func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAXN = 1000;   int a[MAXN];   int n;   int main() {     scanf( %d , &n);     n *= 2;     for (int i = 1; i <= n; ++i) scanf( %d , &a[i]);     sort(a + 1, a + n + 1);     int ans = 1e9;     for (int j = 1; j <= n; ++j)       for (int k = j + 1; k <= n; ++k) {         int t = 0;         for (int i = 1; i < n;) {           while (i == j || i == k) ++i;           int p = i + 1;           while (p == j || p == k) ++p;           t += a[p] - a[i];           i = p + 1;         }         ans = min(t, ans);       }     printf( %d , ans);     return 0;   }   