





'''simple docstring'''


from numpy import exp, pi, sqrt
def 							UpperCAmelCase_  (						__lowerCamelCase					:					List[Any]	,__lowerCamelCase					:					float = 0.0	,__lowerCamelCase					:					float = 1.0 ):
   return 1 / sqrt(2 * pi * sigma**2 ) * exp(-((x - mu) ** 2) / (2 * sigma**2) )


if __name__ == "__main__":
 import doctest

 doctest.testmod()









'''simple docstring'''


def 							UpperCAmelCase_  (						__lowerCamelCase					:					int = 10_00 ):
   lowercase_			,							lowercase_			:str    			= 1, 1
   lowercase_			:Any    			= 2
   while True:
      lowercase_			:str    			= 0
      lowercase_			:Tuple    			= fa + fa
      lowercase_			,							lowercase_			:Tuple    			= fa, f
      index += 1
      for _ in str(__lowerCamelCase ):
         i += 1
      if i == n:
         break
   return index


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


