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…

Content 一个动点 \(F\) 一开始在平面直角坐标系上原点的位置,随后它会移动 \(n\) 次,每次只能向上走或者向右走 \(1\) 个单位,求经过直线 \(y=x\) 的次数. 数据范围:\(1\leqslant n\leqslant 10^5\). Solution 注意,这里是经过直线 \(y=x\) 的次数而不是到达直线 \(y=x\) 的次数!比如说你上次操作往上走 \(1\) 个单位,到了 \((3,3)\),但随后你又往右走了 \(1\) 个单位,这就不算经过了!必须要到达…

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…

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",…

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…

Fafa and Ancient Mathematics 转换成树上问题dp一下. #include<bits/stdc++.h> #define LL long long #define fi first #define se second #define mk make_pair #define PLL pair<LL, LL> #define PLI pair<LL, int> #define PII pair<int, int> #define SZ…