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[]intersection3(int[] nums1,int[] nums2){ Set<Integer>set=newHashSet<>(); Arrays.sort(nums1); Arrays.sort(nums2);inti =0;intj =0;while(i < nums1.length && j < nums2.length) {if(nums1[i...
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...
Given two arrays, write a function to compute their intersection. Example: Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2]. Note: 1、Each element in the result must be unique. 2、The result can be in any order. 要完成的函数: vector<int> intersection(vector<int>& ...
1// 349. Intersection of Two Arrays 2// https://leetcode.com/problems/intersection-of-two-arrays/description/ 3// 时间复杂度: O(nlogn) 4// 空间复杂度: O(n) 5class Solution { 6public: 7 vector<int> intersection(vector<int>& nums1, vector<int>& nums2) { 8 9 set<int> record(...
https://leetcode.com/problems/intersection-of-two-arrays/discuss/81969/Three-Java-Solutions Given two arrays, write a function to compute their intersection. Example 1: AI检测代码解析 Input: nums1 =[1,2,2,1], nums2 =[2,2] Output:[2] ...
[i])){map.put(nums1[i],1);}else{map.put(nums1[i],map.get(nums1[i])+1);}}for(inti=0;i<length2;i++){if(map.containsKey(nums2[i])&&map.get(nums2[i])!=0){map.put(nums2[i],map.get(nums2[i])-1);ret[index++]=nums2[i];}}returnArrays.copyOfRange(ret,0,index);...
In this tutorial, we'll learn how to retrievethe intersection of twoLists. Like many other things, this has become much easier thanks to the introduction ofstreams in Java 8. 2. Intersection of Two Lists of Strings Let's create twoLists ofStrings with some intersection — both having some...
HashSetset2=newHashSet<>(Arrays.asList(arr2)); set1.retainAll(set2); System.out.println(set1); } } Programming questions on arrays Conclusion I have explained multiple approaches to find intersection of two arrays in Java and discussed their time complexity. If you want to discuss any ot...
leetcode【数组】---349. Intersection of Two Arrays(两个数组的交集),程序员大本营,技术文章内容聚合第一站。
Intersection of Two Arrays 题目Given two arrays, write a function to compute their intersection. Note: Each element in the result must be unique. The result can be in any order. 解析 求两个数组的交集,如果用java中的set来实现的话,此题就没有什么难度。但是用C语言的话还是......