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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.
Nah. This is the "clever" solution that still uses two iterators and concat.
This is at least a 6 kyu problem. You should try some 7 kyu problems. Honesetly, 5 kyu is fine given the difficulty of actual 6/7 kyu problems.
Or just
> 1.Putting increments or decrements before or after don't really matter in these instances since you are comparing to a fixed value. You just have to do some maths to figure out what that value is.