import java.util.Scanner;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int m = sc.nextInt();
    float total = 0;
    int counter = 0;
    int[] a = new int[n];
    
    for(int i = 0; i < n; i++){
      a[i] = sc.nextInt();
      total += a[i];
    }
    float p = total / (4 * m);
    
    for(int i = 0; i < n; i++){
      if(a[i] >= p){
        counter++;
      }
    }
    if(counter >= m){
      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