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Yixght is a manager of the company called SzqNetwork(SN). Now she's very worried because she has just received a bad news which denotes that DxtNetwor 阅读全文
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You may have heard that no two snowflakes are alike. Your task is to write a program to determine whether this is really true. Your program will read 阅读全文
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Word ss of length nn is called kk -complete if ss is a palindrome, i.e. si=sn+1−isi=sn+1−i for all 1≤i≤n1≤i≤n ; ss has a period of kk , i.e. si=sk+isi 阅读全文
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A positive integer is called composite if it can be represented as a product of two positive integers, both greater than 11 . For example, the followi 阅读全文
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Alice has a cute cat. To keep her cat fit, Alice wants to design an exercising walk for her cat! Initially, Alice's cat is located in a cell (x,y)(x,y 阅读全文
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You are given a rooted tree consisting of nn vertices numbered from 11 to nn . The root of the tree is a vertex number 11 . A tree is a connected undi 阅读全文
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题目描述 Farmer John 计划建造 NNN 个农场，用 N−1N-1N−1 条道路连接，构成一棵树（也就是说，所有农场之间都互相可以到达，并且没有环）。每个农场有一头奶牛，品种为更赛牛或荷斯坦牛之一。 Farmer John 的 MMM 个朋友经常前来拜访他。在朋友 iii 拜访之时，Far 阅读全文
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There are n houses in the village and some bidirectional roads connecting them. Every day peole always like to ask like this "How far is it if I want 阅读全文
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卡了巨长时间，照着别人的博客总算一点一点改对了TAT，对树形分组背包模板改写一下，有时间的话再补细节。 参考博客：https://blog.csdn.net/qq_40531479/article/details/103211677?depth_1-utm_source=distribute.pc_ 阅读全文
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题目描述 小A的工作不仅繁琐，更有苛刻的规定，要求小A每天早上在6：00之前到达公司，否则这个月工资清零。可是小A偏偏又有赖床的坏毛病。于是为了保住自己的工资，小A买了一个十分牛B的空间跑路器，每秒钟可以跑2^k千米（k是任意自然数）。当然，这个机器是用longint存的，所以总跑路长度不能超过ma 阅读全文