#include <cstdio>
#include <algorithm>
#include <stack>
#include <queue>
#include <deque>
#include <vector>
#include <string>
#include <string.h>
#include <cstdlib>
#include <ctime>
#include <cmath>
#include <map>
#include <set>
#include <iostream>
#include <sstream>
#include <cctype>
#define fi first
#define se second
#define rep(i,n) for(int i = 0; i < n; ++i)
#define rrep(i,n) for(int i = 1; i <= n; ++i)
#define drep(i,n) for(int i = n-1; i >= 0; --i)
#define gep(i,g,j) for(int i = g.head[j]; i != -1; i = g.e[i].next)
#define each(it,c) for(__typeof((c).begin()) it=(c).begin();it!=(c).end();it++)
#define rng(a) a.begin(),a.end()
#define maxs(x,y) x = max(x,y)
#define mins(x,y) x = min(x,y)
#define pb push_back
#define sz(x) (int)(x).size()
#define pcnt __builtin_popcount
#define snuke srand((unsigned)clock()+(unsigned)time(NULL));
inline int in() { int x; scanf("%d",&x); return x;}
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
typedef pair<P,int> Q;
typedef vector<int> vi;

const int MX = 100005, INF = 1000010000;
const ll LINF = 1000000000000000000ll;
const double eps = 1e-10;
const int di[] = {-1,0,1,0}, dj[] = {0,-1,0,1}; //^<v>

int a[MX], b[MX], n;

void rot() {
  rep(i,n-1) swap(b[i],b[i+1]);
}
int solve() {
  vi d(n), c(n);
  rep(i,n) d[i] = a[i];
  set<Q> s;
  rep(i,n) s.insert({{d[i],c[i]},i});
  rep(i,n) {
    auto p = *s.begin();
    s.erase(p);
    int k = p.se;
    c[k]++;
    d[k] += b[i]/2;
    s.insert(Q(P(d[k],c[k]),k));
  }
  return *max_element(rng(c));
}

int main(){
  cin >> n;
  rep(i,n) cin >> a[i];
  rep(i,n) cin >> b[i];
  int ans = INF;
  rep(i,n){
    rot();
    mins(ans,solve());
  }
  cout << ans << endl;
  return 0;
}