#include<iostream>
#include<algorithm>
using namespace std;

const int N=1e4+10;

int n,a[N];

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