—— 请按键盘 空白键 开始游戏 ——

Every mathematical problem has a solution; the challenge is finding it.
宇宙是一顿免费的午餐。
The secret to success is learning how to use pain and pleasure instead of having pain and pleasure use you. If you do that, you’re in control of your life. If you don’t, life controls you.
A good mathematician is not one who knows all the answers, but one who asks the right questions.