#include<cstdio>

#include<cmath>

using namespace std;

#define EPS 0.00000001

struct Point{

	double x,y;

	double length(){

		return sqrt(x*x+y*y);

	}

}a[2010];

typedef Point Vector;

Vector unit(Vector v){

	double l=v.length();

	return (Vector){v.x/l,v.y/l};

}

Vector operator - (const Point &a,const Point &b){

	return (Vector){a.x-b.x,a.y-b.y};

}

Vector operator + (const Point &a,const Point &b){

	return (Vector){a.x+b.x,a.y+b.y};

}

double dot(const Vector &a,const Vector &b){

	return a.x*b.x+a.y*b.y;

}

double Cross(const Vector &a,const Vector &b){

	return a.x*b.y-a.y*b.x;

}

Vector operator * (const double &K,const Vector &v){

	return (Vector){K*v.x,K*v.y};

}

int n;

Point calc(int I){

	double jiao=acos(dot(a[I+1]-a[I],a[I-1]-a[I])/(a[I+1]-a[I]).length()/(a[I-1]-a[I]).length());

	double d=4000.0/tan(jiao/2.0);

	double l=4000.0/sin(jiao/2.0);

	Point p1=a[I]+d*unit(a[I+1]-a[I]);

	Point p2=a[I]+d*unit(a[I-1]-a[I]);

	Point M=(Point){(p1.x+p2.x)/2.0,(p1.y+p2.y)/2.0};

	return a[I]+l*unit(M-a[I]);

}

double DisToSegment(Point P,Point A,Point B)

{

	Vector v1=B-A,v2=P-A,v3=P-B;

	if(dot(v1,v2)<EPS) return v2.length();

	else if(dot(v1,v3)>EPS) return v3.length();

	else return fabs(Cross(v1,v2))/v1.length();

}

Point yuanxins[2010];

bool can[2010];

int main(){

//	freopen("k.in","r",stdin);

	scanf("%d",&n);

	for(int i=1;i<=n;++i){

		scanf("%lf%lf",&a[i].x,&a[i].y);

	}

	a[++n]=a[1];

	for(int i=n;i>=1;--i){

		a[i+1]=a[i];

	}

	a[1]=a[n];

	++n;

	for(int i=2;i<n;++i){

		yuanxins[i]=calc(i);

		can[i]=1;

		for(int j=2;j<n;++j){

//			double tmp=DisToSegment(yuanxins[i],a[j],a[j+1]);

			if(DisToSegment(yuanxins[i],a[j],a[j+1])-4000.0<-EPS){

				can[i]=0;

				break;

			}

		}

	}

	for(int i=2;i<n;++i){

		if(Cross(a[i+1]-a[i],a[i]-a[i-1])>EPS && can[i]){

			Point A=yuanxins[i];

			for(int j=i+1;j<n;++j){

				if(Cross(a[j+1]-a[j],a[j]-a[j-1])>EPS && can[j]){

					Point B=yuanxins[j];

//					double tmp=(B-A).length();

					if((B-A).length()-8000.0>-EPS){

						printf("%.8f %.8f\n%.8f %.8f\n",A.x,A.y,B.x,B.y);

						return 0;

					}

				}

			}

		}

	}

	puts("impossible");

	return 0;

}