// banayas rpg.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
#include <deque>
#include <algorithm>

using namespace std;
struct adat
{
    int exp, db;
};
bool hasonlit(adat a, adat b)
{
    if (a.exp < b.exp) return 1;
    else return 0;
}
deque<adat>x;
int n, i, j, ido,maxi,dbexp=0,h,mini=9999999,k;
int main()
{
    cin >> n;
    x.resize(n + 1);
    for (i = 1; i <= n; ++i)
    {
        cin >> x[i].exp;
        if (x[i].exp < mini)
        {
            mini = x[i].exp;
            k = i;
        }
    }
    for (i = 1; i <= n; ++i)
    {
        cin >> x[i].db;
        if (x[i].db > maxi)
        {
            maxi = x[i].db;
            h = i;
        }
    }
    
    while (dbexp < mini)
    {
        ido += 2;
        dbexp++;
        x[h].db--;
    }
    sort(x.begin(), x.end(), hasonlit);
    for (i = 1; i <= n; ++i)
    {
        if (dbexp >= x[i].exp)
        {
            ido += x[i].db;
            dbexp += x[i].db;
        }
    }
    cout << ido;
    return 0;
}
/*
3
4 3 5
5 1 1
*/
// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

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