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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.
Because this solution is at least 5 years old and it wasn't revalidated.
xrange() was removed in Python 3, how this code passed the test?
Same here. 👍
Made the same "mistake" :)
This is me being pedantic, but xrange is removed in Python 3, not deprecated.
Nah, no need to mark that, unless it gives clear clues how to solve a kata, or solution code itself. (For 7-8 kyu that's not a big problem anyway)
If it keeps happening, try hard refresh, logging out and in, different browser... If it doesn't go away, try posting an issue on codewars GitHub page (there should be this exact issue somewhere...)
That's a very annoying and well known CodeWars bug. It doesn't happen too often lately, but still does. Just to be on the safe side, I suggest to copy your solution to clipboard before submitting, so you can resubmit, if bug happens. If it happened twice in a row, you may consider buying a lottery ticket :P