int GroupOfNumbers::median_of_median_of_5(int left, int right)
   {
	   GroupOfNumbers medians(0, 0, 0);
	   for(int i = left; i + 5 <= right; i+=5)
	   {
		   medians.add(linearSelect(i, i + 4, 3));
	   }
	   return medians.linearSelect(0, medians._total, medians._total/2);
   }