using System;
using static System.Console;
using static System.Math;
using System.Numerics;
using System.Collections.Generic;
using System.Linq;


namespace AtCoder
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var n = int.Parse(ReadLine());
            //var s = Conasole.ReadLine().Split(' ')
            var a = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
            var b = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
            var ans = 0;
            for (int i = 0; i < n; i++)
            {
                int b_value = b[i];
                int a_num = Array.IndexOf(a, b_value);
                ans += a_num - i;
                a = Swap(a, i, a_num);
            }


            WriteLine(ans);
            Out.Flush();
        }

        public static int[] Swap(int[] a, int n, int m)
        {
            if (n == m)
                return a;
            else
            {
                int i = a[m];
                for (int j = m; j > n; j--)
                {
                    a[j] = a[j - 1];
                }
                a[n] = i;
            }
            return a;
        }


    }



}