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Yeah you would have to read the numbers into the array first, and yeah that could definitely potentially mean going through the entire array twice, or one and a half times, etc. But it should be noted here that this is still considered a linear rate of growth, and thus stated generally to be O(n). The fact that it could potentially be 2n does not matter much in the long run, what's important is that it's linear. That's how big O notation is typically used and it is to give a general idea of the eventual rate of growth.
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Sherlock and Array
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Yeah you would have to read the numbers into the array first, and yeah that could definitely potentially mean going through the entire array twice, or one and a half times, etc. But it should be noted here that this is still considered a linear rate of growth, and thus stated generally to be O(n). The fact that it could potentially be 2n does not matter much in the long run, what's important is that it's linear. That's how big O notation is typically used and it is to give a general idea of the eventual rate of growth.