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

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int N,D,K; cin >> N >> D >> K;
    vector<int> A(N),C(N);
    for(auto &a : A) cin >> a;
    for(auto &c : C) cin >> c;

    vector<vector<long long>> dp(D+1,vector<long long>(K+1,-1e18));
    dp.at(0).at(0) = 0;
    for(int i=0; i<N; i++){
        int a = A.at(i),c = C.at(i);
        for(int k=D-1; k>=0; k--) for(int l=0; l<=K; l++){
            dp.at(k+1).at(min(K,l+c)) = max(dp.at(k+1).at(min(K,l+c)),dp.at(k).at(l)+a);
        }
    }   
    if(dp.at(D).at(K) <= -1e17) cout << "No" << endl;
    else cout << dp.at(D).at(K) << endl; 
}