#include<bits/stdc++.h> using namespace std; int a[1005]; int main(){ int n; cin>>n; for(int i=1;i<=n;i++){ cin>>a[i]; } sort(a+1,a+n+1); cout<<a[1]<<" "<<a[n]<<" "; if(n/2%2==1) cout<<a[n/4+1]<<" "; else cout<<(a[n/4]+a[n/4+1])/2.0<<" "; if(n%2==1) cout<<a[n/2+1]<<" "; else cout<<(a[n/2]+a[n/2+1])/2.0<<" "; if((n-n/2)%2==1) cout<<a[(n+n/2+1)/2]<<" "; else cout<<(a[(n+n/2+1)/2]+a[(n+n/2+1)/2+1])/2.0<<" "; }