#include <bits/stdc++.h>
using namespace std;
const int MAXN = 5e5;
int n;
int posses[MAXN];
vector<int> strs[MAXN];
int dstrs[MAXN];
int pre[MAXN];
set<int> opn;
int main() {
ios_base::sync_with_stdio(false); cin.tie(NULL);
cin >> n;
for (int i = 0; i < n; i++) {
cin >> posses[i]; posses[i]--;
}
for (int i = 0; i < n; i++) cin >> dstrs[i];
for (int i = 0; i < n; i++) {
int s; cin >> s;
strs[posses[i]].push_back(s);
}
int c = 0;
int mnpos = 0;
for (int i = 0; i < n; i++) {
pre[i] = c;
c += strs[i].size()-1;
if (pre[i] < pre[mnpos]) mnpos = i;
}
int ans = 0;
for (int v = mnpos; v < mnpos+n; v++) {
int j = v%n;
for (int s: strs[j]) opn.insert(s);
assert(!opn.empty());
auto it = opn.upper_bound(dstrs[j]);
if (it != opn.end()) {
ans++;
opn.erase(it);
}
else opn.erase(opn.begin());
}
cout << ans << "\n";
}
