Find Missing Number

    public:
    vector<long long> findMissing(long long A[], long long B[],
                 int N, int M)
    {
        vector<long long>hsh1(1e12,0);
        vector<long long>hsh2(1e12,0);
        for(int i=0; i<1e12; i++){
            hsh1[A[i]+1e6]++;
        }
        for(int i=0; i<1e12; i++){
            hsh2[B[i]+1e6]++;
        }
        for(int i=0; i<1e12; i++){
            if(hsh1[i]>0 && hsh2[i]==0){
                cout<<i<<endl;
            }
            else if(hsh1[i]==0 && hsh2[i]>0){
                cout<<i<<endl;
            }
        }


    }