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

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>

int main() {
  int n;
  cin >> n;
  vector<int> s(n), t(n);
  vector<int> cnts(3), cntt(3);
  rep(i,n) {
    cin >> s[i];
    cnts[s[i]]++;
  }
  rep(i,n) {
    cin >> t[i];
    cntt[t[i]]++;
  }

  int ans = 0;
  if (cnts[2] && cntt[2]) ans =  (cnts[2]+cntt[2])*n-cnts[2]*cntt[2];
  else if (cnts[2]) ans = cnts[2]*n+cnts[1];
  else if (cntt[2]) ans = cntt[2]*n+cntt[1];
  else ans = max(cnts[1], cntt[1]);
  cout << ans << endl;

}