NP完全性的概念为理解计算问题的复杂性提供了一个强大的工具。
我通过圆点看世界，这就是我理解它的方式。
Our experience tends to confirm a long-held notion that being prepared, on a few occasions in a lifetime, to act promptly in scale, in doing some simple and logical thing, will often dramatically improve the financial results of that lifetime.
The best way to make your dreams come true is to wake up.
The road to success is always under construction.
