#include <bits/stdc++.h>
using namespace std;
int main()
{
int a[11],n,max=1,min=10;
float s=0;
cin>>n;
for(int i=1;i<=n;i++){
        cin>>a[i];
      	s+=a[i];
      	if(	a[i]>max){
      		max=a[i];
      	}
      	if(a[i]<min){
      		min=a[i];
      	}
    } 
    s=s-max-min;
    s/=(n-2.0);
    printf("%.2f",s);
return 0;

}

/**************************************************************
	Problem: 1168
	User: mc002
	Language: C++
	Result: Accepted
	Time:19 ms
	Memory:2072 kb
****************************************************************/