using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;
class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var a = NList;
        var b = NList;
        var x = NList;
        var y = NList;
        var ans = 0L;
        for (var i = 0; i < n; ++i)
        {
            var sub = 0L;
            sub = Math.Max(sub, a[i * 2] + a[i * 2 + 1] + x[i]);
            sub = Math.Max(sub, a[i * 2] + b[i * 2 + 1] + y[i]);
            sub = Math.Max(sub, b[i * 2] + a[i * 2 + 1] + y[i]);
            sub = Math.Max(sub, b[i * 2] + b[i * 2 + 1] + x[i]);
            ans += sub;
        }
        WriteLine(ans);
    }
}