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Colder-Hotter Statements This is an interactive problem. Egor and Petr are playing a game called «Colder-Hotter» on a 2D plane. At the beginning of th 阅读全文
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The Battle of Chibi Cao Cao made up a big army and was going to invade the whole South China. Yu Zhou was worried about it. He thought the only way to 阅读全文
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Find an element in hidden array There is an array of length N consisting of non-negative integers. The array is sorted in non-decreasing order. Each n 阅读全文
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String Given a string S and two integers L and M, we consider a substring of S as “recoverable” if and only if (i) It is of length M*L; (ii) It can be 阅读全文
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Partial Tree In mathematics, and more specifically in graph theory, a tree is an undirected graph in which any two nodes are connected by exactly one 阅读全文
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Decoding of Varints Statements Varint is a type used to serializing integers using one or more bytes. The key idea is to have smaller values being enc 阅读全文
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Brackets We give the following inductive definition of a “regular brackets” sequence: the empty sequence is a regular brackets sequence, if s is a reg 阅读全文
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Recursive sequence Farmer John likes to play mathematics games with his N cows. Recently, they are attracted by recursive sequences. In each turn, the 阅读全文
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题目4 : 80 Days 题目4 : 80 Days 时间限制:1000ms 单点时限:1000ms 内存限制:256MB 描述 80 Days is an interesting game based on Jules Verne's science fiction "Around the Wo 阅读全文