#include<bits/stdc++.h>
using namespace std;
int f[1004];
int main(){
	double ans=0;
	int n,maxx=-1,minn=99999;
	cin>>n;
	for(int i=0;i<n;i++)
		cin>>f[i];
	for(int i=0;i<n;i++)
		maxx=max(maxx,f[i]),minn=min(minn,f[i]),ans+=f[i];
	ans=ans-maxx-minn;
	ans=ans/(n-2);
	printf("%.2d",ans);
	return 0;
}