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#include <fstream>
#include <vector>

using namespace std;

struct point {
	float x;
	float y;
};

int main() {
	point poin;
	ifstream in("input.txt");
	int n;
	in >> n;
	vector<point> points(n);
	for (int i = 0; i < n; i++) {
		in >> points[i].x >> points[i].y;
	}
	in.close();
}