The world is full of willing people; some willing to work, the rest willing to let them.
在一个不断试图让你成为别人的世界里,做你自己是最大的成就。
P与NP问题是计算机科学中最重要的一个问题之一。
"The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion."