#include<stdio.h>
#include<stdlib.h>
int main()
{
int i,j;
double max,min,num;
double a[15];
while(scanf("%lf",&a[1])!=-1)
{
max=999999;
min=-999999;
for(i=2;i<=10;i++)
{
scanf("%lf",&a[i]);
num+=a[i];
}
for(j=1;j<=10;j++)
{
if(min<a[j])
min=a[j];
if(max>a[j])
max=a[j];
}
printf("%.3lf\n",((num+a[1])-(max+min))/8);
}
return 0;
}