#include<stdio.h>

int main(){
	int n;
	scanf("%d",&n);
	int ai[n];
	for(int i=0;i<n;i++){
		scanf("%d",&ai[i]);
	}
	int max = ai[0];
	int min = ai[0];
	int a,b;
	for(int k=0;k<n;k++){
		if(max<ai[k]){
			max = ai[k];
			a = k;
		}
		if(min>ai[k]){
			min = ai[k];
			b = k;
		}
	}
	ai[a] = 0;
	ai[b] = 0;
	double sum = 0;
	for(int i=0;i<n;i++){
		sum += ai[i];
	}
	printf("%.2lf\n",sum*1.0/(n-2));
		
	return 0;
}