/* Height Data */
int nrows, ncols;
int ** heights;

/* Read Height Data */
void read_heights() {
   int i,j,h;

   scanf("%d\n", &nrows);
   scanf("%d\n", &ncols);

   heights = (int **) malloc(nrows * sizeof(int *));
   if (heights == NULL) exit(1);

   for (i=0; i<nrows; i++) {
      heights[i] = (int *)malloc(ncols * sizeof(int));
      if (heights[i] == NULL) exit(1);
   }

   for (j=0; j<ncols; j++) {
      for (i=0; i<nrows; i++) {
         scanf("%d\n",&h);
	 heights[i][j] = h;
      }
   }
   return;
}