import java.util.ArrayList;
import java.util.Scanner;
import java.util.Comparator;
import java.util.Collections;
 
class Main {
	public static void main(String[] args) {
 
	    Scanner sc = new Scanner(System.in);
	    double N = sc.nextDouble();
	    double M = sc.nextDouble();
	    ArrayList<Double> A = new ArrayList<>();
	    double total = 0;
	    double vote = 0;
	    
	    for (int i = 0; i < N; i++) {
	      vote = sc.nextDouble();
	      total += vote;
	      A.add(vote);
	    }
	    
	    Collections.sort(A, Comparator.reverseOrder());
	    
	    for (int j = 0; j < M; j++) {
	      if (!(A.get(j)/total >= 1/(4*M))) {
	        System.out.println("No");
	        return;
	      }
	    }
	    System.out.println("Yes");
 
	  }
} import java.util.ArrayList; ArrayList java.util import java.util.Scanner; Scanner java.util import java.util.Comparator; Comparator java.util import java.util.Collections; Collections java.util class Main {
	public static void main(String[] args) {
 
	    Scanner sc = new Scanner(System.in);
	    double N = sc.nextDouble();
	    double M = sc.nextDouble();
	    ArrayList<Double> A = new ArrayList<>();
	    double total = 0;
	    double vote = 0;
	    
	    for (int i = 0; i < N; i++) {
	      vote = sc.nextDouble();
	      total += vote;
	      A.add(vote);
	    }
	    
	    Collections.sort(A, Comparator.reverseOrder());
	    
	    for (int j = 0; j < M; j++) {
	      if (!(A.get(j)/total >= 1/(4*M))) {
	        System.out.println("No");
	        return;
	      }
	    }
	    System.out.println("Yes");
 
	  }
} Main public static void main(String[] args) {
 
	    Scanner sc = new Scanner(System.in);
	    double N = sc.nextDouble();
	    double M = sc.nextDouble();
	    ArrayList<Double> A = new ArrayList<>();
	    double total = 0;
	    double vote = 0;
	    
	    for (int i = 0; i < N; i++) {
	      vote = sc.nextDouble();
	      total += vote;
	      A.add(vote);
	    }
	    
	    Collections.sort(A, Comparator.reverseOrder());
	    
	    for (int j = 0; j < M; j++) {
	      if (!(A.get(j)/total >= 1/(4*M))) {
	        System.out.println("No");
	        return;
	      }
	    }
	    System.out.println("Yes");
 
	  } main {
 
	    Scanner sc = new Scanner(System.in);
	    double N = sc.nextDouble();
	    double M = sc.nextDouble();
	    ArrayList<Double> A = new ArrayList<>();
	    double total = 0;
	    double vote = 0;
	    
	    for (int i = 0; i < N; i++) {
	      vote = sc.nextDouble();
	      total += vote;
	      A.add(vote);
	    }
	    
	    Collections.sort(A, Comparator.reverseOrder());
	    
	    for (int j = 0; j < M; j++) {
	      if (!(A.get(j)/total >= 1/(4*M))) {
	        System.out.println("No");
	        return;
	      }
	    }
	    System.out.println("Yes");
 
	  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) double N = sc.nextDouble(); N sc.nextDouble() sc.nextDouble sc double M = sc.nextDouble(); M sc.nextDouble() sc.nextDouble sc ArrayList<Double> A = new ArrayList<>(); A new ArrayList<>() double total = 0; total 0 double vote = 0; vote 0 for (int i = 0; i < N; i++) {
	      vote = sc.nextDouble();
	      total += vote;
	      A.add(vote);
	    } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
	      vote = sc.nextDouble();
	      total += vote;
	      A.add(vote);
	    } {
	      vote = sc.nextDouble();
	      total += vote;
	      A.add(vote);
	    } vote = sc.nextDouble() vote sc.nextDouble() sc.nextDouble sc total += vote total vote A.add(vote) A.add A vote Collections.sort(A, Comparator.reverseOrder()) Collections.sort Collections A Comparator.reverseOrder() Comparator.reverseOrder Comparator for (int j = 0; j < M; j++) {
	      if (!(A.get(j)/total >= 1/(4*M))) {
	        System.out.println("No");
	        return;
	      }
	    } int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
	      if (!(A.get(j)/total >= 1/(4*M))) {
	        System.out.println("No");
	        return;
	      }
	    } {
	      if (!(A.get(j)/total >= 1/(4*M))) {
	        System.out.println("No");
	        return;
	      }
	    } if (!(A.get(j)/total >= 1/(4*M))) {
	        System.out.println("No");
	        return;
	      } !(A.get(j)/total >= 1/(4*M)) (A.get(j)/total >= 1/(4*M)) A.get(j)/total A.get(j) A.get A j total 1/(4*M) 1 (4*M) 4 M {
	        System.out.println("No");
	        return;
	      } System.out.println("No") System.out.println System.out System System.out "No" return; System.out.println("Yes") System.out.println System.out System System.out "Yes" String[] args args
import java.util.ArrayList;
import java.util.Scanner;
import java.util.Comparator;
import java.util.Collections;
 
class Main {
	public static void main(String[] args) {
 
	    Scanner sc = new Scanner(System.in);
	    double N = sc.nextDouble();
	    double M = sc.nextDouble();
	    ArrayList<Double> A = new ArrayList<>();
	    double total = 0;
	    double vote = 0;
	    
	    for (int i = 0; i < N; i++) {
	      vote = sc.nextDouble();
	      total += vote;
	      A.add(vote);
	    }
	    
	    Collections.sort(A, Comparator.reverseOrder());
	    
	    for (int j = 0; j < M; j++) {
	      if (!(A.get(j)/total >= 1/(4*M))) {
	        System.out.println("No");
	        return;
	      }
	    }
	    System.out.println("Yes");
 
	  }
}