#include<iostream>
using namespace std;

class statistics{
    public:
    int mean;
    
    statistics(int arr[],int n){
        int sum=0;
        for(int i= 0;i<n;i++){
            sum +=arr[i];
        mean = (float)sum/n;
        }
        
    statistics(const statistics &s){
        mean = s.mean;
    }
};

int main(){
    int n;
    cin>>n;
    if(n<0){
        cout<<"Invalid input";
    }
    int arr[n];
    for(int i =0;i<n;i++){
        cin>>arr[i];
    }
    statistics s1(arr,n);
    statistics s2=s1;
    
    cout<<s2.mean;
}