#include <iostream>
#include <vector>

#include "reactions.h"

using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;
    cin >> n;
    vector<int> r(n);
    vector<long long> c(n);
    for (int i = 0; i < n; i++) {
        cin >> r[i];
    }
    for (int i = 0; i < n; i++) {
        cin >> c[i];
    }

    cout << reactions(n, r, c) << "\n";
    return 0;
}