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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.
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The type long is not sufficient for the test with the number 59884848459853. I had to change it to long long in order to run tests on large numbers.
This comment is hidden because it contains spoiler information about the solution