def compare_num(x, y):

    max_length = max([len(str(x)), len(str(y))])

    for i in range(max_length):

        x_bit = None

        y_bit = None

        if len(str(x)) > i:

            x_bit = str(x)[i]

        if len(str(y)) > i:

            y_bit = str(y)[i]

        if x_bit and y_bit:

            if x_bit > y_bit:

                return 1

            elif x_bit < y_bit:

                return -1

    return 0

if __name__ == '__main__':

    # 核心思想是冒泡排序 和 按位比较

    numbers = [499, 55, 54, 540, 6, 99, 9966]

    numbers = [str(n) for n in numbers]

    for i in range(len(numbers)):

        print(f'第{i+1}轮')

        for j in range(0, len(numbers)-i-1):

            first = numbers[j]

            second = numbers[j+1]

            if compare_num(first, second) == -1:

                numbers[j], numbers[j+1] = numbers[j+1], numbers[j]

    print(numbers)

    print(''.join(numbers))