108 ms python solution

  • 0
    class Solution(object):
        def missingNumber(self, nums):
            :type nums: List[int]
            :rtype: int
            obj = {}
            for index, val in enumerate(nums):
                if not obj.get(index):
                    obj[index] = 0
                obj[val] = 1
            for i in range(len(nums)):
                if obj.get(i) == 0:
                    return i
            return len(nums)

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