import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        ArrayList<Integer> list = new ArrayList<>();
        int n = Integer.parseInt(sc.next());
        int m = Integer.parseInt(sc.next());
        for (int i = 0; i < n; i++) {
            list.add(Integer.parseInt(sc.next()));
        }
        Collections.sort(list);
        Collections.reverse(list);
        int allVote = 0;
        for (Integer i : list) {
            allVote += i;
        }

        double limit = allVote / (4.0 * m);
        String answer = "Yes";
        for (int i = 0; i < m; i++) {
            int vote = list.get(i);
            if (vote < limit) {
                answer = "No";
                break;
            }
        }
        System.out.println(answer);
        sc.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