1 #include<cstdio>
 2 int main()
 3 {
 4     int n;
 5     while(scanf("%d",&n)==1)
 6     {
 7         if(n<=2||n>100)return 0;
 8         int maxs=0,mins=10000;
 9         float sum=0;
10         for(int i=0;i<n;i++)
11         {
12             int mm;
13             scanf("%d",&mm);
14             if(mins>mm)mins=mm;
15             if(maxs<mm)maxs=mm;
16             sum=sum+mm;
17         }
18         sum=(sum-maxs-mins)/(n-2);
19         printf("%.2f\n",sum);
20     }
21     return 0;
22 }