#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define vl vector<ll>

#ifndef ONLINE_JUDGE
#  define dbg(x) (cerr << #x << " = " << (x) << endl)
#else
#  define dbg(x) 0
#endif

vl mp[1234567];
ll vis[1234567];
vl v;

inline ll dfs(ll x)
{
    vis[x]=1;
    for(auto it:mp[x])
    {
        if(!vis[it])
            return 1+dfs(it);
    }
    return 1;
}



int main()
{

    ll n;
    cin>>n;
    ll i;
    for(i=1; i<=n; i++)
    {
        ll val;
        scanf("%lld",&val);
        mp[i].emplace_back(val);
    }


    for(i=1; i<n; i++)
    {
        if(!vis[i]){
            ll val=dfs(i);
            v.emplace_back(val);
        }
    }

    dbg(v.size());
    ll ans=0;
    if(v.size()!=1)
        ans+=v.size();

    ll cnt=0;
    for(i=1;i<=n;i++){
        ll val;cin>>val;
        cnt^=val;
    }
    if(cnt==0)
        ans++;
    cout<<ans;

}