using namespace std;
int main(){
double a,b,s=0;
cin>>b;
for(double i=1;i<=b;i++){
cin>>a;
s+=a;
}
cout<<fixed<<setprecision(4)<<s/b<<endl;
}
#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
int n;
cin>>n;
double num,sum,avrage;
for (int i=1;i<=n;i++)
{
cin>>num;
sum+=num;
}
avrage=sum/n;
printf("%.4lf",avrage );
}
#include <iostream>
#include <math.h>
#include <iomanip>
using namespace std;
#define LL Long Long
const int N=1e5+10;
const int INF=0x3f3f3f3f;
int main()
{
int n;
cin>>n;
double num,sum,avrage;
for (int i=1;i<=n;i++)
{
cin>>num;
sum+=num;
}
avrage=sum/n;
printf("%.4lf",avrage );
}
#include<iostream>
#include<iomanip>
using namespace std;
int main(){
double a,b,c;
cin>>a;
for(int i=1;i<=a;i++)
{
cin>>b;
c+=b;
}
cout<<fixed<<setprecision(4)<<c/a<<endl;
}