A424.平均年龄

#include<iostream>
#include<cstdio>
using namespace std;
int a[1001];
int main(){
int n;
double sum=0.00;
cin>>n;
for(int i=1;i<=n;i++){
cin>>a[i];
sum+=a[i];
}
double cnt=sum/n;
printf("%.2f",cnt);
}