#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
int a[505];
int main()
{
	freopen("stats.in","r",stdin);
	freopen("stats.out","w",stdout);
	int n,tot=0,k;
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		cin>>a[i];
		tot+=a[i];
	}
	double ans=tot/(double)n;
	double ping;
	if(n%2!=0)
	{
		k=n/2+1;
		ping=(double)a[k];
	}
	else
	{
		k=n/2;
		ping=(double)((a[k]+a[k+1])/2);
	}
	cout.setf(ios::fixed);
	cout.precision(6);
	cout.fill('0');
	cout<<ans<<endl<<ping;
	return 0;
}