上周才开始做这个CTF,用一周左右的时间完成了全部7道题.算是为即将到来的找工作进行热身和学习,下面记录一下遇到的问题和学到的东西,具体的解题过程就不详细描述了. challenge1 这道题用IDA打开发现是一个.net程序,于是用.NET Reflector反编译定位 button的处理函数,就可以定位解码函数了. challenge2 通过邮件里的描述(We saw what looked like attacker activity to this site)猜测页面里面被嵌入了恶意代码…

1. Intel Code Challenge Final Round (Div. 1 + Div. 2, Combined) B. Batch Sort    暴力枚举,水 1.题意:n*m的数组,每行最多可交换1次,列最多可交换两列,问最终是否可以变换到每行都是1~m. 2.总结:暴力即可. #include<bits/stdc++.h> #define F(i,a,b) for (int i=a;i<b;i++) #define FF(i,a,b) for (int i=a;i&l…

The Parallel Challenge Ballgame Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 547 Accepted Submission(s): 26 Problem DescriptionBefore the ACM/ICPC world final 2005, there is a competition called…

2295: [POJ Challenge]我爱你啊 Time Limit: 1 Sec  Memory Limit: 128 MB Description ftiasch是个十分受女生欢迎的同学,所以她总是收到许多情书.虽然她十分有魅力,然而她却是个低调的人.因此她从来不会告诉别人她到底收到了多少情书. ftiasch的好朋友1tthinking想知道她到底收到了多少情书.1tthinking知道,ftiasch每次收到一封情书,就会在日记最后写下一个包含"luvletter"子序列的…

 LCM Challenge Time Limit:1000MS     Memory Limit:64000KB     64bit IO Format:%lld & %llu Submit Status Practice ACdream 1077 Description Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I…

[codeforces 235]A. LCM Challenge 试题描述 Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I want to make a big number with it. But I also don't want to use many numbers, so I'll choose three…

这里有一篇文章,请阅读,感谢作者!http://blog.csdn.net/kmyhy/article/details/7733619 当请求的网站有安全认证问题时,都需要通过 [[challenge sender] useCredential:credential forAuthenticationChallenge:challenge]; 方法把相应的NSURLCredential对象注册到系统.…

Problem A. Poetry Challenge Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100500/attachments Description Let’s check another challenge of the IBM ICPC Chill Zone, a poetry challenge. One says a poetry string that starts with a…

以下转自: http://blog.csdn.net/qq1175421841/article/details/50312565 像点击(clicks)是GUI平台的核心,轻点(taps)是触摸平台的核心那样,手势(gestures)是Kinect应用程序的核心.和图形用户界面中的数字交互不同,手势是现实生活中存在的动作.如果没有电脑我们就不需要鼠标,但是没了Kinect,手势依然存在.从另一方面讲,手势是日常生活中人与人之间相互交流的一部分.手势能够增强演讲的说服力,能够用来强调和传递情感.像…

Large Scale Visual Recognition Challenge 2015 (ILSVRC2015) Legend: Yellow background = winner in this task according to this metric; authors are willing to reveal the method White background = authors are willing to reveal the method Grey background…