#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: 15159808820
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2076 kb
****************************************************************/