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Adera是Microsoft应用商店中的一款解谜游戏。 异象石是进入Adera中异时空的引导物，在Adera的异时空中有一张地图。 这张地图上有N个点，有N-1条双向边把它们连通起来。 起初地图上没有任何异象石，在接下来的M个时刻中，每个时刻会发生以下三种类型的事件之一： 地图的某个点上出现了异象 阅读全文
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Eugene likes working with arrays. And today he needs your help in solving one challenging task. An array cc is a subarray of an array bb if cc can be 阅读全文
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Once again, Boris needs the help of Anton in creating a task. This time Anton needs to solve the following problem: There are two arrays of integers a 阅读全文
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Young boy Artem tries to paint a picture, and he asks his mother Medina to help him. Medina is very busy, that's why she asked for your help. Artem wa 阅读全文
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题目描述 松鼠的新家是一棵树，前几天刚刚装修了新家，新家有nnn 个房间，并且有 n−1n-1n−1 根树枝连接，每个房间都可以相互到达，且俩个房间之间的路线都是唯一的。天哪，他居然真的住在“树”上。 松鼠想邀请****前来参观，并且还指定一份参观指南，他希望**能够按照他的指南顺序，先去 a1a_ 阅读全文
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链接：https://ac.nowcoder.com/acm/contest/549/C来源：牛客网 题目描述 小A最近开始沉迷买彩票，并且希望能够通过买彩票发家致富。已知购买一张彩票需要3元，而彩票中奖的金额分别为1,2,3,4元，并且比较独特的是这个彩票中奖的各种金额都是等可能的。现在小A连续购 阅读全文
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Dreamoon likes coloring cells very much. There is a row of nn cells. Initially, all cells are empty (don't contain any color). Cells are numbered from 阅读全文
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The sequence of mm integers is called the permutation if it contains all integers from 11 to mm exactly once. The number mm is called the length of th 阅读全文
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Dreamoon is a big fan of the Codeforces contests. One day, he claimed that he will collect all the places from 11 to 5454 after two more rated contest 阅读全文
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题目描述 Farmer John has installed a new system of N−1N-1N−1 pipes to transport milk between the NNN stalls in his barn (2≤N≤50,0002 \leq N \leq 50,0002≤N 阅读全文