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I think the word consecutive is misleading here. Think about it, the number of valleys is just the number of times you went down below sea level and back up again. Every time it starts at sea level and goes down then back up to sea level, that is a valley. It doesn't need the word 'consecutive' in there.
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Lonely Integer
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I think the word consecutive is misleading here. Think about it, the number of valleys is just the number of times you went down below sea level and back up again. Every time it starts at sea level and goes down then back up to sea level, that is a valley. It doesn't need the word 'consecutive' in there.