#include
#include
void main()
{
int n,i;
float avg,a[100],s,max,min;
do
{
scanf("%d",&n);
} while(n<=0);
while(n>0)
{
s=0.0;
for(i=0;i
scanf("%f",&a[i]);
s+=a[i];
}
max=min=a[0];
for(i=0;i
if(max if(min>a[i]) min=a[i];
}
s=s-max-min;
avg=s/(n-2);
printf("%.2f\n",avg);
scanf("%d",&n);
}
}