Source.cpp

vector<vector <long int>> ArrayList;
	long int Nelements, nQueries;
	long int q1, q2, p1, p2;
	cin >> Nelements >> nQueries;
	vector<long int> cList;
	long int a1, a2;
	
	//for(vector <vector<long int>>::iterator it = ArrayList.begin();it != ArrayList.end();++it)
	for (long int i = 0; i < Nelements; i++)
	{
		cList.clear();
		int parameter;
		cin >> parameter;
		for (long int j = 0; j < parameter; j++)
		{
			long int data;
			cin >> data;
			cList.push_back(data);
		}
		ArrayList.push_back(cList);
	}

	cin >> q1 >> q2;
	cin >> p1 >> p2;

	cList = ArrayList.at(q1);
	a1 = cList.at(q2);

	cList.clear();
	cList = ArrayList.at(p1);
	a2 = cList.at(p2);