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

#define rep(i, n) for( int i = 0; i < n; i++ )
using ll = long long;

int main() {
	int N, D, K;
	cin >> N >> D >> K;
	vector<ll> a(N), c(N);
	rep(i, N) cin >> a[i];
	rep(i, N) cin >> c[i];
	ll INF = 1e18;
	vector<vector<vector<ll>>> dp(N + 1, vector<vector<ll>>(D + 1, vector<ll>(K + 1, -INF)));
	dp[0][0][0] = 0;
	auto chmax = [&](ll &d, ll s)
	{
		d = max(d, s);
	};
	rep(i, N) {
		dp[i + 1] = dp[i];
		rep(j, D) {
			rep(k, K) {
				if(dp[i][j][k] == -INF) continue;
				ll t = k + c[i];
				if(t > K) t = K;
				chmax(dp[i + 1][j + 1][t], dp[i][j][k] + a[i]);
			}
		}
	}
	ll ans = dp[N][D][K];
	if(ans == -INF) cout << "No" << endl;
	else cout << ans << endl;
}