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];
    double sum = 0;
    for(int i = 0 ; i < n ; i++){
      a[i] = sc.nextInt();
      sum += a[i];
    }
      double min = sum / (4 * m);
      int num = n;
      for(int i = 0 ; i < n ; i++){
        if(a[i] < min)
          num--;
    }
    
      
	
	System.out.println(num >= m ? "Yes" : "No");
	}
} 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];
    double sum = 0;
    for(int i = 0 ; i < n ; i++){
      a[i] = sc.nextInt();
      sum += a[i];
    }
      double min = sum / (4 * m);
      int num = n;
      for(int i = 0 ; i < n ; i++){
        if(a[i] < min)
          num--;
    }
    
      
	
	System.out.println(num >= m ? "Yes" : "No");
	}
} 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];
    double sum = 0;
    for(int i = 0 ; i < n ; i++){
      a[i] = sc.nextInt();
      sum += a[i];
    }
      double min = sum / (4 * m);
      int num = n;
      for(int i = 0 ; i < n ; i++){
        if(a[i] < min)
          num--;
    }
    
      
	
	System.out.println(num >= m ? "Yes" : "No");
	} main {
	Scanner sc = new Scanner(System.in);
	int n = sc.nextInt();
	int m = sc.nextInt();
    int[] a = new int[n];
    double sum = 0;
    for(int i = 0 ; i < n ; i++){
      a[i] = sc.nextInt();
      sum += a[i];
    }
      double min = sum / (4 * m);
      int num = n;
      for(int i = 0 ; i < n ; i++){
        if(a[i] < min)
          num--;
    }
    
      
	
	System.out.println(num >= m ? "Yes" : "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 int[] a = new int[n]; a new int[n] n double sum = 0; sum 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 double min = sum / (4 * m); min sum / (4 * m) sum (4 * m) 4 m int num = n; num n for(int i = 0 ; i < n ; i++){
        if(a[i] < min)
          num--;
    } int i = 0 ; int i = 0 ; i 0 i < n i n i++ i++ i {
        if(a[i] < min)
          num--;
    } {
        if(a[i] < min)
          num--;
    } if(a[i] < min)
          num--; a[i] < min a[i] a i min num-- num System.out.println(num >= m ? "Yes" : "No") System.out.println System.out System System.out num >= m ? "Yes" : "No" num >= m num m "Yes" "No" 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];
    double sum = 0;
    for(int i = 0 ; i < n ; i++){
      a[i] = sc.nextInt();
      sum += a[i];
    }
      double min = sum / (4 * m);
      int num = n;
      for(int i = 0 ; i < n ; i++){
        if(a[i] < min)
          num--;
    }
    
      
	
	System.out.println(num >= m ? "Yes" : "No");
	}
} 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];
    double sum = 0;
    for(int i = 0 ; i < n ; i++){
      a[i] = sc.nextInt();
      sum += a[i];
    }
      double min = sum / (4 * m);
      int num = n;
      for(int i = 0 ; i < n ; i++){
        if(a[i] < min)
          num--;
    }
    
      
	
	System.out.println(num >= m ? "Yes" : "No");
	}
} 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];
    double sum = 0;
    for(int i = 0 ; i < n ; i++){
      a[i] = sc.nextInt();
      sum += a[i];
    }
      double min = sum / (4 * m);
      int num = n;
      for(int i = 0 ; i < n ; i++){
        if(a[i] < min)
          num--;
    }
    
      
	
	System.out.println(num >= m ? "Yes" : "No");
	}
}