Check if two arrays are equal or not.cpp

#include<bits/stdc++.h>
using namespace std;
#define ll long long 

// } Driver Code Ends
//User function template for C++

class Solution{
    public:

    //Function to check if two arrays are equal or not.
    bool check(vector<ll> A, vector<ll> B, int N) {
        //code here
         unordered_map<ll, int> freqA, freqB;

        // Count the frequency of elements in the first array.
        for (int i = 0; i < N; i++) {
            freqA[A[i]]++;
        }

        // Count the frequency of elements in the second array.
        for (int i = 0; i < N; i++) {
            freqB[B[i]]++;
        }

        // Check if the frequencies of each element are the same in both arrays.
        for (auto& entry : freqA) {
            ll key = entry.first;
            if (freqA[key] != freqB[key]) {
                return false;
            }
        }

        return true;
    
    }
};

//{ Driver Code Starts.
int main()
 {
    int t;
    cin>>t;
    while(t--) {
        int n;
        cin>>n;
        
        vector<ll> arr(n,0),brr(n,0);
        
        // increase the count of elements in first array
        for(ll i=0;i<n;i++)
            cin >> arr[i];
        
        
        // iterate through another array
        // and decrement the count of elements
        // in the map in which frequency of elements
        // is stored for first array
        for(ll i=0;i<n;i++)
            cin >> brr[i];
        Solution ob;
        cout << ob.check(arr,brr,n) << "\n";
    }
	return 0;
}
// } Driver Code End