#include <iostream> #include<algorithm> using namespace std; const int N =10010; int a[N]; int main() { int n; while(cin>>n){ if(n==0)break; for(int i = 0;i<n;i++) scanf("%d",&a[i]); sort(a,a+n); if(n%2==0)cout<<(a[n/2-1]+a[n/2])/2<<endl; else cout<<a[n/2]<<endl; } } // 64 位输出请用 printf("%lld")