#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    double s=0;
    int a[15];
    cin >> n;
    for (int i=0;i<n;i++) cin >> a[i];
    int mx=a[0],mi=a[0];
    for(int i=0;i<n;i++)
    {
        if(a[i]>mx) mx = a[i];
        if(a[i]<mi) mi = a[i];
        s += a[i];
    }
    s = s - mx - mi;
    printf("%.2f",(s/(n-2)));
	return 0;
}
/**************************************************************
	Problem: 1168
	User: mariooo
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/