[WF2012]infiltration 完全图 最多选择logn个点(下取整)(每选择一个点覆盖至少一半的规模) 暴力O(75^5)(不严格)枚举+bitset (随机化也可过) #include<bits/stdc++.h> #define reg register int #define il inline #define int long long #define numb (ch^'0') using namespace std; typedef long long ll; il v…

答案是$O(\log n)$级别的,故答案不超过6. 当答案是12345时,暴力枚举+压位检验即可,否则直接输出6. 时间复杂度$O(n^5)$. #include<cstdio> #define N 80 #define rep(i,n) for(int i=0;i<n;i++) typedef unsigned int U; int n,T;char s[N]; struct P{ U x,y,z; P(){x=y=z=0;} P(U _x,U _y,U _z){x=_x,y=_y,…

参考:https://www.cnblogs.com/ccz181078/p/5622200.html 非常服气.jpg 就是random_shuffle几次然后顺着找,ans取min... #include<iostream> #include<cstdio> #include<cstdlib> #include<algorithm> using namespace std; int n,ans,cas,a[100],tot,c[100],s[100],t…

Search GO 说明:输入题号直接进入相应题目,如需搜索含数字的题目,请在关键词前加单引号 Problem ID Title Source AC Submit Y 1000 A+B Problem 10983 18765 Y 1036 [ZJOI2008]树的统计Count 5293 13132 Y 1588 [HNOI2002]营业额统计 5056 13607 1001 [BeiJing2006]狼抓兔子 4526 18386 Y 2002 [Hnoi2010]Bounce 弹飞绵羊 43…

Description 斐波那契01字符串的定义如下 F(n) = { 0  if n = 0 1  if n = 1 F(n-1)+F(n-2) if n >= 2 } 这里+的定义是字符串的连接.F(n)的前几个元素如下: F(0)=0 F(1)=1 F(2)=10 F(3)=101 F(4)=10110 F(5)=10110101 F(6)=1011010110110 F(7)=101101011011010110101 F(8)=10110101101101011010110110101…

Description 题意:给定一个点数为n的竞赛图,求图的最小支配集 n<=75 Solution 如果将竞赛图的一个点删去,这个图还是竞赛图 而竞赛图每个点相连的边数为(n-1),那么删去一个点后这个图变成原图一半大小的竞赛图 由此可知竞赛图的最小支配集是log(n)级别的 那么答案最大为6,爆搜即可 Code #include <cstdio> #include <algorithm> #include <cstring> #include <bit…

This post summarises different ways of constructing continuous functions, which are introduced in Section 18 of James Munkres "Topology". Constant function. Inclusion function. N.B. The function domain should have the subspace topology relative…

关于数据挖掘发表文章,我们知道很多人是看不上.瞧不起.嗤之以鼻的.大抵是因为这些人平时只发 CNS 主刊,所以才认为通过数据挖掘这种用「别人的数据」或者叫「干实验」来发文章是“「垃圾」,没有什么价值. 真的是这样吗?今天我们要介绍的就是一篇做数据挖掘的 Cancer Cell 杂志的文章(IF: 27.4),大家来看看文章怎么样. A Comprehensive Pan-Cancer Molecular Study of Gynecologic and Breast Cancers. Cance…

Can peel peel solve pesticide problem? Middle peasants medicinal modern agriculture more and more, this had to let people eat vegetable fruit more will be on their own, buy fruits and vegetables is washed and washed, afraid of accidentally take pesti…

The present invention relates to the field of security of electronic data and/or communications. In one form, the invention relates to data security and/or privacy in a distributed and/or decentralised network environment. In another form, the invent…

研究了两天,终于实现了利用xBIM自动输出墙和门窗 比较粗糙的源码如下: private void Form1_Load(object sender, EventArgs e) { //first create and initialise a model called Hello Wall Console.WriteLine("Initialising the IFC Project...."); using (var model = CreateandInitModel("…

ThinkPHP5.0 漏洞测试 自从ThinkPHP发布漏洞补丁以来,服务器不知道多少次受到了批量扫描漏洞来抓取肉鸡的请求 虽然官方早已发布补丁,还是想试一下TP漏洞,测试两个漏洞 一.全版本执行漏洞 <!-- GET --> http://127.0.0.1/ThinkPHP/index.php?s=index/think\app/invokefunction&function=call_user_func_array&vars[0]=phpinfo&vars[1]…