#include<iostream>
using namespace std;
int main(){
    int n;
    int tmp;
    double a[1000000]={0};

    cin >> n;
    for(int i = 0; i < n; i++){
        cin >> a[i];
    }

    for(int i = 0; i < n; i++){
        for(int j = i+1; j < n; j++){
            if(a[i] > a[j]){
                tmp = a[j];
                a[j] = a[i];
                a[i] = tmp;
            }
        }
    }

    if(n % 2 == 0){
        cout << (a[n/2-1] + a[n/2])/2 << endl;
    } else {
        cout << a[n/2] << endl;
    }
}