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...
LeetCode题解之 Intersection of Two Arrays 1、题目描述 2、问题分析 借助于set来做。 3、代码 1 class Solution { 2 public: 3 vector<int> intersection(vector<int>& nums1, vector<int>& nums2) { 4 vector<int> res; 5 set<int> s1; 6 set<int> s2; 7 for( auto & n : nums1) 8 s1...
What if elements of nums2 are stored on disk, and the memory is limited such that you cannot load all elements into the memory at once? 思路: Solution 1: 这道题就是Intersection of Two Arrays的加强版。同样用HashMap来做。需要考虑在intersection中重复的次数。 代码如下: public class Solution ...
LeetCode.349--intersection-of-two-arrays 一、题目链接 两个数组的交集 二、题目描述 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...
Leetcode 350:Intersection of Two Arrays II Given two arrays, write a function to compute their intersection. 说人话: 求两个数组的交集。 举例1: 举例2: [法1] Map 记录频次 思路 因为是求交集,所以元素出现的次数是需要进行考虑了。这里笔者考虑到用 Map 这个集合框架来解决这个问题,主要是基于 key-...
350. 两个数组的交集 II Intersection of Two Arrays II难度:Easy| 简单 相关知识点:排序 哈希表 双指针 二分查找题目链接:https://leetcode-cn.com/problems/intersection-of-two-arrays-ii/官方题解:https://leetcode-cn.com/problems/intersection-of-
If the two elements are the same, forward both pointers and put the element to the return array If the two elements are not the same, move the smaller one's pointer forward Keep doing the above two steps until it hit the end of any one of the arrays. class Solution: def intersect(se...
这是Intersection of Two Arrays的加强版，同样使用HashMap。需要考虑交集中的重复次数。代码如下，时间复杂度为O(m+n）。解决方案二：思路为先对两个数组进行排序，然后使用两个指针分别指向nums1[]和nums2[]的开头，遇到相同的数字就加到ArrayList里，两个指针都增加，不相同则小的指针增加。重复操作...
Finding the Union, Intersection, or Difference of Two Arrays (PHP Cookbook)David SklarAdam Trachtenberg
If you combine a string array with a character vector or cell array of character vectors, thenCis a string array. Index toA, returned as a column vector when the'legacy'flag is not specified.iaidentifies the values (or rows) inAthat are common toB. If there is a repeated value (or row...