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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.
Yes, indeed
Runtime per se won't be a problem here (maybe it is about 0.4ms). The real trouble is, that this ends up in an infinite loop for values above the square closest to INT_MAX.
Nice !
But what about big numbers, according compute time (eg: 2147395600 or 2147483647)
nice ! It will not need math.h