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");
    }
  }
} import java.util.Scanner; Scanner java.util 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");
    }
  }
} 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");
    }
  } main {
    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");
    }
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int m = sc.nextInt(); m sc.nextInt() sc.nextInt sc float total = 0; total 0 int counter = 0; counter 0 int[] a = new int[n]; a new int[n] n for(int i = 0; i < n; i++){
      a[i] = sc.nextInt();
      total += a[i];
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      a[i] = sc.nextInt();
      total += a[i];
    } {
      a[i] = sc.nextInt();
      total += a[i];
    } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc total += a[i] total a[i] a i float p = total / (4 * m); p total / (4 * m) total (4 * m) 4 m for(int i = 0; i < n; i++){
      if(a[i] >= p){
        counter++;
      }
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      if(a[i] >= p){
        counter++;
      }
    } {
      if(a[i] >= p){
        counter++;
      }
    } if(a[i] >= p){
        counter++;
      } a[i] >= p a[i] a i p {
        counter++;
      } 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 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");
    }
  }
} 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");
    }
  }
} Main
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");
    }
  }
}