leetcode 66到底是什么意思？

66题的Plus One，我题目看了几遍还是没懂。求各位能帮忙解释一下题目意思吗？最好举个具体例子（输入一个数，应该输出什么？）

This kind of candidates who do not understand the question will get offers from FLAG.
Luck matters !

[9,9,9] + 1 = [1,0,0,0]  [7,8,8] +1 = [7,8,9] 返回新的vector

KnightKK 发表于 2017-8-15 01:03
[9,9,9] + 1 = [1,0,0,0]  [7,8,8] +1 = [7,8,9] 返回新的vector

好的, 谢谢啦