I could do this, by the way, by running the code and putting print statements in various places as well, but the hand simulation is valuable, so let me just start it.

做了正确的更新，顺便说一句,我可以通过在很多地方,放置print声明来达到这个目的,但是手工模拟也很有用。

麻省理工公开课 - 计算机科学及编程导论课程节选