#include <iostream>
#include <vector>
#include <string>
#include <sstream>
using namespace std;
 
class Point
{
	int x;
	int y;
 
public:
	Point(int x = 0, int y = 0) : x(x), y(y)
	{
 
	}
 
	std::string string()
	{
		std::stringstream ss;
 
		ss << x;
		ss << ", ";
		ss << y;
 
		return ss.str();
	}
};
 
void print(const std::vector<Point> &points)
{
	for (Point p : points)
	{
		std::cout << p.string() << std::endl;
	}
}
 
int main() {
	std::vector<Point> points(3);
 
	print(points);
 
	for (int i = 0; i < points.size(); ++i)
	{
		points.at(i) = Point(1, 1);
	}
 
	print(points);
 
	return 0;
}

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