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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.
maybe some ghosts
"Your classmates asked you to copy some paperwork for them. You know that there are 'n' classmates and the paperwork has 'm' pages."
Test case: n = -5, m = -5
In what scenario would 5 minus classmates would ask me for 5 minus copies, am I imagining having friends?!