




from __future__ import annotations



def       UpperCAmelCase__  (     lowerCamelCase,			lowerCamelCase,			lowerCamelCase,			):
  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()









from abc import ABC, abstractmethod
from argparse import ArgumentParser




class    __lowerCAmelCase       (							lowerCAmelCase):






       @staticmethod
       @abstractmethod
       def 					SCREAMING_SNAKE_CASE    (   _lowerCAmelCase:					ArgumentParser				):
         raise NotImplementedError()






       @abstractmethod
       def 					SCREAMING_SNAKE_CASE    (   self:					List[str]				):
         raise NotImplementedError()



