—— 请按键盘 空白键 开始游戏 ——

The P versus NP problem is one of the most important unsolved problems in computer science.
"You don't have to be a genius to understand the universe. You just have to be curious."
黑夜原是为爱而生,白昼转眼就会回来。
A public-opinion poll is no substitute for thought.