





from __future__ import annotations

from statistics import mean




def  lowerCAmelCase_ (							UpperCamelCase_					,		UpperCamelCase_					,		UpperCamelCase_  )     ->		list[int]:
       UpperCamelCase_          =  [0] * no_of_processes
       UpperCamelCase_          =  [0] * no_of_processes

       # Initialize remaining_time to waiting_time.

       for i in range(UpperCamelCase_  ):
              UpperCamelCase_          =  burst_time[i]
       UpperCamelCase_          =  []

       UpperCamelCase_          =  0
       UpperCamelCase_          =  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:
              UpperCamelCase_          =  []
              UpperCamelCase_          =  -1

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

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

       return waiting_time




def  lowerCAmelCase_ (							UpperCamelCase_					,		UpperCamelCase_					,		UpperCamelCase_  )     ->		list[int]:
       UpperCamelCase_          =  [0] * no_of_processes
       for i in range(UpperCamelCase_  ):
              UpperCamelCase_          =  burst_time[i] + waiting_time[i]
       return turn_around_time


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

     _UpperCAmelCase        =				4
     _UpperCAmelCase        =				[2, 5, 3, 7]
     _UpperCAmelCase        =				[0, 0, 0, 0]
     _UpperCAmelCase        =				calculate_waitingtime(arrival_time, burst_time, no_of_processes)
     _UpperCAmelCase        =				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}''')








_UpperCAmelCase        =				{
    'a': 'AAAAA',
    'b': 'AAAAB',
    'c': 'AAABA',
    'd': 'AAABB',
    'e': 'AABAA',
    'f': 'AABAB',
    'g': 'AABBA',
    'h': 'AABBB',
    'i': 'ABAAA',
    'j': 'BBBAA',
    'k': 'ABAAB',
    'l': 'ABABA',
    'm': 'ABABB',
    'n': 'ABBAA',
    'o': 'ABBAB',
    'p': 'ABBBA',
    'q': 'ABBBB',
    'r': 'BAAAA',
    's': 'BAAAB',
    't': 'BAABA',
    'u': 'BAABB',
    'v': 'BBBAB',
    'w': 'BABAA',
    'x': 'BABAB',
    'y': 'BABBA',
    'z': 'BABBB',
    ' ': ' ',
}


_UpperCAmelCase        =				{value: key for key, value in encode_dict.items()}




def  lowerCAmelCase_ (							UpperCamelCase_  )     ->		str:
       UpperCamelCase_          =  ""
       for letter in word.lower():
              if letter.isalpha() or letter == " ":
                     encoded += encode_dict[letter]
              else:
                     raise Exception("encode() accepts only letters of the alphabet and spaces"  )
       return encoded




def  lowerCAmelCase_ (							UpperCamelCase_  )     ->		str:
       if set(UpperCamelCase_  ) - {"A", "B", " "} != set():
              raise Exception("decode() accepts only 'A', 'B' and spaces"  )
       UpperCamelCase_          =  ""
       for word in coded.split():
              while len(UpperCamelCase_  ) != 0:
                     decoded += decode_dict[word[:5]]
                     UpperCamelCase_          =  word[5:]
              decoded += " "
       return decoded.strip()


if __name__ == "__main__":
     from doctest import testmod

     testmod()

