#哈希表 #两个数组的交集

intersection-of-two-arrays.cpp

class Solution {
public:
    vector<int> intersection(vector<int>& nums1, vector<int>& nums2) {
        unordered_set<int> same_set;
        unordered_set<int> num1_set(nums1.begin(), nums1.end());
        for (auto num : nums2) {
            if (num1_set.find(num) != num1_set.end())
                same_set.insert(num);
        }

        return vector<int>(same_set.begin(), same_set.end());
    }
};