题意:给定简单无向图,求一个最小的边集使得这些点是边双,输出方案.n <= 14 解:考虑一个边双肯定是一条一条的链拼起来的.于是每次枚举一条链加上去就行了. 设fs表示点集s形成边双的最小边数.linki,j,s表示点集s能否形成一个i - j的链.link2x,s表示点x和点集s是否直接相连. 上面这些数组都要记录方案,特别地,link2要记录两个方案,为了应对拼上去的链退化成一个点的情况. #include <bits/stdc++.h> ; struct Edge { int n…

看别人写的才学会的... 我们考虑刚开始的一个点, 然后我们枚举接上去的一条一条链, dp[mask]表示当前已经加进去点的状态是mask所需的最少边数. 反正就是很麻烦的一道题, 让我自己写我是写不出来的... 我好菜啊. #include<bits/stdc++.h> #define LL long long #define LD long double #define ull unsigned long long #define fi first #define se second #d…

CF 传送门 T1:Reverse a Substring 只有本身单调不减的字符串不能转换为字典序更小的字符串.否则肯定会出现 \(s_i>s_{i+1}\) 的情况. 所以只要从头到尾扫一遍,找到 \(s_i>s_{i+1}\) 的位置,输出 \(i+1\) 与 \(i+2\) 即可(从 \(0\) 开始). Code: #include<bits/stdc++.h> using namespace std; string s; int n; int main(){ scanf…

What is "Deployment pipeline"? A deployment pipeline is an automated implementation of your application's build,deploy,test and release process. Typically a deployment pipeline includes: Commit stage(Compile/Unit test/Analysis/Build installers)…

Time Limit: 2 Seconds      Memory Limit: 65536 KB When we are focusing on solving problems, we usually prefer to stay in front of computers rather than go out for lunch. At this time, we may call for food delivery. Suppose there are N people living i…

Event Delivery: The Responder Chain  事件分发--响应链 When you design your app, it’s likely that you want to respond to events dynamically. For example, a touch can occur in many different objects onscreen, and you have to decide which object you want to re…

Coding Standards & Best Practices 7 Reasons to use a Content Delivery Network CDN公共库汇总…

题目链接: D. Delivery Bears time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Niwel is a little golden bear. As everyone knows, bears live in forests, but Niwel got tired of seeing all the trees…

Delivery 题目还是自己看吧 - -! 看似图论,实际上是一个考察思维以及数据结构的题. 我们对于先前和向后的边分别进行统计. 对询问离线. 小边按照左端点从大到小排序. 1.对于向后的边,询问按照出发点从大到小排序.比如询问有 2 3 3 4 我们先对3 4进行计算.把向后的小边(3,5) ,(3,4) 用线段树维护,分别在线段树的位置4,5中插入用该边时可以优化的值.询问3 4时,我们发现出发点3以及后面的小边都加进了线段树中,直接询问线段树区间 [3,4]的最小值进行计算即可.注意一…

If SO is incomplete, then automatically set the delivery block on the SO header. as suggested by earlie conutants, u need to make use of user exit MV45AFZZ, at save document prepare, Here you can ask the abap consultant to write the code where it che…