#include <bits/stdc++.h> using namespace std; int main() { int n; while(cin>>n){ if(n==0)return 0; vector<int>v; while(n--){ int temp;cin>>temp; v.push_back(temp); } sort(v.begin(),v.end()); if(v.size()%2==1)//奇数 cout<<v[v.size()/2]<<endl; else cout<<(v[v.size()/2]+v[v.size()/2-1])/2<<endl; } } // 64 位输出请用 printf("%lld")