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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.
For sure the hardest kata I have solved so far, although I have solved few other 1 and 2 kyu katas. But also learned lots of new things and faster algorithms. It was great challenge!
Wow thank you a lot, adding '\0' character finally made my solution pass tests