import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] sa = br.readLine().split(" ");
		int n = Integer.parseInt(sa[0]);
		int x = Integer.parseInt(sa[1]);
		int m = Integer.parseInt(sa[2]);
		sa = br.readLine().split(" ");
		int[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = Integer.parseInt(sa[i]);
		}
		br.close();

		int[] c = new int[n];
		for (int i = 0; i < n; i++) {
			while (a[i] >= x) {
				a[i] /= 2;
				c[i]++;
			}
		}

		int b = 0;
		int max = 0;
		for (int i = n - 1; i >= 0; i--) {
			if (c[i] > max) {
				b += (c[i] - max) * (i + 1);
				max = c[i];
			}
		}
		if (b <= m) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
}