2019年5月17日
HDU - 2196（树形DP）
摘要： 题目： A school bought the first computer some time ago(so this computer's id is 1). During the recent years the school bought N-1 new computers. Each ne 阅读全文
posted @ 2019-05-17 00:34 丿不落良辰 阅读(244) 评论(0) 推荐(0) 编辑