[lawrencewu]

You're right, I updated it to reflect that it's paid. I think email address is implied by the newsletter though.

I'm obviously biased but I think the problems are fun and the solutions are valuable. Here are some blog posts I wrote that hopefully give you an idea of our questions:

Given a table of currency exchange rates, determine whether there is a possible arbitrage: https://dailycodingproblem.com/blog/2018/01/02/find-an-arbit...

Picking a random element from an infinite stream: https://dailycodingproblem.com/blog/2017/11/30/random-elemen...

Merging k sorted lists: https://dailycodingproblem.com/blog/2017/11/29/how-to-solve-...