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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