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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.
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There is a bug in the C# solution. The given solution expects 0 for the case start == end, but the actual result should be start (or end). Please fix your solution!