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One tells as few lies as possible only by telling as few lies as possible, and not by having the least possible opportunity to do so.
The best way to predict the future is to invent it.
There's a tendency to think that our present politicians are much worse than we had in the past.But we tend to forget how awful our politicians were in the past.
一个问题如果在计算机上可以快速解决,那么它属于P类问题;如果一个解可以快速验证,那么它属于NP类问题。