摘要：
这道题其实让我意识到了我的英文水平还有待加强。。。。题目如下：Given a non-negative number represented as an array of digits, plus one to the number.The digits are stored such that t... 阅读全文
摘要：
这道题leetcode上面写着是DP问题，问题是我一开始写了个简单的递归结果直接超时，所以没办法只好拿迭代来做了。题目如下： You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct w... 阅读全文