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

// コンテスト中のみ
//#define int long long

#define ll long long
#define rep(i,n) for(int i = 0; i < (n); i++)
#define P pair<ll,ll>
#define ld long double
ll INF = (1LL << 60);
int MOD = 1000000007;


signed main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	ll N; cin >> N;
	vector<ll>A(N), B(N); rep(i, N)cin >> A[i];
	rep(i, N)cin >> B[i];
	bool now = false;
	ll ans = 0;
	rep(i, N) {
		if (A[i] != B[i]) {
			now = true;
		}
		else {
			if (now) {
				ans++; now = false;
			}
		}
	}if (now) {
		ans++; now = false;
	}
	cout << ans << endl;
	return 0;
}