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

/**************************************************************
	Problem: 1168
	User: LYY001
	Language: C++
	Result: Accepted
	Time:19 ms
	Memory:2072 kb
****************************************************************/