摘要：时间限制:10000ms单点时限:1000ms内存限制:256MB描述Rowdark是一个邪恶的魔法师。在他阅读大巫术师Lich的传记时，他发现一类黑魔法来召唤远古生物，鱼丸。魔法n能召唤类型i鱼丸当且仅当i能够被表示为x xor n*x对于某个正整数x和固定的n。Rowdark想知道类型为[L,R... 阅读全文

摘要：时间限制:6000ms单点时限:1000ms内存限制:256MB描述你在赌场里玩梭哈，已经被发了4张牌，现在你想要知道发下一张牌后你得到顺子的概率是多少？假定赌场使用的是一副牌，四种花色的A、2、3、...、J、Q、K共52张，这副牌只发给你了4张，你的剩下一张牌从剩下48张中任意取出一张。顺子指的... 阅读全文

摘要：Problem DescriptionMemphis loves xor very musch.Now he gets an array A.The length of A is n.Now he wants to know the sum of all (lowbit(Ai xor Aj) (i,... 阅读全文

摘要：DescriptionAssuming a finite – radius “ball” which is on an N dimension is cut with a “knife” of N-1 dimension. How many pieces will the “ball” be cut... 阅读全文

摘要：DescriptionPog and Szh are playing games.There is a sequence with $n$ numbers, Pog will choose a number A from the sequence. Szh will choose an anothe... 阅读全文

摘要：DescriptionFat brother and Maze are playing a kind of special (hentai) game in the playground. (Maybe it’s the OOXX game which decrypted in the last p... 阅读全文