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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.
I guess the shortest solution without using scripting engines which I think are cheating, because there was a remark not to use js eval...
I like it because it is not the usual tokenize, push, eval standard compiler stuff... and works more like humans tend to solve this.
Actually my test of "- (-1)" does not seem to work, but I guess it is not clearly specified if it is supposed to work...
hey, this is cheating, they disabled eval for js, so that's not the way its meant ;-)