#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;
}

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