做一个世界的水手，游遍所有的港口。

I think it's very important to have a feedback loop, where you're constantly thinking about what you've done and how you could be doing it better.

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。