#include <bits/stdc++.h>
#define N 500005
using namespace std;
int pos[N],d[N];
vector<int> ep[N];
multiset<int> p;
void solve(){
int n;
cin >> n;
for(int i=0;i<n;i++){
cin >> pos[i];
pos[i]--;
}
for(int i=0;i<n;i++){
cin >> d[i];
}
for(int i=0;i<n;i++){
int a;
cin >> a;
ep[pos[i]].push_back(a);
}
int st = N,mini = N;
int cnt = 0;
for(int i=0;i<n;i++){
cnt += ep[i].size();
if(cnt - i < mini){
st = i;
mini = cnt-i;
}
}
int ans = 0;
for(int i=0;i<n;i++){
st = (st+1)%n;
for(auto u:ep[st]){
p.insert(u);
}
auto it = p.upper_bound(d[st]);
if(it == p.end()){
p.erase(p.begin());
}
else{
p.erase(it);
ans++;
}
}
cout << ans;
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
#ifdef Local
freopen("in.txt","r",stdin);
freopen("out.txt","w",stdout);
#endif
int t=1;
//cin>>t;
while(t--){
solve();
}
#ifdef Local
cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
#endif
}
