【leetcode】349. Intersection of Two Arrays

problem

349. Intersection of Two Arrays

题意，是求解两个数组的交集。

 solution

class Solution {
public:
    vector<int> intersection(vector<int>& nums1, vector<int>& nums2) {
        unordered_set<int> tmp(nums1.begin(), nums1.end());
        vector<int> res;
        for(auto a:nums2)
        {
            if(tmp.count(a))
            {
                res.push_back(a);
                tmp.erase(a);
            }
        }
        return res;
    }
};

 

 

参考

1. Leetcode_349. Intersection of Two Arrays;

完