I don't have an issue with the problem. I just wonder how many people who use the site will have any idea of how to approach it. In all the problems on the site I think that there is only one where I needed to use some significant mathematics. That was Easter Eggs Advanced. If problems requiring advanced maths are to become more common then it might be an idea to give some indication of this in the problem description. I have assumed that the mathematics tag for a problem meant senior school level mathematics (at best) rather than anything beyond that.

Hi Clive and thanks for the insight!

On ideas to approach the problem, I felt, when adding it, there are at least two - either one knows whimsical stats calculations or, thanks to 3-digits precision expected, it is an opportunity to carefully create simulation experiment.

My main fault probably is that I haven't tested either way beforehand! Sorry for that!

It looks already 3 persons knows "how to approach" the first way (there were failed submissions by JesseDai), so probably it may enjoy some audience even here. We remember here are easier problems requiring using/knowing some formula (e.g. even "Bicycle Race", "Triangle Area" and somewhat unexpectedly "Star Medals" and even "Josephus") and I never knew whether problems of such kind are good for programming-related collection. So perhaps let this one also exist, but I'll try not abuse the topic of "degree" problems in future according to your hint :)

Meanwhile, let's do this - I'll share the formulas suggested by Artyom to you and Mathias by email, so it is easier to discuss suitable amendments.