from collections import defaultdict

n, m = map(int, input().split())
a = list(map(int, input().split()))
b = list(map(int, input().split()))
c = list(map(int, input().split()))

d = defaultdict(int)
diff = 0
for i in range(n):
    if i == 0:
        d[a[i]] += c[i]
        continue
    diff += b[(i - 1) % m]
    d[a[i] - diff] += c[i]

print(sum(c) - max(d.values()))