摘要：
之前在师哥在讲动态规划的时候就推荐我们阅读一下这个在知乎下的一个回答，当时并不放在心上，现在做了一些动态规划的题目，经常产生一些疑惑与迷茫，现在拜读了这篇文章，觉得自己获益匪浅，于是做一下分享。 知乎关于这篇文章的链接https://www.zhihu.com/question/23995189/a 阅读全文
摘要：
A new e-mail service "Berlandesk" is going to be opened in Berland in the near future. The site administration wants to launch their project as soon a 阅读全文
摘要：
Xenia lives in a city that has n houses built along the main ringroad. The ringroad houses are numbered 1 through n in the clockwise order. The ringro 阅读全文