How to improve run time of this O(n) python solution?

  • 0

    So how do people get fast results?
    My solution is O(n) already, but it only beats like 40% of accepted solutions.
    Can someone point out where I could improve it?
    Or was the run time dependent on the time of day?

    class Solution(object):
        def twoSum(self, nums, target):
            data = {}
            for i, n in enumerate(nums):
                if n in data:
                    return data[n], i
                    data[target - n] = i

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