qq_44134712的博客

In our daily life we often use 233 to express our feelings. Actually, we may say 2333, 23333, or 233333 ... in the same meaning. And here is the question: Suppose we have a matrix called 233 matrix. ...

　　According to a research, VIM users tend to have shorter fingers, compared with Emacs users.　　Hence they prefer problems short, too. Here is a short one:　　Given n (1 <= n <= 10 18), You shou...