1 #include <iostream>
2 #include <iomanip>
3 using namespace std;
4
5 int main()
6 {
7 int n;
8 double max,min,sum,aver;
9 double a[110] = {0};
10 while (cin >> n)
11 {
12 for (int i = 0; i<n; i++)
13 {
14 cin >> a[i];
15 }
16 max = min = a[0];
17 sum = 0;
18 for (int i = 0; i<n; i++)
19 {
20 if (a[i]<=min)
21 {
22 min = a[i];
23 }
24 if (a[i]>=max)
25 {
26 max = a[i];
27 }
28 sum += a[i];
29 }
30 aver = (double)(sum-max-min)/(n-2);
31 cout<<setprecision(2)<< setiosflags(ios::fixed)<< aver <<endl;
32 }
33 return 0;
34 }
