#include <bits/stdc++.h>
using namespace std;
#define int long long
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<pii> vii;
typedef vector<bool> vb;
#define fi first
#define se second
#define pb push_back
#define mid (l+r)/2
#define all(x) x.begin(),x.end()
#define FOR(i,a) for(int i=0;i<(a);i++)
#define FORE(i,a,b) for(int i=(a);i<(b);i++)
#define cont(x) for(auto el:x) cout<<el<<' ';cout<<endl;
#define contp(x) for(auto el:x) cout<<el.fi<<'-'<<el.se<<' ';cout<<endl;
#define sp <<" "<<
#define DEBUG(x) cout<<(#x) sp x<<endl
const int INF=1e18;
const int MAXN=5e5+5;
bool mm(pii a,pii b){
if(a.se==b.se) return a.fi<b.fi;
return a.se<b.se;
}
pii dp[MAXN];
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int n;
cin>>n;
vii a(n+1);
FORE(i,1,n+1) cin>>a[i].fi;
FORE(i,1,n+1) cin>>a[i].se;
int res=1;
for(int i=1;i<(1<<n);i++){
vii vec;
for(int bt=0;bt<n;bt++){
if(i&(1<<bt)) vec.pb(a[bt+1]);
}
sort(all(vec),mm);
int cur=0;
bool f=true;
FOR(j,vec.size()){
if(cur>vec[j].se){
f=false;
break;
}
cur+=vec[j].fi;
}
//contp(vec);
if(f){
res=max(res,(int) vec.size());
}
}
cout<<res<<endl;
}
