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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.
This was a bit more difficult than I expected on 4 kyu...
I liked it, but I didn't plan to spend half of my day with debugging today. :)
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Agree. There's nothing difficult about the solution, but due to the problem's complexity, and the time it took to understand what I had to do, it should be at least 4 kyu.
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Great one.
I completely forgot regular expressions since school. :)
I think doing it right, and not the 5-6 line brute-force way, is a 4kyu task.
just imagine how much time and memory you need to use to count the length of a single [ 0 - 1 000 000 000 000] interval
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