Number 448

https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/

from typing import List

class Solution:
    def findDisappearedNumbers(self, nums: List[int]) -> List[int]:
        """

        """
        max_num = len(nums)
        desired_dict = {i:0 for i in range(1,max_num+1)}
        for i in nums:
            desired_dict[i] = desired_dict[i]+1
        return [i for i in desired_dict.keys() if desired_dict[i]==0]

a = Solution()

print(a.findDisappearedNumbers([4,3,2,7,8,2,3,1]))
print(a.findDisappearedNumbers([1,1]))

[5, 6]
[2]