#include <bits/stdc++.h>
#define rep(i, n) for(int i=0; i<(int)(n); i++)
using namespace std;
using ll = long long;
using P = pair<int, int>;

int main(){
    int n;
    cin >> n;
    vector<int> a(n), b(n);
    rep(i,n) cin >> a[i];
    rep(i,n) cin >> b[i];
    // rep(i,n) cout << a[i] << " ";
    // // cout << endl;
    // rep(i,n) cout << b[i] << " ";
    // cout << endl;
    int ans = 0, id = 0;
    while(a != b){
        int s;
        rep(i,n){
            if(a[id] == b[i] && i != id){
                ans += abs(id - i);
                s = b[i];
                rep(id,i+1) b[id+1] = b[id];
                b[id] = s;
                id++;
            }else{
                id++;
            }
        }
    }
    cout << ans << endl;
    return 0;
}