import java.util.*;
class Main{
    static Scanner sc=new Scanner(System.in);
    public static void main(String[] args){
        int N = sc.nextInt();
        int M = sc.nextInt();
        int a[] = new int[N];
        double sum = 0;
        for(int i=0;i<N;i++){
            a[i] = sc.nextInt();
            sum = sum+a[i];
        }
        Arrays.sort(a);
        for (int i = 0; i < a.length/2; i++) {
            int temp = a[i];
            a[i]= a[a.length - 1 - i];
            a[a.length - 1 - i]= temp;
        }
        boolean anst = true;
        for(int i=0;i<M;i++){
            if(a[i]<(sum/(4*M))){
                anst = false;
                break;
            }
        }
        if(anst)
            System.out.println("Yes");
        else
            System.out.println("No");
    }
}
/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