2014年8月7日
stars
摘要： B -StarsTime Limit:1000MSMemory Limit:32768KB64bit IO Format:%I64d & %I64uSubmitStatusDescriptionAstronomers often examine star maps where stars are r... 阅读全文
posted @ 2014-08-07 20:32 冷夏的博客园 阅读(244) 评论(0) 推荐(0) 编辑
Following Orders(拓扑排序)
摘要： DescriptionOrder is an important concept in mathematics and in computer science. For example, Zorn's Lemma states: ``a partially ordered set in which ... 阅读全文
posted @ 2014-08-07 10:54 冷夏的博客园 阅读(354) 评论(0) 推荐(0) 编辑