N, M = map(int, input().split())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
C = list(map(int, input().split()))

ans1 = 0
p = A[0]
for i in range(N - 1):
  if A[i + 1] - p != B[i % M]:
    ans1 += C[i + 1]
    p = p + B[i % M]
  else:
    p = A[i + 1]

ans2 = 0
p = A[-1]
for i in range(N - 2, -1, -1):
  if p - A[i] != B[i % M]:
    ans2 += C[i]
    p = p - B[i % M]
  else:
    p = A[i]

print(min(ans1, ans2))