#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using ll = long long;
using mint = atcoder::modint998244353;
using maxt = atcoder::modint1000000007;

int main() {
	int N;
	cin >> N;
	vector<int> A(N);
	for(int &o : A) {
		cin >> o;
	}
	vector<int> B(N);
	for(int &o : B) {
		cin >> o;
	}
	int64_t tmp = 1;
	for(int64_t i = 1; i <= N; i++) {
	  tmp *= i;
	}
	int ans = 0;
	while(tmp > 0) {
	  int H = 1;
	  for(int i = 0; i < N; i++) {
	    if(H == A.at(i)) {
	      H += B.at(i);
	    }
	  }
	  ans = max(ans, H);
	  tmp--;
	  next_permutation(A.begin(), A.end());
	  next_permutation(B.begin(), B.end());
	}
	cout << ans << endl;
}