Intersection of Two Arrays II (Leetcode 350)

Problem Link: https://leetcode.com/problems/intersection-of-two-arrays-ii/

Using Hashing:

class Solution:
    def intersect(self, nums1: List[int], nums2: List[int]) -> List[int]:
        
        ans=[]
        d1={}
        d2={}
        for i in nums1:
            if(i not in d1):
                d1[i]=1
            else:
                d1[i]+=1
        
        for i in nums2:
            if(i in d1):
                ans.append(i)
                if(d1[i]==1):
                    del d1[i]
                else:
                    d1[i]-=1
                
        return ans     

Using Sorting:

class Solution:
    def intersect(self, nums1: List[int], nums2: List[int]) -> List[int]:
        
        ans=[]
        nums1.sort()
        nums2.sort()
        i=0
        j=0
        while(i<len(nums1) and j<len(nums2)):
            if(nums1[i]<nums2[j]):
                i+=1
            elif(nums2[j]<nums1[i]):
                j+=1
            else:
                ans.append(nums1[i])
                i+=1
                j+=1
        return ans