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.
then try the same input on your own machine and figure out why it does not work
Cannot invoke "java.lang.Long.longValue()" because the return value of "java.util.Map.get(Object)" is null
My solution passes the tests, except for "Odd characters". What to do?