#include <bits/stdc++.h>
#include<iostream>
#include<iomanip>
#include<string>
#include<algorithm>
#include<vector>
#include<set>
#include<list>
#include<queue>
#include<math.h>
#include<bitset>
using ll = long long;
using namespace std;

int main(){
    int nw, nb, pw = 0, pb = 0, answ = 0, ansb = 0;
    cin >> nw;
    vector<int> w(nw);
    for (int i = 0; i < nw; i++) cin >> w[i];
    cin >> nb;
    vector<int> b(nb);
    for (int i = 0; i < nb; i++) cin >> b[i];
    sort(w.begin(), w.end(), greater());
    sort(b.begin(), b.end(), greater());
    
    // black first -> white を探索
    if (nb) ansb++;
    for (int i = pw; i < nw; i++){
        if (w[i] < b[pb]){
            ansb++;
            pw = i+1;
            pb++;
            if (pb == nb) break;
            for (int j = pb; j < nb; j ++){
                if (w[i] > b[j]){
                    answ++;
                    pb = j;
                    break;
                }
            }
            if (pb == nb) break;
        }
        if (pb == nb) break;
    }
    pb = 0;
    pw = 0;
    if (nw) answ++;
    for (int i = pb; i < nb; i++){
        if (b[i] < w[pw]){
            answ++;
            pb = i;
            pw++;
            if (pw == nw) break;
            for (int j = pw; j < nw; j ++){
                if (b[i] > w[j]){
                    ansb++;
                    pw = j;
                    break;
                }
            }
            if (pw == nw) break;
        }
        if (pw == nw) break;
    }
    cout << max(answ, ansb) << endl;
}