



"""simple docstring"""






def 	snake_case_  (				A_ :		int = 10_00						):


       '''simple docstring'''





       _lowerCamelCase      ,   _lowerCamelCase						:    Optional[Any]         =			1, 1
       _lowerCamelCase						:    int         =			2
       while True:
              _lowerCamelCase						:    Tuple         =			0
              _lowerCamelCase						:    List[str]         =			fa + fa
              _lowerCamelCase      ,   _lowerCamelCase						:    Union[str, Any]         =			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 	snake_case_  (				A_ :		float						):


       '''simple docstring'''





       if edge <= 0 or not isinstance(A_,    A_						):
              raise ValueError('''Length must be a positive.'''						)
       return 3 * ((25 + 10 * (5 ** (1 / 2))) ** (1 / 2)) * (edge**2)






def 	snake_case_  (				A_ :		float						):


       '''simple docstring'''





       if edge <= 0 or not isinstance(A_,    A_						):
              raise ValueError('''Length must be a positive.'''						)
       return ((15 + (7 * (5 ** (1 / 2)))) / 4) * (edge**3)


if __name__ == "__main__":
   import doctest

   doctest.testmod()


