349. Intersection of Two Arrays -E

Given two arrays, write a function to compute their intersection.

Example 1:

Input: nums1 = [1,2,2,1], nums2 = [2,2]
Output: [2]

Example 2:

Input: nums1 = [4,9,5], nums2 = [9,4,9,8,4]
Output: [9,4]

Note:

• Each element in the result must be unique.
• The result can be in any order.

A

class Solution {
public:
    vector<int> intersection(vector<int>& nums1, vector<int>& nums2) {
        set<int> m1;
        for(auto v : nums1)
        {
            m1.insert(v);
        }
        vector<int> res;
        for(auto v : nums2)
        {
            if(m1.find(v) != m1.end())
            {
                auto it = m1.find(v);
                res.push_back(v);
                m1.erase(v);
            }
        }
        return res;
    }
};