#include <iostream>
#include <vector>

using namespace std;

int main()
{
    vector< vector<int> > b;

	vector<int> temp;

	temp.push_back(0);
	temp.push_back(1);

	b.push_back(temp);

	cout << "b[0][1] = " << b[0][1] << endl;

	b[0][1] = 5;

	cout << "b[0][1] = " << b[0][1] << endl;

	return 0;
}