#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int hops[n + 1];
  bool vis[n + 1];
  int change[n + 1];
  for (int i = 1; i <= n; ++i) {
    cin >> hops[i];
    vis[i] = 0;
  }
  int cnt = 0;
  int cnt1 = 0;
  for (int i = 1; i <= n; ++i) {
    cin >> change[i];
    if (change[i]) cnt1++;
  }
  for (int i = 1; i <= n; ++i) {
    if (!vis[i]) {
      int j = i;
      cnt++;
      while (vis[hops[j]] == false) {
        j = hops[j];
        vis[j] = true;
      }
    }
  }
  if (cnt1 % 2)
    cnt1 = 0;
  else
    cnt1 = 1;
  if (cnt == 1) cnt = 0;
  cout << cnt + cnt1 << endl;
}
