func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, a[12345];   int calc(int x, int y) {     int ret = 0;     vector<int> v;     for (int i = 0; i < 2 * n; ++i) {       if (i != x && i != y) v.push_back(a[i]);     }     for (int i = 0; i < v.size(); i += 2) ret += abs(v[i] - v[i + 1]);     return ret;   }   int main() {     cin >> n;     int mn = 1e9, i;     for (i = 0; i < 2 * n; i++) cin >> a[i];     sort(a, a + 2 * n);     for (int i = 0; i < n * 2; i++) {       for (int j = i + 1; j < n * 2; j++) {         mn = min(mn, calc(i, j));       }     }     cout << mn;   }   