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"We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm."
This is the map that shows us where we're going. And this is the map that shows us where we've been. And it's never ever ugly.
理论计算机科学中的挑战不仅仅是解决问题,而是理解为什么它们难以解决。
如果你不知道自己急切需要的是什么,那很可能就是睡觉。