先将两数组排序,然后使用双指针,依次判断两数组中的元素是否相等,如果某个元素大于或小于另外一个元素,则将指针向后移动,如果相等,则将元素放入ArrayList中,然后将ArrayList中的元素迭代放入数组,最后返回。 因为使用Arrays类的sort方法,所以时间复杂度是O(n log(n)),空间复杂度是O(n)。 publicint[]intersect(int...
2、分析 给定两个数组,编写一个函数来计算它们的交集。 这道题和上道题很像,但是相比较而言,上道题只需要输出重复的一个元素就行,所以上道题可以采用set。这道题可以将数组nums1存入一个哈希表,数组的值和这个值出现的次数构成一组对应元素,然后遍历数组2,如果哈希表中这个值为0代表没有这个元素,如果不为0则...
代码实现: classSolution{public:vector<int>intersect(vector<int>&nums1,vector<int>&nums2){unordered_map<int,int>map1;vector<int>ans;for(auto&num_1:nums1)map1[num_1]++;for(auto&num_2:nums2){if(map1[num_2]>0){ans.push_back(num_2);map1[num_2]--;}}returnans;}}; 结果: 结果...
代码 1// 350. Intersection of Two Arrays II 2// https://leetcode.com/problems/intersection-of-two-arrays-ii/description/ 3// 时间复杂度: O(nlogn) 4// 空间复杂度: O(n) 5class Solution { 6public: 7 vector<int>intersect(vector<int>& nums1, vector<int>& nums2) { 8 9 map<int,...
Given two arrays, write a function to compute their intersection. Example: Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2, 2]. Note: Each element in the result should appear as many times as it shows in both arrays. The result can be in any order. 给出两个数组,...
先对字符串1生成hash结果,统计每个字符出现的次数。然后遍历字符串2,如果字符串2中的字符出现在字符串1中,则减少hash结果中该字符的次数,并且把这个字符加入到结果集合中。这里如果要对中间结果的空间进行节省,建议对字符串长度短的那个进行hash(并不能保证短的那个出现的字符少,但通常这样认为)。
https://leetcode.com/problems/intersection-of-two-arrays-ii/ Given two arrays, write a function to compute their intersection. Example: Givennums1=[1,2,2,1],nums2=[2,2], return[2,2]. Note: Each element in the result should appear as many times as it shows in both arrays. ...
Intersection of Two Arrays II in Python - Suppose we have two arrays A and B, there are few elements in these array. We have to find the intersection of them. So if A = [1, 4, 5, 3, 6], and B = [2, 3, 5, 7, 9], then intersection will be [3, 5]To solve th
Intersection of Two Arrays I Problem Given two arrays, write a function to compute their intersection. Example Givennums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2]. Note Each element in the result must be unique. The result can be in any order. ...
https://leetcode.com/problems/intersection-of-two-arrays/ 中文版描述 给定两个数组 nums1 和 nums2 ,返回 它们的交集 。输出结果中的每个元素一定是 唯一 的。我们可以 不考虑输出结果的顺序。 示例1: 输入:nums1 = [1,2,2,1], nums2 = [2,2] 输出:[2] 示例2: 输入:nums1 = [4,9,5], ...