import java.util.*;
import java.lang.Math;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int sum = 0;

        List<Integer> list = new ArrayList<>();

        for(int i = 0; i < n; i++){
            list.add(sc.nextInt());
            sum += list.get(i);
        }
        double vote = (double)sum/(4.0*(double)m);
        Collections.sort(list);
        Collections.reverse(list);
        // for(int i: list){
        //     System.out.print(i+" ");
        // }
        if(list.get(m-1) < Math.ceil(vote)) System.out.println("No");
        else System.out.println("Yes");
    }
}
/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