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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.
Is it somewhere explicitly stated that duplicates shall be removed from sequence
u? Instruction "ordered (with <=)" indicates possible duplicates imho. But in tests isdblLinear(20) == 57instead ofdblLinear(20) == 55(with duplication on 31).