#include<bits/stdc++.h>
using namespace std;

int main(){
  int N, D, K; cin >> N >> D >> K;
  vector<int> A(N), C(N);
  vector DP(N + 1, vector(D + 1, vector<long long>(K + 1, -1e18)));
  for (int &B : A) cin >> B;
  for (int &B : C) cin >> B;

  DP.at(0).at(0).at(0) = 0;
  for (int i = 0; i < N; i++) {
    DP.at(i + 1) = DP.at(i);
    for (int d = 0; d < D; d++) {
      for (int k = 0; k <= K; k++) {
        if (DP.at(i).at(d).at(k) == -1e18) continue;
        int B = min(k + C.at(i), K);
        DP.at(i + 1).at(d + 1).at(B) = max(DP.at(i + 1).at(d + 1).at(B), DP.at(i).at(d).at(k) + A.at(i));
      }
    }
  }

  cout << (DP.at(N).at(D).at(K) != -1e18 ? to_string(DP.at(N).at(D).at(K)) : "No") << endl;
}