#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    double s=0;
    cin>>n;
    int a[11],MAX=0,MIN=32768;
    for(int i=0;i<n;i++){
        cin>>a[i];
    }
    for(int i=0;i<n;i++){
        if(a[i]>MAX){
            MAX=a[i];
        }
    }
    for(int i=0;i<n;i++){
        if(a[i]<MIN){
            MIN=a[i];
        }
    }
    for(int i=0;i<n;i++){
        s+=a[i];
    }
    printf("%.2f",(s-MAX-MIN)/(n-2));
    return 0;
}
/**************************************************************
	Problem: 1168
	User: luyanchen
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2076 kb
****************************************************************/