#include<bits/stdc++.h>
using namespace std;
#include<atcoder/all>
using namespace atcoder;
using ll = long long;
int n;
vector<int> a,b;
using P = pair<int,int>;

void solve(){
	int out = n;
	for(int i = 0;i<n;i++){
		multiset<P> mst;
		for(auto &j:a)mst.emplace(j,0);
		for(int j = 0;j<n;j++){
			auto it = mst.begin();
			auto p = *it;
			mst.erase(it);
			p.second++;
			p.first += b[(i+j)%n]/2;
			mst.insert(p);
		}
		int ans = 0;
		for(auto &j:mst)ans = max(ans,j.second);
		out = min(ans,out);
	}
	cout<<out<<endl;
}

signed main(){
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	cin >> n;
	a = vector<int>(n);
	b = vector<int>(n);
	for(auto &i:a)cin >> i;
	for(auto &i:b)cin >> i;
	solve();
}