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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.
well i figured it.this is bcz of using 2D array in my case ,so i used 1D array now i'm getting 'time out' error
i have passed the test but when trying to submit this returns
"FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of memory"
any solution?