#include <bits/stdc++.h>
using namespace std;
#define REP(i,n) for(int i=0;i<(int)(n);++i)
#define REPR(i,n) for (int i=(int)(n)-1;i>=0;--i)
#define FOR(i,c) for(__typeof((c).begin())i=(c).begin();i!=(c).end();++i)
#define ALL(c) (c).begin(), (c).end()
#define valid(y,x,h,w) (0<=y&&y<h&&0<=x&&x<w)
#define tpl(...) make_tuple(__VA_ARGS__)
const int INF = 0x3f3f3f3f;
const double EPS = 1e-8;
const double PI = acos(-1);
const int dy[] = {-1,0,1,0};
const int dx[] = {0,1,0,-1};
typedef long long ll;
typedef pair<int,int> pii;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
template<typename Ch,typename Tr,typename C,typename=decltype(begin(C()))>basic_ostream<Ch,Tr>& operator<<(basic_ostream<Ch,Tr>&os,
const C& c){os<<'[';for(auto i=begin(c);i!=end(c);++i)os<<(i==begin(c)?"":" ")<<*i;return os<<']';}
template<class S,class T>ostream&operator<<(ostream &o,const pair<S,T>&t){return o<<'('<<t.first<<','<<t.second<<')';}
template<int N,class Tp>void output(ostream&,const Tp&){}
template<int N,class Tp,class,class ...Ts>void output(ostream &o,const Tp&t){if(N)o<<',';o<<get<N>(t);output<N+1,Tp,Ts...>(o,t);}
template<class ...Ts>ostream&operator<<(ostream&o,const tuple<Ts...>&t){o<<'(';output<0,tuple<Ts...>,Ts...>(o,t);return o<<')';}
template<class T>void output(T t,char z=10){if(t<0)t=-t,putchar(45);int c[20];
int k=0;while(t)c[k++]=t%10,t/=10;for(k||(c[k++]=0);k;)putchar(c[--k]^48);putchar(z);}
template<class T>void outputs(T t){output(t);}
template<class S,class ...T>void outputs(S a,T...t){output(a,32);outputs(t...);}
template<class T>void output(T *a,int n){REP(i,n)cout<<a[i]<<(i!=n-1?',':'\n');}
template<class T>void output(T *a,int n,int m){REP(i,n)output(a[i],m);}
template<class T>bool input(T &t){int n=1,c;for(t=0;!isdigit(c=getchar())&&~c&&c-45;);
if(!~c)return 0;for(c-45&&(n=0,t=c^48);isdigit(c=getchar());)t=10*t+c-48;t=n?-t:t;return 1;}
template<class S,class ...T>bool input(S&a,T&...t){input(a);return input(t...);}
template<class T>bool inputs(T *a, int n) { REP(i,n) if(!input(a[i])) return 0; return 1;}


typedef int Weight;
struct Edge {
  int src, dst;
  Weight weight;
  Edge(int src, int dst, Weight weight) :
    src(src), dst(dst), weight(weight) { }
};
typedef vector<Edge> Edges;
typedef vector<Edges> Graph;

typedef vector<Weight> Array;
typedef vector<Array> Matrix;

void add_edge(Graph &g, int s, int d, Weight w){
  g[s].push_back(Edge(s,d,w));
  g[d].push_back(Edge(d,s,0));
}

#define RESIDUE(s,t) (capacity[s][t]-flow[s][t])

Weight Dinic(const Graph &g, int s, int t) {
  int n = g.size();
  Matrix flow(n, Array(n)), cap(n, Array(n)); // adj. matrix
  REP(u,n) FOR(e,g[u]) cap[e->src][e->dst] += e->weight;
  auto residue = [&](int s, int t) {return cap[s][t] - flow[s][t];};

  Weight total = 0;
  for (bool cont = 1; cont; ) {
    cont = 0;
    vector<int> level(n, -1); level[s] = 0; // make layered network
    queue<int> Q({s});
    for (int d = n; !Q.empty() && level[Q.front()] < d; ) {
      int u = Q.front(); Q.pop();
      if (u == t) d = level[u];
      FOR(e, g[u]) if (residue(u,e->dst) > 0 && level[e->dst] == -1)
        Q.push(e->dst), level[e->dst] = level[u] + 1;
    }
    vector<bool> used(n); // make blocking flows
    function<Weight(int,int)> augment = [&](int u, int cur) {
      if (u==t||cur==0) return cur;
      if (used[u]) return 0;
      used[u] = 1;
      FOR(e,g[u]) if (level[e->dst] > level[u]) {
        Weight f = augment(e->dst, min(cur, residue(u,e->dst)));
        if (f > 0) {
          flow[u][e->dst] += f; flow[e->dst][u] -= f;
          used[u] = 0;
          return f;
        }
      }
      return 0;
    };
    for (Weight f = 1; f > 0; ) {
      f = augment(s, INF);
      if (f == 0) break;
      total += f; cont = 1;
    }
  }
  return total;
}

int B[50];
int D[50];
int l1[50], r1[50];
int l2[50], r2[50];

int main() {
  int n;
  while(input(n)) {
    int A; cin >> A;
    inputs(B,A);
    int C; cin >> C;
    inputs(D,C);
    REP(i,n) {
      l1[i] = (i / A) * A;
      r1[i] = (i / A + 1) * A;
      l2[i] = (i / C) * C;
      r2[i] = (i / C + 1) * C;
    }
    int N = r1[n-1];
    int M = r2[n-1];

    set<pii> S;
    REP(i,N) {
      for (int j=l2[i]; j<r2[i]; ++j)
        S.insert(pii(i,j));
    }
    REP(j,M) {
      for (int i=l1[j]; i<r1[j]; ++i)
        S.insert(pii(i,j));
    }
    Graph g(4+N+M);
    REP(i,l1[n-1]) add_edge(g,N+M,i,1);
    REP(i,l2[n-1]) add_edge(g,N+i,N+M+1,1);
    add_edge(g,N+M,N+M+2,n-l1[n-1]);
    for (int i=l1[n-1]; i<N; ++i) {
      add_edge(g,N+M+2,i,1);
    }
    add_edge(g,N+M+3,N+M+1,n-l2[n-1]);
    for (int i=l2[n-1]; i<M; ++i) {
      add_edge(g,N+i,N+M+3,1);
    }

    add_edge(g,N+M+1,N+M+3,n);
    for (auto p : S) {
      int x = p.first;
      int y = p.second;
      if (B[x%A] > D[y%C]) {
        add_edge(g,x,N+y,1);
      }
    }
    cout << Dinic(g,N+M,N+M+1) << endl;
  }
}