#include <iostream>
using namespace std;
int main()
{
    int n;
    cin >> n;
    int arr[2*n];

    for ( int i = 0 ; i < 2*n ; i ++ )
    {
        cin >> arr[i];
    }

   int z = n;
   int one = 0;
   int two = 0;
   int sum = 0;
  for ( int i = 0 ; i < n ; i ++ )
  {
      for ( int v = 0 ; v < 2*n ; v ++ )
      {
         if ( arr[v] == z )
         {
           one = v;
           break;
         }
      }   

      for ( int h = 0 ; h < 2*n ; h ++ )
      {
         if ( arr[h] == z && h != one )
         {
            two = h;
            break;
         }
      }

      z --;
      sum = sum + abs(one - two);
      
  }



   cout << sum;



    return 0;
}