#include<iostream>
#include<vector>
#include<algorithm>
#include<cstring>
#include<cassert>
#include<cmath>
#include<ctime>
#include<iomanip>
#include<numeric>
#include<stack>
#include<queue>
#include<map>
#include<unordered_map>
#include<set>
#include<unordered_set>
#include<bitset>
#include<random>
#include<functional>
#include<utility>
using namespace std;

#include<algorithm>
#include<vector>
#include<cassert>
using namespace std;
struct UnionFind
{
	private:
	int n;
	vector<int> par,siz;

	public:
	UnionFind(int n) :n(n),par(n,-1),siz(n,1) {}

	int root(int u) 
	{
		assert(0 <= u && u < n);
		return (par[u] < 0 ? u:par[u] = root(par[u]));
	}

	bool same(int u,int v)
	{
		assert(0 <= u && u < n && 0 <= v && v < n);
		return root(u) == root(v);
	}

	bool unite(int u,int v)
	{
		assert(0 <= u && u < n && 0 <= v && v < n);
		u = root(u),v = root(v);
		if(u == v) return false;

		if(siz[u] < siz[v]) swap(u,v);

		siz[u] += siz[v];
		par[v] = u;

		return true;
	}

	int size(int u)
	{
		assert(0 <= u && u < n);
		return siz[root(u)];
	}

	vector<vector<int>> components()
	{
		vector<vector<int>> ret(n);
		for(int u = 0;u < n;u++) ret[root(u)].push_back(u);

		ret.erase(remove_if(ret.begin(),ret.end(),[](vector<int> v) { return v.empty();}),ret.end());

		return ret;
	}
};

void solve()
{
	int N,M;
	cin >> N >> M;
	vector<long long> A(N),B(M),C(N);
	for(int i = 0;i < N;i++) cin >> A[i];
	for(int i = 0;i < M;i++) cin >> B[i];
	for(int i = 0;i < N;i++) cin >> C[i];
	long long S = 0;
	for(int i = 0;i < N;i++)
	{
		A[i] -= S;
		S += B[i%M];
	}
	map<long long,long long> mp;
	long long ans = 0;
	for(int i = 0;i < N;i++)
	{
		mp[A[i]] += C[i];
		ans += C[i];
	}
	long long mx = 0;
	for(auto it = mp.begin();it != mp.end();it++) mx = max(mx,it->second);
	ans -= mx;
	cout << ans << endl;
}
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int tt = 1;
	/* cin >> tt; */
	while(tt--) solve();
}