func_code_string: #include <bits/stdc++.h>   using namespace std;   int N;   pair<int, int> a[200002 + 1];   int min(int a, int b) { return a > b ? b : a; }   int abs(int a) { return a < 0 ? -a : a; }   int main() {     cin >> N;     N *= 2;     int b;     for (int i = 0; i < N; i++) {       cin >> b;       a[i] = {b, i};     }     sort(a, a + N);     long long ans = a[0].second + a[1].second;     for (int i = 2; i < N; i += 2) {       ans += min(abs(a[i - 2].second - a[i].second) +                      abs(a[i - 1].second - a[i + 1].second),                  abs(a[i - 1].second - a[i].second) +                      abs(a[i - 2].second - a[i + 1].second));     }     cout << ans <<   n ;     return 0;   }   