i got a crude formula and used mathway :P

How did you guys arrive at this formula?

Re-raised as issue.

Just in case someone else runs into this confusion: minimizing i takes precedence over minimizing j. This seemed consistent to me.

This probably is a detail, but Julia indexes starting with 1, so to keep things consistent, it would be better to return 1-based index values for i and j, i.e. adding 1 to them for the test cases in Julia.

There are a lot of Kata that you can brute force in this way with a little google-fu even if you don't know the exact number. In fact you can google-fu a lot of katas if you really want.

Fixed

Great, thanks a lot!

Description updated again, and in light of the discussions here, I feel issue is resolved. Let me know if not.

Updated the description to addess the 2 , 5 issue. However, on the issue of limits, the rating (6 Kyu) gives guidance on the limits and guarantees that it's not a performance Kata, so I dont think it's necessary to include it.

Updated description. Let me know if OK so we can close.

Also thanks for the inspiration 👍

I hope the discussion here helped? There is plenty of discussion, particularly in reference to the 2,5 issue.

Done!

In addition to the question regarding 2 and 5 (which I also found confusing), I suggest to add the range of numbers to be tested in the description. This is especially useful given the hard version made by @docgunthrop.