package main

import . "fmt"
import . "os"
import bf "bufio"

func main() {
	rd:=bf.NewReader(Stdin)
	var n int
	Fscan(rd,&n)
	a := make([]int64, 2*n)
	b := make([]int64, 2*n)
	x := make([]int64, n)
	y := make([]int64, n)
	for i := range a {
		Fscan(rd,&a[i])
	}
	for i := range b {
		Fscan(rd,&b[i])
	}
	for i := range x {
		Fscan(rd,&x[i])
	}
	for i := range y {
		Fscan(rd,&y[i])
	}
	var ans int64
	for i := range x {
		p1, p2 := 2*i, 2*i+1
		v := a[p1]+a[p2]+x[i]
		if w := b[p1]+b[p2]+x[i]; w > v {
			v = w
		}
		if w := a[p1]+b[p2]+y[i]; w > v {
			v = w
		}
		if w := b[p1]+a[p2]+y[i]; w > v {
			v = w
		}
		ans += v
	}
	Println(ans)
}