# import系 ---
from collections import defaultdict

# 入力用 ---
INT = lambda: int(input())
MI = lambda: map(int, input().split())
MI_DEC = lambda: map(lambda x: int(x) - 1, input().split())
LI = lambda: list(map(int, input().split()))
LI_DEC = lambda: list(map(lambda x: int(x) - 1, input().split()))
LS = lambda: list(input())
LSS = lambda: input().split()

INF = 1 << 60
MOD = 998244353

# コード ---
N, M = MI()
A_list = LI()
B_list = LI()
C_list = LI()

sum_cost = sum(C_list)

cnt = 0
diff_dict = defaultdict(int)

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

max_exempted_cost = 0

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

print(sum_cost - max_exempted_cost)