C. Perfect Security time limit per test3.5 seconds memory limit per test512 megabytes inputstandard input outputstandard output Alice has a very important message M consisting of some non-negative integers that she wants to keep secret from Eve. Alic…
传送门 01trie板子题. 给出两个数列,允许把第二个数列重新排列. 求使得两个数列每个位置对应的数的异或值和成为最小值的每个位置的异或和. 把第二个数列插入到01trie里面然后对于第一个数列中的数挨个询问最小异或和即可. 代码: #include<bits/stdc++.h> #define ri register int using namespace std; const int N=3e5+5,P=30; int n,son[N*30][2],siz[N*30],a[N],tot=…
Week 8 This week we start two weeks of Internet Security. It is a little technical but don't worry - we stay at a very high level and I am confident that if you are still keeping up with the class that you will enjoy these next two weeks. You won't k…
Hiding Date from Ohters Security Introduction Alice and Bob是密码学.博弈论.物理学等领域中的通用角色之一.Alice(代表A)和Bob(代表B)一般是形容好人的,用来描述通讯双方.通讯中也会出现一些不怀好意的人(People with bad intent),比如窃听者(Eve),用E代表. Security is Always a Tradeoff,安全总是一种充满妥协的权衡.对于安全这回事,几乎不存在所谓的Perfect Secur…
[This post is based on a document authored by Ben Grover (a senior developer at Microsoft). It is our intention to integrate this information into the MVC 3 documentation on MSDN. We hope to hear from you and welcome any suggestions you might have.]…
A. Primal Sport 题意:有两个人轮流玩游戏.给出数X(i-1),轮到的人需要找到一个小于X(i-1)的素数x,然后得到Xi,Xi是x的倍数中大于等于X(i-1)的最小的数.现在已知X2,求最小的X0? 思路:根据题意,X1的取值范围为[X1-X2的最大质因子+1,X2),同理可知X0的取值范围为[X1-X1的最大质因子+1,,X1). #include<iostream> #include<cstring> #include<cstdio> #includ…
A. Protect Sheep time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Bob is a farmer. He has a large pasture with many sheep. Recently, he has lost some of them due to wolf attacks. He thus dec…
A. Protect Sheep time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Bob is a farmer. He has a large pasture with many sheep. Recently, he has lost some of them due to wolf attacks. He thus dec…
This application respects and protects the privacy of all users who use the service. In order to provide you with more accurate and personalized services, this application will use and disclose your personal information in accordance with the provisi…
This application respects and protects the privacy of all users who use the service. In order to provide you with more accurate and personalized services, this application will use and disclose your personal information in accordance with the provisi…
copy system:running-config nvram:startup-config : to save your configuration changes to the startup configuration so that the changes will not be lost if the software reloads or a power outage occurs command | {begin | include | exclude} regular-expr…
Security Checklist Website by Michael Horowitz Home | Introduction | Router Bugs | Security Checklist | Tests | Resources | About | The most expert person in the world can only make a router as secure as the firmware (router OS) allows. The foll…
https://www.checkmarx.com/2014/11/13/the-ultimate-list-of-open-source-static-code-analysis-security-tools/ Doing security the right way demands an army – of developers, security teams, and the tools that each uses to help create and maintain secure c…
