#include <stdio.h>

int n;
int x[20000],y[20000];
unsigned char pouz[20000];
int minx,miny,maxx,maxy,xx,yy;
int poc;

int test(int kt)
{
int i;

pouz[kt]=poc;
if((-x[kt]+xx==(float) xx/2)&&(-y[kt]+yy==(float) yy/2))
	return(0);
for(i=kt+1;i<n;i++)
	if(pouz[i]==0)
		if((-x[kt]+xx==x[i])&&(-y[kt]+yy==y[i]))
		{
			pouz[i]=poc;
			return(0);
		}
return(1);
}
int main(void)
{
int i;

scanf("%d",&n);
while(n!=0)
{
	poc=1;
	i=0;
	scanf("%d%d",x+i,y+i);
	minx=x[0];
	maxx=x[0];
	miny=y[0];
	maxy=y[0];
	for(i=1;i<n;i++)
	{
		poc++;
		scanf("%d%d",x+i,y+i);
		if(minx>x[i])
			minx=x[i];
		if(maxx<x[i])
			maxx=x[i];
		if(miny>y[i])
			miny=y[i];
		if(maxy<y[i])
			maxy=y[i];
	}
	memset(pouz,0,n);
	xx=maxx+minx;
	yy=maxy+miny;
	for(i=0;i<n;i++)
		if(pouz[i]==0)
			if(test(i)==1)
				break;
	if(i==n)
		printf("V.I.P. should stay at (%.1f,%.1f).\n",xx/2.0,yy/2.0);
	else
		printf("This is a dangerous situation!\n");
/*	for(i=0;i<n;i++)
		printf("%d",(int) pouz[i]);
	printf("\n");*/


scanf("%d",&n);
}


return(0);
}