12. Integer to Roman
摘要：
Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 阅读全文
posted @ 2016-04-08 22:55 joannae 阅读(160) 评论(0) 推荐(0) 编辑
11. Container With Most Water(头尾双指针）
摘要：
Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpo 阅读全文
posted @ 2016-04-08 15:29 joannae 阅读(202) 评论(0) 推荐(0) 编辑
10. Regular Expression Matching
摘要：
Implement regular expression matching with support for '.' and '*'. 思路：在出现*的时候，因为可能出现0，1，2，...次，所以要使用到带回溯的递归 阅读全文
posted @ 2016-04-08 06:34 joannae 阅读(116) 评论(0) 推荐(0) 编辑
