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The sum of the unique elements of the daily question

2022-07-05 05:42:00 【A big pigeon】

For integer array nums Element summation, which only occurs once in .

class Solution:
    def sumOfUnique(self, nums: List[int]) -> int:
        cnt = Counter(nums)
        return sum(k for k,v in cnt.items() if v == 1)

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