



'''simple docstring'''





import math

lowercase_									=    10
lowercase_									=    7
lowercase_									=    BALLS_PER_COLOUR * NUM_COLOURS




def lowerCAmelCase    (__A = 20):



     """simple docstring"""



     _a           =    math.comb(__A    ,      __A)
     _a           =    math.comb(NUM_BALLS - BALLS_PER_COLOUR    ,      __A)

     _a           =    NUM_COLOURS * (1 - missing_colour / total)

     return F'''{result:.9f}'''


if __name__ == "__main__":
  print(solution(20))




'''simple docstring'''






from __future__ import annotations





def  _SCREAMING_SNAKE_CASE		(      __snake_case							:			int | str				):
     _A    		=  str(__snake_case				)
     return n == n[::-1]





def  _SCREAMING_SNAKE_CASE		(      __snake_case							:			int = 1_0_0_0_0_0_0				):
     _A    		=  0

     for i in range(1   ,		__snake_case				):
          if is_palindrome(__snake_case				) and is_palindrome(bin(__snake_case				).split('b'				)[1]				):
               total += i
     return total


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



