#include <stdio.h>
#include <stdlib.h>

#define MAX_POINTS 21000
#define HASH_SIZE 65537

int xs[MAX_POINTS], ys[MAX_POINTS];
int hash[3*HASH_SIZE], run = 0;

void hash_add(int x, int y)
{
  int index = abs(x * 1999 + y) % HASH_SIZE, d = 1, s = 0;

  while (hash[3*index] == run && (hash[3*index+1] != x || hash[3*index+2] != y))
    {
      s += d;
      d += 2;
      index = (index + s) % HASH_SIZE;
    }
  hash[3*index] = run;
  hash[3*index+1] = x;
  hash[3*index+2] = y;
}

int hash_find(int x, int y)
{
  int index = abs(x * 1999 + y) % HASH_SIZE, s = 0, d = 1;

  while (hash[3*index] == run)
    {
      if (hash[3*index+1] == x && hash[3*index+2] == y)
	return index;
      s += d;
      d += 2;
      index = (index + s) % HASH_SIZE;
    }
  return -1;
}

int main(void)
{
  int points, i, err;
  long double xc, yc;

  for (;;)
    {
      scanf("%d", &points);
      run++;
      xc = 0; yc = 0;
      if (points == 0) break;
      err = 0;
      for (i = 0; i < points; i++)
	{
	  scanf("%d%d", &xs[i], &ys[i]);
	  xc += xs[i]; yc += ys[i];
	  hash_add(xs[i], ys[i]);
	}
      xc = xc / points; yc = yc / points;
      for (i = 0; i < points; i++)
	{
	  if (hash_find(2*xc - xs[i], 2*yc - ys[i]) == -1)
	    if ((long double)xs[i] != xc || (long double)ys[i] != yc)
	      {
		err = 1;
		break;
	      }
	}
      if (err)
	printf("This is a dangerous situation!\n");
      else
	printf("V.I.P. should stay at (%.1Lf,%.1Lf).\n", xc, yc);
    }
  return 0;
}