



"""simple docstring"""





from __future__ import annotations

from typing import Any
class 				lowercase__       (   SCREAMING_SNAKE_CASE				):







       '''simple docstring'''


       pass



class 				lowercase__       :







       '''simple docstring'''


       def __init__(							self      :  int		,    _UpperCAmelCase      :  Any   )			->						None:


             '''simple docstring'''




             UpperCAmelCase_      			=							data
             UpperCAmelCase_      			=							None



       def __iter__(							self      :  List[Any]   )			->						Tuple:


             '''simple docstring'''




             UpperCAmelCase_      			=							self
             UpperCAmelCase_      			=							[]
             while node:
                   if node in visited:
                         raise ContainsLoopError
                   visited.append(_UpperCAmelCase   )
                   yield node.data
                   UpperCAmelCase_      			=							node.next_node







       @property
       def 					lowercase__    (							self      :  Optional[Any]   )			->						bool:


             '''simple docstring'''




             try:
                   list(self   )
                   return False
             except ContainsLoopError:
                   return True


if __name__ == "__main__":
  lowerCamelCase       	=						Node(1)
  lowerCamelCase       	=						Node(2)
  lowerCamelCase       	=						Node(3)
  lowerCamelCase       	=						Node(4)
  print(root_node.has_loop)  # False
  lowerCamelCase       	=						root_node.next_node
  print(root_node.has_loop)  # True

  lowerCamelCase       	=						Node(5)
  lowerCamelCase       	=						Node(6)
  lowerCamelCase       	=						Node(5)
  lowerCamelCase       	=						Node(6)
  print(root_node.has_loop)  # False

  lowerCamelCase       	=						Node(1)
  print(root_node.has_loop)  # False









"""simple docstring"""





def        a__     (				lowerCAmelCase__ = 2000000				):
      UpperCAmelCase_      			=							[0 for i in range(n + 1				)]
      UpperCAmelCase_      			=							1
      UpperCAmelCase_      			=							1

      for i in range(2     ,      int(n**0.5				) + 1				):
            if primality_list[i] == 0:
                  for j in range(i * i     ,      n + 1     ,      lowerCAmelCase__				):
                        UpperCAmelCase_      			=							1
      UpperCAmelCase_      			=							0
      for i in range(lowerCAmelCase__				):
            if primality_list[i] == 0:
                  sum_of_primes += i
      return sum_of_primes


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




