# [349. Intersection of Two Arrays](https://leetcode.com/problems/intersection-of-two-arrays/) ## 题目 Given two arrays, write a function to compute their intersection. Example 1: ```c Input: nums1 = [1,2,2,1], nums2 = [2,2] Output: [2] ``` Example 2: ```c Input: nums1 = [4,9,5], nums2 = [9,4,9,8,4] Output: [9,4] ``` Note: - Each element in the result must be unique. - The result can be in any order. ## 题目大意 找到两个数组的交集元素,如果交集元素同一个数字出现了多次,只输出一次。 ## 解题思路 把数组一的每个数字都存进字典中,然后在数组二中依次判断字典中是否存在,如果存在,在字典中删除它(因为输出要求只输出一次)。