题There are 2N white balls on a table in two rows, making a nice 2-by-N rectangle. Jon has a big paint bucketfull of black paint. (Don’t ask why.) He wants to ...

我发现写设计模式的文章，怎么举例子是个技术活啊。。。很多东西你不实际去用真的不会真正的体会到设计模式带来的一些好处，最近公司的一个客户要做一个考勤功能，这个功能虽然是我们公司产品的标准功能，但是有些东西还是二...

http://acm.hust.edu.cn/vjudge/contest/view.action?cid=102271#problem/ADescriptionCarl is a beginne

Lele now is thinking about a simple function f(x). If x < 10 f(x) = x. If x >= 10 f(x) = a0 * f(x-1) + a1 * f(x-2) + a2 * f(x-3) + …… + a9 * f(x-10); And ai...

A friend of you is doing research on the Traveling Knight Problem (TKP) where you are to find the shortest closed tour of knight moves that visits each square o...

The cows don't use actual bowling balls when they go bowling. They each take a number (in the range 0..99), though, and line up in a standard bowling-pin-like t...

In this problem your goal is to sort an array consisting of n integers in at most n swaps. For the given array find the sequence of swaps that makes the array s...

http://acm.hust.edu.cn/vjudge/contest/view.action?cid=102419#problem/EDescriptionAn infinitely lon

Kevin Sun wants to move his precious collection of n cowbells from Naperthrill to Exeter, where there is actually grass instead of corn. Before moving, he must ...

方法/步骤 首先我们连接上Linux服务器 使用使用 iptables -L -n 可以查看出当前的防火墙规则 使用iptables -L -n --line-