349. Intersection of Two Arrays

兩個數組的交集

public class Solution {
    public int[] Intersection(int[] nums1, int[] nums2) {
        //使用哈希集合去重
        HashSet<int> hashSet1=new HashSet<int>(nums1);
        HashSet<int> hashSet2=new HashSet<int>(nums2);
        List<int> list=new
 
 List<int>();
        //遍歷兩哈希集合，相等者加入集合，遍歷結束後將集合轉為數組返回
        foreach(int h1 in hashSet1){
            foreach(int h2 in hashSet2){
                if(h1==h2)list.Add(h1);
            }
        }
        return list.ToArray<int>();
    }
}

LeetCode-C#實現-哈希表(#349)