import java.util.Scanner;
 
public class Main{
 
 public static void main(String[] args){
  
   Scanner sc = new Scanner(System.in);
   
   int n = sc.nextInt();
   
   int m = sc.nextInt();
   
   int count = 0;
   
   int all = 0;
   
   String yon = "";
   
   double d = 0.0;
   
   int[] array = new int[n];
   
   for (int i = 0; i<array.length; i++){
    
     array[i] = sc.nextInt();
     
     all += array[i];
     
   }
   
   d = all/(4.0*(double)m);
   
   for(int i:array){
    
    if((double)i >= d){
      
      count += 1;
  	
    }
     
   }
   
   if(count >= m){
     
     yon = "Yes";
   
   }else{
     
     yon = "No";
     
   }
   
   System.out.println(yon);
   
 }
  
  
  
  
}   import java.util.Scanner; Scanner 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 count = 0;
   
   int all = 0;
   
   String yon = "";
   
   double d = 0.0;
   
   int[] array = new int[n];
   
   for (int i = 0; i<array.length; i++){
    
     array[i] = sc.nextInt();
     
     all += array[i];
     
   }
   
   d = all/(4.0*(double)m);
   
   for(int i:array){
    
    if((double)i >= d){
      
      count += 1;
  	
    }
     
   }
   
   if(count >= m){
     
     yon = "Yes";
   
   }else{
     
     yon = "No";
     
   }
   
   System.out.println(yon);
   
 }
  
  
  
  
} Main public static void main(String[] args){
  
   Scanner sc = new Scanner(System.in);
   
   int n = sc.nextInt();
   
   int m = sc.nextInt();
   
   int count = 0;
   
   int all = 0;
   
   String yon = "";
   
   double d = 0.0;
   
   int[] array = new int[n];
   
   for (int i = 0; i<array.length; i++){
    
     array[i] = sc.nextInt();
     
     all += array[i];
     
   }
   
   d = all/(4.0*(double)m);
   
   for(int i:array){
    
    if((double)i >= d){
      
      count += 1;
  	
    }
     
   }
   
   if(count >= m){
     
     yon = "Yes";
   
   }else{
     
     yon = "No";
     
   }
   
   System.out.println(yon);
   
 } main {
  
   Scanner sc = new Scanner(System.in);
   
   int n = sc.nextInt();
   
   int m = sc.nextInt();
   
   int count = 0;
   
   int all = 0;
   
   String yon = "";
   
   double d = 0.0;
   
   int[] array = new int[n];
   
   for (int i = 0; i<array.length; i++){
    
     array[i] = sc.nextInt();
     
     all += array[i];
     
   }
   
   d = all/(4.0*(double)m);
   
   for(int i:array){
    
    if((double)i >= d){
      
      count += 1;
  	
    }
     
   }
   
   if(count >= m){
     
     yon = "Yes";
   
   }else{
     
     yon = "No";
     
   }
   
   System.out.println(yon);
   
 } 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 count = 0; count 0 int all = 0; all 0 String yon = ""; yon "" double d = 0.0; d 0.0 int[] array = new int[n]; array new int[n] n for (int i = 0; i<array.length; i++){
    
     array[i] = sc.nextInt();
     
     all += array[i];
     
   } int i = 0; int i = 0; i 0 i<array.length i array.length array array.length i++ i++ i {
    
     array[i] = sc.nextInt();
     
     all += array[i];
     
   } {
    
     array[i] = sc.nextInt();
     
     all += array[i];
     
   } array[i] = sc.nextInt() array[i] array i sc.nextInt() sc.nextInt sc all += array[i] all array[i] array i d = all/(4.0*(double)m) d all/(4.0*(double)m) all (4.0*(double)m) 4.0 (double)m for(int i:array){
    
    if((double)i >= d){
      
      count += 1;
  	
    }
     
   } int i array {
    
    if((double)i >= d){
      
      count += 1;
  	
    }
     
   } {
    
    if((double)i >= d){
      
      count += 1;
  	
    }
     
   } if((double)i >= d){
      
      count += 1;
  	
    } (double)i >= d (double)i d {
      
      count += 1;
  	
    } count += 1 count 1 if(count >= m){
     
     yon = "Yes";
   
   }else{
     
     yon = "No";
     
   } count >= m count m {
     
     yon = "Yes";
   
   } yon = "Yes" yon "Yes" {
     
     yon = "No";
     
   } yon = "No" yon "No" System.out.println(yon) System.out.println System.out System System.out yon 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 count = 0;
   
   int all = 0;
   
   String yon = "";
   
   double d = 0.0;
   
   int[] array = new int[n];
   
   for (int i = 0; i<array.length; i++){
    
     array[i] = sc.nextInt();
     
     all += array[i];
     
   }
   
   d = all/(4.0*(double)m);
   
   for(int i:array){
    
    if((double)i >= d){
      
      count += 1;
  	
    }
     
   }
   
   if(count >= m){
     
     yon = "Yes";
   
   }else{
     
     yon = "No";
     
   }
   
   System.out.println(yon);
   
 }
  
  
  
  
} public class Main{
 
 public static void main(String[] args){
  
   Scanner sc = new Scanner(System.in);
   
   int n = sc.nextInt();
   
   int m = sc.nextInt();
   
   int count = 0;
   
   int all = 0;
   
   String yon = "";
   
   double d = 0.0;
   
   int[] array = new int[n];
   
   for (int i = 0; i<array.length; i++){
    
     array[i] = sc.nextInt();
     
     all += array[i];
     
   }
   
   d = all/(4.0*(double)m);
   
   for(int i:array){
    
    if((double)i >= d){
      
      count += 1;
  	
    }
     
   }
   
   if(count >= m){
     
     yon = "Yes";
   
   }else{
     
     yon = "No";
     
   }
   
   System.out.println(yon);
   
 }
  
  
  
  
} Main
import java.util.Scanner;
 
public class Main{
 
 public static void main(String[] args){
  
   Scanner sc = new Scanner(System.in);
   
   int n = sc.nextInt();
   
   int m = sc.nextInt();
   
   int count = 0;
   
   int all = 0;
   
   String yon = "";
   
   double d = 0.0;
   
   int[] array = new int[n];
   
   for (int i = 0; i<array.length; i++){
    
     array[i] = sc.nextInt();
     
     all += array[i];
     
   }
   
   d = all/(4.0*(double)m);
   
   for(int i:array){
    
    if((double)i >= d){
      
      count += 1;
  	
    }
     
   }
   
   if(count >= m){
     
     yon = "Yes";
   
   }else{
     
     yon = "No";
     
   }
   
   System.out.println(yon);
   
 }
  
  
  
  
}  