题目：

题解：

class Solution:
    def findDisappearedNumbers(self, nums: List[int]) -> List[int]:
        n = len(nums)
        for num in nums:
            x = (num - 1) % n
            nums[x] += n
        
        ret = [i + 1 for i, num in enumerate(nums) if num <= n]
        return ret