//10米跳水计分系统
int main(){
int score[10];
int min,max;
float sum;
scanf("%d",&score[0]);
min = max = score[0];
for (int i = 1;i < 10;i ++){
scanf("%d",&score[i]);
sum += score[i];
if (min > score[i])
min = score[i];
else if (max < score[i])
max = score[i];
}
sum -= ( max - min );
printf("%f",sum/8);
}