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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 can take a look at my solution if you're looking to view one that doesn't use nested loops. Though my solution is done in JavaScript, it should translate to Python code without difficulty.
Each face of the tetrahedron is a triangle with the side of the N balls. I have a picture, but I can't add it to the condition of the problem
The difficulty is not the same in all languages...