class Solution(object):

def findDisappearedNumbers(self, nums):

"""

:type nums: List[int]

:rtype: List[int]

"""

for i in range(len(nums)):

```
nums[abs(nums[i])-1]= -abs(nums[abs(nums[i])-1])
return [f+1 for f in range(len(nums)) if nums[f]>0]
```