P与NP问题是计算机科学中最重要的一个问题之一。
"I'm not perfect, but I'm trying every day to concentrate on being better."
我们曾有过残暴的国王,也有过愚蠢的国王。但我真不知道是造了什么孽才有了这有一个又残暴又愚蠢的国王。
The artist must be a perpetual beginner.
Life is pleasant. Death is peaceful. It's the transition that's troublesome.