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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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I got fucked up by timeout issue caused by initial sample test case, had to rewrite stuff on flat array as register to let program reach the performance.
I got fuck up by timeout. so messy code cause by no mood to play it when timeout happens.