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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.
Yeah the largest sum path that you can only create by choosing the numbers directly below the number above it. So choosing the biggest of the two indexes won't always lead to the biggest max sum path, or something like that.
Chat-gtp or a similar llm is usually a good explainer of code.