



from __future__ import annotations



class 							lowerCAmelCase_						:
       def __init__(     self,     SCREAMING_SNAKE_CASE_ = 0			)	->						Union[str, Any]:
          UpperCamelCase       :    int		      =      key
       def    snake_case_			(     self,     SCREAMING_SNAKE_CASE_,     SCREAMING_SNAKE_CASE_			)	->						Tuple:
          assert isinstance(__lowerCamelCase,     __lowerCamelCase			) and isinstance(__lowerCamelCase,     __lowerCamelCase			)

          UpperCamelCase       :    str		      =      key or self.__key or 1

          # make sure key is an appropriate size
          key %= 255

          return [chr(ord(__lowerCamelCase			) ^ key			) for ch in content]
       def    snake_case_			(     self,     SCREAMING_SNAKE_CASE_,     SCREAMING_SNAKE_CASE_			)	->						str:
          assert isinstance(__lowerCamelCase,     __lowerCamelCase			) and isinstance(__lowerCamelCase,     __lowerCamelCase			)

          UpperCamelCase       :    Union[str, Any]		      =      key or self.__key or 1

          # make sure key is an appropriate size
          key %= 255

          return [chr(ord(__lowerCamelCase			) ^ key			) for ch in content]
       def    snake_case_			(     self,     SCREAMING_SNAKE_CASE_,     SCREAMING_SNAKE_CASE_ = 0			)	->						str:
          assert isinstance(__lowerCamelCase,     __lowerCamelCase			) and isinstance(__lowerCamelCase,     __lowerCamelCase			)

          UpperCamelCase       :    int		      =      key or self.__key or 1

          # make sure key can be any size
          while key > 255:
             key -= 255

          # This will be returned
          UpperCamelCase       :    List[Any]		      =      ''''''

          for ch in content:
             ans += chr(ord(__lowerCamelCase			) ^ key			)

          return ans
       def    snake_case_			(     self,     SCREAMING_SNAKE_CASE_,     SCREAMING_SNAKE_CASE_ = 0			)	->						Tuple:
          assert isinstance(__lowerCamelCase,     __lowerCamelCase			) and isinstance(__lowerCamelCase,     __lowerCamelCase			)

          UpperCamelCase       :    List[str]		      =      key or self.__key or 1

          # make sure key can be any size
          while key > 255:
             key -= 255

          # This will be returned
          UpperCamelCase       :    Optional[Any]		      =      ''''''

          for ch in content:
             ans += chr(ord(__lowerCamelCase			) ^ key			)

          return ans
       def    snake_case_			(     self,     SCREAMING_SNAKE_CASE_,     SCREAMING_SNAKE_CASE_ = 0			)	->						Optional[int]:
          assert isinstance(__lowerCamelCase,     __lowerCamelCase			) and isinstance(__lowerCamelCase,     __lowerCamelCase			)

          try:
             with open(__lowerCamelCase			) as fin, open('encrypt.out',     'w+'			) as fout:
                # actual encrypt-process
                for line in fin:
                   fout.write(self.encrypt_string(__lowerCamelCase,     __lowerCamelCase			)			)

          except OSError:
             return False

          return True






       def    snake_case_			(     self,     SCREAMING_SNAKE_CASE_,     SCREAMING_SNAKE_CASE_			)	->						Tuple:
          assert isinstance(__lowerCamelCase,     __lowerCamelCase			) and isinstance(__lowerCamelCase,     __lowerCamelCase			)

          try:
             with open(__lowerCamelCase			) as fin, open('decrypt.out',     'w+'			) as fout:
                # actual encrypt-process
                for line in fin:
                   fout.write(self.decrypt_string(__lowerCamelCase,     __lowerCamelCase			)			)

          except OSError:
             return False

          return True


# Tests
# crypt = XORCipher()
# key = 67

# # test encrypt
# print(crypt.encrypt("hallo welt",key))
# # test decrypt
# print(crypt.decrypt(crypt.encrypt("hallo welt",key), key))

# # test encrypt_string
# print(crypt.encrypt_string("hallo welt",key))

# # test decrypt_string
# print(crypt.decrypt_string(crypt.encrypt_string("hallo welt",key),key))

# if (crypt.encrypt_file("test.txt",key)):
#       print("encrypt successful")
# else:
#       print("encrypt unsuccessful")

# if (crypt.decrypt_file("encrypt.out",key)):
#       print("decrypt successful")
# else:
#       print("decrypt unsuccessful")







'''simple docstring'''





from functools import reduce

__lowerCamelCase												=						(
    '''73167176531330624919225119674426574742355349194934'''
    '''96983520312774506326239578318016984801869478851843'''
    '''85861560789112949495459501737958331952853208805511'''
    '''12540698747158523863050715693290963295227443043557'''
    '''66896648950445244523161731856403098711121722383113'''
    '''62229893423380308135336276614282806444486645238749'''
    '''30358907296290491560440772390713810515859307960866'''
    '''70172427121883998797908792274921901699720888093776'''
    '''65727333001053367881220235421809751254540594752243'''
    '''52584907711670556013604839586446706324415722155397'''
    '''53697817977846174064955149290862569321978468622482'''
    '''83972241375657056057490261407972968652414535100474'''
    '''82166370484403199890008895243450658541227588666881'''
    '''16427171479924442928230863465674813919123162824586'''
    '''17866458359124566529476545682848912883142607690042'''
    '''24219022671055626321111109370544217506941658960408'''
    '''07198403850962455444362981230987879927244284909188'''
    '''84580156166097919133875499200524063689912560717606'''
    '''05886116467109405077541002256983155200055935729725'''
    '''71636269561882670428252483600823257530420752963450'''
)


def        a__     (					UpperCamelCase_						:      str = N						):
   return max(
       # mypy cannot properly interpret reduce
       int(reduce(lambda UpperCamelCase_,   UpperCamelCase_						: str(int(UpperCamelCase_						) * int(UpperCamelCase_						)						),   n[i : i + 13]						)						)
       for i in range(len(UpperCamelCase_						) - 12						)						)


if __name__ == "__main__":
    print(F'''{solution() = }''')



