Loading collection data...
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.
I thought that use of window functions might be the best choice, but couldn't figure it out why am i getting 2 results instead of 1.
Now, when i can see solutions, i still can't fully understand them...
Nice kata though :)