import java.util.*;

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

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