#include<bits/stdc++.h>
using namespace std;

#define int long long

typedef pair<int,int>pint;
typedef vector<int>vint;
typedef vector<pint>vpint;
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define all(v) (v).begin(),(v).end()
#define rep(i,n) for(int i=0;i<(n);i++)
#define reps(i,f,n) for(int i=(f);i<(n);i++)
#define each(it,v) for(__typeof((v).begin()) it=(v).begin();it!=(v).end();it++)
template<class T,class U>void chmin(T &t,U f){if(t>f)t=f;}
template<class T,class U>void chmax(T &t,U f){if(t<f)t=f;}

int f(vint A,vint B){
    int prev=114514,ret=0;
    while(true){
        while(A.size()&&A.back()>=prev)A.pop_back();
        if(A.size()==0)break;
        prev=A.back();
        A.pop_back();
        ret++;
        swap(A,B);
    }
    return ret;
}

signed main(){
    vint A,B;
    int N;cin>>N;A.resize(N);rep(i,N)cin>>A[i];
    cin>>N;B.resize(N);rep(i,N)cin>>B[i];
    sort(all(A));sort(all(B));

    cout<<max(f(A,B),f(B,A))<<endl;
    return 0;
}