2018年12月7日
22. Generate Parentheses - Medium
摘要： Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given n = 3, a solution set is: M 阅读全文
posted @ 2018-12-07 12:12 fatttcat 阅读(140) 评论(0) 推荐(0)
489. Robot Room Cleaner - Hard
摘要： Given a robot cleaner in a room modeled as a grid. Each cell in the grid can be empty or blocked. The robot cleaner with 4 given APIs can move forward 阅读全文
posted @ 2018-12-07 08:47 fatttcat 阅读(155) 评论(0) 推荐(0)