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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.
you should specify such information in the description
Can there even be duplicates in the input?
pairs like 2+2 or 3+3 just as trueok, so how many pairs are there in this array then?
[4, 2, 2]-> 1 or 3 ?That is a strange pair, why don't you show this in the example in the description?