#include <iostream>
#include <vector>
using namespace std;
int main(int argc, char* argv[])
{
	int N,i;
	cin>>N;
	vector<int> A(N),B(N);
	for (i=0;i<N;i++){
		cin>>A[i];
	}
	for (i=0;i<N;i++){
		cin>>B[i];
	}
	int ans=0;
	for (i=0;i<N;i++){
		if (A[i]==B[i]){
			continue;
		}
		ans++;
		int j;
		for (j=i+1;j<N;j++){
			if (A[j]!=B[j]){
				continue;
			}
			break;
		}
		i=j;
	}
	cout<<ans<<endl;
	return 0;
}