#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<long long,long long> pll;
#define ep emplace_back
#define pb push_back
#define mp make_pair
#define rep(i,n) for(int i=0;i<(n);++i)
constexpr int mod=1000000007;
constexpr int mod1=998244353;
vector<int> dx={0,1,0,-1},dy={-1,0,1,0};
bool inside(int y,int x,int h,int w){
	if(y<h && y>=0 && x<w && x>=0) return true;
	return false;
}





int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);
	int n;cin >> n;
	vector<int> a(n + 1), b(n + 1), d(n);
	rep(i,n + 1) cin >> a.at(i);
	rep(i,n + 1) cin >> b.at(i);
	rep(i,n) cin >> d.at(i);
	sort(d.begin(),d.end());
	int ok = 0, ng = n + 1;
	while(ng - ok > 1){
		int mid = (ok + ng) / 2;
		vector<vector<bool>> dp(n + 1,vector<bool>(n + 1));
		dp[0][0] = true;
		rep(i,n){
			rep(j,n){
				if(i + j >= mid) continue;
				if(!dp[i][j]) continue;
				if(a.at(i) + b.at(j + 1) >= d.at(mid - i - (j + 1))) dp[i][j + 1] = true;
				if(a.at(i + 1) + b.at(j) >= d.at(mid - (i + 1) - j)) dp[i + 1][j] = true;
			}
		}
		bool flg = false;
		rep(i,mid + 1) if(dp[i][mid - i]) flg = true;
		if(flg) ok = mid;
		else ng = mid;
	}
	cout << ok << endl;
}