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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.
Should you have the notes of denomination 1, 3 and 5 available with a target of 6, there are two ways of making the total with the same (minimal) number of notes - 1 + 5 or 3 + 3. It appears that the tests only allow 3 + 3 and not 1 + 5 despite the same number of notes being used.
Suggest that either the text specifies that the number of denominations should also be minimal, or the tests are altered to accept either solution.
F# translation