





'''simple docstring'''




lowercase__    :      List[Any]						=    9.80665






def        _lowerCAmelCase			(  __snake_case  : float ,							__snake_case  : float ,							__snake_case  : float = g			)     ->     Union[str, Any]:



     if fluid_density <= 0:
          raise ValueError('Impossible fluid density'			)
     if volume < 0:
          raise ValueError('Impossible Object volume'			)
     if gravity <= 0:
          raise ValueError('Impossible Gravity'			)

     return fluid_density * gravity * volume


if __name__ == "__main__":
  import doctest

  # run doctest
  doctest.testmod()





def 			_SCREAMING_SNAKE_CASE			(							lowercase	:       int = 10_00     ):


      '''simple docstring'''



      lowerCamelCase_		     =    2**power
      lowerCamelCase_		     =    0
      while n:
            lowerCamelCase_     ,				lowerCamelCase_		     =    r + n % 10, n // 10
      return r


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



