collatz

def collatz(number):
    checked_number = number
    table = []
    while number != 1:
        if number % 2 == 0:
            number = number / 2
        else:
            number = 3 * number + 1
        print(int(number))
        table.append(int(number))
        max_value = None
        max_idx = None

        for idx, num in enumerate(table):
            if (max_value is None or num > max_value):
                max_value = num
                max_idx = idx

    print('You checked number:', checked_number)
    print('Maximum value:', max_value, "at place:", max_idx + 1)
    print('Number of iterations:', len(table)) 


def main():
    choice = input()
    if choice.isnumeric():
        number = int(choice)
        collatz(number)
    else:
        print('Wrong choice, try again..')
        main()
    
main()