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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.
I agree with OP. The attempt should be false on this exact example, because $a1[2] squared is not $a2[3]. This is the exact comparison that comes up in my code in the false case, yet the test for this set of arrays is expecting true. 19 * 19 (361) does not equal 36100.
Yes, read this and this
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