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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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@hobovsky I fix this overflow error: https://www.codewars.com/kumite/604f5f1d754bcc000b66b109?sel=6294bef3c7f2d3006151cadd
Scala supports big integers, right? Isnt an overflow a bug in your solution then? Or you mean that expected answers are affected by overflow?