#include <bits/stdc++.h>
using namespace std;

int main() {
	int N;
	cin >> N;
	int a[1001000];
	int b[1001000];
	for (int i = 0; i < N; i++) {
		cin >> a[i];
	}
	for (int i = 0; i < N; i++) {
		cin >> b[i];
		//cout<<i<<" "<<a[i]<<" "<<b[i]<<endl;
	}
	int cnt = 0;
	int flag = 1;
	for (int i = 0; i < N; i++) {
		//cout<<i<<" "<<flag<<" "<<a[i] <<" "<<b[i]   <<endl;
		if (flag == 1 && a[i] != b[i]) {
			flag = 0;
			cnt++;
		}
		else if (flag == 0 && a[i] == b[i]) {
			flag = 1;
		}
	}
	cout << cnt << endl;

	return 0;
}