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In your childhood, do you crazy for collecting the beautiful cards in the snacks? They said that, for example, if you collect all the 108 people in th 阅读全文
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Consider a single-elimination football tournament involving 2n teams, denoted 1, 2, …, 2n. In each round of the tournament, all teams still in the tou 阅读全文
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Organizing a programming contest is not an easy job. To avoid making the problems too difficult, the organizer usually expect the contest result satis 阅读全文
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dp求期望的题。 题意： 有n个房间，由n-1条隧道连通起来，实际上就形成了一棵树， 从结点1出发，开始走，在每个结点i都有3种可能： 1.被杀死，回到结点1处（概率为ki） 2.找到出口，走出迷宫 （概率为ei） 3.和该点相连有m条边，随机走一条 求：走出迷宫所要走的边数的期望值。 设 E[i]表示在结... 阅读全文
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Hzz loves aeroplane chess very much. The chess map contains N+1 grids labeled from 0 to N. Hzz starts at grid 0. For each step he throws a dice(a dice 阅读全文
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Akemi Homura is a Mahou Shoujo (Puella Magi/Magical Girl). Homura wants to help her friend Madoka save the world. But because of the plot of the Boss 阅读全文
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Scout YYF I YYF is a couragous scout. Now he is on a dangerous mission which is to penetrate into the enemy's base. After overcoming a series difficul 阅读全文
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Collecting Bugs Ivan is fond of collecting. Unlike other people who collect post stamps, coins or other material stuff, he collects software bugs. Whe 阅读全文
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【bzoj4008】[HNOI2015]亚瑟王 2015年4月22日3,2991 Description 小 K 不慎被 LL 邪教洗脑了，洗脑程度深到他甚至想要从亚瑟王邪教中脱坑。 他决定，在脱坑之前，最后再来打一盘亚瑟王。既然是最后一战，就一定要打得漂 亮。众所周知，亚瑟王是一个看脸的游戏，技能 阅读全文
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前天晚上，玩三国杀，玩到了昨天凌晨2点40多分吧，我觉得初赛要爆炸了， 不得不吐槽一下，三国杀的武将太少了。 昨天是初赛的日子，上午8点多来了后看了看阅读程序和程序填空，复习了以下理论知识和wsj 然后去看了看试场，发现我坐在hjq左边，前左是田野（对就是那个大佬）后左是zyd，大家已经 开始幻想着 阅读全文