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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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Only one answer to this question: some part of your code is too slow.
I have solved the question with PHP but I get the following error when I Attempt.
Execution Timed Out (12000 ms)
in py pc and in localhost i have no problem with huge numbers and gaps.