import java.util.*;
class Main{
    public static void main(String[]args){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt(),m=sc.nextInt();
        int sum=0;
        int []a=new int[n];
        for(int i=0;i<n;i++){
            a[i]=sc.nextInt();
            sum+=a[i];
        }
        int ans=0;
        for(int i=0;i<n;i++){
            if(!(4*m*a[i]<sum)){
                ans++;
            }
        }
        System.out.println(ans<m?"No":"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