
"""simple docstring"""
from __future__ import annotations

from collections.abc import Iterator
from typing import Any
class       lowerCAmelCase_		:



							'''simple docstring'''





							def __init__( self    ,				snake_case_				)       ->  Optional[Any]:
													__lowerCAmelCase     =  data
													__lowerCAmelCase     =  None
class       lowerCAmelCase_		:



							'''simple docstring'''





							def __init__( self				)       ->  Tuple:
													__lowerCAmelCase     =  None
													__lowerCAmelCase     =  None




							def __iter__( self				)       ->  Iterator[Any]:
													__lowerCAmelCase     =  self.head
													while self.head:
																			yield node.data
																			__lowerCAmelCase     =  node.next
																			if node == self.head:
																									break




							def __len__( self				)       ->  int:
													return sum(1 for _ in self				)




							def __repr__( self				)       ->  List[Any]:
													return "->".join(str(snake_case_				) for item in iter(self				)				)




							def    A__						( self    ,				snake_case_				)       ->  None:
													self.insert_nth(len(self				)    ,				snake_case_				)




							def    A__						( self    ,				snake_case_				)       ->  None:
													self.insert_nth(0    ,				snake_case_				)




							def    A__						( self    ,				snake_case_    ,				snake_case_				)       ->  None:
													if index < 0 or index > len(self				):
																			raise IndexError("""list index out of range."""				)
													__lowerCAmelCase     =  Node(snake_case_				)
													if self.head is None:
																			__lowerCAmelCase     =  new_node  # first node points itself
																			__lowerCAmelCase     =  __lowerCAmelCase     =  new_node
													elif index == 0:  # insert at head
																			__lowerCAmelCase     =  self.head
																			__lowerCAmelCase     =  __lowerCAmelCase     =  new_node
													else:
																			__lowerCAmelCase     =  self.head
																			for _ in range(index - 1				):
																									__lowerCAmelCase     =  temp.next
																			__lowerCAmelCase     =  temp.next
																			__lowerCAmelCase     =  new_node
																			if index == len(self				) - 1:  # insert at tail
																									__lowerCAmelCase     =  new_node




							def    A__						( self				)       ->  Tuple:
													return self.delete_nth(0				)




							def    A__						( self				)       ->  Any:
													return self.delete_nth(len(self				) - 1				)




							def    A__						( self    ,				snake_case_ = 0				)       ->  Any:
													if not 0 <= index < len(self				):
																			raise IndexError("""list index out of range."""				)
													__lowerCAmelCase     =  self.head
													if self.head == self.tail:  # just one node
																			__lowerCAmelCase     =  __lowerCAmelCase     =  None
													elif index == 0:  # delete head node
																			__lowerCAmelCase     =  self.tail.next.next
																			__lowerCAmelCase     =  self.head.next
													else:
																			__lowerCAmelCase     =  self.head
																			for _ in range(index - 1				):
																									__lowerCAmelCase     =  temp.next
																			__lowerCAmelCase     =  temp.next
																			__lowerCAmelCase     =  temp.next.next
																			if index == len(self				) - 1:  # delete at tail
																									__lowerCAmelCase     =  temp
													return delete_node.data




							def    A__						( self				)       ->  bool:
													return len(self				) == 0

def  lowercase     ():
						__lowerCAmelCase     =  CircularLinkedList()
						assert len(_lowerCAmelCase						) == 0
						assert circular_linked_list.is_empty() is True
						assert str(_lowerCAmelCase						) == ""

						try:
												circular_linked_list.delete_front()
												raise AssertionError  # This should not happen
						except IndexError:
												assert True  # This should happen

						try:
												circular_linked_list.delete_tail()
												raise AssertionError  # This should not happen
						except IndexError:
												assert True  # This should happen

						try:
												circular_linked_list.delete_nth(-1						)
												raise AssertionError
						except IndexError:
												assert True

						try:
												circular_linked_list.delete_nth(0						)
												raise AssertionError
						except IndexError:
												assert True

						assert circular_linked_list.is_empty() is True
						for i in range(5						):
												assert len(_lowerCAmelCase						) == i
												circular_linked_list.insert_nth(_lowerCAmelCase ,    i + 1						)
						assert str(_lowerCAmelCase						) == "->".join(str(_lowerCAmelCase						) for i in range(1 ,    6						)						)

						circular_linked_list.insert_tail(6						)
						assert str(_lowerCAmelCase						) == "->".join(str(_lowerCAmelCase						) for i in range(1 ,    7						)						)
						circular_linked_list.insert_head(0						)
						assert str(_lowerCAmelCase						) == "->".join(str(_lowerCAmelCase						) for i in range(0 ,    7						)						)

						assert circular_linked_list.delete_front() == 0
						assert circular_linked_list.delete_tail() == 6
						assert str(_lowerCAmelCase						) == "->".join(str(_lowerCAmelCase						) for i in range(1 ,    6						)						)
						assert circular_linked_list.delete_nth(2						) == 3

						circular_linked_list.insert_nth(2 ,    3						)
						assert str(_lowerCAmelCase						) == "->".join(str(_lowerCAmelCase						) for i in range(1 ,    6						)						)

						assert circular_linked_list.is_empty() is False


if __name__ == "__main__":
			import doctest

			doctest.testmod()


"""simple docstring"""
from __future__ import annotations

from statistics import mean

def  lowercase     (_lowerCAmelCase ,    _lowerCAmelCase ,    _lowerCAmelCase						):
						__lowerCAmelCase     =  [0] * no_of_processes
						__lowerCAmelCase     =  [0] * no_of_processes

						# Initialize remaining_time to waiting_time.

						for i in range(_lowerCAmelCase						):
												__lowerCAmelCase     =  burst_time[i]
						__lowerCAmelCase     =  []

						__lowerCAmelCase     =  0
						__lowerCAmelCase     =  0

						# When processes are not completed,
						# A process whose arrival time has passed \
						# and has remaining execution time is put into the ready_process.
						# The shortest process in the ready_process, target_process is executed.

						while completed != no_of_processes:
												__lowerCAmelCase     =  []
												__lowerCAmelCase     =  -1

												for i in range(_lowerCAmelCase						):
																		if (arrival_time[i] <= total_time) and (remaining_time[i] > 0):
																								ready_process.append(_lowerCAmelCase						)

												if len(_lowerCAmelCase						) > 0:
																		__lowerCAmelCase     =  ready_process[0]
																		for i in ready_process:
																								if remaining_time[i] < remaining_time[target_process]:
																														__lowerCAmelCase     =  i
																		total_time += burst_time[target_process]
																		completed += 1
																		__lowerCAmelCase     =  0
																		__lowerCAmelCase     =  (
																		    total_time - arrival_time[target_process] - burst_time[target_process]
																		)
												else:
																		total_time += 1

						return waiting_time

def  lowercase     (_lowerCAmelCase ,    _lowerCAmelCase ,    _lowerCAmelCase						):
						__lowerCAmelCase     =  [0] * no_of_processes
						for i in range(_lowerCAmelCase						):
												__lowerCAmelCase     =  burst_time[i] + waiting_time[i]
						return turn_around_time


if __name__ == "__main__":
			print('''[TEST CASE 01]''')

			SCREAMING_SNAKE_CASE_					     =	4
			SCREAMING_SNAKE_CASE_					     =	[2, 5, 3, 7]
			SCREAMING_SNAKE_CASE_					     =	[0, 0, 0, 0]
			SCREAMING_SNAKE_CASE_					     =	calculate_waitingtime(arrival_time, burst_time, no_of_processes)
			SCREAMING_SNAKE_CASE_					     =	calculate_turnaroundtime(
			    burst_time, no_of_processes, waiting_time
			)

			# Printing the Result
			print('''PID\tBurst Time\tArrival Time\tWaiting Time\tTurnaround Time''')
			for i, process_id in enumerate(list(range(1, 5))):
						print(
						    F"{process_id}\t{burst_time[i]}\t\t\t{arrival_time[i]}\t\t\t\t"
						    F"{waiting_time[i]}\t\t\t\t{turn_around_time[i]}"
						)
			print(F"\nAverage waiting time = {mean(waiting_time):.5f}")
			print(F"Average turnaround time = {mean(turn_around_time):.5f}")
