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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.
it's beautiful
Did you solve it though? Also don't understand it
EDIT: solved it. For future users, refer to the previous comment made in this discussion:
It's not clear that the input represents a price timeline where the sale occurs sometime after the purchase, and not, say, a list of shops where you can trade freely.
hahaha