if(tst == 2880 && t==85){
            cout << "n is " << n << endl;
            cout << "arr is \n";
            for (int e = 0; e < n; e++) {
                cout << arr[e].first.first << " " << arr[e].first.second << endl;
                arr[e].second = e;
            }
        }
        else if(tst == 2880){
            continue;
        }