#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,a[110]={0},i,z=0,c=0;
	float p;
	cin>>n;
	for(i=0;i<n;i++){
		cin>>a[i];
	}
    for(i=0;i<n;i++){
    	z=z+a[i];
    	c=i-2;
    	if(a[c]<a[i]){
    		swap(a[i-1],a[i]);
    	}
    }
    cout<<z<<endl;
    p=z/n;
    cout<<fixed<<setprecision(2)<<p;
    for(i=0;i<n;i++){
    	cout<<" "<<a[i];
    }
} 
/**************************************************************
	Problem: 1175
	User: huxuanchen
	Language: C++
	Result: Wrong Answer
****************************************************************/