#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
using namespace std;
using ll = long long;
using P = pair<int,int>;

int main() {
  int n;
  cin >> n;
  vector<int> a(n), b(n);
  rep(i, n) cin >> a[i];
  rep(i, n) cin >> b[i];

  int ans = 0;
  bool differ = false;
  rep(i, n) {
    if (differ && a[i] == b[i]) differ = false;
    else if (!differ && a[i] != b[i]) {
      differ = true;
      ++ans;
    }
  }
  cout << ans << endl;
  return 0;
}