Method missingNumber

Array/MissingNumber.py:38–53

:type nums: List[int] :rtype: int

(self, nums)

"""
class Solution(object):
    def missingNumber(self, nums):
        """
        :type nums: List[int]
        :rtype: int
        """
        # x = list(set(range(max(nums)+1)) - set(nums))
        # if x:
        #     return x.pop()
        # else:
        #     return max(nums)+1
        all_nums = sum(range(len(nums)+1))
        
        for i in nums:
            all_nums -= i
        
        return all_nums