2014年10月25日
LeetCode Count and Say
摘要： The count-and-say sequence is the sequence of integers beginning as follows:1, 11, 21, 1211, 111221, ...1is read off as"one 1"or11.11is read off as"tw... 阅读全文
posted @ 2014-10-25 15:18 birdhack 阅读(115) 评论(0) 推荐(0)
LeetCode Valid Parentheses
摘要： Given a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must close in the correct ... 阅读全文
posted @ 2014-10-25 13:04 birdhack 阅读(96) 评论(0) 推荐(0)