leetcode:2032. Values ​​that appear in at least two arrays

Difficulty: Easy

Give you three integer arrays nums1, nums2 and nums3, please construct and return an array with different elements, and by at least two arrays appearing in the arrayall values.Elements in an array can be in any order.

Example 1:

Input:nums1 = [1,1,3,2], nums2 = [2,3], nums3 = [3]Output:[3,2]Explanation: All values ​​that appear in at least two arrays are:- 3 , which occurs in all three arrays.- 2 , which appeared in the arrays nums1 and nums2.

Example 2:

Input:nums1 = [3,1], nums2 = [2,3], nums3 = [1,2]Output:[2,3,1]Explanation: All values ​​that appear in at least two arrays are:- 2 , which appeared in the arrays nums2 and nums3 .- 3 , which appeared in the arrays nums1 and nums2.- 1 , which appeared in arrays nums1 and nums3.

Example 3:

Input:nums1 = [1,2,2], nums2 = [4,3,3], nums3 = [5]Output:[]Explanation: There is no value that appears in at least two arrays.

Tip:

• 1 <= nums1.length, nums2.length, nums3.length <= 100

• 1 <= nums1[i], nums2[j], nums3[k] <= 100

Solution:

class Solution:def twoOutOfThree(self, nums1: List[int], nums2: List[int], nums3: List[int]) -> List[int]:_list = []res = []for i in nums1:_list.append(i)for j in nums2:_list.append(j)for k in nums3:_list.append(k)a = set(_list)a = list(a)for s in a:if (s in nums1 and s in nums2 ) or (s in nums1 and s in nums3) or (s in nums2 and s in nums3) or (s in nums1 and s in nums2 and s in nums3):res.append(s)set(res)list(res)return res