It's cool how the random tests test for tens of thousands of electrons. Can an atom actually be that powerful? Haha.

s contains 2 electrons, p has 6, while d can hold 10. 3d has a higher energy state than 4s, so 4s gets filled first, then goes 3d. Are you referring to this? I think the kata simplified this to avoid using the (s + 0.7 * l) formula. (If I correctly remember this thing from my middle school chemistry class.

The problem asked to use the filter function. How did this code past the "filter in code" test?

I've posted the Python translation of this kata 8 months ago. Could it plz be checked and approved/rejected?

Python has everything(doge)

How glad I am to see lambda calculus enabled! May codewars thrive!

I have learned some Rust and the experience was painful preciscly because of the design strategy you are employing. But I'll take care and try to do that afterwars.

I have not been writing C for a long time. Can someone please tell me why we can pass the compiler without explicitly stating the return type?

You C people really know how to make easy jobs hard lol!

ekk, why not just write a BF translation? lol
Good idea tho!

How is this done??

R language no random test cases.