import java.util.*;

class Main{
public static void main(String[] args) {
  Scanner reader=new Scanner(System.in);
  int n=reader.nextInt();
  int m=reader.nextInt();
  Integer a[]=new Integer[n];
  int sum=0;

  for(int i=0;i<n;i++)
  {
    a[i]=(Integer)reader.nextInt();
    sum+=a[i];

  }
  Arrays.sort(a,Collections.reverseOrder());

  for(int i=0;i<m;i++)
  {
    if(a[i]*4*m<sum){
    System.out.println("No");
    return;
  }

  }
  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