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