Congrats on the launch! The idea is very attractive. Btw how do you solve the confidentiality problem where you have to put private data into public blockchain?
Thank you for your work. I absolutely love the book.
You might add links to buy digital copy at the very top of the page. Currently, I've found the link on 3rd attempt)
Also, why not sell on Gumroad (https://gumroad.com)? It is convenient.
Good luck!
Does it worth mentioning? Straightforward approach of storing numbers in a hash map in memory solves the problem. This may require say 40 Gb of ram w/o ANY optimizations.