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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.
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Just looking at that tells me that it would return false with this solution, it tests if n < 0 on each iteration of the loop. and would return false when it reached your string[2].
best solution
validParentheses("())(()") expected false but yout solution return true
tank you so mach
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