一个问题如果在计算机上可以快速解决，那么它属于P类问题；如果一个解可以快速验证，那么它属于NP类问题。
A problem is in P if it can be solved quickly by a computer, and in NP if a solution can be verified quickly.
我的作品存在于诗歌与政治之间的空间。
A good scientist is like a detective, always looking for clues in the details.
The end of the battle of El Alamein is not war, not even the beginning of the war period ended, and may be the end of the war period.
The strongest weapon you have is your mind. Train it well.