import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int sum = 0;
    int count = 0;
    int[] a = new int[n];
    for (int i = 0;i<n;i++){
      a[i] = scan.nextInt();
      sum += a[i];
    }
    for (int j=0;j<n;j++){
      if (a[j]*4*m>=sum){
        count += 1;
      }
    }

    if (count<m){
      System.out.println("No");
    }
    else{
      System.out.println("Yes");
    }
  }
} import java.util.*; util.* java public class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int sum = 0;
    int count = 0;
    int[] a = new int[n];
    for (int i = 0;i<n;i++){
      a[i] = scan.nextInt();
      sum += a[i];
    }
    for (int j=0;j<n;j++){
      if (a[j]*4*m>=sum){
        count += 1;
      }
    }

    if (count<m){
      System.out.println("No");
    }
    else{
      System.out.println("Yes");
    }
  }
} Main public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int sum = 0;
    int count = 0;
    int[] a = new int[n];
    for (int i = 0;i<n;i++){
      a[i] = scan.nextInt();
      sum += a[i];
    }
    for (int j=0;j<n;j++){
      if (a[j]*4*m>=sum){
        count += 1;
      }
    }

    if (count<m){
      System.out.println("No");
    }
    else{
      System.out.println("Yes");
    }
  } main {
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int sum = 0;
    int count = 0;
    int[] a = new int[n];
    for (int i = 0;i<n;i++){
      a[i] = scan.nextInt();
      sum += a[i];
    }
    for (int j=0;j<n;j++){
      if (a[j]*4*m>=sum){
        count += 1;
      }
    }

    if (count<m){
      System.out.println("No");
    }
    else{
      System.out.println("Yes");
    }
  } 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 sum = 0; sum 0 int count = 0; count 0 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 for (int j=0;j<n;j++){
      if (a[j]*4*m>=sum){
        count += 1;
      }
    } int j=0; int j=0; j 0 j<n j n j++ j++ j {
      if (a[j]*4*m>=sum){
        count += 1;
      }
    } {
      if (a[j]*4*m>=sum){
        count += 1;
      }
    } if (a[j]*4*m>=sum){
        count += 1;
      } a[j]*4*m>=sum a[j]*4*m a[j]*4*m a[j] a j 4 m sum {
        count += 1;
      } count += 1 count 1 if (count<m){
      System.out.println("No");
    }
    else{
      System.out.println("Yes");
    } count<m count m {
      System.out.println("No");
    } System.out.println("No") System.out.println System.out System System.out "No" {
      System.out.println("Yes");
    } System.out.println("Yes") System.out.println System.out System System.out "Yes" String[] args args public class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int sum = 0;
    int count = 0;
    int[] a = new int[n];
    for (int i = 0;i<n;i++){
      a[i] = scan.nextInt();
      sum += a[i];
    }
    for (int j=0;j<n;j++){
      if (a[j]*4*m>=sum){
        count += 1;
      }
    }

    if (count<m){
      System.out.println("No");
    }
    else{
      System.out.println("Yes");
    }
  }
} public class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int sum = 0;
    int count = 0;
    int[] a = new int[n];
    for (int i = 0;i<n;i++){
      a[i] = scan.nextInt();
      sum += a[i];
    }
    for (int j=0;j<n;j++){
      if (a[j]*4*m>=sum){
        count += 1;
      }
    }

    if (count<m){
      System.out.println("No");
    }
    else{
      System.out.println("Yes");
    }
  }
} Main
import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int sum = 0;
    int count = 0;
    int[] a = new int[n];
    for (int i = 0;i<n;i++){
      a[i] = scan.nextInt();
      sum += a[i];
    }
    for (int j=0;j<n;j++){
      if (a[j]*4*m>=sum){
        count += 1;
      }
    }

    if (count<m){
      System.out.println("No");
    }
    else{
      System.out.println("Yes");
    }
  }
}
