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'm actually more surprised that xenia managed to come up with the exact same solution I have, even naming of variables, and the error you have pointed out.
The
drop 1 res
part is incorrect. Since you append one element tores
when '(' is encountered, you should remove it from the tail ofres
when ')' is encountered, namelyinit res
.