#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
//using mint = modint1000000007;
using ll = long long;
ll INF = 2e18;
template<typename T> using vc = vector<T>;
template<typename T> using vv = vc<vc<T>>;
using vi = vc<int>; using vvi = vv<int>;
using vl = vc<ll>; using vvl = vv<ll>;
using vs = vc<string>; using vvs = vv<string>;
using vb = vc<bool>; using vvb = vv<bool>;
using vmint = vc<mint>; using vvmint = vv<mint>;
#define rep(i,n) for(ll i=0; i<(n); i++)
#define drep(i,n) for(ll i=(n)-1; i>=0; i--)
#define rrep(i,n) for(ll i=1; i<=(n); i++)
#define nfor(i,a,b) for(ll i=a;i<b;i++)
#define dfor(i,a,b) for(ll i=(a)-1; i>=(b); i--)
template<class T>istream& operator>>(istream& i, vc<T>& v) {rep(j,(ll) size(v))i >> v[j]; return i; }
#define nall(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define chmax(x,y) x = max(x,y)
#define chmin(x,y) x = min(x,y)
#define YES cout<<"Yes"<<endl
#define NO cout<<"No"<<endl
#define YN {YES;}else{NO;}
#define ERROR cout<<-1<<endl
void print(long double x){ printf("%.20Lf\n",x);}
#define vc_cout(v){ll n = size(v);rep(i,n)cout<<v[i]<<endl;}
#define vv_cout(v){ll n = size(v);rep(i,n){rep(j,size(v[i])){cout<<' '<<v[i][j];}cout<<endl;}}

int main(){
    ll N, D, K;
    cin >> N >> D >> K;
    vl A(N), C(N);
    rep(i,N) cin >> A[i];
    rep(i,N) cin >> C[i];
    vvl dp(D+1,vl(K+1,-INF));
    dp[0][0] = 0;
    rep(i,N) {
        vvl nextdp(D+1,vl(K+1,-INF));
        rep(j,D+1) {
            rep(k,K+1) {
                if (dp[j][k] == -INF) continue;
                else {
                    chmax(nextdp[j][k],dp[j][k]);
                    if (j == D) continue;
                    if (C[i]+k>=K) {
                        chmax(nextdp[j+1][K],dp[j][k]+A[i]);
                    } else {
                        chmax(nextdp[j+1][k+C[i]],dp[j][k]+A[i]);
                    }
                }
            }
        }
        dp = nextdp;
    }
    if (dp[D][K] == -INF) NO;
    else cout << dp[D][K] << endl;
}