保持进步的唯一方法就是保持渴望。
The only way to keep improving is to stay hungry.
The only thing that stands between a man and what he wants from life is often merely the will to try it and the faith to believe that it is possible.
计算复杂性的研究告诉我们,有些问题本质上是困难的,无论我们的算法多么聪明。