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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Try an "attempt", the "test" is failing for me as well.
I believe the logic in test and attempt is different.
this was Python 2
I must have broken something when updating this kata to Node 18. Should be fixed now, please veryfy (you might have to click RESET to see new tests, so make sure to back up your solution).
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I'm not sure if I understood you correctly, but this is, in fact, O(n^2) too.
Single colon works fine here.
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