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

vector<vector<vector<int>>> make_3Dvec(int i, int j, int k, int init){
  vector<vector<vector<int>>> vec(i, vector<vector<int>>(j, vector<int>(k, init)));
  return vec;
}

constexpr int INF = -1e9;

int main () {
  int n,d,k;
  cin >> n >> d >> k;
  
  vector<int> a(n);
  vector<int> c(n);
  for(auto &el : a){
    cin >> el;
  }
  for(auto &el : c){
    cin >> el;
  }
  
  auto dp = make_3Dvec(n + 1, d + 1, k + 1, INF);
  
  dp[0][0][0] = 0;
  
  for(int i = 0; i < n; i++){
    for(int j = 0; j <= d; j++){
      for(int l = 0; l <= k; l++){
        int now = dp[i][j][l];
        if(now == INF) continue;
        dp[i + 1][j][l] = max(dp[i + 1][j][l], now);
        
        if(j < d){
          dp[i + 1][j + 1][min(k, l + c[i])] = max(
            dp[i + 1][j + 1][min(k, l + c[i])],
            now + a[i]
          );
        }
      }
    }
  }
  
  int ans = dp[n][d][k];
  if(ans == INF) cout << "No" << endl;
  else cout << ans << endl;
}