填坑系列(p.246) 由函数连续性得满足二分性 #include<cstdio> #include<cstring> #include<cstdlib> #include<algorithm> #include<iostream> using namespace std; void setIO(const string& s) { freopen((s + ".in").c_str(), "r",…

题意:给你一个按发生时间的序列,表示与非门电路的输入,一开始全部输入是x,现在要改成尽量少的x,实现相同的功能. 题解:电路功能只有4中0,1,x,非x.那么如果一开始x改变了,输出结果不变,那么说明是常量电路.否则一定可以只用一个x来实现相同的功能,因为从全为0到全为1的过程中一定会有某个时刻,改变了一个位置上的值结果也随之改变. 由于m很大,不能一个一个地试,二分来找.判断的时候,如果输入端编号小于等于输入参数k,那么就为1,否则为0.如果mid跑出来的结果和全为1的一致,那么,mid+1以…

前段时间的一次样本,需要给出专杀,应急中遇到的是linux中比较常见的两个家族gates和xor. 首先是xor的专杀脚本,xor样本查杀的时候需要注意的是样本的主进程和子进程相互保护(详见之前的xor ddos分析http://www.cnblogs.com/goabout2/p/4888651.html),想要杀掉的话,需要先通过kill –stop挂起主进程,再删除其他的文件,但是由于xor的进程名是随机值,同时主机上还有有gates木马(gates最显著的特征就是会替换系统文件ps,ls…

Walls and Gates You are given a m x n 2D grid initialized with these three possible values. -1 - A wall or an obstacle. 0 - A gate. INF - Infinity means an empty room. We use the value 231 - 1 = 2147483647 to represent INF as you may assume that the…

Issue: Vault users cannot connect. VLOGS show the following error: Memory gates checking failed because the free memory (xxxxxx bytes) is less than 5% of total memory. Windows Application event log shows: Event 3: System.ServiceModel WebHost failed t…

题目理解麻烦,估计提交量少(总共只有32个人...)也是因为题目比较麻烦,看起来像物理题,实际理解了还可以.整个电路的功能就4种,先判断x=0和x=1的输出是否相同,吐过相同,而整个电路是常熟,随便输出:如果不同,,而二分1的个数继续测试. AC代码: #include <iostream> #include <cstdio> #include <cstdlib> #include <cctype> #include <cstring> #inc…

Bill Gates is one of the most famous figures in the business world. He is one of the richest men in the world, a philanthropist, an investor, and the co-founder of Microsoft, which became the world’s largest software company for personal computers. W…

bug描述 异常信息:内存入口检查失败,因为可用内存(xxx 字节)少于总内存的 xx%.因此,该服务不可用于传入的请求.若要解决此问题,请减少计算机上的负载,或调整 serviceHostingEnvironment 配置元素上的 minFreeMemoryPercentageToActivateService 的值. 说明: 执行当前 Web 请求期间,出现未经处理的异常.请检查堆栈跟踪信息,以了解有关该错误以及代码中导致错误的出处的详细信息. 异常详细信息: System.Insuffic…

http://codeforces.com/problemset/problem/935/B Two neighboring kingdoms decided to build a wall between them with some gates to enable the citizens to go from one kingdom to another. Each time a citizen passes through a gate, he has to pay one silver…

Two neighboring kingdoms decided to build a wall between them with some gates to enable the citizens to go from one kingdom to another. Each time a citizen passes through a gate, he has to pay one silver coin. The world can be represented by the firs…