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

int x[20000];
int y[20000];

#define INV 1000001

int
main() {
   int N;
   double cx, cy;
   int sx, sy;
   int i, j;

   while(1) {
      scanf("%d\n", &N);
      if (N == 0)
         break;

      sx = 0;
      sy = 0;

      for (i = 0; i < N; i++) {
         scanf("%d %d\n", &x[i], &y[i]);
         sx += x[i];
         sy += y[i];
      }

      cx = sx / (double) N;
      cy = sy / (double) N;

      for (i = 0; i < N; i++) {
         int x1, y1;

         if (x[i] == INV)
            continue;

         x1 = x[i] + 2 * (cx - x[i]);
         y1 = y[i] + 2 * (cy - y[i]);

         for (j = i + 1; j < N; j++) {
            if (x[j] == INV)
               continue;
            if (x[j] == x1 && y[j] == y1) {
               x[j] = INV;
               break;
            }
         }
         if (j == N) {
#if 0
            printf("i = %d, [%d, %d]\n", i, x[i], y[i]);
            printf("        [%d, %d]\n", x1, y1);
#endif
            printf("This is a dangerous situation!\n");
            goto next;
         }
      }
      printf("V.I.P. should stay at (%.2f,%.2f).\n", cx, cy);
next:
   }
   return 0;
}