"The pursuit of pure beauty is a trap, a fast track to bitterness and sorrow."

Our potential is one thing. What we do with it is quite another.

勇气是压力下的优雅。

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。