随笔分类 -  容斥

UPC10582: Cowpatibility
摘要：题目描述 It turns out there is one factor that matters far more than any other when determining whether two cows are compatible as potential friends: whet 阅读全文
posted @ 2019-02-28 19:28 Albert_liu 阅读(297) 评论(0) 推荐(0)