每部电影都是一个谜题,每部电影都是一个谜。
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
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。