It is the [insert an arbitrary number] time I have determined to learn binary exploitation since April 2017. However I have always lost intention as the problems are much more challenging than I am capable of. I could hardly remember anything on the next time when I have determined to study again. That’s an incentive for me to write blog posts - I could read them and recall what has happened, thus spending less time learning all over from zero. Of course, it would be always better if I could persist.