import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = 4;
		int[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
		}
		int[] p = new int[n];
		for (int i = 0; i < n; i++) {
			p[i] = sc.nextInt();
		}
		int t = sc.nextInt();
		sc.close();

		int sum = 0;
		for (int i = 0; i < n; i++) {
			sum += a[i] * p[i];
		}
		if (sum <= t) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
}