#include<bits/stdc++.h>
using namespace std;
int main()
{
    //freopen("in.txt","r",stdin);
    int n;
    cin >> n;
    vector<int>s(n);
    vector<int>t(n);
    int sum1 = 0;
    int sum2 = 0;
    int hasT = 0;
    int hasS = 0;
    int cntT = 0, cntS = 0;
    for(int i=0; i<n; i++)
    {
        cin >> s[i];
        if(s[i]==2)hasS++;
        if(s[i]==1)cntS++;
    }
    for(int i=0; i<n; i++)
    {
         cin >> t[i];
        if(t[i]==2)hasT++;
        if(t[i]==1)cntT++;
    }
    int ans = (hasT*n+hasS*n - (hasT*hasS));
    if(hasT && hasS)
    {
        cout << ans << endl;
        return 0;
    }
    if(!hasT && !hasS)
    {
        cout << max(cntT,cntS) << endl;
         return 0;
    }
    if(!hasT && hasS)
    {
        cout << ans + cntS << endl;
         return 0;
    }
    if(!hasS && hasT)
    {
        cout << ans + cntT << endl;
         return 0;
    }
}