#include <bits/stdc++.h>
using namespace std;
int main(){
    int s=0,b=0,n,i;
    float f,h=0;
    cin>>n;
    int a[n];
    for(i=0;i<n;i++){
        cin>>a[i];
    }
    s=a[0];
    b=a[0];
    for(i=1;i<n;i++){
        if(a[i]>b){
            b=a[i];
        }
        if(a[i]<s){
            s=a[i];
        }
    }
    for(i=0;i<n;i++){
        h=h+a[i];
    }
    h=h-b-s;
    f=h/(n-2);
    printf("%.2f",f);
}
/**************************************************************
	Problem: 1168
	User: jiangyuanfeng
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/