Same problem occuring

ranks cannot be changed, it's no use complaining about them ;-)

Closing, no follow-up. Please don't raise an issue unless you're 100% sure it's a kata issue. A good indication that it's not the kata, but your code, is the number of times the kata has already been completed.

This kata has been completed close to 600 times in JS, so what's most likely is that you're missing some requirement or failing for some edge cases. Seeing you provided no actual examples, there's not much we can do to help you. See https://docs.codewars.com/training/troubleshooting for more info.

It's obviously an interesting part of this challenge to find a workaround and not use bigint.