why is this O(n) solution exceed time limit

  • 0

    I saw some other O(n) solution is correct, but this one is also O(n), why exceed time limit?

    class Solution(object):
        def findDuplicates(self, nums):
            if not nums:
                return []
            res = list(set([i for i in nums if nums.count(i) > 1]))
            return res

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