#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template <class T>
using V = vector<T>;
template <class T, class U>
using P = pair<T, U>;
using vll = V<ll>;
using vvll = V<vll>;
template <class T>
inline bool chmax(T& a, T b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
template <class T>
inline bool chmin(T& a, T b) {
  if (a > b) {
    a = b;
    return true;
  }
  return false;
}
constexpr ll MOD = 1000000007;
constexpr ll HIGHINF = (ll)1e18;
constexpr int INF = 1e9;
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  int n;
  cin >> n;
  V<int> a(n);
  for (int i = 0; i < n; i++) cin >> a[i];
  sort(a.begin(), a.end());
  ll ans = 0;
  for (int i = 0; i < n / 2; i++) {
    ans += ll(a[i] + a[n - i - 1]) * ll(a[i] + a[n - i - 1]);
  }
  cout << ans << '\n';
  return 0;
}
