class Solution:    def plusOne(self, digits):    """    :type digits: List[int]    :rtype: List[int]     """    s = ''    for i in digits:  # 转化成字符串        s += str(i)    s = int(s) + 1        return [int(x) for x in str(s)]q = Solution()l1 = [9]l2 = [1, 2, 9]l3 = [1, 9, 9]l4 = [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9]print(q.plusOne(l1))print(q.plusOne(l2))print(q.plusOne(l3))print(q.plusOne(l4)) 结果：

[1, 0]

[1, 3, 0]

[2, 0, 0]

[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]