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