
'''simple docstring'''





from __future__ import annotations

def   snake_case_       (							_a     :							list[int]			):
      snake_case_						       =							[0] * len(lowercase_			)
      for i in range(1 ,					len(lowercase_			)			):
            snake_case_						       =							duration_times[i - 1] + waiting_times[i - 1]
      return waiting_times

def   snake_case_       (							_a     :							list[int] ,					_a     :							list[int]			):
      return [
          duration_time + waiting_times[i]
          for i, duration_time in enumerate(lowercase_			)
      ]

def   snake_case_       (							_a     :							list[int]			):
      return sum(lowercase_			) / len(lowercase_			)

def   snake_case_       (							_a     :							list[int]			):
      return sum(lowercase_			) / len(lowercase_			)


if __name__ == "__main__":
     # process id's
     A           =   [1, 2, 3]

     # ensure that we actually have processes
     if len(processes) == 0:
          print("Zero amount of processes")
          raise SystemExit(0)

     # duration time of all processes
     A           =   [1_9, 8, 9]

     # ensure we can match each id to a duration time
     if len(duration_times) != len(processes):
          print("Unable to match all id\'s with their duration time")
          raise SystemExit(0)

     # get the waiting times and the turnaround times
     A           =   calculate_waiting_times(duration_times)
     A           =   calculate_turnaround_times(duration_times, waiting_times)

     # get the average times
     A           =   calculate_average_waiting_time(waiting_times)
     A           =   calculate_average_turnaround_time(turnaround_times)

     # print all the results
     print("Process ID\tDuration Time\tWaiting Time\tTurnaround Time")
     for i, process in enumerate(processes):
          print(
              F"""{process}\t\t{duration_times[i]}\t\t{waiting_times[i]}\t\t"""
              F"""{turnaround_times[i]}"""
          )
     print(F"""Average waiting time = {average_waiting_time}""")
     print(F"""Average turn around time = {average_turnaround_time}""")



'''simple docstring'''





def   snake_case_       (							_a     :							List[str] ,					_a     :							List[str]			):
      snake_case_						       =							1
      while b > 0:
            if b & 1:
                  res *= a

            a *= a
            b >>= 1

      return res
def   snake_case_       (							_a     :							Union[str, Any] ,					_a     :							Tuple ,					_a     :							Optional[Any]			):
      snake_case_						       =							1
      while b > 0:
            if b & 1:
                  snake_case_						       =							((res % c) * (a % c)) % c

            a *= a
            b >>= 1

      return res

