#include <iostream>
using namespace std;
int main()
{
   int n;
   cin >> n;
   int j = 0;
   int sim = 0;
   int x , y , arr[2*n];

   for ( int i = 0 ; i < 2*n ; i ++ )
   {
      cin >> arr[i];
   }
   
   for ( int c = 0 ; c < n ; c ++ )
   {
      j ++;
      for ( int i = 0 ; i < 2*n ; i ++ )
      {
         if ( arr[i] == j )
         {
            x = i;
             
            for ( int b = i + 1 ; b < 2*n ; b ++ )
            {
               if ( arr[b] == j )
               {
                  y = b;
               }
            }
         }
      }

      if ( x > y )
      {
         sim = sim + ( x - y );
      }

      else
      {
         sim = sim + ( y - x );
      }
   }

   cout << sim;

   return 0;
}