func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 1e5 + 10, inf = 1e9;   int n;   int a[maxn];   int main() {     cin >> n;     for (int i = 1; i <= n; ++i) cin >> a[i];     sort(a + 1, a + 1 + n);     long long lsum = 0, rsum = 0;     for (int i = 1; i <= n / 2; ++i) lsum += a[i];     for (int i = n / 2 + 1; i <= n; ++i) rsum += a[i];     long long ans = lsum * lsum + rsum * rsum;     cout << ans <<   n ;     return 0;   }   