docstring"""







									yield self.depth_first_search(self.tree )


if __name__ == "__main__":
				import doctest

				doctest.testmod()









from __future__ import annotations





def __UpperCAmelCase       (		__A ,						__A ,						__A ,						)						->					tuple:



       '''simple docstring'''





       if (electron_conc, hole_conc, intrinsic_conc).count(0			) != 1:
              raise ValueError("You cannot supply more or less than 2 values"			)
       elif electron_conc < 0:
              raise ValueError("Electron concentration cannot be negative in a semiconductor"			)
       elif hole_conc < 0:
              raise ValueError("Hole concentration cannot be negative in a semiconductor"			)
       elif intrinsic_conc < 0:
              raise ValueError(
                  "Intrinsic concentration cannot be negative in a semiconductor"			)
       elif electron_conc == 0:
              return (
                  "electron_conc",
                  intrinsic_conc**2 / hole_conc,
              )
       elif hole_conc == 0:
              return (
                  "hole_conc",
                  intrinsic_conc**2 / electron_conc,
              )
       elif intrinsic_conc == 0:
              return (
                  "intrinsic_conc",
                  (electron_conc * hole_conc) ** 0.5,
              )
       else:
              return (-1, -1)


if __name__ == "__main__":
    import doctest

    doctest.testmod()





