A problem is in P if it can be solved quickly by a computer, and in NP if a solution can be verified quickly.

"We are all prisoners of our own desires."

解释：货卖完了才知道不足，是由于不懂得计量；事情结束了才知道有余，是由于不懂得调节。

I am interested in how we see, and how we can represent that seeing.

只有在梦想中，人才能真正自由。从来如此也将永远如此。