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Description 人的一生不仅要靠自我奋斗，还要考虑到历史的行程。 历史的行程可以抽象成一个 01 串，作为一个年纪比较大的人，你希望从历史的行程中获得一些姿势。 你发现在历史的不同时刻，不断的有相同的事情发生。比如，有两个人同时在世纪之交 11 年的时候上台，同样喜欢与洋人谈笑风生，同样提出 阅读全文
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Description One day, Takahashi was given the following problem from Aoki: You are given a tree with N vertices and an integer K. The vertices are numb 阅读全文
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Description Snuke loves colorful balls. He has a total of N*K balls, K in each of his favorite N colors. The colors are numbered 1 through N.He will a 阅读全文
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Description Description Description Description Artsem is on vacation and wants to buy souvenirs for his two teammates. There are n souvenir shops alo 阅读全文
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Description Miceren likes playing with brackets. There are N brackets on his desk forming a sequence. In his spare time, he will do Q operations on th 阅读全文
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Description As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math tasks to practice. There is one of t 阅读全文
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原题链接 Description Description Ember和Storm正在玩游戏。首先，Ember构造一棵n个节点且每个节点度数不超过d的带节点编号的树T。然后，Storm选择两个不同的节点u和v，并写下从u到v路径上的节点编号，记为序列 a1, a2... ak 。最后，Ember在序列 阅读全文