#include <iostream>
#include <vector>
using namespace std;

int main() 
{

	vector<vector<float>> yy
	{
		{20.0, 20.0},
		{80.0, 80.0},
		{20.0, 80.0},
		{80.0, 20.0}
	};

	for (int i=0; i<yy.size(); i++)
	{
		for (int j=0; j<yy[i].size(); j++)
		{
			cout << yy[i][j] << " ";
		}
		cout << endl;
	}

	return 0;
}