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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.
The way that conj behaves differently for lists and vectors is still confusing to me at times, but this is probably the best solution.
Me too :(
Edit: solved the problem. It's timing out, even though it doesn't say so. Try adding a test for n = 1000000, answer is 249998. Now you'll need a faster algorithm. :)
Didn't know about that %&, thanks!
Interesting, I didn't know that!
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