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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.
20000/20000 is easy, worst case is actually 10000/20000.
I have a solution in Python that in the worst case (n = 20000 and m = 20000) it takes 1.08s (measured with timeit). Still can't beat the timeout error. Can someone tell me at least how far am I to an acceptable solution (in time)??? How fast should I be aiming on this?