// editor
#include<iostream>
using namespace std;
class Stats
{
   public:
   int mean;
   Stats(int arr[],int n)
   {
       int sum 0;
       for(int i=0 ; i<n ;i++)
       {
           sum +=arr[i];
           mean = (float)sum/n;
       }
   }
   Stats(const Stats &s)
   {
       mean = s.mean;
   }
};
int main(){
    int n;
    cin>>n;
    if(n < 0)
    {
        cout<<"Invalid input";
        return 0;
    }
    int arr[n];
    for(int i = 0 ; i < n ; i++)
    {
        cin>>arr[i];
    }
    Stats s1(arr,n);
    Stats s2 = s1;
    cout<<s2.mean;
    return 0;
}