Check if two arrays are equal or not

//User function template for C++

// arr : 1st given array
// brr : 2nd given array
// n : size of both the arrays

bool check(vector<ll> arr, vector<ll> brr, int n) {
    //code here
    unordered_map<ll,ll> m;
    for(int i=0;i<n;i++){
        m[arr[i]]++;
    }
    for(int i=0;i<n;i++){
        m[brr[i]]--;
    }
    for(auto i:m){
        if(i.second!=0)
            return false;
    }
    return true;
}