#include <bits/stdc++.h>
using namespace std;
#ifdef local
#include <debug.hpp>
#else
#define debug(...)
#endif
#define rep(i, n) for (int i = 0; i < n; i++)
template <class T> istream& operator>>(istream& I, vector<T>& V) {for (T& X : V) I >> X; return I;}
template <class T> inline bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;}
template <class T> inline bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;}
vector<int> di = {-1, 1, 0, 0}, dj = {0, 0, -1, 1}; int inf = 2e9; long INF = 1e18;

int main() {
    int n, d, k;
    cin >> n >> d >> k;
    vector<int> a(n), c(n);
    cin >> a >> c;

    vector dp(d + 1, vector<long>(k + 1, -INF));
    dp[0][0] = 0;
    rep(i, n) {
        auto p = dp;
        swap(p, dp);
        rep(j, d) rep(I, k + 1) {
            int nk = min(k, I + c[i]);
            chmax(dp[j + 1][nk], p[j][I] + a[i]);
        }
    }

    long ans = dp[d][k];
    if (ans < -1e10) {
        cout << "No\n";
    } else {
        cout << ans << endl;
    }
    return 0;
}