




from math import ceil







def 			lowerCamelCase_		(       UpperCamelCase__				:      int = 1001      )     ->       int:





				"""simple docstring"""


				__lowerCamelCase		       =    1

				for i in range(1 ,     int(ceil(n / 2.0      )      )      ):
								__lowerCamelCase		       =    2 * i + 1
								__lowerCamelCase		       =    2 * i
								__lowerCamelCase		       =    total + 4 * odd**2 - 6 * even

				return total


if __name__ == "__main__":
					import sys

					if len(sys.argv) == 1:
										print(solution())
					else:
										try:
															__A        =    int(sys.argv[1])
															print(solution(n))
										except ValueError:
															print("Invalid entry - please enter a number")








class     __lowerCAmelCase :

			"""simple docstring"""







			def __init__(      self			,						lowerCamelCase__							)    ->      Any:



							'''simple docstring'''
							__lowerCamelCase		       =    n
							__lowerCamelCase		       =    [None] * self.n
							__lowerCamelCase		       =    0  # index of the first element
							__lowerCamelCase		       =    0
							__lowerCamelCase		       =    0


			def __len__(      self							)    ->      int:



							'''simple docstring'''
							return self.size


			def       lowercase_    (      self							)    ->      bool:



							'''simple docstring'''
							return self.size == 0


			def       lowercase_    (      self							)    ->      str:



							'''simple docstring'''
							return False if self.is_empty() else self.array[self.front]


			def       lowercase_    (      self			,						lowerCamelCase__							)    ->      Optional[Any]:



							'''simple docstring'''
							if self.size >= self.n:
											raise Exception('QUEUE IS FULL'							)

							__lowerCamelCase		       =    data
							__lowerCamelCase		       =    (self.rear + 1) % self.n
							self.size += 1
							return self






			def       lowercase_    (      self							)    ->      Tuple:



							'''simple docstring'''
							if self.size == 0:
											raise Exception('UNDERFLOW'							)

							__lowerCamelCase		       =    self.array[self.front]
							__lowerCamelCase		       =    None
							__lowerCamelCase		       =    (self.front + 1) % self.n
							self.size -= 1
							return temp


