What does it mean? The reason they are conservative or non-conservative has to do with the splitting of the derivatives. Consider the conservative derivative: \[ \frac{\partial \rho u}{\partial x} \] When we discretize this, using a simple numerical…

题意:一个展览有n个步骤,告诉你每一步在那个场馆举行,总共2个场馆,跨越场馆需要1单位时间,先给你一些约束关系,比如步骤a要在b前执行,问最少的转移时间是多少. 解法:根据这些约束关系可以建立有向边,可以看出是拓扑排序问题,问题是怎样拓扑排序. 进行两次拓扑排序,分别建立两个集合,一个放场馆1举行的步骤,一个放场馆2的,然后第一次从场馆1开始进行拓扑排序,每次一个场馆取完后看另一个场馆是否有步骤要执行,有则执行,然后将度数变为0的压入队列,如此往复.第二次从场馆2开始进行.得出的最小值为答案.…

题目不难,感觉像是一个拓扑排序,要用双端队列来维护: 要注意细节,不然WA到死  = =! #include<cstdio> #include<cstring> #include<vector> #define maxn 100005 using namespace std; *maxn],count[][maxn],tail,head,n,m,in[maxn]; vector<int>ve[maxn]; int solve(int lab) { head=…

Given an array equations of strings that represent relationships between variables, each string equations[i] has length 4 and takes one of two different forms: "a==b" or "a!=b".  Here, a and b are lowercase letters (not necessarily dif…

Given an array equations of strings that represent relationships between variables, each string equations[i] has length 4and takes one of two different forms: "a==b" or "a!=b".  Here, a and b are lowercase letters (not necessarily diff…

原题链接在这里:https://leetcode.com/problems/satisfiability-of-equality-equations/ 题目: Given an array equations of strings that represent relationships between variables, each string equations[i] has length 4 and takes one of two different forms: "a==b"…

Given an array equations of strings that represent relationships between variables, each string equations[i] has length 4 and takes one of two different forms: "a==b" or "a!=b".  Here, a and b are lowercase letters (not necessarily dif…

题目如下: Given an array equations of strings that represent relationships between variables, each string equations[i] has length 4 and takes one of two different forms: "a==b" or "a!=b".  Here, a and bare lowercase letters (not necessaril…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 DFS 并查集 日期 题目地址:https://leetcode.com/problems/satisfiability-of-equality-equations/ 题目描述 Given an array equations of strings that represent relationships between variables, eac…

最近因项目需要,我自己设计开发了一个基于Windows Forms的向导开发框架,目前我已经将其开源,并发布了一个NuGet安装包.比较囧的一件事是,当我发布了NuGet安装包以后,发现原来已经有一个.NET的向导开发框架了,它叫Microsoft Visual Studio 2013 Wizard Framework.我并没有对其进行深入研究,单从名称上看,该框架是否只能在Visual Studio 2013下使用?上网搜索过,也没发现微软有比较详细的官方资料介绍这个框架.不过无论如何,我还是…