#include <iostream>
#include <algorithm>

using namespace std;

const int MAXN = 10000 + 10;

int arr[MAXN];

int main () {
	int n;
	while (cin >> n && n != 0){
		for (int i = 0; i < n; i++){
			cin >> arr[i];
		}
		sort (arr, arr + n);
		int mediumNum = 0;
		if (n % 2 == 0){
			mediumNum = (arr[n / 2] + arr[n / 2 - 1]) / 2;
		}else{
			mediumNum = arr[n / 2];
		}
		cout << mediumNum << endl;
	}
	return 0;
}