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):
  ans += max(max(a[2 * i] + a[2 * i + 1], b[2 * i] + b[2 * i + 1]) + x[i], max(a[2 * i] + b[2 * i + 1], b[2 * i] + a[2 * i + 1]) + y[i])

print(ans)