


from math import ceil






def 	__lowerCAmelCase   (SCREAMING_SNAKE_CASE = 1001 )->  int:




      """simple docstring"""

      snake_case_	=				1

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

      return total


if __name__ == "__main__":
   import sys

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



import os






def 	__lowerCAmelCase   ()->  List[Any]:




      """simple docstring"""

      snake_case_	=				os.path.join(os.path.dirname(SCREAMING_SNAKE_CASE ) , '''num.txt''' )
      with open(SCREAMING_SNAKE_CASE ) as file_hand:
            return str(sum(int(SCREAMING_SNAKE_CASE ) for line in file_hand ) )[:10]


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