#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    ll 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];
    map<ll, ll> mp;
    ll now = 0;
    mp[a[0]-now] += c[0];
    for(int i=1;i<n;i++){
        now += b[(i-1)%m];
        mp[a[i]-now] += c[i];
    }
    ll sum = accumulate(c.begin(),c.end(),0ll);
    dbg(mp);
    dbg(sum);
    ll d = 0;
    for(auto p : mp){
        d = max(p.second, d);
    }
    cout << sum-d << endl;
    return 0;
}