#include<bits/stdc++.h>
using namespace std;
#define int long long
int k[1145];
bool pai(int a,int b)
{
	return a>b;
}
signed main()
{
	int n;
	cin>>n;
	for (int i=1;i<=n;i++)
	{
		cin>>k[i];
	}
    if (n==0)
    {
        cout<<0;
        return 0;
    }
	sort(k+1,k+1+n,pai);
	int sum=0,x=0,zhii=1,zhij=n;
	while (zhij>zhii)
	{
		sum+=(x-k[zhii])*(x-k[zhii]);
		x=k[zhii];
		zhii++;
		sum+=(x-k[zhij])*(x-k[zhij]);
		x=k[zhij];
		zhij--;
	}
	cout<<sum;
	return 0;
}