






def   SCREAMING_SNAKE_CASE__						(   snake_case_ = 9_9_8_0_0_1  )   ->  Optional[int]:


 """simple docstring"""



 a		=			0
 for i in range(9_9_9,  9_9,  -1  ):  # 3 digit numbers range from 999 down to 100
  for j in range(9_9_9,  9_9,  -1  ):
   a		=			str(i * j  )
   if product_string == product_string[::-1] and i * j < n:
    a		=			max(lowercase_,  i * j  )
 return answer


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













def   SCREAMING_SNAKE_CASE__						(   snake_case_  )   ->  int:


	"""simple docstring"""



	return n * (2 * n - 1)





def   SCREAMING_SNAKE_CASE__						(   snake_case_  )   ->  bool:


	"""simple docstring"""



	a		=			(1 + 2_4 * n) ** 0.5
	return ((1 + root) / 6) % 1 == 0





def   SCREAMING_SNAKE_CASE__						(   snake_case_ = 1_4_4  )   ->  int:


	"""simple docstring"""



	a		=			start
	a		=			hexagonal_num(snake_case_  )
	while not is_pentagonal(snake_case_  ):
		n += 1
		a		=			hexagonal_num(snake_case_  )
	return num


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





