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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.
25,25,25,100 should return YES, this code returns NO
Please add a test for 25,25,25,100. My first solution passed all tests, and I submitted it only to realize later that it fails on 25,25,25,100.