func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(false);     cin.tie(0);     int n, nn;     cin >> n;     nn = n * 2;     vector<int> arr(nn);     for (int i = 0; i < nn; ++i) cin >> arr[i];     sort(arr.begin(), arr.end());     long long ans, now;     ans = arr[nn - 1] - arr[n];     ans *= arr[n - 1] - arr[0];     for (int i = 1; i < n; ++i) {       now = arr[n - 1 + i] - arr[i];       now *= arr[nn - 1] - arr[0];       ans = min(ans, now);     }     cout << ans;   }   