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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.
The kata description says
What is being subtracted by what? Is it subtraction or difference, which will be the absolute value?
int
is not a suitable return value type: result such aspowerOfPrimes(777777777)
easily surpasses the value of aint
.