from time import time_ns
n = 3 #max random number will be (2^n)

def randomNumber(maxN):
    num = time_ns()
    num = int(format(num, '0127b'), base=2)
    array=[]
    for i in range(16000):
        array.append(num & 1)
        new = (num ^ (num >> 1) ^ (num >> 2)^(num >> 7)) & 1
        num = (num >> 1) | (new << 127)

    i=0
    while True:
        j = "".join([str(x) for x in array[-15-i:-1-i]])
        index = int(j,2)
        if index < len(array):
            break
        else:
            i+=1

    rnum = int("".join([str(x) for x in array[index-maxN:index]]),2)
    return rnum+1

if __name__=="__main__":
    paper_num=randomNumber(n)
    question_num=randomNumber(n)
    print(f"Next exercise is question {question_num} from paper {paper_num}")