#include<bits/stdc++.h>
using namespace std;
double n,m,sum,maxn=0,minn=9999999;
int main()
{
  cin>>n;
  for(int i=1;i<=n;++i)
  {
  	cin>>m;
  	maxn=max(maxn,m);
  	minn=min(minn,m);
  	sum+=m;
  }
  sum-=maxn;
  sum-=minn;
  sum=sum/(n-2);
  cout<<sum;
  return 0;
}