3 line python

[tewujianke]

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]