comefrom: <doocs>0448.Find All Numbers Disappeared in an Array_1.py
code: def findDisappearedNumbers( nums: List[int]) -> List[int]:
      for num in nums:
          idx = abs(num) - 1
          if nums[idx] > 0:
              nums[idx] *= -1
      return [i + 1 for i, v in enumerate(nums) if v > 0]
masked: def sample_funcname ( var_0 : List [ int ] ) -> List [ int ] :
      for var_3 in var_0 :
          var_6 = abs ( var_3 ) - 1
          if var_0 [ var_6 ] > 0 :
              var_0 [ var_6 ] *= - 1
      return [ var_8 + 1 for var_8 , var_10 in enumerate ( var_0 ) if var_10 > 0 ]
  