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Given a string, return true if it is a nesting of zero or more pairs of parentheses, like "(())" or "((()))". Suggestion: check the first...
X166: nestParen
Given a string, return true if it is a nesting of zero or more pairs of parentheses, like "(())" or "((()))". Suggestion: check the first and last characters, and then recurse on what's inside them.
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