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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.
There is nothing to fix, because those values are fine. Read the description again. It's the number of steps, not the single digit number you get at the end what you should return.
very true
There appears to be a problem with the test case. 39->4 not 3 999 -> 2 not 4 25-> 0 not 2
Kindly correct this