#include <bits/stdc++.h>
using namespace std;
long long a[1000],n,i,t;
int main()
{
cin>>n;
for (i=1; i<=n; i++) cin>>a[i];
t=0;
for (i=1; i<=n; i++)
if (i%2!=0) t+=a[i]*a[i];
cout<<t<<endl;
for (i=1;i<=n; i++)
if (a[i]<0) cout<<a[i]<<" ";
cout<<endl;
sort(a+1,a+n+1);
for (i=n; i>=1; i--)
cout<<a[i]<<" ";
return 0;
}