#include <iostream>
using namespace std;

int first[150000];
int second[150000];
int third[150000];

bool goodOrder(int a, int b) {
	if(second[a] < second[b] && third[a] < third[b]) return true;
	return false;
}

void inicializace(int n)
{
	for(int i  = 0; i < n; i++) {
    		int tmp;
    		cin >> tmp;
    		second[tmp] = i;
    	}
    	for(int i  = 0; i < n; i++) {
    		int tmp;
    		cin >> tmp;
    		third[tmp] = i;
    	}
}

int main() {
    int n;
    cin >> n;
    
    while(n != 0) {
    	
    	for(int i  = 0; i < n; i++) {
    		cin >> first[i];
    	}
    	
    	inicializace(n);
    	
    	long long count = 0;
    	for(int i = 0; i < n - 1; i++) {
    		for(int j = i + 1; j < n; j++) {
    			if(goodOrder(first[i], first[j])) count++;
    		}
    	}
    	
    	cout << count << endl;
    	
    	cin >> n;
    }
    
    return 0;    
}