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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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It looks like I need to brush up on my math. I tried the easiest way - loop within loop which is going to take forever with bigger numbers hence the server's refusal to execute the code.
Sorry, it's not an issue of the kata. If you think it's a server problem report it as a bug at CW. Look at the top of the page and see how many guys passed the kata. Cheers.
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Simplicity is the best