#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); ++i)

int main() {
  int n, m;
  cin >> n >> m;
  vector<ll> a(n), b(m), c(n);
  rep(i, n) cin >> a[i];
  rep(i, m) cin >> b[i];
  rep(i, n) cin >> c[i];
  vector<ll> ideal_a(n, 0);
  rep(i, n - 1) ideal_a[i + 1] = ideal_a[i] + b[i % m];
  map<ll, ll> cnt;
  rep(i, n) {
    ll x = a[i] - ideal_a[i];
    cnt[x] += c[i];
  }
  ll ans = accumulate(c.begin(), c.end(), 0LL);
  ans -= max_element(cnt.begin(), cnt.end(), [](auto a, auto b) { return a.second < b.second; })->second;
  cout << ans << endl;
  return 0;
}