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:
AC code:
class Solution {
public:
vector<int> intersection(vector<int>& nums1, vector<int>& nums2) {
int len1 = nums1.size();
int len2 = nums2.size();
vector<int> ans;
map<int, int> mp;
if (len1 == 0 || len2 == 0) return ans;
for (int i = 0; i < len1; ++i) {
mp[nums1[i]] = 1;
}
for (int i = 0; i < len2; ++i) {
if (mp[nums2[i]] == 1) {
ans.push_back(nums2[i]);
mp[nums2[i]]--;
}
}
return ans;
}
};
349. Intersection of Two Arrays
原文：https://www.cnblogs.com/ruruozhenhao/p/9880043.html