—— 请按键盘 空白键 开始游戏 ——

Any idiot can face a crisis, it’s the day-to-day living that wears you out.
科学不是形式逻辑——它需要思想的自由发挥,与其他任何创造性艺术一样。
The concept of NP-completeness has provided a powerful tool for understanding the complexity of computational problems.