fcfs

 def findWaitingTime(processes, n, bt, wt):

    wt[0] = 0

    for i in range(1, n):

        wt[i] = bt[i - 1] + wt[i - 1]

def findTurnAroundTime(processes, n, bt, wt, tat):

    for i in range(n):

        tat[i] = bt[i] + wt[i]

def findavgTime(processes, n, bt):

    wt = [0] * n

    tat = [0] * n

    total_wt = 0

    total_tat = 0

    findWaitingTime(processes, n, bt, wt)

    findTurnAroundTime(processes, n, bt, wt, tat)

    print("Process\tBurst time\tWaiting time\tTurnaround time")

    for i in range(n):

        total_wt += wt[i]

        total_tat += tat[i]

        print(f"{processes[i]}\t\t{bt[i]}\t\t{wt[i]}\t\t{tat[i]}")

    print("Average Turnaround Time =", total_tat / n)

if __name__ == "__main__":

    processes = [1, 2, 3]

    n = len(processes)

    burst_time = [10, 5, 8]

    findavgTime(processes, n, burst_time)