#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,i,j=0,x=0,s;
	cin>>n;
	int m[n];
	for(i=0;i<n;i++){
		cin>>m[i];
		if(i!=0){
			if(m[i]<m[x]){
				x=i;
			}	
		}
		j+=m[i];
	} 
	s=n;
	for(i=0;i<n;i++){
		if(m[x]==m[i]){
			j-=m[i];
			s--;
		}
	}
	printf("%.1f",1.0*j/s);
	return 0;
}

/**************************************************************
	Problem: 1218
	User: zzz
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/