#include <bits/stdc++.h>
using namespace std;

int n, a[200010], b[200010], f[200010], vis[200010], ret;
map<int, vector<int> >mp;

void calc(int height)
{
    ret = max(ret, height);
    for (int v : mp[height]) calc(height+v);
}

int main()
{
    cin >> n;
    for (int i=1; i<=n; i++) cin >> a[i];
    for (int i=1; i<=n; i++) cin >> b[i];
    for (int i=1; i<=n; i++) mp[a[i]].push_back(b[i]);
    calc(1);
    cout << ret;
}