#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

constexpr long long INF = 1002003004005006007;
ll dp[510][510];

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  rep(i, 510) rep(j, 510) dp[i][j] = -INF;
  dp[0][0] = 0;
  int n, d, k;
  cin >> n >> d >> k;
  VI a(n), c(n);
  rep(i, n) cin >> a[i];
  rep(i, n) cin >> c[i];
  rep(i, n) {
    int ci = min(c[i], k);
    int add = a[i];
    rrep(i, 509) rrep(j, 510) if (dp[i][j] != -INF) {
      chmax(dp[i+1][min(j+ci, k)], dp[i][j] + add);
    }
  }
  ll ans = dp[d][k];
  if (ans == -INF) {
    cout << "No\n";
  } else {
    cout << ans << '\n';
  }
}