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

void solve(int a, int val, int &kt, int &sum, int&ans) {
	if(a+kt <= sum) {
		kt+= a;
		ans += val*a;
	}
	else {
		ans += val*(sum-kt);
		kt = sum;
	}
}

signed main() {
	int n; cin >> n;
	int sum = 0;
	vector<vector<int>> x(n, vector<int>(2));
	for(int i = 0; i < n; i++) cin >> x[i][0];
	for(int i = 0; i < n; i++) {
		cin >> x[i][1];
		sum += x[i][1];
	}
	sort(begin(x), end(x));
	int ans = 0;
	int kt = 0;
	for(int i = 0; i < n; i++) {
		if(x[i][0] > kt) solve(x[i][0] - kt, 2, kt,sum,ans);
		if(kt == sum) break;
		solve(x[i][1], 1, kt,sum,ans);
		if(kt == sum) break;
	}
	cout << ans;
}