#include <bits/stdc++.h>
using namespace std;
int n;
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
cin >> n;
vector<int> ord(n),dwarves(n),elves(n);
for(int i=0;i<n;i++){
cin >> ord[i];
}
for(int i=0;i<n;i++){
cin >> dwarves[i];
}
for(int i=0;i<n;i++){
cin >> elves[i];
}
sort(dwarves.begin(),dwarves.end());
sort(elves.begin(),elves.end());
int iz=0;
int con=0;
for(int i=0;i<n;i++){
if(elves[i]>dwarves[iz]){
iz++;
con++;
}
}
cout << con;
}
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