import java.util.Scanner;

public class Main {
    public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);

        int N = scanner.nextInt();
        int M = scanner.nextInt();

        int[] a = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            a[i] = scanner.nextInt();
            sum += a[i];
        }

        int count = 0;
        for (int i = 0; i < N; i++) {
            if (a[i] / (double) sum >= 1 / (4.0 * M)) {
                count++;
            }
        }
        

        System.out.print(count >= M ? "Yes" : "No");

        scanner.close();
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz