In the phonebook, I just kept dividing and dividing Mike Smith and dividing into half and in the end I found Mike Smith 50 or I found the number 50.

在电话簿的例子中，我先将其划分为两部分,接着再划分，最后就可以找到,或者数字。

哈佛公开课 - 计算机科学课程节选