—— 请按键盘 空白键 开始游戏 ——

How wonderful that we have met with a paradox. Now we have some hope of making progress.
"Books are a form of political action. Books are knowledge. Books are reflection. Books change your mind."
在数学中,我们常常追求优雅和简洁,但在计算机科学中,我们还必须考虑实用性和效率。