#include <bits/stdc++.h>
using namespace std;
#define rep(i, s, t) for (auto i{s}; i < t; ++i)
typedef long long ll;

template<typename T> bool chmax(T &a, T const &x) { return x > a ? a = x, true : false; }

int main() {
  int N, D, K;
  cin >> N >> D >> K;
  vector<int> A(N), C(N);
  rep(i, 0, N)
    cin >> A[i];
  rep(i, 0, N)
    cin >> C[i];

  constexpr ll inf{(1LL << 62) - 1};
  auto dp = vector(D+1, vector(K+1, -inf));
  auto _dp = dp;
  dp[0][0] = 0;
  rep(i, 0, N) {
    _dp = dp;
    rep(d, 0, D)
    rep(k, 0, K+1)
    if (dp[d][k] > -inf)
      chmax(_dp[d+1][min(k+C[i],K)], dp[d][k] + A[i]);
    swap(dp, _dp);
  }

  if (dp[D][K] > -inf)
    cout << dp[D][K] << endl;
  else
    puts("No");
}