Having done that, I could do the same thing, so I suppose I take this branch, I can pick a spot like, say, this one, and look there.

再从其中随即选取一个元素，比如这一个，请注意，如果相等则结束，如果不相等的话就在它的左边或右边找。

麻省理工公开课 - 计算机科学及编程导论课程节选