#ifdef NACHIA
#define _GLIBCXX_DEBUG
#else
#define NDEBUG
#endif
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using i64 = long long;
using u64 = unsigned long long;
#define rep(i,n) for(int i=0; i<int(n); i++)
const i64 INF = 1001001001001001001;
template<typename A> void chmin(A& l, const A& r){ if(r < l) l = r; }
template<typename A> void chmax(A& l, const A& r){ if(l < r) l = r; }
using namespace std;


void testcase(){
    int N; cin >> N;
    vector<pair<i64,i64>> A(N);
    rep(i,N) cin >> A[i].first;
    rep(i,N) cin >> A[i].second;
    sort(A.rbegin(), A.rend());
    vector<i64> dp(1000100);
    rep(i,dp.size()) dp[i] = i;
    for(auto [a,b] : A) chmax(dp[a], dp[a+b]);
    cout << dp[1] << "\n";
}

int main(){
    ios::sync_with_stdio(false); cin.tie(nullptr);
    testcase();
    return 0;
}