#include<iostream>
#include<algorithm>
#include<cstdio>
class bod{
	public:
	double x,y;
	bod(){}
	bod(double x,double y):x(x),y(y){}
};
bod* p;
bool operator<(bod a,bod b){
	if(a.x<b.x)
		return 1;
	if(a.x>b.x)
		return 0;
	return a.y<b.y;

}

int main(){

	while(1){
	int n;
	cin>>n;
	if(n==0)
		break;
	p=new bod[n];
	//double x,y;		
	for(int i=0;i<n;i++){
		cin>>p[i].x>>p[i].y;
	}
	double xx=0,yy=0;
	for(int i=0;i<n;i++){
		xx+=p[i].x;
		yy+=p[i].y;
	}
	xx/=double(n);
	yy/=double(n);
	sort(p,p+n);
	for(int i=0;i<n;i++){
		if(lower_bound(p,p+n,bod(2*xx-p[i].x,2*yy-p[i].y))==p+n){
			cout<<"This is dangerous situation!\n";
			goto next;
		
		}
			
			
	}
	printf("V.I.P should stay at (%.1f,%.1f).\n",xx,yy);
	next:;
	delete[]p;
	
	}
}