// editor1
#include <iostream>
using namespace std;
class statistics {
    private:
    double mean ;
    public:
        statistics() {
            mean = 0;
    }
    statistics(int arr[],int n) {
        int sum = 0;
        for(int i = 0;i<n;i++){
            sum +=arr[i];
            
        }
        statistics(const statistics &obj){
            mean=obj.mean;
        }
        void display(){
            cout<<mean;
        }
    };
int main(){
    int n;
    cin>>n;
    if (n<0){
        cout<<"Invalid input";
        return 0;
    }
    int arr[100];
    for(int i=0;i<n;i++){
        cin>>arr[i]
    }
    statistics s1(arr,n);
    statistics s2 = s1;
    s2.display();
    return 0;
}