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幸福的幸里面是一个“幸”,不是一个“辛”。  或者理解成,Y=Why=为什么,I=我。幸福里面没有为什么,只有我。 
I’m a firm believer in the theory that you only get out what you put in.
The quest for efficient algorithms is not just a technical challenge; it is a journey into the heart of complexity.