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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.
Fails to handle "(x)".
Empty stack exception for input "))".
Looks like a C program. There is a stack in Java, use it. Guess it doesn't handle "(x)".
if the input is "))", this solution will throw an empty stack exception, I believe.