#include<bits/stdc++.h>
using namespace std;
int main(){
	int max=0,mis=0,a[30]={},n,i;
	float h=0;
	cin>>n;
	for(i=0;i<n;i++){
		cin>>a[i];
	}
	max=a[0];
	mis=a[0];
	for(i=1;i<n;i++){
		if(max<a[i]){
			max=a[i];
		}
		if(mis>a[i]){
			mis=a[i];
		}
	}
	for(i=0;i<n;i++){
		h=h+a[i];	
	}
	h=h-max-mis;
	h=h/(n-2);
	printf("%.2f",h);
	
	
}

/**************************************************************
	Problem: 1168
	User: caiqiaoxi
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2076 kb
****************************************************************/