Given a valid parentheses string s, return the nesting depth of s.

For example, if you take a pregnancy test too early, you could get a false-negative result because your body isn’t producing enough human chorionic gonadotrophin (HCG) yet. To ensure you get the most ...

While you can get tested at a doctor’s office or a clinic, if you’re concerned about a specific STD, a home test may be a quicker and cheaper way to get results. Testing for STIs at home is ...

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Experienced rangers search for eggs by helicopter and buggy or travel by foot into nesting areas. "We walk in with a pretty big group, try and make as much noise as we can so the animals know we ...