#include<stdio.h>
int main(){
	int n,i,j,t,s=0;
	scanf("%d",&n);
	int a[n];
	for(i=0;i<n;i++){
		scanf("%d",&a[i]);
		s = s + a[i];
	}
	for(i=0;i<n-1;i++){
		for(j=0;j<n-1-i;j++){
			if(a[j]>a[j+1]){
				t = a[j];
				a[j] = a[j+1];
				a[j+1] = t;
			}
		}
	}
	int min = a[0],k=0;
	for(i=0;i<n;i++){
		if(a[i]==min){
			k++;
		}
	}
	printf("%.1lf",(s-k*min)*1.0/(n-k));
	return 0;
}

/**************************************************************
	Problem: 1218
	User: admin
	Language: C
	Result: Accepted
	Time:19 ms
	Memory:1144 kb
****************************************************************/