448. Find All Numbers Disappeared in an Array.py

'''
448. Find All Numbers Disappeared in an Array

Given an array nums of n integers where nums[i] is in the range [1, n], return an array of all the integers in the range [1, n] that do not appear in nums.

Example 1:

Input: nums = [4,3,2,7,8,2,3,1]
Output: [5,6]

Example 2:

Input: nums = [1,1]
Output: [2]

'''



class Solution:
    def findDisappearedNumbers(self, nums: List[int]) -> List[int]:
        r=list([i for i in range(1,len(nums)+1)])
        return set(r).difference(set(nums))