#include <bits/stdc++.h>
using namespace std;
#define int long long
const int N = 2e5 + 10;
int n, x, y;
int a[N], b[N];
int a1 = 0, b1 = 0, m = 0;

signed main() {
	cin >> n >> x >> y;
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
	}
	sort(a + 1, a + n + 1);
	for (int i = 1; i <= n; i++) {
		cin >> b[i];
	}
	sort(b + 1, b + n + 1);
	for (int i = n; i > 0; i--) {
		m++;
		a1 += a[i];
		b1 += b[i];
		if (a1 > x || b1 > y) {
			cout << m << '\n';
			return 0;
		}
	}
	cout << m << '\n';
	return 0;
}