#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);++i)
using namespace std;
using ll = long long;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int n,m;
    cin >> n >> m;
    vector<ll>a(n),b(n-1),c(n);
    rep(i,n) cin >> a[i];
    rep(i,m) cin >> b[i];
    rep(i,n) cin >> c[i];
    rep(i,n-1) b[i] = b[i%m];

    vector<ll> d(n,0);
    rep(i,n-1) d[i+1] += d[i]+b[i];
    
    vector<ll> e(n,0);
    rep(i,n){
        e[i] = d[i]-a[i];
    }
    map<ll,ll> mp;
    rep(i,n) mp[e[i]]+=c[i];
    ll sum = 0;
    rep(i,n) sum += c[i];
    ll ans = 1e18;
    for(auto [x,y]:mp){
        ans = min(ans,sum-y);
    }
    cout << ans << endl;


}