python 46ms answer

  • 1
    class Solution(object):
        def singleNumber(self, nums):
            :type nums: List[int]
            :rtype: int
            lenth = len(nums)
            if lenth == 1:
                return nums[0]
            for i in range(0,lenth-2,2):
                if nums[i] != nums[i+1]:
                    return nums[i]
            return nums[lenth-1]

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