# include <stdio.h>

int main(void)
{
	int n,i;
	int a[20];
	float sum = 0;
	float x;
	scanf("%d",&n);
	for (i = 0;i < n; ++i)
	{
	    scanf("%d",&a[i]);
	    sum += a[i];
	}
	int max = 0,min = 0;
	for (i = 0;i < n;++i)
	{
		if(a[i] > a[max])
		max = i;
		if(a[i] < a[min])
		min = i;
	}
    x = (sum-a[max]-a[min])/(n-2);
	printf("%.2f",x);
	return 0;
     
}