#include<iostream>
using namespace std;
double N,big=0,small=0x3f3f3f3f,sum=0,num=0;
double a[114514];
int main()
{
    cin >> N;
    for(int i=1;i<=N;i++){
    cin >> a[i];
    if(a[i]>big)
    a[i] = big;
    if(a[i]<small)
    a[i] = small;
    }
    for(int i=1;i<=N;i++)
    {
    num += a[i];
    sum += a[i];
    }
    sum = sum-big-small;
    num = num/N;
    sum = sum / (N-2);
    cout << sum << num-sum;
}