杭电ACM 2014

#include<stdio.h>

int main()
{
    int i,n,a[100],max,min;
    double av,sum;

    while(scanf("%d",&n)!=EOF)
    {
         for(i=0;i<n;i++)
        {
            scanf("%d",&a[i]);
        }

        sum=0.0;
        max=a[0];
        min=a[0];


        for(i=0;i<n;i++)
        {
            if(a[i]>max)
            {
                max=a[i];
            }
            if(a[i]<min)
            {
                min=a[i];
           
            }
       
            sum+=a[i];
        }
        av=((sum-max-min)/(n-2));
       
      

           printf("%.2f\n",av);
       
   
    }
   

    return 0;
}