from collections import defaultdict

# 入力
N, M = map(int, input().split())
A_list = list(map(int, input().split()))
B_list = list(map(int, input().split()))
C_list = list(map(int, input().split()))

# 入力値チェック
assert 1 <= M <= N <= 2 * 10**5
assert all([-10**9 <= a <= 10**9 for a in A_list])
assert all([-10**9 <= b <= 10**9 for b in B_list])
assert all([1 <= c <= 10**9 for c in C_list])

# 解く
sum_cost = sum(C_list)

cnt = 0
exempted_costs = defaultdict(int)

for i, (a, c) in enumerate(zip(A_list, C_list)):
    cnt += B_list[(i - 1) % M]
    exempted_costs[cnt - a] += c

# 徴収が免除される最大のコスト
max_exempted_cost = 0

for exempted in exempted_costs.values():
    max_exempted_cost = max(exempted, max_exempted_cost)

# 総コスト - 免除コスト
print(sum_cost - max_exempted_cost)