2019年7月28日
Sorting It All Out (拓扑排序+思维)
摘要： An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from smallest to large 阅读全文
posted @ 2019-07-28 22:35 black_hole6 阅读(279) 评论(0) 推荐(0)
Roads in the North （树的直径）
摘要： Building and maintaining roads among communities in the far North is an expensive business. With this in mind, the roads are build such that there is 阅读全文
posted @ 2019-07-28 11:32 black_hole6 阅读(306) 评论(0) 推荐(0)