




'''simple docstring'''






from __future__ import annotations

import sys
from collections import deque
from typing import Generic, TypeVar

A_			      =		TypeVar("T")






class        lowercase_      (						Generic[T]							):
     A_											=			42  # Cache store of keys
     A_											=			42  # References of the keys in cache
     A_											=			1_0  # Maximum capacity of cache





     def __init__(     self     :					int     ,							__lowerCamelCase     :					int			):
           snake_case__       :   Optional[int]	      =    deque()
           snake_case__       :   List[Any]	      =    set()
           if not n:
                 snake_case__       :   Tuple	      =    sys.maxsize
           elif n < 0:
                 raise ValueError('n should be an integer greater than 0.'			)
           else:
                 snake_case__       :   Union[str, Any]	      =    n





     def 			_lowerCAmelCase      (     self     :					List[Any]     ,							__lowerCamelCase     :					T			):
           if x not in self.key_reference:
                 if len(self.dq_store			) == LRUCache._MAX_CAPACITY:
                       snake_case__       :   str	      =    self.dq_store.pop()
                       self.key_reference.remove(__lowerCamelCase			)
           else:
                 self.dq_store.remove(__lowerCamelCase			)

           self.dq_store.appendleft(__lowerCamelCase			)
           self.key_reference.add(__lowerCamelCase			)





     def 			_lowerCAmelCase      (     self     :					Union[str, Any]			):
           for k in self.dq_store:
                 print(__lowerCamelCase			)





     def __repr__(     self     :					str			):
           return F"LRUCache({self._MAX_CAPACITY}) => {list(self.dq_store			)}"


if __name__ == "__main__":
      import doctest

      doctest.testmod()

      A_			      =		LRUCache(4)
      lru_cache.refer("A")
      lru_cache.refer(2)
      lru_cache.refer(3)
      lru_cache.refer("A")
      lru_cache.refer(4)
      lru_cache.refer(5)
      lru_cache.display()

      print(lru_cache)
      assert str(lru_cache) == "LRUCache(4) => [5, 4, 'A', 3]"






'''simple docstring'''






from math import pi






def 		UpperCamelCase__      (		__SCREAMING_SNAKE_CASE				,      __SCREAMING_SNAKE_CASE		)    ->   float:
      return 2 * pi * radius * (angle / 360)


if __name__ == "__main__":
      print(arc_length(90, 10))
