n = int(input())
a = list(map(int,input().split()))
b = list(map(int,input().split()))
x = list(map(int,input().split()))
y = list(map(int,input().split()))
ans = 0
for i in range(n):
    p = max(a[2*i]+a[2*i+1],b[2*i]+b[2*i+1])+x[i]
    q = max(a[2*i]+b[2*i+1],b[2*i]+a[2*i+1])+y[i]
    ans += max(p,q)
print(ans)