Actually it's not 40, I think these are, 75 alright. So the answer is 75 and the number of calls is 1.7 million.

实际上不是4，我觉得，好了，所以答案是5,调用次数是1百70万次。

麻省理工公开课 - 计算机科学及编程导论课程节选

That's a good thing. And instead of 17 million calls, I have 1800 calls.

真好，我们只调用了1800次函数,而不是一开始的1百70万次。

麻省理工公开课 - 计算机科学及编程导论课程节选