#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n;
  cin >> n;
  vector<int> a(n), b(n);
  rep(i, n) cin >> a[i];
  rep(i, n) cin >> b[i];
  vector<pair<bool, int>> rle(1, { a[0] == b[0], 0 });
  rep(i, n) {
    bool state = a[i] == b[i];
    if (rle.back().first == state) {
      rle.back().second++;
    }
    else {
      rle.push_back({ state, 1 });
    }
  }
  int ans = 0;
  for (auto [state, len] : rle)
    if (!state) ans++;
  cout << ans << endl;
  return 0;
}