找到一棵dfs搜索树,给每条非树边一个随机非0权值,每条树边为所有经过它的树边的权值的异或. 那么有2种情况是合法的: 1.一条边权值为0,一条边权值非0. 2.两条边异或和为0. 排序后统计即可,时间复杂度$O(m\log m)$. #include<cstdio> #include<algorithm> const int N=2010,M=100010; int n,m,i,j,e[M][2],g[N],v[M<<1],w[M<<1],nxt[M<…

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…

这一阵花了些时间,把 cocos2d-html5 里的sample 游戏<Fruit Attack>给移植到了WP8上来,目前已经实现了基本的功能,但是还有几个已知的bug,比如WP8只支持WAV格式 的音乐,而我没有去转格式, 所以无法播放声音: 提示手势的显示位置有问题:源代码的执行效率过低等,但是对于初级的学习应该还是有一定参考意义的,我也加入了自己的一部分注释. 应该说移植的过程还是比较顺利的,毕竟API都是兼容的.但是因为原游戏并不是多分辨率适配的,图片等资源都不是太合适,再加上缺乏…

https://www.owasp.org/images/0/04/Roberto_Suggi_Liverani_OWASPNZDAY2010-Defending_against_application_DoS.pdf slowloris http://www.huffingtonpost.co.uk/-frontier/slow-loris_b_8541930.html 蜂猴 懒猴 slow:    adj. 1.慢的,缓慢的 (opp. fast; qu ... loris:    n. (…

题目链接: 传送门 Cells Not Under Attack time limit per test:2 second     memory limit per test:256 megabytes Description Vasya has the square chessboard of size n × n and m rooks. Initially the chessboard is empty. Vasya will consequently put the rooks on t…

#!/usr/bin/perl## PadBuster v0.3 - Automated script for performing Padding Oracle attacks# Brian Holyfield - Gotham Digital Science (labs@gdssecurity.com)## Credits to J.Rizzo and T.Duong for providing proof of concept web exploit# techniques and S.V…

人机接口设备攻击(HID Attack)   HID Attack是最近几年流行的一类攻击方式.HID是Human Interface Device的缩写,意思是人机接口设备.它是对鼠标.键盘.游戏手柄这一类可以操控电脑设备的统称.由于电脑对这类设备缺少严格的检测措施,只是简单的识别设备类型,就允许设备对电脑进行各项操作.所以,通过修改篡改设备反馈信息,就可以很轻松的让电脑将其他设备误认为HID设备,从而获取控制权限.尤其是USB和蓝牙这类即插即用接口出现,导致HID Attack成为重要方式.…

B. Cells Not Under Attack time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vasya has the square chessboard of size n × n and m rooks. Initially the chessboard is empty. Vasya will consequen…

http://www.ush.it/2009/07/26/php-filesystem-attack-vectors-take-two/ Did you enjoyed our previous "PHP filesystem attack vectors" research? This is the second part and continuation of that paper and highlight new ways to evade filters using some…

http://www.ush.it/2009/02/08/php-filesystem-attack-vectors/ On Apr 07, 2008 I spoke with Kuza55 and Wisec about an attack I found some time before that was a new attack vector for filesystem functions (fopen, (include|require)[_once]?, file_(put|get)…