摘要: Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telepho 阅读全文
posted @ 2016-05-27 19:31 32ddd 阅读(426) 评论(0) 推荐(0) 编辑
摘要: 四数和问题,感觉并不是最优解。 阅读全文
posted @ 2016-05-27 17:39 32ddd 阅读(259) 评论(0) 推荐(0) 编辑