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...
Given two arrays, write a function to compute their intersection. Example 1: Input: nums1 =[1,2,2,1], nums2 =[2,2] Output:[2,2] 1. 2. Example 2: Input: nums1 =[4,9,5], nums2 =[9,4,9,8,4] Output:[4,9] 1. 2. Note: Each element in the result should appear as ...
Given two arrays, write a function to compute their intersection. Example 1: Input: nums1 = [1,2,2,1], nums2 = [2,2] Output: [2,2] Example 2: Input: nums1 = [4,9,5], nums2 = [9,4,9,8,4] Output: [4,9] Note: Each element in the result should appear as many times...
每天一算:Intersection of Two Arrays leetcode上第349号问题:Intersection of Two Arrays 给定两个数组,编写一个函数来计算它们的交集。 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], nums2 = [9,4,9,8,4] 输出: [9,4] 说明:...
Leetcode每日一题:349.intersection-of-two-arrays(两个数组的交集),思路:排序+双指针,也可以用两个set集合,再判断是否相等;staticboolcmp(inta,intb){returna<b;}vector<int>intersection(vector<int>&nums1,vector<int>&nums2){intlen1=nums1.size(),len2=nums2.s
思路解析 解决方案一: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...
Counter计数:如果nums2中的元素在counter中计数大于0,则添加到res中,并且计数减1; classSolution(object):defintersect(self,nums1,nums2):""" :type nums1: List[int] :type nums2: List[int] :rtype: List[int] """fromcollectionsimportCounter ...
[LeetCode] Intersection of Two Arrays 两个数组相交 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.
https://leetcode.com/explore/interview/card/top-interview-questions-easy/92/array/674/leetcode.com/explore/interview/card/top-interview-questions-easy/92/array/674/ Solutions: 1. Sort and merge: We firstly sort the two arrays and use two pointers to compare theelementsin the two arrays ...