






def 		SCREAMING_SNAKE_CASE							(					__lowerCAmelCase = 1000			) ->	int:
     UpperCamelCase__			:   str       				=  2**power
     UpperCamelCase__			:   Union[str, Any]       				=  0
     while n:
          UpperCamelCase__				,     UpperCamelCase__			:   int       				=  r + n % 10, n // 10
     return r


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







import numpy as np







def 		SCREAMING_SNAKE_CASE							(					__lowerCAmelCase			) ->	np.array:
     return 1 / (1 + np.exp(-vector			))







def 		SCREAMING_SNAKE_CASE							(					__lowerCAmelCase			) ->	np.array:
     return vector * sigmoid(1.7_0_2 * vector			)


if __name__ == "__main__":
 import doctest

 doctest.testmod()