1213. Intersection of Three Sorted Arrays

https://leetcode.com/problems/intersection-of-three-sorted-arrays

Description

Given three integer arrays arr1, arr2 and arr3 sorted in strictly increasing order, return a sorted array of only the integers that appeared in all three arrays.

Example 1:

**Input:** arr1 = [1,2,3,4,5], arr2 = [1,2,5,7,9], arr3 = [1,3,4,5,8]
**Output:** [1,5]
**Explanation:** Only 1 and 5 appeared in the three arrays.

Example 2:

**Input:** arr1 = [197,418,523,876,1356], arr2 = [501,880,1593,1710,1870], arr3 = [521,682,1337,1395,1764]
**Output:** []

Constraints:

• 1 <= arr1.length, arr2.length, arr3.length <= 1000

• 1 <= arr1[i], arr2[i], arr3[i] <= 2000

ac