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That's right. The key difference is that you can check if something is in a set without iterating over everything in it. if c in x is O(n) if x is a list, but O(1) if x is a set.
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That's right. The key difference is that you can check if something is in a set without iterating over everything in it.
if c in x
is O(n) if x is a list, but O(1) if x is a set.