I agree 100%, Ive spent more time trying to understand the kata than actually coding.

Just want to say that this really highlights the issue of naming variables correctly, instead of "p" and P0" - call them what they are. A properly named variable is something that is very important when it comes to code readability, so why not name them "currentPopulation" and "populationObjective".

Try naming your variables better, uncle bob has some really good rules on naming things

Meanwhile when i used a List it timed out for me ;(