#include<bits/stdc++.h>
using namespace std;
void read(int &h){
    char o;
    int x=0,y=1;
    o=getchar_unlocked();
    while(!(o<='9'&&o>='0')){
        if(o=='-'){
            y=-1;
        }
        o=getchar_unlocked();
    }
    while(o<='9'&&o>='0'){
        x*=10;
        x+=o-'0';
        o=getchar_unlocked();
    }
    h=x*y;
    return ;
}
int n;
int a[10000];
long long ans;
int l,r;
int main(){
    ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    read(n);
    for(int i=1;i<=n;i++){
        read(a[i]);
    }
    sort(a+1,a+n+1);
    l=0,r=n;
    while(l<r){
        ans+=(a[l]-a[r])*(a[l]-a[r]);
        l++;
        ans+=(a[l]-a[r])*(a[l]-a[r]);
        r--;
    }
    cout<<ans;
    return 0;
}

#include <bits/stdc++.h>

using namespace std;


int main()
{
  int n;
  cin>>n;
  int h[n];
  for(int i = 0;i<n;++i)
  {
    cin>>h[i];
  }
  sort(h,h+n);
  int l = 0,r = n-1;
  long long  sum = h[r]*h[r];
  int flag = 1;
  while(l<r)
  {
    sum +=(h[r]-h[l])*(h[r]-h[l]);
    if(flag%2) 
    r--;
    else 
    l++;
    flag++;
  }
  cout << sum << endl;
  return 0;
}