#include <iostream>

using namespace std;
int main(){
  int n;cin>>n;
  int ans = 0;
  for(int i = 0; n > i; i++){
    int x;cin>>x;
    if(x == 2)ans += n;
    else if(x == 1)ans++;
  }
  int ans2 = 0;
  for(int i = 0; n > i; i++){
    int x;cin>>x;
    if(x == 2)ans2 += n;
    else if(x == 1)ans2++;
  }
  cout << max(ans, ans2) << endl;
}