#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
****************************************************************/