20. Valid Parentheses(用栈实现括号匹配)
摘要：
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: No 阅读全文
posted @ 2019-05-13 22:14 shaer 阅读(104) 评论(0) 推荐(1) 编辑
