#include <bits/stdc++.h>
using namespace std;
int main(){
    int n,ma,mi,i,a[15]={};
    float h=0;
    cin>>n;
    for(i=0;i<n;i++){
        cin>>a[i];
    }
    ma=a[0];
    mi=a[0];
    for(i=1;i<n;i++){
        if(ma<a[i]){
            ma=a[i];
        }
        if(mi>a[i]){
            mi=a[i];
        }
    }
    for(i=0;i<n;i++){
        h=h+a[i];
    }
    h=h-ma-mi;
    h=h/(n-2);
    printf("%.2f",h);
}
/**************************************************************
	Problem: 1168
	User: wengzihang
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2076 kb
****************************************************************/