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.
What do you mean, "broken too"?
We can't really tell what is wrong with your solution without knowing what your solution is.
Number of lines has nothing to do with speed. Try running your function with strings of length 500k chars, and you'll quickly see that your code is slow.