#ifndef MAIN
#define MAIN
#include __FILE__

string solve(int n, int d, int k, vector<int> a, vector<int> c)
{
	assert(n >= d && d >= 1 && k >= 1 && n <= 500 && k <= 1000 && *min_element(all(a)) >= -1000000000 && *max_element(all(a)) <= 1000000000 && *min_element(all(c)) >= 0 && *max_element(all(c)) <= 1000000000);
	vector<vector<int>> dp(d + 1, vector<int>(k + 1, -inf));
	dp[0][0] = 0;
	rep(i, n)
	{
		repr(j, d)
		{
			repr(l, k + 1)
			{
				if (dp[j][l] != -inf)
					if (dp[j + 1][min(k, l + c[i])] < dp[j][l] + a[i])
						dp[j + 1][min(k, l + c[i])] = dp[j][l] + a[i];
			}
		}
	}
	int ans = dp[d][k];
	if (ans == -inf)
	{
		return "No";
	}
	return to_string(ans);
}

void _main()
{
	cint(n, d, k);
	cvec(n, a);
	cvec(n, c);
	cout << solve(n, d, k, a, c) << endl;
}

#else

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef vector<string> strvec;

constexpr ll mod10 = 1000000007;
constexpr ll mod9 = 998244353;

#define int ll
#define double ld
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repf(i, s, n) for (int i = s; i < (int)(n); i++)
#define repr(i, n) for (int i = n - 1; i >= 0; i--)
#define reprt(i, e, n) for (int i = n - 1; i >= e; i--)
#define rep2(i, j, n, m) rep(i, n) rep(j, m)
template <class... Args>
void __y_input(Args &...arg)
{

	(cin >> ... >> arg);
}

template <class... Args>
void __y_input_vec_1(int p, Args &...args)
{
	(cin >> ... >> args[p]);
}
template <class... Args>
void __y_input_vec_2(int p, int q, Args &...args)
{
	(cin >> ... >> args[p][q]);
}
template <class Arg>
void __y_input_vec_resize(int size, Arg &arg)
{
	arg.resize(size);
}
template <class Arg_t>
void __y_input_vec_resize_2(int n, int m, vector<Arg_t> &arg)
{
	arg.assign(n, Arg_t(m));
}
template <class... Args>
void __y_input_vec(int n, Args &...args)
{
	(__y_input_vec_resize(n, args), ...);
	rep(i, n)
	{
		(__y_input_vec_1(i, args), ...);
	}
}
template <class... Args>
void __y_input_vec2(int n, int m, Args &...args)
{
	(__y_input_vec_resize_2(n, m, args), ...);
	rep2(i, j, n, m)
	{
		(__y_input_vec_2(i, j, args), ...);
	}
}
template <class T, class... Args>
void SyncSort(vector<T> &vec, vector<Args> &...args)
{
	vector<pair<T, tuple<Args...>>> z;
	rep(i, vec.size())
	{
		z.push_back({vec[i], make_tuple(args.at(i)...)});
	}
	sort(z.begin(), z.end());
	rep(i, vec.size())
	{
		vec[i] = z[i].first;
		tie(args[i]...) = z[i].second;
	}
}

#define cint(...)    \
	int __VA_ARGS__; \
	__y_input(__VA_ARGS__)

#define cdbl(...)       \
	double __VA_ARGS__; \
	__y_input(__VA_ARGS__)

#define cstr(...)       \
	string __VA_ARGS__; \
	__y_input(__VA_ARGS__)

#define cit(t, ...) \
	t __VA_ARGS__;  \
	__y_input(__VA_ARGS__)

#define cvec(n, ...)         \
	vector<int> __VA_ARGS__; \
	__y_input_vec(n, __VA_ARGS__)

#define cvect(t, n, ...)   \
	vector<t> __VA_ARGS__; \
	__y_input_vec(n, __VA_ARGS__)

#define cvec2(n, m, ...)             \
	vector<vector<int>> __VA_ARGS__; \
	__y_input_vec2(n, m, __VA_ARGS__)

#define cvec2t(t, n, m, ...)       \
	vector<vector<t>> __VA_ARGS__; \
	__y_input_vec2(n, m, __VA_ARGS__)

#define cvecs(n, ...) cvect(string, n, __VA_ARGS__)

#define yn(bl) (bl ? "Yes" : "No")

#define all(v) v.begin(), v.end()

template <typename T>
using vec2 = vector<vector<T>>;
template <typename T>
using vec3 = vector<vector<vector<T>>>;

template <typename T>
constexpr T limit()
{
	return numeric_limits<long long>::max();
}

constexpr ll inf = limit<ll>() / 100;

template <typename T>
constexpr T limit(T _)
{
	return numeric_limits<long long>::max();
}

typedef array<int, 2> xy;
typedef array<int, 3> xyz;

template <typename T>
inline void sort(T &vec)
{
	return sort(vec.begin(), vec.end());
}
template <typename T>
inline void rsort(T &vec)
{
	return sort(vec.rbegin(), vec.rend());
}

template <typename T>
inline vector<vector<T>> rotate90(const vector<vector<T>> &vec)
{
	vector<vector<T>> res(vec[0].size(), vector<T>(vec.size()));
	rep(i, vec.size())
	{
		rep(j, vec[0].size())
		{
			res[j][vec.size() - i - 1] = vec[i][j];
		}
	}
	return res;
}

template <typename T>
ostream &operator<<(ostream &os, const vector<T> &vec)
{
	for (T val : vec)
	{
		os << val << ' ';
	}
	return os;
}

template <typename T>
vector<T> &operator+=(vector<T> &vec, const T &val)
{
	vec.push_back(val);
	return vec;
}

template <typename T>
vector<T> &operator+=(vector<T> &vec, const vector<T> &val)
{
	vec.insert(vec.end(), val.begin(), val.end());
	return vec;
}

template <typename T>
vector<T> &operator+=(vector<T> &vec, const initializer_list<T> &val)
{
	vec.insert(vec.end(), val.begin(), val.end());
	return vec;
}

template <typename T>
vector<vector<T>> operator*(vector<T> &vec, int val)
{
	return vector<vector<T>>(val, vec);
}

void _main();
signed main()
{
	cin.tie(0);
	ios_base::sync_with_stdio(false);
	cout << fixed << setprecision(15);
	_main();
	return 0;
}

// Libraries Begin

class Debugger
{
	ostream &os;

public:
	Debugger(ostream &os) : os{os} {}

	template <typename T>
	Debugger &operator,(T val)
	{
		os << val << ' ';
		return *this;
	}

	Debugger &operator,(char val)
	{
		os << val;
		return *this;
	}

	template <typename T>
	Debugger &operator,(vector<T> vec)
	{
		*this, '[';
		rep(i, vec.size())
		{
			*this, vec[i], ' ', ", "[i + 1 == vec.size()];
		}
		*this, "]\n";
		return *this;
	}

	template <typename T, typename U>
	Debugger &operator,(map<T, U> mp)
	{
		*this, "{\n";
		for (auto [key, val] : mp)
		{
			*this, '\t', key, ": ", val, '\n';
		}
		*this, "}\n";
		return *this;
	}

	template <typename T, typename U>
	Debugger &operator,(pair<T, U> p)
	{
		*this, '(', p.first, ", ", p.second, ')';
		return *this;
	}
};

Debugger debugger(cerr);

map<int, int> prime_factorize(int n)
{
	map<int, int> res;
	for (int i = 2; i * i <= n; i += 1 + i > 2)
	{
		while (n % i == 0)
		{
			res[i]++;
			n /= i;
		}
	}
	if (n != 1)
	{
		res[n]++;
	}
	return res;
}

// Libraries End

// Defines

template <typename... T>
common_type_t<T...> __yc_max(T... args)
{
	return max(initializer_list<common_type_t<T...>>{args...});
}

template <typename... T>
common_type_t<T...> __yc_min(T... args)
{
	return min(initializer_list<common_type_t<T...>>{args...});
}

template <typename T>
vector<T> iota(size_t n, T start = 0)
{
	vector<T> res(n);
	iota(all(res), start);
	return res;
}

#define max(...) __yc_max(__VA_ARGS__)
#define min(...) __yc_min(__VA_ARGS__)

// Defines End

#endif

// 自分ここまでよくこのコード書いた！

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