"So it's certainly not going to be with us in anything less than three years, and I think it's more likely that we're in a five to ten year time frame."

VOA: standard.2010.07.21

So if N is not less than 2, that is I have two elements or more in which case there's definitely some sorting to be done.

因此如果N不小于2，也就是有2个或更多的元素,那当然是需要做排序的。

哈佛公开课 - 计算机科学课程节选