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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.
Congrats!
The tree looks as follows:
So the error is either the 9 or the 1 and both are leaves. The description states to take the right leaf in such case.
O_o
the picture confused me - the root is at the top and the leaves are at the bottom ...
I have modified the description to make this clearer.
see description, in case of ambiguity, take the right child node