链接 构造矩阵 快速幂求解 构造矩阵a[i]为每个cati所拥有的花生总数 这里多加一维用来求和,具体是怎么求得可以看下面的一组例子 假设有3个cat a[] = {1,0,0,0} 构造单位矩阵来保存操作后的解 为什么要是单位矩阵?因为单位矩阵乘以任何矩阵还是原矩阵 这样在单位矩阵上改变要操作的那列(这里用列来表示i只猫的花生数)就能保留下来不被改变的猫的 花生数 对于g 1 (1,0,0,0)*{1,1,0,0 0,1,0,0 0,0,1,0 0,0,0,1} 这样得出结果(1,1,0,0}…

矩阵快速幂,主要是考构造.另外,swap总是写龊? 为什么?干脆放弃了.唉,我太难了. 思路:操作e和s都很好想,主要是g操作 我们可以额外空出一位,记为1,每次要加1,就对这个额外的1进行计算即可 不妨定义A=[1 0 0 ... 0],此时只要构造一组操作的等效矩阵T就好了 就是添一位使初始矩阵A变为一个n+1元组,编号为0到n.以三只猫为例[1 0 0 0] #include <cstdio> typedef long long ll; ; int n,m,k;ll t; struct…

在前面的几篇关于Free编程的讨论示范中我们均使用了基础类型的运算结果.但在实际应用中因为需要考虑运算中出现异常的情况,常常会需要到更高阶复杂的运算结果类型如Option.Xor等.因为Monad无法实现组合(monad do not compose),我们如何在for-comprehension中组合这些运算呢?假如在我们上一篇讨论里的示范DSL是这样的: trait Login[+A] case class Authenticate(uid: String, pwd: String) ext…

在上一节我们讨论了通过Coproduct来实现DSL组合:用一些功能简单的基础DSL组合成符合大型多复杂功能应用的DSL.但是我们发现:cats在处理多层递归Coproduct结构时会出现编译问题.再就是Free编程是一个繁复的工作,容易出错,造成编程效率的低下.由于Free编程目前是函数式编程的主要方式(我个人认为),我们必须克服Free编程的效率问题.通过尝试,发现freeK可以作为一个很好的Free编程工具.freeK是个开源的泛函组件库,我们会在这次讨论里用freeK来完成上次讨论中以失…

上篇我们介绍了Free类型可以作为一种嵌入式编程语言DSL在函数式编程中对某种特定功能需求进行描述.一个完整的应用可能会涉及多样的关联功能,但如果我们为每个应用都设计一套DSL的话,那么在我们的函数式编程中将会不断重复的功能相似的DSL.我们应该秉承函数式编程的核心思想:函数组合(compositionality)来实现DSL的组合:把DSL拆解成最基础语句ADT,然后用这些ADT来组合成适合应用功能要求的完整DSL.我们还是使用上篇那个Interact DSL,这次再增加一个Login功能:…

cats是scala的一个新的函数式编程工具库,其设计原理基本继承了scalaz:大家都是haskell typeclass的scala版实现.当然,cats在scalaz的基础上从实现细节.库组织结构和调用方式上进行了一些优化,所以对用户来说:cats的基础数据类型.数据结构在功能上与scalaz是大致相同的,可能有一些语法上的变化.与scalaz著名抽象.复杂的语法表现形式相比,cats的语法可能更形象.简单直白.在scalaz的学习过程中,我们了解到所谓函数式编程就是monadic Pro…

题目传送门 /* 题意:k次操作,g:i猫+1, e:i猫eat,s:swap 矩阵快速幂:写个转置矩阵,将k次操作写在第0行,定义A = {1,0, 0, 0...}除了第一个外其他是猫的初始值 自己讲太麻烦了,网上有人讲的很清楚,膜拜之 详细解释:http://www.cppblog.com/y346491470/articles/157284.html */ #include <cstdio> #include <cstring> #include <cmath>…

The Cats' Feeding Spots Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://hihocoder.com/contest/acmicpc2015beijingonline/problem/1 Description In Yan Yuan, the Peking University campus, there are many homeless cats. They all live happy lives because…

Training little cats Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 9613   Accepted: 2296 Description Facer's pet cat just gave birth to a brood of little cats. Having considered the health of those lovely cats, Facer decides to make th…

Zxr960115 is owner of a large farm. He feeds m cute cats and employs p feeders. There's a straight road across the farm and n hills along the road, numbered from 1 to n from left to right. The distance between hill i and (i - 1) is di meters. The fee…

Training little cats Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 9299   Accepted: 2230 Description Facer's pet cat just gave birth to a brood of little cats. Having considered the health of those lovely cats, Facer decides to make th…

原文地址:https://mysqlserverteam.com/contention-aware-transaction-scheduling-arriving-in-innodb-to-boost-performance/原文作者: Sunny Bains, Jiamin Huang (University of Michigan)译者:沈刚 什么是事务调度? 目前大多数的数据库系统都是通过锁的方式来控制并发的情况.但是对于很多数据库厂商来说,都会有一个问题: 当有多个事务同时需要获取同一把…

1609:[例 4]Cats Transport 时间限制: 1000 ms         内存限制: 524288 KB sol:非常偷懒的截图了事 注意:只能猫等人,不能人等猫 对于每只猫,我们可以得到一个数字 Cost[i] 表示Dis[H[i]]-T[i],表示在Cost[i]时刻出发刚好不用等(如果出发时间小于Cost[i],就会错过,反之则需要等待) 显然Cost需要排序 那么每个饲养员一定是掌管一段连续的Cost,直接dp是p*m2的,所以用斜率优化,非常套路 推出若 k<l<…

When Becky Evans started studying cat-human relationships, she kept hearing, over and over again, about how cats are psychopaths.On one hand, anyone who has looked into the curiously blank face of a catloaf knows exactly what that means. But also, ex…

Description There are many homeless cats in PKU campus. They are all happy because the students in the cat club of PKU take good care of them. Li lei is one of the members of the cat club. He loves those cats very much. Last week, he won a scholarshi…

Training little cats Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 10737   Accepted: 2563 Description Facer's pet cat just gave birth to a brood of little cats. Having considered the health of those lovely cats, Facer decides to make t…

时间限制:1000ms 单点时限:1000ms 内存限制:256MB 描述 There are many homeless cats in PKU campus. They are all happy because the students in the cat club of PKU take good care of them. Li lei is one of the members of the cat club. He loves those cats very much. Last…

Cats Transport 出发时间居然能是负的,我服了... 卡了我十几次, 我一直以为斜率优化写搓了. 我们能得出dp方程式 dp[ i ][ j ] = min(dp[ k ][ j - 1 ] + hs[ i ] * (cnt[ i ] - cnt[ j ]) - sum[ i ] + sum[ j ]) k < i 这个东西显然能斜率优化, 直接搞. 其实不用离散化直接dp更好写. #include<bits/stdc++.h> #define LL long long #d…

Training little cats Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 13488   Accepted: 3335 Description Facer's pet cat just gave birth to a brood of little cats. Having considered the health of those lovely cats, Facer decides to make t…

Training little cats Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 11787 Accepted: 2892 Description Facer's pet cat just gave birth to a brood of little cats. Having considered the health of those lovely cats, Facer decides to make the c…

#1631 : Cats and Fish 时间限制:1000ms 单点时限:1000ms 内存限制:256MB 描述 There are many homeless cats in PKU campus. They are all happy because the students in the cat club of PKU take good care of them. Li lei is one of the members of the cat club. He loves thos…

题面:CF311B Cats Transport 题解: 首先我们观察到山与距离其实是没有什么用的,因为对于任意一只猫,我们都可以直接算出如果有一个人要恰好接走它,需要在哪一时刻出发,我们设第i只猫对应的这个时刻为$t_{i}$. 注意这个$t_{i}$是我自己新定义的,跟题目中的没有关系,下面所写的t都是我现在所定义的t,而跟原题面中的t没有任何关系. 然后我们对t数组排个序,于是题意转化为了有m只猫,每只猫有一个权值$t_{i}$,如果出发时间大于等于$t_{i}$,则可以接到第i只猫.设出…

题意 Zxr960115 is owner of a large farm. He feeds m cute cats and employs p feeders. There's a straight road across the farm and n hills along the road, numbered from 1 to n from left to right. The distance between hill i and (i - 1) is di meters. The…

Save your cats Time limit 8000 ms Memory limit 131072 kB Problem Description Nicholas Y. Alford was a cat lover. He had a garden in a village and kept many cats in his garden. The cats were so cute that people in the village also loved them. One day,…

[题解]Cats Transport (斜率优化+单调队列) # When Who Problem Lang Verdict Time Memory 55331572 Jun/09/2019 19:18UTC+8 Winlere D - Cats Transport GNU C++11 Accepted 405 ms 84200 KB 思考的过程很艰难,想清楚之后就不难做了.记录一下思路过程. 时间 事件 14:00 开始审题 14:15 手玩样例 14:30 Observe \(\times…

Zxr960115 is owner of a large farm. He feeds m cute cats and employs p feeders. There's a straight road across the farm and n hills along the road, numbered from 1 to n from left to right. The distance between hill i and (i - 1) is di meters. The fee…

\(Cats Transport\) 感觉这道题题面不好讲,就自翻了一个新的,希望有助于大家理解其思路: 大致题意: \(wch\) 的家里有 \(N\) 座山(山呈直线分布,第 \(i-1\) 座山到第 $i $ 座山距离为 \(Di\) ). \(wch\) 中了 \(M\) 粒种子,第 \(i\) 粒种子在第 \(Hi\) 座山上生长,并在 \(Ti\) 时刻成熟,然后从 \(Ti\) 时刻开始每过一时刻累积一点损坏度(从被采摘的那一刻开始不会继续损坏).但 \(wch\) 只雇佣了 \(…

Save your cats 题意:存在n个点,有m条边( input中读入的是 边的端点,要先转化为边的长度 ),做一个最小生成树,使得要去除的边的长度总和最小: 思路:利用并查集和求最小生成树的方法,注意这里的排序要从大到小排,这样最后建树的消耗最大,反过来去除的最小: 当然题意不是这么直白,感觉以后看到要做一个不成环的图时,要想到最小生成树: 下面是ac代码: #include <cstdio> #include <iostream> #include <cstring…

Nicholas Y. Alford was a cat lover. He had a garden in a village and kept many cats in his garden. The cats were so cute that people in the village also loved them. One day, an evil witch visited the village. She envied the cats for being loved by ev…

转载自:https://www.sohu.com/a/203933205_487483?sec=wd&spm=smpc.author.fd-d.2.1557386676880JSjtJwV 好多同学后台留言说姜老师最近技术文章写得少,主要原因是换了新工作之后正在熟悉相关业务,调整数据库架构,MGR调研.测试与上线等.此外还有神秘的金融云项目,目前雏形已完成,感觉市面上所有云都要哭晕在厕所啦~~~ 最近一直在跟进MySQL 8.0,周末发现InnoDB团队老大Sunny Bains发文的Conte…