#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,ai[11]={0},i,h=0,a=0,b=10;
	float c;
	cin>>n;
	for(i=0;i<n;i++){
		cin>>ai[i];
		h=h+ai[i];
	}
	for(i=0;i<n;i++){
		if(ai[i]>a){
			a=ai[i];
		}
		else{
			a=a;
		}
	}
	for(i=0;i<n;i++){
		if(ai[i]<b){
			b=ai[i];
		}
		else{
			b=b;
		}
	}
	h=h-a-b;
	c=h/(n-2);
	printf("%.2f",c);
}

/**************************************************************
	Problem: 1168
	User: zengyixuan
	Language: C++
	Result: Wrong Answer
****************************************************************/