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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.
python new test framework is required. updated in this fork
Good kata but input should be tested upto 10^6 to make it a little bit more challenging ..
There're already too many trivial "primality test" katas.