func_code_string: #include <bits/stdc++.h>   int n, a[200010];   int main() {     scanf( %d , &n);     for (int i = 0; i < n * 2; i++) scanf( %d , a + i);     std::sort(a, a + n * 2);     long long ans = (a[n - 1] - a[0]) * 1ll * (a[n * 2 - 1] - a[n]), tmp;     for (int i = 0; i < n; i++)       if ((tmp = (a[n * 2 - 1] - a[0]) * 1ll * (a[i + n] - a[i + 1])) < ans)         ans = tmp;     printf( %lld n , ans);     return 0;   }   