#include<bits/stdc++.h>
using namespace std;
int main(){
	int i,n,a[51],s[51],j=1;
	cin>>n;
	for(i=0;i<n;i++){
		cin>>a[i];
	}
	sort(a,a+n);
	s[n/2]=a[n-1];
	for(i=(n-1)/2-1;i>=0;i--){
		s[n-i-1]=a[n-1-j];
		j++;
		s[i]=a[n-1-j];
		j++;
	}
	for(i=0;i<n;i++){
		cout<<s[i]<<" ";
	} 
	return 0;
}

/**************************************************************
	Problem: 1283
	User: houshanglin
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2076 kb
****************************************************************/