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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.
There would be no way to determine that a operator was unary in the postfix notation, so it wouldn't make sense to allow for them unless you remove all the unary
+and turn-xinto0x-.assuming my changes have fixed c++ version.
I didn't make the C++ solution so if this fixes it please mark this issue as resolved, I've made some changes but unsure if they are correct.