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();
    int count = 0;
    int sum = 0;
    int[] a = new int[n];
    for(int i = 0;i < n;i++){
      a[i] = sc.nextInt();
      sum += a[i];
    }
    double line  = ((double)sum / (4 * m));
    for(int j = 0;j < n;j++){
      if(a[j] >= line) count++;
    }
    if(m <= count){
      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();
    int count = 0;
    int sum = 0;
    int[] a = new int[n];
    for(int i = 0;i < n;i++){
      a[i] = sc.nextInt();
      sum += a[i];
    }
    double line  = ((double)sum / (4 * m));
    for(int j = 0;j < n;j++){
      if(a[j] >= line) count++;
    }
    if(m <= count){
      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();
    int count = 0;
    int sum = 0;
    int[] a = new int[n];
    for(int i = 0;i < n;i++){
      a[i] = sc.nextInt();
      sum += a[i];
    }
    double line  = ((double)sum / (4 * m));
    for(int j = 0;j < n;j++){
      if(a[j] >= line) count++;
    }
    if(m <= count){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int m = sc.nextInt();
    int count = 0;
    int sum = 0;
    int[] a = new int[n];
    for(int i = 0;i < n;i++){
      a[i] = sc.nextInt();
      sum += a[i];
    }
    double line  = ((double)sum / (4 * m));
    for(int j = 0;j < n;j++){
      if(a[j] >= line) count++;
    }
    if(m <= count){
      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 int count = 0; count 0 int sum = 0; sum 0 int[] a = new int[n]; a new int[n] n for(int i = 0;i < n;i++){
      a[i] = sc.nextInt();
      sum += a[i];
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      a[i] = sc.nextInt();
      sum += a[i];
    } {
      a[i] = sc.nextInt();
      sum += a[i];
    } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc sum += a[i] sum a[i] a i double line  = ((double)sum / (4 * m)); line ((double)sum / (4 * m)) (double)sum (4 * m) 4 m for(int j = 0;j < n;j++){
      if(a[j] >= line) count++;
    } int j = 0; int j = 0; j 0 j < n j n j++ j++ j {
      if(a[j] >= line) count++;
    } {
      if(a[j] >= line) count++;
    } if(a[j] >= line) count++; a[j] >= line a[j] a j line count++ count if(m <= count){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    } m <= count m count {
      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();
    int count = 0;
    int sum = 0;
    int[] a = new int[n];
    for(int i = 0;i < n;i++){
      a[i] = sc.nextInt();
      sum += a[i];
    }
    double line  = ((double)sum / (4 * m));
    for(int j = 0;j < n;j++){
      if(a[j] >= line) count++;
    }
    if(m <= count){
      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();
    int count = 0;
    int sum = 0;
    int[] a = new int[n];
    for(int i = 0;i < n;i++){
      a[i] = sc.nextInt();
      sum += a[i];
    }
    double line  = ((double)sum / (4 * m));
    for(int j = 0;j < n;j++){
      if(a[j] >= line) count++;
    }
    if(m <= count){
      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();
    int count = 0;
    int sum = 0;
    int[] a = new int[n];
    for(int i = 0;i < n;i++){
      a[i] = sc.nextInt();
      sum += a[i];
    }
    double line  = ((double)sum / (4 * m));
    for(int j = 0;j < n;j++){
      if(a[j] >= line) count++;
    }
    if(m <= count){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
}