And by that, I mean, not how much memory do I need to store the size of the input, it's really how much internal memory do I use up as I go through the computation?

需要占用多少内存,我意思并不是，存储输入需要多少内存,而是当我完成这个？

麻省理工公开课 - 计算机科学及编程导论课程节选