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

/**************************************************************
	Problem: 1218
	User: houshanglin
	Language: C++
	Result: Accepted
	Time:18 ms
	Memory:2072 kb
****************************************************************/