#include<bits/stdc++.h>
using namespace std;
int h[10000],now,ans,n;
int main(){
	cin>>n;
	for(int i=0;i<n;i++){
		cin>>h[i];
	}
	sort(h,h+n);
	int l=0,r=n-1;
	now=0;
	while(l<=r){
		ans+=(now-h[r])*(now-h[r]);
		now=h[r];
		--r;
		
		ans+=(now-h[l])*(now-h[l]);
		now=h[l];
		++l;
	}
	cout<<ans;
	return 0;
}