import java.util.Scanner;
class Main {
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int counter = 0;
    int sum = 0;
    double min;
    int[] a = new int[n];
    
    for(int i = 0;i < n;i++){
	  a[i] = scan.nextInt();
      sum += a[i];
    }
    
    min = sum / (4*(double)m);
    
    for(int i = 0;i < n;i++){
      if(a[i] >= min)counter++;
    }
    
    if(counter >= m){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
} import java.util.Scanner; Scanner java.util class Main {
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int counter = 0;
    int sum = 0;
    double min;
    int[] a = new int[n];
    
    for(int i = 0;i < n;i++){
	  a[i] = scan.nextInt();
      sum += a[i];
    }
    
    min = sum / (4*(double)m);
    
    for(int i = 0;i < n;i++){
      if(a[i] >= min)counter++;
    }
    
    if(counter >= m){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
} Main public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int counter = 0;
    int sum = 0;
    double min;
    int[] a = new int[n];
    
    for(int i = 0;i < n;i++){
	  a[i] = scan.nextInt();
      sum += a[i];
    }
    
    min = sum / (4*(double)m);
    
    for(int i = 0;i < n;i++){
      if(a[i] >= min)counter++;
    }
    
    if(counter >= m){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  } main {
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int counter = 0;
    int sum = 0;
    double min;
    int[] a = new int[n];
    
    for(int i = 0;i < n;i++){
	  a[i] = scan.nextInt();
      sum += a[i];
    }
    
    min = sum / (4*(double)m);
    
    for(int i = 0;i < n;i++){
      if(a[i] >= min)counter++;
    }
    
    if(counter >= m){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int n = scan.nextInt(); n scan.nextInt() scan.nextInt scan int m = scan.nextInt(); m scan.nextInt() scan.nextInt scan int counter = 0; counter 0 int sum = 0; sum 0 double min; min int[] a = new int[n]; a new int[n] n for(int i = 0;i < n;i++){
	  a[i] = scan.nextInt();
      sum += a[i];
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
	  a[i] = scan.nextInt();
      sum += a[i];
    } {
	  a[i] = scan.nextInt();
      sum += a[i];
    } a[i] = scan.nextInt() a[i] a i scan.nextInt() scan.nextInt scan sum += a[i] sum a[i] a i min = sum / (4*(double)m) min sum / (4*(double)m) sum (4*(double)m) 4 (double)m for(int i = 0;i < n;i++){
      if(a[i] >= min)counter++;
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      if(a[i] >= min)counter++;
    } {
      if(a[i] >= min)counter++;
    } if(a[i] >= min)counter++; a[i] >= min a[i] a i min counter++ counter if(counter >= m){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    } counter >= m counter m {
      System.out.println("Yes");
    } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
      System.out.println("No");
    } System.out.println("No") System.out.println System.out System System.out "No" String[] args args
import java.util.Scanner;
class Main {
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int counter = 0;
    int sum = 0;
    double min;
    int[] a = new int[n];
    
    for(int i = 0;i < n;i++){
	  a[i] = scan.nextInt();
      sum += a[i];
    }
    
    min = sum / (4*(double)m);
    
    for(int i = 0;i < n;i++){
      if(a[i] >= min)counter++;
    }
    
    if(counter >= m){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
}
