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

int main()
{
	int N;
	cin >> N;
	vector<int> A( N );
	for( int i = 0; i < N; i++ ) {
		cin >> A[i];
	}
	vector<int> B( N );
	for( int i = 0; i < N; i++ ) {
		cin >> B[i];
	}

	int ans = 0;
	int same = -1;
	for( int i = 0; i < N; i++ ) {
		if( same < 0 ) {
			if( A[i] == B[i] ) same = 1;
			else same = 0;
		}
		else if( same ) {
			if( A[i] == B[i] ) same = 1;
			else same = 0;
		}
		else {
			if( A[i] == B[i] ) {
				ans++;
				same = 1;
			}
			else same = 0;
		}
	}
	if( same == 0 ) ans++;

	cout << ans << endl;
}