首先 热烈庆祝"CSP-S 2020全国开放赛前冲刺模拟训练题1"圆满结束!!! 感谢大毒瘤周指导的题目.题目还是很不错的,部分分设置的也比较合理,各种神仙随便 \(\text{AK}\) ,蒟蒻只能大呼 \(\text{NB}\) . Problem A 这是一道数学题. 根据周指导的题解中说明,这是一道数竞题目,但是由于我们是信竞,所以直接打一个暴力然后大胆的猜想一下就可以了. 发现这个数只能是 \(130\) . 具体证明贴一下: Problem B 这是一道神笔题. 我在考场上…

首先 热烈庆祝"CSP-S 2020全国开放赛前冲刺模拟训练题2"圆满结束!!! 感谢大毒瘤颗粒囊的题目.题目还是很不错的,部分分设置的不合理,各种神仙随便 AK ,蒟蒻只能爆零. Problem A 不会,下一个. 暴搜代码如下: #include<bits/stdc++.h> using namespace std; struct Num{int a,b;}; Num opt[25]; int l1,r1,l2,r2,cnt; int dfs(int now,int a…

题目描述: 你有一个1到N的排列P1,P2,P3...PN,还有M对数(x1,y1),(x2,y2),....,(xM,yM),现在你可以选取任意对数,每对数可以选取任意次,然后对选择的某对数(xi,yi)进行操作,操作方式为交换xi,yi两个位置的数.最终你想要Pi=i的位置尽可能多.输出最多可以有多少个这样的位置 输入格式: 第一行输入一个整数N,第二行输入一个整数M 接下来M行每行输入一对数xi,yi 输出格式: 输出一个整数 样例输入1: 5 2 5 3 1 4 2 1 3 5 4 样例…

[contest 781] 9.6 - XJOI czx的温暖题... T1 军训…

[contest 782] 9.7 - XJOI 个人觉得温暖题啊,,,可是卡毛空间呀!!! T1 传送…

    Programming Contest Problem Types Hal Burch conducted an analysis over spring break of 1999 and made an amazing discovery: there are only 16 types of programming contest problems! Furthermore, the top several comprise almost 80% of the problems s…

Area of Mushroom Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 2390    Accepted Submission(s): 578 Problem Description Teacher Mai has a kingdom with the infinite area. He has n students guard…

Differencia Time Limit: 10000/10000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 601    Accepted Submission(s): 173 Problem Description Professor Zhang has two sequences a1,a2,...,an and b1,b2,...,bn. He wants to…

Rigid Frameworks Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 337    Accepted Submission(s): 273 Problem Description Erik Demaine is a Professor in Computer Science at the Massachusetts Insti…

题目链接: Coding Contest Time Limit: 2000/1000 MS (Java/Others)     Memory Limit: 65536/65536 K (Java/Others) Problem Description A coding contest will be held in this university, in a huge playground. The whole playground would be divided into N blocks,…