#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: hongjiaming
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/