

'''simple docstring'''
def 	_lowerCAmelCase (						_UpperCamelCase						:					Optional[Any] = 10_00    )				->      int:
     """simple docstring"""




     _SCREAMING_SNAKE_CASE   ,						_SCREAMING_SNAKE_CASE							   =1, 1
     _SCREAMING_SNAKE_CASE							   =2
     while True:
          _SCREAMING_SNAKE_CASE							   =0
          _SCREAMING_SNAKE_CASE							   =fa + fa
          _SCREAMING_SNAKE_CASE   ,						_SCREAMING_SNAKE_CASE							   =fa, f
          index += 1
          for _ in str(a__    ):
               i += 1
          if i == n:
               break
     return index


if __name__ == "__main__":
   print(solution(int(str(input()).strip())))



'''simple docstring'''
def 	_lowerCAmelCase (						_UpperCamelCase						:					float							,			_UpperCamelCase						:					float    )				->      float:
     """simple docstring"""




     if mass < 0:
          raise ValueError('The mass of a body cannot be negative'    )
     return 0.5 * mass * abs(_UpperCamelCase    ) * abs(_UpperCamelCase    )


if __name__ == "__main__":
     import doctest

     doctest.testmod(verbose=True)
